Author: Miklós Kuczmann

Comparison of Outdoor Radiowave Propagation Models for Land Mobile Systems in the 3.6 GHz and 6 GHz Frequency Bands

Publication Name: Telecom

Publication Date: 2025-06-01

Volume: 6

Issue: 2

Page Range: Unknown

Description:

This paper presents a comparative analysis of three outdoor wave propagation models—ITU-R P.1546-6, the SUI model, and ITU-R P.452-17—benchmarked against the deterministic Parabolic Equation Modeling (PEM) method at 3.6 GHz and 6 GHz. The evaluation focuses on prediction accuracy (RMSE, MAE, bias, relative error), terrain sensitivity, and computational efficiency. At 3.6 GHz, ITU-R P.1546-6 shows poor terrain responsiveness and high relative errors, while ITU-R P.452-17 demonstrates strong terrain sensitivity and low errors in flat areas, but decreased accuracy over hilly terrain. At 6 GHz, the SUI model consistently underestimates field strength and exhibits weak terrain sensitivity, limiting its use to rough estimations. In contrast, ITU-R P.452-17 maintains good terrain correlation and acceptable accuracy, although it slightly overestimates field strength in complex environments. The results confirm that prediction accuracy, terrain sensitivity, and bias are highly model- and frequency-dependent. ITU-R P.452-17 emerges as the most reliable and computationally efficient alternative to deterministic methods when terrain effects must be considered without significant computational overhead.

Open Access: Yes

DOI: 10.3390/telecom6020042

Metamodel-based Optimization of Anisotropic Rotor Axial Flux Permanent Magnet Synchronous Motors

Miklós Kuczmann Attila Nyitrai

Publication Name: Periodica Polytechnica Electrical Engineering and Computer Science

Publication Date: 2025-01-01

Volume: 69

Issue: 1

Page Range: 89-98

Description:

Axial flux motors have some significant advantages over radial flux motors in high torque-density applications. However, the optimization of axial flux permanent magnet synchronous motors is a challenging task; the analysis usually requires 3D finite element analysis or the application of the 2D multi-slice method. In this paper a novel single-surrogate multi-slice method (SS-MSM) is proposed for modeling anisotropic rotor axial flux permanent magnet motors. However, the general methodology can be applied to other axial flux motors as well. A model calibration methodology has been described where the SS-MSM parameters have been determined using a 2D finite element approach as a reference. The SS-MSM was found to be suitable for a fast and reasonably accurate approximation of the motor performance. Based on the described analysis method, an efficient optimization approach is proposed.

Open Access: Yes

DOI: 10.3311/PPee.36813

Vehicle Dynamics Measurements with a Unique Measuring System for Trams

Miklós Kuczmann Szabolcs Fischer Péter Böröcz Szabolcs Kocsis Szurke Vivien Jóvér Bence Hermán

Publication Name: Lecture Notes in Networks and Systems

Publication Date: 2025-01-01

Volume: 1258 LNNS

Issue: Unknown

Page Range: 24-33

Description:

One of the paramount challenges in contemporary urban transport is the efficient maintenance and operation of tramway tracks, aiming to maximize their lifespan while ensuring safe and comfortable passenger travel. Traditional methods of examining superstructure systems through observation and geometric measurements are insufficient; understanding the dynamics of vehicles adhering to their schedules is equally critical. To address this, we developed an innovative portable vehicle dynamics measurement system equipped with accelerometers and a GPS module (with GNSS system), facilitating real-time tram dynamics testing. This versatile device can be deployed at any time and on any tram, enabling continuous monitoring of track conditions. The dynamic data gathered can be systematically compared with geometric measurements, providing comprehensive insights into the railway track's condition and informing maintenance strategies. The paper consists of several examples for comparison (geometric and dynamic data series) and discusses how to develop the instrument further.

Open Access: Yes

DOI: 10.1007/978-3-031-81799-1_3

Review of DC Motor Modeling and Linear Control: Theory with Laboratory Tests

Miklós Kuczmann

Publication Name: Electronics Switzerland

Publication Date: 2024-06-01

Volume: 13

Issue: 11

Page Range: Unknown

Description:

This review paper introduces the modeling, measurement, identification and control of direct current motors based on the state space modeling and the transfer function representation. These models are identified by real laboratory measurements, and the simulated results are compared with the measurements. Continuous-time and discrete-time PID (Proportional-Integral-Derivative) controllers, discrete-time state feedback and linear quadratic controllers are designed mathematically. The designed controllers are realized by the microcontroller Arduino UNO, and the behavior of the controllers is compared and analyzed. The noisy current signal has been measured by a discrete-time observer, steady-state Kalman filtering is also studied. The practical results of the implemented controllers support the theoretical results very well.

Open Access: Yes

DOI: 10.3390/electronics13112225

Laboratory and Numerical Investigation of Pre-Tensioned Reinforced Concrete Railway Sleepers Combined with Plastic Fiber Reinforcement

Szabolcs Fischer Mykola Sysyn Zoltán Major Sarah Khaleel Ibrahim Dmytro Kurhan Vivien Jóvér Szabolcs Szalai Hanna Csótár Klaudia Madarász András Pollák Dániel Harrach Bálint Molnár L. Gaspar Bence Hermán Szabolcs Kocsis Szurke Attila Németh I. Fekete Richárd Nagy Gusztáv Baranyai Miklós Kuczmann M. Movahedi Rad

Publication Name: Polymers

Publication Date: 2024-06-01

Volume: 16

Issue: 11

Page Range: Unknown

Description:

This research investigates the application of plastic fiber reinforcement in pre-tensioned reinforced concrete railway sleepers, conducting an in-depth examination in both experimental and computational aspects. Utilizing 3-point bending tests and the GOM ARAMIS system for Digital Image Correlation, this study meticulously evaluates the structural responses and crack development in conventional and plastic fiber-reinforced sleepers under varying bending moments. Complementing these tests, the investigation employs ABAQUS’ advanced finite element modeling to enhance the analysis, ensuring precise calibration and validation of the numerical models. This dual approach comprehensively explains the mechanical behavior differences and stresses within the examined structures. The incorporation of plastic fibers not only demonstrates a significant improvement in mechanical strength and crack resistance but paves the way for advancements in railway sleeper technology. By shedding light on the enhanced durability and performance of reinforced concrete structures, this study makes a significant contribution to civil engineering materials science, highlighting the potential for innovative material applications in the construction industry.

Open Access: Yes

DOI: 10.3390/polym16111498

Tensor Product Alternatives for Nonlinear Field-Oriented Control of Induction Machines

Miklós Kuczmann Krisztian Horvath

Publication Name: Electronics Switzerland

Publication Date: 2024-04-01

Volume: 13

Issue: 7

Page Range: Unknown

Description:

The paper presents a nonlinear field-oriented control technique based on the tensor product representation of the nonlinear induction machine model and the solvability of linear matrix inequalities. The nonlinear model has 32 quasi linear parameter-varying equivalent variants, and it is shown that only half of the models result in feasible controller. Two control goals are realized: torque control and speed control. The controller is a nonlinear state feedback controller completed by integral action. A new block diagram is investigated for speed control. The controller gains are designed by the solution of linear matrix inequalities to solve the Lyapunov inequality to obtain a stable and fast response and constraints on the control signal. The presented methods are verified and compared by simulations.

Open Access: Yes

DOI: 10.3390/electronics13071405

Remanufacturing a Synchronous Reluctance Machine with Aluminum Winding: An Open Benchmark Problem for FEM Analysis

Miklós Kuczmann Mihaly Katona Tamas Orosz Zoltan Nemeth Dávid Gábor Bányai

Publication Name: Electronics Switzerland

Publication Date: 2024-02-01

Volume: 13

Issue: 4

Page Range: Unknown

Description:

The European Union’s increasing focus on sustainable and eco-friendly product design has resulted in significant pressure on original equipment manufacturers to adopt more environmentally conscious practices. As a result, the remanufacturing of end-of-life electric machines is expected to become a promising industrial segment. Identifying the missing parameters of these types of machines will play an essential role in creating feasible and reliable redesigns and remanufacturing processes. A few case studies related to this problem have been published in the literature; however, some novel, openly accessible benchmark problems can facilitate the research and function as a basis for comparing and validating novel numerical methods. This paper presents the identification process of an experimental synchronous machine. It outlines methodologies for identifying material properties, winding schemes, and other critical parameters for the finite element analysis and modelling of electric machines with incomplete information. The machine in question is intended for remanufacturing, with the plan to replace its faulty winding with an aluminium-based alternative. It also serves as an open benchmark problem for researchers, designers, and practitioners.

Open Access: Yes

DOI: 10.3390/electronics13040727

Investigation of System Stability and the Design of a Controller based on the Transfer Function of a Quadcopter’s BLDC Motor

Miklós Kuczmann Á Ballagi Barnabás Kiss

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 751-756

Description:

The objective of this study is the control technology of quadcopters. The aim of this article is to propose further simulation assessment opportunities and other control implementations for investigating the transfer function of a quadrotor BLDC (Brushless Direct Current Electric Motor) motor obtained from experimental results in a previously published paper by separate authors. In this article, an LQ (linear-quadratic) controller is implemented based on the transmission function, during which the response of the controller to a unit step signal is examined. It is proved that LQ control can significantly enhance the autonomy of UAVs (Unmanned Aerial Vehicles) compared to PID (Proportional-Integral-Derivative Controller) control, as a faster and more accurate step response is achieved during system analysis. Additionally, how the LQ controller and the PID controller respond to a randomly generated white noise is examined. The results are compared with those implemented with a PID controller presented in a separate article.

Open Access: Yes

DOI: 10.3303/CET24114126

LMI feasibility analysis of 2DOF NATA model

Miklós Kuczmann Andrea Weber

Publication Name: Pollack Periodica

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Present paper shows the different types of tensor product model based linear matrix inequality controller design and feasibility analysis of two degrees of freedom aeroelastic wing section model. The tensor product models are based on reducing or removing the nonlinear behavior of the system and weighting functions. The linear matrix inequality based method results globally asymptotically stable system. The goal of the paper is to examine that selecting and varying the transformation space influences the feasibility of the linear matrix inequality based controller. The paper gives a comparison between the different tensor product models in terms of controller performance. The linear matrix inequality gives feasible solution for the controller design if the transformation space is selected adequately.

Open Access: Yes

DOI: 10.1556/606.2024.00888

Impact of Coordinate System Selection and Model Observability on Position Sensorless State Estimation of Nonsalient-Pole PMSM

Miklós Kuczmann Krisztian Horvath

Publication Name: 2024 IEEE 21st International Power Electronics and Motion Control Conference Pemc 2024

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Model observability is essential for the design of state estimators and observers, since the state vector can only be fully reconstructed from the measurements, if the model is observable. However, some research articles do not perform observability analysis and use unobservable models, while the presented results show adequate estimation performance. This paper deals with the impact of observability on the position sensorless state estimation of nonsalient-pole permanent magnet synchronous machine (PMSM). To show how the observability depends on the chosen coordinate system, observability studies are presented for two widely used nonlinear state-space models given in either the stator or the rotor reference frame. For the stationary reference frame model, a necessary and sufficient observability condition is defined, and it is shown that the model using rotor-oriented variables is unobservable. To point out the limitations of using the unobservable model, comparative simulations are carried out between extended Kalman filters using the models presented.

Open Access: Yes

DOI: 10.1109/PEMC61721.2024.10726413

Overview Study of the Applications of Unmanned Aerial Vehicles in the Transportation Sector †

Miklós Kuczmann Á Ballagi Barnabás Kiss

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

This study examines the use of Unmanned Aerial Vehicles (UAVs) in transportation, focusing on traffic monitoring and accident prevention. UAVs provide a cost-effective means for traffic surveillance, route planning, and accident analysis, enhancing data accuracy and timeliness. The paper discusses autonomous and human-intervention-supported drone systems for traffic surveillance, addressing technological and operational challenges and the balance needed for practical implementation. It also presents recent advancements, including a forerunner drone model, and references research on UAVs for maritime navigation safety, underscoring the need for their safe and efficient integration into transportation systems.

Open Access: Yes

DOI: 10.3390/engproc2024079011

Extending the TPTool MATLAB toolbox with LMI based observer and disturbance rejection design

Miklós Kuczmann Andrea Weber

Publication Name: Results in Control and Optimization

Publication Date: 2023-12-01

Volume: 13

Issue: Unknown

Page Range: Unknown

Description:

Present paper demonstrates the extensions of MATLAB TPtool toolbox. The toolbox does not include the LMI based observer and disturbance rejection design. Thus, the suggested extensions include the observer and H∞ based disturbance rejection LMI conditions for TP models. Furthermore this toolbox contains obsolete algorithms. Therefore, in this paper, the recommended algorithms are presented. Showing the proposed design method is based on a nonlinear dynamic system; modified TP model of the TORA example is used. Thus, the detailed observer and controller design, the disturbance rejection design are presented with LMI stability conditions through the HOSVD based method in the PDC framework.

Open Access: Yes

DOI: 10.1016/j.rico.2023.100302

Accuracy of the robust design analysis for the flux barrier modelling of an interior permanent magnet synchronous motor

Miklós Kuczmann Mihaly Katona Tamas Orosz

Publication Name: Journal of Computational and Applied Mathematics

Publication Date: 2023-09-01

Volume: 429

Issue: Unknown

Page Range: Unknown

Description:

Mass-produced electrical machines are subjected to manufacturing uncertainties in terms of geometry. A robust design is inevitable to ensure the consistent performance of the electric motor. Some parts of the rotor geometry are often simplified, like the flux barrier at the end of the magnets. This paper presents a design optimisation regarding the torque ripple and the average torque. The aim is to assess the effects of the flux barrier on the main properties of a permanent magnet synchronous motor. Also, robust design analysis is presented on the flux barrier. The computational burden of the robust design analysis is immense, even if uniform uncertainties are assumed. In this case, different Design of Experiment (DoE) methods reduce the number of simulations. The efficiency of the DoE methods is compared in terms of simulation number and extreme value approximation. We found that the Central Composite method is the most accurate, while the Plackett–Burman is the most efficient in this particular case.

Open Access: Yes

DOI: 10.1016/j.cam.2023.115228

Iron Loss Calculation Methods for Numerical Analysis of 3D-Printed Rotating Machines: A Review

Miklós Kuczmann Tamas Orosz Balázs Tóth B. Kocsis Tamás Horváth

Publication Name: Energies

Publication Date: 2023-09-01

Volume: 16

Issue: 18

Page Range: Unknown

Description:

Three-dimensional printing is a promising technology that offers increased freedom to create topologically optimised electrical machine designs with a much smaller layer thickness achievable with the current, laminated steel-sheet-based technology. These composite materials have promising magnetic behaviour, which can be competitive with the current magnetic materials. Accurately calculating the iron losses is challenging due to magnetic steels’ highly nonlinear hysteretic behaviour. Many numerical methodologies have been developed and applied in FEM-based simulations from the first introduced Steinmetz formulae. However, these old curve-fitting-based iron loss models are still actively used in modern finite-element solvers due to their simplicity and high computational demand for more-accurate mathematical methods, such as Preisach- or Jiles–Atherton-model-based calculations. In the case of 3D-printed electrical machines, where the printed material can have a strongly anisotropic behaviour and it is hard to define a standardised measurement, the applicability of the curve-fitting-based iron loss methodologies is limited. The following paper proposes an overview of the current problems and solutions for iron loss calculation and measurement methodologies and discusses their applicability in designing and optimising 3D-printed electrical machines.

Open Access: Yes

DOI: 10.3390/en16186547

Performance analysis of a robust design optimization of a solenoid with different sensitivity metrics

Miklós Kuczmann David Pánek Tamas Orosz

Publication Name: Journal of Computational and Applied Mathematics

Publication Date: 2023-05-01

Volume: 424

Issue: Unknown

Page Range: Unknown

Description:

Optimization is an essential part of designing electrical machines and devices. Considering the uncertainties and tolerances from the beginning of the design process can lead to a more robust design and significantly reduce the number of waste products during the manufacturing process. However, the computational demand for these robust design optimization problems is amazingly high. This paper examines how the computational demand and the robustness of the results depend on the applied sensitivity metric. The multi-objective TEAM 35 benchmark problem has been used as the basis of the comparison. This optimization task aims to create a homogeneous magnetic field in a predefined coil region, which is insensitive to the positioning errors of the coil turns. The original definition of the problem uses a simple worst-case sensitivity metric calculated from the extreme values of the optimized turn parameters in the given tolerance range. This sensitivity metric has been replaced by Plackett–Burman, Box–Behnken, and Central Composite Design-based metrics. It was shown in this simple geometry that there is a significant difference between the resulting sensitivities. Nevertheless, Plackett–Burman and Central Composite Design provided the more accurate and consistent estimate of the sensitivity of the examined layouts, with a higher but still reasonable computation demand than the worst-case metric.

Open Access: Yes

DOI: 10.1016/j.cam.2022.115021

Magnetic equivalent circuit and finite element modelling of anisotropic rotor axial flux permanent magnet synchronous motors with fractional slot distributed winding

Miklós Kuczmann Attila Nyitrai

Publication Name: Iet Electric Power Applications

Publication Date: 2023-05-01

Volume: 17

Issue: 5

Page Range: 709-720

Description:

Axial flux motors have been in the focus of many research work due to their promising properties when compared to conventional radial flux machines. Axial flux permanent magnet synchronous motors (AFPMSM) studied in the literature were mostly limited to surface-mounted permanent magnet machines (SPMSM), excluding only a few studies about axial flux internal permanent magnet (AFIPM) or permanent magnet-assisted synchronous reluctance (AFPMaSynRM) machines. Since numerous rotor topologies have been proposed and investigated in case of radial flux motors, analogous design methodologies can be developed in case of axial flux motors with rotor saliency. The parametrisation and modelling of a magnetically anisotropic rotor axial flux motor are presented. This approach is described generally and the method is applied to an example motor geometry. The results were validated by FEA (Finite Element Analysis), using the 2D multi-slice and 3D modelling approaches. The modelling error was calculated and the analytical and numerical methods were compared. It was found that the proposed model was suitable for calculating important parameters of the anisotropic rotor axial flux permanent magnet synchronous motor (AnR-AFPMSM) during the design process.

Open Access: Yes

DOI: 10.1049/elp2.12298

Temperature-Dependent Ferromagnetic Loss Approximation of an Induction Machine Stator Core Material Based on Laboratory Test Measurements

Miklós Kuczmann Tamas Orosz

Publication Name: Energies

Publication Date: 2023-02-01

Volume: 16

Issue: 3

Page Range: Unknown

Description:

The accurate measurement and modeling of ferromagnetic material losses are vital issues during the design and analysis of electrical machines. Higher loss values can describe the manufactured rotor and stator machine plates better than the catalog data obtained by standardized measurements using the Epstein frame. In this paper, different temperature-dependent models based on the loss-separation principle are introduced and compared with the measurements. The model parameters are computed from customized laboratory and standardized measurements. The customized measurements based on the stator part of an induction machine in the range of the automotive industry standard, i.e., in [−40 (Formula presented.) C, ⋯, 180 (Formula presented.) C]. The proposed model and measurement process can be used in the post-processing stage of numerical field analysis to obtain electromagnetic losses according to the agreement between measured and simulated results. During a numerically expensive optimization process, this model can be used to consider the temperature dependence of the losses more accurately. The study shows that more than 50% of loss increase can be measured, compared with the catalog data, if we use the manufactured, stator-based, customized measurements based on the estimation of the iron loss parameters.

Open Access: Yes

DOI: 10.3390/en16031116

A Novel Control Scheme Based on Exact Feedback Linearization Achieving Robust Constant Voltage for Boost Converter

Miklós Kuczmann Tamas Orosz Miklos CSIZMADIA

Publication Name: Electronics Switzerland

Publication Date: 2023-01-01

Volume: 12

Issue: 1

Page Range: Unknown

Description:

This paper presents a novel form of feedback linearization control (FBL) of boost-type DC/DC converter: to reach highly accurate output voltage control. Integral action has been inserted into the block diagram of the control scheme. The state-space model of the boost converter is highly nonlinear. Accordingly, the design procedure of the controller is more complex. The paper presents the state-space modeling of the boost converter and details the design procedure of the nonlinear FBL controller step by step. The main goal of this paper is to highlight the importance of the error integrator in the FBL control loop. The proposed method has been tested by a numerical example and compared with an existing and validated two-loop controller. Both the dynamical and steady-state behavior of the examined boost converter performed better than the reference system. The steady-state error of the output voltage is almost eliminated, while the dynamical error decreased to 5% in comparison to the two-loop controller.

Open Access: Yes

DOI: 10.3390/electronics12010057

Extending the Input and Transformation Space of Different TP Models: An LMI-based Feasibility Analysis

Miklós Kuczmann Andrea Weber P. Baranyi

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2023-01-01

Volume: 20

Issue: 9

Page Range: 257-276

Description:

This paper discusses that the selection and modification of the input and the transformation space, of the Tensor Product (TP) model representation, of a given quasi– Linear Parameter Varying (qLPV) state‐space model, has an influence on the feasibility regions of the Linear Matrix Inequality (LMI) based control design techniques. Moreover, three factors affect the feasibility regions of the LMI-based control design: The manipulation of the position of vertices The number of the inputs of the TS fuzzy model representation Modifying the transformation space The proof is based on a complex control design example, where the impact of the above factors can be clearly demonstrated. Furthermore, the paper presents that the maximal and minimal parameter space of the controller depends on factors (i) and (ii). The aim of the feasibility test is to show that there exists a solution for LMIs or not, considering these factors. The example is based on the academic Translational Oscillator with Rotational Actuator (TORA) system. Then, the TP model transformation-based framework is used to vary the input space of the TP model representation. In addition, the paper gives a very decisive conclusion that the design technique may be sensitive for the input space of the TS fuzzy model, hence it is necessary to consider the number of inputs, the transformation space and the gains defined on the inputs when a TP model is generated to achieve the best solution to the control purposes. All in all, this paper investigates the effect of input space modification of the TP model representation of a given qLPV state-space model on the feasibility regions of LMI-based controller design methods.

Open Access: Yes

DOI: 10.12700/APH.20.9.2023.9.15

A Novel Feedback Linearisation Control of Flyback Converter

Miklós Kuczmann Miklos CSIZMADIA

Publication Name: Power Electronics and Drives

Publication Date: 2023-01-01

Volume: 8

Issue: 1

Page Range: 74-83

Description:

This paper presents a novel approach for feedback linearisation in a continuous conduction mode (CCM) of the flyback converter. Due to the unstable zero dynamics, a flyback converter has highly non-linear behaviour. Flyback converters mostly use the indirect (current) control mechanism. In contrast, this paper shows a direct control of the output voltage of a flyback converter with feedback linearisation (a non-linear control method). In the designed controller, an error integrator is applied to improve the dynamic and steady-state behaviour of the controller. To design the feedback linearisation method, the state-space averaged model is determined. The converter and the proposed control are tested in a MatLab/Simulink environment, and the results are compared with other optimal controller methods. The results provide feedback about the efficiency and practical implementation of the proposed method.

Open Access: Yes

DOI: 10.2478/pead-2023-0006

Linear-Matrix-Inequality-Based Controller and Observer Design for Induction Machine

Miklós Kuczmann Zoltan Nemeth

Publication Name: Electronics Switzerland

Publication Date: 2022-12-01

Volume: 11

Issue: 23

Page Range: Unknown

Description:

The modeling and drive control of electric machines are still actively researched scientific topics. Most of the existing models contain parameters that have no physical content or cannot be measured at all. For this reason, the use of observers in modern drive control algorithms is necessary. The main goal of this paper is to present the mathematical formalism of a linear matrix inequality (LMI)-based controller-observer design for a tensor product (TP) transformation-based model, including its implementation in a simulation environment. Based solely upon simulation results, the designed observer can provide a stable and accurate state space variable, regardless of the highly nonlinear induction machine model.

Open Access: Yes

DOI: 10.3390/electronics11233894

Applications of periodic structures and metamaterials for antenna design

Miklós Kuczmann Péter Prukner

Publication Name: Acta Technica Jaurinensis

Publication Date: 2022-11-30

Volume: 15

Issue: 4

Page Range: 188-192

Description:

Nowadays, wireless telecommunication is playing an increasing role in almost every field. With the spread of IoT and 5G technologies, all electronic devices will communicate over a network and millions of devices can be connected to each other over such network. Due to this, the number of base stations will also increase significantly. As a result, even more antennas will be installed both indoors and outdoors. It follows that the use of smaller and more compact antennas and simpler and more reliable parameter tuning are of great importance to service providers as well as to equipment manufacturers, both in terms of design and antenna selection. Metamaterials are sub-wavelength structures that act as a homogeneous material to create electromagnetic properties that would not be possible with conventional materials. With the help of today's modern design and manufacturing technologies, it is possible to implement and manufacture such structures. In this article, the theoretical background and application possibilities of periodic structures and materials are presented, followed by the tuning of a split ring resonator and its application on a patch antenna.

Open Access: Yes

DOI: 10.14513/actatechjaur.00669

Robust Design Optimization of Electrical Machines and Devices

Miklós Kuczmann David Pánek Anton Rassõlkin Tamas Orosz

Publication Name: Electronics Switzerland

Publication Date: 2022-05-01

Volume: 11

Issue: 9

Page Range: Unknown

Description:

No description provided

Open Access: Yes

DOI: 10.3390/electronics11091427

TP Transformation Based Controller and Observer Design of the Inverted Pendulum

Miklós Kuczmann Andrea Weber

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2022-01-01

Volume: 98

Issue: 10

Page Range: 34-39

Description:

The paper discusses that applying of CNO and IRNO type weighting functions results different TP models, including controller and observer. Selection of weighting functions has influence on the TP model transformation and the LMI based design. Present paper introduces the LMI based observer and controller design of the inverted pendulum via the TP model transformation based method using CNO and IRNO type weighting functions. The TP transformation is accomplished by qLPV modeling and HOSVD method. The paper gives a conclusion and a comparison of the original and estimated state variables and the impact of applying two types of weighting functions. The aim of present paper is to prove that using different type of weighting functions influences the TP models and LMI methods, but LMIs still result feasible solution for controller and observer design. Furthermore the modification allows to choose the better controller/observer.

Open Access: Yes

DOI: 10.15199/48.2022.10.06

A novel focus logic infused metaheuristic optimization approach based on swarm movement and human eye behavior

Miklós Kuczmann Gergely Friedl

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 93-98

Description:

A novel global optimization method is described in this paper. The proposed metaheuristic approach is loosely based on the previously published technique, the Weighted Attraction Method. The main idea behind the proposed algorithm is the combination the local searching capabilities of the swarm movement-based metaheuristics and quasi-random global search. The quasi-random search technique applied is a novel concept, described as focus logic. The explosion step of the Weighted Attraction Method is modified in a way, that allows a wider area search preventing the algorithm to stuck at a local minimum point for multiple optimization cycles. The behavior of the proposed approach is similar, as the human eye observes its environment. It focuses on a specific area, while the peripheral vision is still giving information about the surrounding area. The proposed method can be applied to solve problems described by a continuous, moderately smooth objective functions rapidly. An objective function with such parameters can be found in any research field, from antenna design through model parameter identifications to Internet of Digital Reality (IoD) applications. In the first chapter the paper introduces the reader to the field of metaheuristic optimizations. The second chapter presents the detailed algorithmic structure of the proposed approach and describes the parameters that could be used to fine tune the behavior of the optimization process. The last technical chapter shows the performance of the proposed technique through comparing the convergence progress of multiple optimization methods on various test functions.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9986739

TP Transformation Based Observer and Controller Design of 2DoF Aeroelastic Wing Section Model

Miklós Kuczmann Andrea Weber

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 17-22

Description:

This paper presents a Tensor Product (TP) model based observer and controller design via Linear Matrix In-equality (LMI) method of 2DoF aeroelastic wing section model. The transformation is based on the Higher Order Singular Value Decomposition HOSVD methodology and the generated linear time-invariant (LTI) vertex systems describe the nonlinear model. The aim of the paper is to investigate that selecting and varying the transformation space and weighting functions have influence on the feasibility regions of LMI based observer and controller. The paper gives a comparison between the controller and observer performance. The proposed method results globally asymptotically stable system, and the LMI gives feasible solution for the observer and controller design if the transformation space and weighting functions are selected adequately.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9986922

Recommendations on electromagnetic compatibility testing of unmanned aerial vehicles

Miklós Kuczmann Gergely Friedl Zsombor Petho Mate Liszi György Wersényi

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 39-44

Description:

In this paper several recommendations and considerations on electromagnetic compatibility (EMC) testing of unmanned aerial vehicles (UAV, or drone) are presented. Currently, the standardization of drone EMC measurements is not yet fully established. These products are usually tested according to EN 55032, EN 55024, EN 64000-4-3 and EN 61000-4-8, while the scope of these standards is not UAV specific. The focus of this paper is on the testability of UAV emission and immunity from various aspects. The main goal of this paper is to initiate discussions regarding UAV specific conditions to describe measurement setups, conditions, and limitations suitable to drones. First, the UAV and the test environment shall be prepared from safety ant testability point of view. These aspects and recommended conditions - e.g., drone fastening, applying artificial load, and emulating the Earth's magnetic field - are explained in this paper. While the drones are assembled from CE certified components, the whole product requires a system level validation. The test conditions, limits, and stress levels shall be aligned to the specific environment an UAV might be exposed to. An initiative study aiming to describe the UAV exclusive electromagnetic conditions are also presented here. Additionally, several key aspects for EMC engineering of UAV's are also discussed in this paper, mainly focusing on functionality relevant EMC issues and solutions.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9987138

Tensor product transformation-based modeling of an induction machine

Miklós Kuczmann Zoltan Nemeth

Publication Name: Asian Journal of Control

Publication Date: 2021-05-01

Volume: 23

Issue: 3

Page Range: 1280-1289

Description:

The paper demonstrates a tensor product (TP) model transformation-based framework for an induction machine (IM). The state space model of an IM is highly nonlinear, thus the Takagi–Sugeno (TS) fuzzy model-based quasi-linear parameter-varying (qLPV) representation can be a good alternative approach of machines modeling. The paper presents the basics of IM state space modeling, how the TP transformation can be applied in details. The control of IM is always a pivotal point; hence, options of feedback control are discussed. The main goal of this paper is to present the whole process of IM TP transformation-based modeling including a control system.

Open Access: Yes

DOI: 10.1002/asjc.2468

Study of tensor product model alternatives

Miklós Kuczmann

Publication Name: Asian Journal of Control

Publication Date: 2021-05-01

Volume: 23

Issue: 3

Page Range: 1249-1261

Description:

A tensor product (TP) model has an infinite number of alternatives. These variants can be readily derived by the TP model transformation that can variate the number of fuzzy rules, the number of antecedent and consequent sets and, further, the shape of the antecedent fuzzy sets. The related literature has quite deep analysis that modifying these features of a TP model has a crucial role in further design. The latest variants of the TP model transformation, emerged about a year ago, are capable of variating the input space of a TP model. The goal of this paper is to analyse this recently emerged new feature through the example of the gantry crane state space model.

Open Access: Yes

DOI: 10.1002/asjc.2446

Transformer model identification by artap: A benchmark problem

Miklós Kuczmann Gergely Kovács Attila Szöcs

Publication Name: Periodica Polytechnica Electrical Engineering and Computer Science

Publication Date: 2021-04-27

Volume: 65

Issue: 2

Page Range: 123-130

Description:

The paper presents how Artap can be used for determining the equivalent circuit parameters of a one phase transformer as a benchmark problem. The following unknown parameters of the equivalent circuit are identified: primary resistance and primary leakage reactance, secondary resistance and secondary leakage reactance, finally magnetizing resistance, and magnetizing reactance. The known quantities from measurement are the primary voltage, primary current, power factor, secondary voltage, and the load resistance. Algorithms implemented in Artap are used for determining the transformer parameters and the results are compared with the analytical solution.

Open Access: Yes

DOI: 10.3311/PPee.17606

Design of Feedback Linearization Controllers for Induction Motor Drives by using Stator Reference Frame Models

Miklós Kuczmann Krisztian Horvath

Publication Name: Proceedings 2021 IEEE 19th International Power Electronics and Motion Control Conference Pemc 2021

Publication Date: 2021-04-25

Volume: Unknown

Issue: Unknown

Page Range: 766-773

Description:

The paper presents feedback linearization based nonlinear controller design for induction machine torque and speed control. Two state-space representation have been studied, stator currents and rotor mechanical speed are measured to control the drive. The pole placement technique is applied to design controller and an integral action is appended to reach accurate steady-state behavior and improve robustness. The presented methods are verified and compared by simulations.

Open Access: Yes

DOI: 10.1109/PEMC48073.2021.9432503

Surrogate Model-based Optimization of Electrical Machines in Ārtap Framework

Miklós Kuczmann Tamas Orosz Attila Nyitrai

Publication Name: Proceedings 2021 IEEE 19th International Power Electronics and Motion Control Conference Pemc 2021

Publication Date: 2021-04-25

Volume: Unknown

Issue: Unknown

Page Range: 514-518

Description:

For accurate modeling of electrical machines the solution multiple physical fields simultaneously in 3D is necessary. Therefore, the optimization of these machines is an computationally expensive optimization problem. The novel artificial intelligence methods and surrogate modeling techniques based on hp-adaptive FEM techniques can significantly reduce the computational cost. In case of a cogging torque or a torque ripple calculation, many simulations should be performed to make an accurate estimation of a single quantity. The number of calculations can be reduced by using surrogate modeling techniques. However, the surrogate model-based model's extrema can differ from the original task's optima. This paper presents a surrogate-model based cogging torque minimization of an axial flux permanent magnet synchronous machine. The objective function of this optimization is the cogging torque, the full solution space is explored to examine and show the robustness of the different kind of solutions.

Open Access: Yes

DOI: 10.1109/PEMC48073.2021.9432546

Feedback linearization with integrator of DCDC buck converter taking into account parasitic elements

Miklós Kuczmann Miklos CSIZMADIA

Publication Name: Proceedings 2021 IEEE 19th International Power Electronics and Motion Control Conference Pemc 2021

Publication Date: 2021-04-25

Volume: Unknown

Issue: Unknown

Page Range: 97-101

Description:

This paper presents the feedback linearization based control of DC/DC buck converter, the output voltage controlled. Also, the presence of parasitic elements are not studied in detail in a previous article, therefore the applied state space model are taking into account of those. The high slew rate of the controller cause inrush current during start-up, which have been examined and reduced. The linearized system has been investigated with linear quadratic regulator (LQR) through an example and simulated via Matlab.

Open Access: Yes

DOI: 10.1109/PEMC48073.2021.9432632

Study of the TP transformation via the inverted pendulum example

Miklós Kuczmann Andrea Weber

Publication Name: Acta Technica Jaurinensis

Publication Date: 2021-02-24

Volume: 14

Issue: 1

Page Range: 1-23

Description:

This study decribes the Tensor Product (TP) based model construction through the nonlinear dynamic system of the inverted pendulum. It presents the steps of TP modeling, various weighting functions and the Linear Matrix Inequality (LMI) based approach. LMI control has been used to stabilize the nonlinear system. This study shows the quasi-Linear Parameter-Varying (qLPV) state-space modeling and the Higher-Order Singular Value Decomposition (HOSVD) based TP model transformation. Some research in this issue already exists, but only the furuta, rotary, single and parallel-type double pendulum have been examined. In this paper the TP model transformation of the inverted pendulum is analyzed in terms of stability.

Open Access: Yes

DOI: 10.14513/actatechjaur.00562

Tensor Product Transformation Based Robust Control of Induction Machine

Miklós Kuczmann Zoltan Nemeth

Publication Name: Gpmc 2020 2nd IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2020-11-19

Volume: Unknown

Issue: Unknown

Page Range: 39-44

Description:

The paper presents the tensor product based model of the highly nonlinear induction machine model. The independence of flux and speed state feedback control has been examined with integral action. Robustness of the designed controller has been investigated with applied load torque, additional measurement noise and parameter uncertainties.

Open Access: Yes

DOI: 10.1109/GPMC50267.2020.9333812

TP Transformation of the Inverted Pendulum

Miklós Kuczmann Andrea Weber

Publication Name: Gpmc 2020 2nd IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2020-11-19

Volume: Unknown

Issue: Unknown

Page Range: 13-18

Description:

This paper describes a Tensor Product (TP) based model via the inverted pendulum. Base of the controller designing is used the Linear Matrix Inequality (LMI) in order to stabilize the nonlinear system. This case shows the quasi-Linear Parameter-Varying (qLPV) modeling and the Higher-Order Singular Value Decomposition (HOSVD) based TP transformation.

Open Access: Yes

DOI: 10.1109/GPMC50267.2020.9333815

A virtual environment for testing and evaluation of control algorithms for a line follower robot

Miklós Kuczmann Tamás Budai

Publication Name: Gpmc 2020 2nd IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2020-11-19

Volume: Unknown

Issue: Unknown

Page Range: 53-54

Description:

In this paper we introduce a new virtual test environment realized in MaxWhere which can be used to model and compare different control algorithms for a line follower robot.

Open Access: Yes

DOI: 10.1109/GPMC50267.2020.9333822

Controller design of DC/DC buck converter based on feedback linearization with integrator

Miklós Kuczmann Miklos CSIZMADIA

Publication Name: Gpmc 2020 2nd IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2020-11-19

Volume: Unknown

Issue: Unknown

Page Range: 35-38

Description:

The paper presents the feedback linearization technique of voltage mode DC/DC buck converter. The nonlinear state-space model is presented and has been stabilized by pole placement technique and finally the voltage control of output has been realized by integral control. The designed controller has been simulated by MATLAB. Results are shown that the developed controller has good dynamic and static behavior.

Open Access: Yes

DOI: 10.1109/GPMC50267.2020.9333821

Feedback Linearization Based Induction Machine Control

Miklós Kuczmann

Publication Name: Gpmc 2020 2nd IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2020-11-19

Volume: Unknown

Issue: Unknown

Page Range: 9-12

Description:

The paper presents the feedback linearization based control of induction machines, both the speed control and the torque control. The nonlinear state space model is decoupled into two linear subsystems, and these systems have been stabilized independently by the pole placement technique, finally speed and torque control have been realized by integral control. The block diagram is presented, and some tests have been performed to show the control system behavior.

Open Access: Yes

DOI: 10.1109/GPMC50267.2020.9333810

Design of lqr controller for gan based buck converter

Miklós Kuczmann Miklos CSIZMADIA

Publication Name: Pollack Periodica

Publication Date: 2020-08-01

Volume: 15

Issue: 2

Page Range: 37-48

Description:

This paper presents a design procedure of a switched-mode power converter, the well-known synchronous buck converter: The calculating method, and how to choose the parts of the converter are presented in detail, like the inductor, the capacitor and the semiconductors as well as the design of the state feedback. During the design process the efficiency and the high switching frequency are very important: The switching semiconductors are Gallium Nitride based. Then, a linear-quadratic regulator is designed and applied to the particular case of a buck converter.

Open Access: Yes

DOI: 10.1556/606.2020.15.2.4

State space modeling theory of induction machines

Miklós Kuczmann Zoltan Nemeth

Publication Name: Pollack Periodica

Publication Date: 2020-04-01

Volume: 15

Issue: 1

Page Range: 124-135

Description:

The paper discusses the theoretical background of the state space modeling of induction machines. The main goal is to present the necessary equations of the induction machine and the topic of the state space modeling. Although the induction machine is a highly non-linear system, LPV/qLPV model can be formulated from these equations.

Open Access: Yes

DOI: 10.1556/606.2020.15.1.12

Tensor Product Transformation based Modelling of Induction Machine

Miklós Kuczmann Zoltan Nemeth

Publication Name: Gpmc 2019 1st IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2019-11-01

Volume: Unknown

Issue: Unknown

Page Range: 31-32

Description:

State-space modelling theory is still a current topic of electrical machines in drive control. Induction machines can be described by nonlinear model leading to linear parameter varying (LPV) state-space model. In order to solve the above-mentioned highly nonlinear problem, Tensor Product (TP) transformation has been chosen. Big advantage of TP modelling are the short simulation time in MATLAB and speed controller can be designed easily.

Open Access: Yes

DOI: 10.1109/GPMC48183.2019.9106955

TP-based Control of the Crane Model

Miklós Kuczmann

Publication Name: Gpmc 2019 1st IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2019-11-01

Volume: Unknown

Issue: Unknown

Page Range: 9-12

Description:

Tensor product based model representation is a numerical technique to approximate the behavior of nonlinear systems. Based on the tensor product transformation a linear matrix inequality based controller design scheme can be applied efficiently. This framework is presented in the paper through the model of gantry crane.

Open Access: Yes

DOI: 10.1109/GPMC48183.2019.9106954

State Space Model Based Control in Virtual Laboratory

Miklós Kuczmann P. Baranyi

Publication Name: 10th IEEE International Conference on Cognitive Infocommunications Coginfocom 2019 Proceedings

Publication Date: 2019-10-01

Volume: Unknown

Issue: Unknown

Page Range: 507-510

Description:

Applying virtual laboratories in teaching can improve and complete university lectures. This paper presents four labs that allow engineering students to study and design a pole placement based controller for typical problems: inverted pendulum, Furuta pendulum, crane, ball and beam. The dynamics of the plants, instructions for controller design and test are provided on smartboards of the virtual laboratory. The controller performance can be studied by the model of the real-life application. The mathematical models and controller design are presented as well as the experiences in the virtual laboratory of control engineering.

Open Access: Yes

DOI: 10.1109/CogInfoCom47531.2019.9090003

Linear state space modeling and control teaching in maxwhere virtual laboratory

Miklós Kuczmann Tamás Budai

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2019-01-01

Volume: 16

Issue: 6

Page Range: 27-39

Description:

It is widely known that virtual laboratories can improve and complete university lectures. This paper presents laboratories, that allow engineering students to design a pole placement based controller for typical control problems: inverted pendulum, Furuta pendulum, crane, ball and beam. The dynamics of the plants and instructions for controller design and test are provided on smartboards of the virtual laboratory. The controller can be designed by the help of Octave Online. Finally, the controller performance can be studied by the model of the real-life application. The mathematical models and controller design are presented as well as the experiences in the virtual laboratory of control engineering.

Open Access: Yes

DOI: 10.12700/APH.16.6.2019.6.3

Development of a VR capable virtual laboratory framework

Miklós Kuczmann Tamás Budai

Publication Name: Pollack Periodica

Publication Date: 2018-12-01

Volume: 13

Issue: 3

Page Range: 83-93

Description:

The aim of this paper is to introduce the design steps and implementation details of a system, which combines modern web-technologies and open-source simulation software to create a virtual laboratory framework. In order to validate the functionality of this framework and to demonstrate its capabilities, a classic experiment from the field of control theory was implemented; the inverted pendulum. In this experiment, a simulated controller keeps the rod of the pendulum in an upright position. Users can change different parameters of the model and then test the impact of these changes in a very intuitive and interactive way, by applying force to the pendulum model in 3D and observing the behavior of the controller.

Open Access: Yes

DOI: 10.1556/606.2018.13.3.9

Measuring and the hysteresis characteristics of permanent magnet

Miklós Kuczmann Gergely Kovács

Publication Name: Physica B Condensed Matter

Publication Date: 2018-11-15

Volume: 549

Issue: Unknown

Page Range: 62-68

Description:

Knowledge of the hysteresis characteristics of permanent magnets is one of the focal point of electric motor design. Permanent magnets are widely used in PMSM (Permanent Magnet Synchronous Motor) and BLDC (Brushless DC) motors that can be found in electric vehicles. The paper deals with the implementation of a permanent magnet measurement set-up as well as the finite element simulation of the developed arrangement. The purpose of this work is to realize an accurate model of permanent magnet obtained by measurement parameters.

Open Access: Yes

DOI: 10.1016/j.physb.2017.09.090

Dynamic extension of vector Preisach model

Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2018-11-15

Volume: 549

Issue: Unknown

Page Range: 47-52

Description:

The objective of the present paper is to generalize the vector Preisach hysteresis model to take dynamic effects into account. A comprehensive analysis of the vector behavior has been performed by a single sheet tester with a specimen of round shape. The locus of the magnetic flux density vector has been controlled by a digital measurement set up at different frequency. An inverse vector Preisach hysteresis model has been built up by viscous-type scalar models and an identification procedure has been developed to follow the measured data. Finally, the model has been inserted into a finite element procedure through the fixed point technique to simulate electrical engineering problems.

Open Access: Yes

DOI: 10.1016/j.physb.2017.09.068

Numerical analysis of eddy current field in laminated media

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2018-08-01

Volume: 13

Issue: 2

Page Range: 3-14

Description:

A comprehensive analysis of the finite element method based lamination modeling has been performed and the results are presented in this paper. The simulations are made in two subsequent steps. In the first step, the approximate magnetic field distribution inside the material with linear characteristics is determined assuming a bulk material having anisotropic conductivity and laminates are not taken into account. In the second step, the eddy current field inside the individual laminates is modeled. The boundary conditions of any individual sheets are obtained from the bulk model. The paper presents the advantages and the drawbacks of the applicable potential formulations. Results are compared with the quasi-static electromagnetic field obtained from a reference solution taking account of each laminate.

Open Access: Yes

DOI: 10.1556/606.2018.13.2.1

Measuring and simulating magnetic characteristics using Epstein frame

Miklós Kuczmann Zoltan Nemeth

Publication Name: Pollack Periodica

Publication Date: 2018-08-01

Volume: 13

Issue: 2

Page Range: 15-26

Description:

The paper discusses the standard of the Epstein frame that has been used to measure magnetic characteristics of the core made of material M250-35A supplied by different frequencies between 1-400 Hz. The measuring program has been built in LabVIEW including a control, filter and data save section as well. COMSOL Multiphysics 4.3b has been chosen as simulation environment, in which the Jiles-Atherton hysteresis model has been implemented.

Open Access: Yes

DOI: 10.1556/606.2018.13.2.2

Temperature and frequency dependent preisach model

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2018-01-01

Volume: 94

Issue: 4

Page Range: 5-8

Description:

The present paper deals with a frequency and temperature dependent modeling approach for hysteresis loops of ferromagnetic materials. The model is based on the Preisach model. The frequency dependency is taken into account by the statistical loss theorem, while thermal effects were incorporated by a generalization of the model equation. The model was validated against measurements made on a soft magnetic material. The results of the proposed model were in good agreement with measured data.

Open Access: Yes

DOI: 10.15199/48.2018.04.02

Towards a modern, integrated virtual laboratory system

Miklós Kuczmann Tamás Budai

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2018-01-01

Volume: 15

Issue: 3

Page Range: 191-204

Description:

The aim of this paper is to give an overview on virtual and remote laboratory systems and to evaluate current solutions focusing on feasibility and applicability in higher education. Based on the conclusions of this evaluation, a new set of requirements are established against a modern virtual laboratory system. Finally, an overview of state of the art infocommunication technologies, including cognitive infocommunication are presented, which can help create high user experience in the new virtual laboratory environment.

Open Access: Yes

DOI: 10.12700/APH.15.3.2018.3.11

Design and control for torque ripple reduction of a 3-phase switched reluctance motor

Miklós Kuczmann Dániel Marcsa

Publication Name: Computers and Mathematics with Applications

Publication Date: 2017-07-01

Volume: 74

Issue: 1

Page Range: 89-95

Description:

A major problem in switched reluctance motor is torque ripple, which causes undesirable acoustic noise and vibration. This work focuses on reducing the undesirable torque ripple in 6/4-pole three-phase switched reluctance motor by geometry modification and using control technique. The proposed method combined the specially skewed rotor pole shape with instantaneous torque control with sinusoidal torque sharing function. The results of geometry modification are analysed through the three-dimensional finite element simulation to determine the appropriate skewing angle. The drive performances of conventional and modified motor are compared through the simulations. The effectiveness of the proposed method is also demonstrated and verified by the simulations.

Open Access: Yes

DOI: 10.1016/j.camwa.2017.01.001

Finite element analysis of switched reluctance motor with rotor position based control

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2016-12-01

Volume: 11

Issue: 3

Page Range: 153-164

Description:

This research presents a field-circuit coupled parallel finite element model of a switched reluctance motor embedded in a simple closed loop control system. The parallel numerical model is based on the Schur-complement method coupled with an iterative solver. The used control system is the rotor position based control, which is applied to the FEM model. The results and parallel performance of the voltage driven finite element model are compared with the results from the current driven model. Moreover, the results of the start-up of the loaded motor show why the model accuracy is important in the control loop.

Open Access: Yes

DOI: 10.1556/606.2016.11.3.14

Closed loop voltage control of a solenoid using parallel finite element method

Miklós Kuczmann Dániel Marcsa

Publication Name: COMPEL the International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Publication Date: 2016-07-04

Volume: 35

Issue: 4

Page Range: 1439-1449

Description:

Purpose - The purpose of this paper is to present the importance of model accuracy in closed loop control by the help of parallel finite element model of a voltage-fed solenoid with iron core. Design/methodology/approach - The axisymmetric formulation of the domain decomposition-based circuit-coupled finite element method (FEM) is embedded in a closed loop control system. The control parameters for the proportional-integral (PI) controller were estimated using the step response of the analytical, static and dynamic model of the solenoid. The controller measures the error of the output of the model after each time step and controls the applied voltage to reach the steady state as fast as possible. Findings - The results of the closed loop system simulation show why the model accuracy is important in the stage of the controller design. The FEM offers higher accuracy that the analytic model attained with magnetic circuit theory, because the inductance and resistance variation already take into account in the numerical calculation. Furthermore, parallel FEM incorporating domain decomposition to reduce the increased computation time. Originality/value - A closed loop control with PI controllers is applied for a voltage driven finite element model. The high computation time of the numerical model in the control loop is decreased by the finite element tearing and interconnecting method with direct and iterative solver.

Open Access: Yes

DOI: 10.1108/COMPEL-09-2015-0339

Primal domain decomposition method with direct and iterative solver for circuit-field-torque coupled parallel finite element method to electric machine modelling

Miklós Kuczmann Dániel Marcsa

Publication Name: Advances in Electrical and Electronic Engineering

Publication Date: 2015-12-01

Volume: 13

Issue: 5

Page Range: 458-465

Description:

The analysis and design of electromechanical devices involve the solution of large sparse linear systems, and require therefore high performance algorithms. In this paper, the primal Domain Decomposition Method (DDM) with parallel forward-backward and with parallel Preconditioned Conjugate Gradient (PCG) solvers are introduced in two-dimensional parallel time-stepping finite element formulation to analyze rotating machine considering the electromagnetic field, external circuit and rotor movement. The proposed parallel direct and the iterative solver with two preconditioners are analyzed concerning its computational efficiency and number of iterations of the solver with different preconditioners. Simulation results of a rotating machine is also presented.

Open Access: Yes

DOI: 10.15598/aeee.v13i5.1410

Edge finite element method in case of high frequency simulations

Miklós Kuczmann Gergely Friedl

Publication Name: Pollack Periodica

Publication Date: 2015-10-01

Volume: 10

Issue: 3

Page Range: 59-70

Description:

The paper deals with high frequency simulations with edge finite element method realized with PETSc functions. The weak formulations of the high frequency simulations are derived from Maxwell's equations in frequency domain. To reduce the calculation time, the finite element method was implemented in PETSc environment. The realized simulation environments were validated with simple examples, which analytically can be calculated.

Open Access: Yes

DOI: 10.1556/606.2015.10.3.7

Closed loop control of finite element model in magnetic system

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2015-10-01

Volume: 10

Issue: 3

Page Range: 19-30

Description:

This paper presents an axisymmetric formulation of the circuit-coupled finite element method embedded in closed loop control system. The controller checks the current of the coil of the magnetic system after each time step and controls the applied voltage to reach the steady state faster. The results of the voltage driven finite element model are compared with the results from the analytical model. The control parameters for the proportional-integral-derivative controller were estimated using the step response of the system. Furthermore, the results of the closed loop system simulation show why the model accuracy is important in the controller design.

Open Access: Yes

DOI: 10.1556/606.2015.10.3.4

Parallel edge finite elementmethod to solve eddy current field problems

Miklós Kuczmann Dániel Marcsa

Publication Name: Acta Technica CSAV Ceskoslovensk Akademie Ved

Publication Date: 2015-01-01

Volume: 60

Issue: 3

Page Range: 277-290

Description:

Two non-overlapping domain decomposition methods are presented and compared. They are used for parallelization of the finite element method with edge element approximation. In this case, the methods under investigation are the Schur complement method and the Lagrange multiplier based finite element tearing and interconnecting method, and their solvers. The performance of these methods and solvers is investigated in detail for two-dimensional eddy current field problems as case studies.

Open Access: Yes

DOI: DOI not available

Schur complement method with iterative solver for 2D fieldcircuit coupling finite element problem with movement

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2014-12-01

Volume: 2014

Issue: 12

Page Range: 145-148

Description:

The analysis and design of electromechanical devices involve the solution of large sparse linear systems, and require therefore high performance algorithms. In this paper, the Schur complement method with parallel preconditioned conjugate gradient (PCG) solver is introduced in two-dimensional parallel time-stepping finite element formulation to analyse rotating machine considering the electromagnetic field, external circuit and rotor movement. The proposed parallel solver is analysed concerning its computational efficiency and number of iterations. Simulation results of a rotating machine are also presented.

Open Access: Yes

DOI: 10.12915/pe.2014.12.35

Measurement and simulation of magnetic flux density, a comparative study

Miklós Kuczmann Gergely Friedl

Publication Name: Pollack Periodica

Publication Date: 2014-04-01

Volume: 9

Issue: 1

Page Range: 133-144

Description:

The paper presents a modified version of the T.E.A.M. Problem No. 32 of the Compumag Society. The original problem is a measurement arrangement to study the magnetic flux density distribution inside an EI ferrite core. A finite element simulation of the device in the frame of COMSOL Multiphysics using the A-formulation has been worked out. First, the device has been realized, and a LabVIEW program has been implemented to measure the waveform of the voltage of B-coils. The geometry and the solution of the problem have been implemented in the frame of COMSOL Multiphysics, to calculate magnetic flux density at the points, where B-coils are on the core.

Open Access: Yes

DOI: 10.1556/Pollack.9.2014.1.14

Improvement and application of the viscous-type frequency-dependent preisach model

Miklós Kuczmann Gergely Kovács

Publication Name: IEEE Transactions on Magnetics

Publication Date: 2014-01-01

Volume: 50

Issue: 2

Page Range: 385-388

Description:

Iron parts of electrical machines are made of nonoriented isotropic ferromagnetic materials. The finite element method (FEM) is usually applied in the numerical field analysis and design of this equipment. The scalar Preisach hysteresis model has been implemented for the simulation of static and dynamic magnetic effects inside the ferromagnetic parts of motors. The dynamic model is an extension of the static one; an extra magnetic field intensity term is added to the output of the static inverse model. This is a viscosity-type dynamic model. The fixed point method with stable scheme has been realized to take frequency-dependent anomalous losses into account in FEM. This scheme can be used efficiently in the frame of any potential formulations of Maxwell's equations. The comparison between measured and simulated data using a toroidal core shows a good agreement. A modified nonlinear version of T.E.A.M. Problem No. 30.a is also shown to test the hysteresis model in the FEM procedure. © 1965-2012 IEEE.

Open Access: Yes

DOI: 10.1109/TMAG.2013.2283398

Dynamic Preisach model identification applying FEM and measured BH curve

Miklós Kuczmann

Publication Name: COMPEL the International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Publication Date: 2014-01-01

Volume: 33

Issue: 6

Page Range: 2043-2052

Description:

Purpose - The purpose of this paper is to develop a viscous-type frequency dependent scalar Preisach hysteresis model and to identify the model using measured data and nonlinear numerical field analysis. The hysteresis model must be fast and well applicable in electromagnetic field simulations. Design/methodology/approach - Iron parts of electrical machines are made of non-oriented isotropic ferromagnetic materials. The finite element method (FEM) is usually applied in the numerical field analysis and design of this equipment. The scalar Preisach hysteresis model has been implemented for the simulation of static and dynamic magnetic effects inside the ferromagnetic parts of different electrical equipment. Findings - The comparison between measured and simulated data using a toroidal core shows a good agreement. A modified nonlinear version of TEAM Problem No. 30.a is also shown to test the hysteresis model in the FEM procedure. Originality/value - The dynamic model is an extension of the static one; an extra magnetic field intensity term is added to the output of the static inverse model. This is a viscosity-type dynamic model. The fixed-point method with stable scheme has been realized to take frequency dependent anomalous losses into account in FEM. This scheme can be used efficiently in the frame of any potential formulations of Maxwell's equations.

Open Access: Yes

DOI: 10.1108/COMPEL-11-2013-0368

Performance study of domain decomposition methods for 2D parallel finite element analysis

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2013-12-01

Volume: 8

Issue: 3

Page Range: 47-58

Description:

The aim of this paper is to give a unified comparison of non-overlapping domain decomposition methods for solving magnetic field problems. The methods under investigation are the Schur complement method and the Lagrange multiplier based finite element tearing and interconnecting method, and their solvers. The performance of these methods has been investigated in detail for two-dimensional magnetic field problems as case studies.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.3.5

Application of PETSC and other useful packages in finite element simulation

Miklós Kuczmann Dániel Marcsa Gergely Kovács György Tomozi Péter Prukner Gergely Friedl Tamás Budai Tamás Unger

Publication Name: Pollack Periodica

Publication Date: 2013-08-01

Volume: 8

Issue: 2

Page Range: 141-148

Description:

In the frame of the project TÁMOP 4.2.2.A, at the Széchenyi István University, the goal is to work out a new finite element package for the simulation and optimization of permanent magnet synchronous motors. These motors are then used to drive new electric cars. The aim of the two dimensional package is the fast numerical modeling of these electric devices by the use of free tools presented in the paper. Of course, the software is aimed to use it in the simulation of other devices, and three dimensional problems, as well.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.2.15

Comparison of the different design software tools for the brushless DC motor designing

Miklós Kuczmann Gergely Kovács

Publication Name: Pollack Periodica

Publication Date: 2013-04-01

Volume: 8

Issue: 1

Page Range: 179-188

Description:

The paper presents simulation results of a two-dimensional permanent magnet synchronous motor, which were calculated by the help of the Infolytica MotorSolve and of the COMSOL Multiphysics, as well. The simulation results were compared with each other focusing on the torque, the magnetic flux density and the magnetic potential of the permanent magnet synchronous motor.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.1.16

Calculation of magnetic component of wire antenna electromagnetic field

Miklós Kuczmann Yurii Branspiz Mykhaylo Zagirnyak

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2013-03-27

Volume: 89

Issue: 2 B

Page Range: 21-24

Description:

The possibility of analytical solution to calculation of azimuthal component of magnetic field intensity of wire antenna simulated by shortcircuit current is demonstrated. For this purpose boundary condition on a cylindrical surface corresponding to the antenna surface presented by Fourier series is proposed.

Open Access: Yes

DOI: DOI not available

Parallel solution of electrostatic and static magnetic field problems by domain decomposition method

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2013-01-01

Volume: 89

Issue: 2 B

Page Range: 49-52

Description:

The paper presents a parallel approach for the efficient solution of a one-dimensional and a two-dimensional problem by parallel finite element method. These problems are case studies. The non-overlapping domain decomposition method has been used to cut the problem into subregions or also called sub-domains, and it reduces the large mass matrix into smaller parts. The independent sub-domains, and the assembling of these equation systems can be handled by the independent processors of a supercomputer, i.e. in a parallel way. The execution time and speedup of parallel finite element method have been compared to the serial one.

Open Access: Yes

DOI: DOI not available

Fractal based wire antenna impedance simulation by the method of moments

Miklós Kuczmann Zoltán Pólik

Publication Name: Pollack Periodica

Publication Date: 2012-07-01

Volume: 7

Issue: 2

Page Range: 69-81

Description:

Koch curve based dipole antennas have been built up, have been simulated and measured to examine the reachable size reduction.The simulations have been performed by the method of moments (MoM) and the results have been checked by the finite element method (FEM) and by measurements. The Pocklington' integral equation has been implemented in MATLAB environment to simulate the input impedance of dipole antennas. The ATW EFIE method has been implemented and solved by the 4NEC2 software to examine the behavior of arbitrary shaped thin wire antennas. In COMSOL Multiphysics software environment a finite element model has been set up to solve the Helmholtz equation and to simulate the antennas under examination. Koch curve based dipole antennas have been measured in a full anechoic chamber, as well and finally the numerical and the experimental results have been compared.

Open Access: Yes

DOI: 10.1556/Pollack.7.2012.2.6

Parallel solution of an electrostatic field problem-case study

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2012-07-01

Volume: 7

Issue: 2

Page Range: 25-34

Description:

The paper presents a parallel approach for the efficient solution of a simple 1D Laplace-Poisson equation problem by parallel finite element method. This problem is a case study. The non-overlapping domain decomposition method has been used to cut the problem into sub-regions or also called sub-domains, and it reduces the large mass matrix into smaller parts. The independent subdomains, and the assembling of these equation systems can be handled by the independent processors of a supercomputer, i.e. in a parallel way. The results of parallel finite element method have been compared to the results of serial finite element method as well as the analytical results.

Open Access: Yes

DOI: 10.1556/Pollack.7.2012.2.2

Comparison of domain decomposition methods for elliptic partial differential problems with unstructured meshes

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2012-01-01

Volume: 88

Issue: 12 B

Page Range: 1-4

Description:

The paper presents the parallelisation of sequential (single-processor) finite element simulations with the use of domain decomposition methods. These domain decomposition methods are the Schur complement method and the Finite Element Tearing and Interconnecting (FETI) method. The execution time and speedup of these parallel finite element methods have been compared to each other and to the sequential one.

Open Access: Yes

DOI: DOI not available

Parallel finite element method

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-12-07

Volume: 87

Issue: 12 B

Page Range: 100-102

Description:

The paper presents the domain decomposition method as a tool to cut the finite element mesh into smaller sub-meshes. Smaller mass matrices can be assembled and solved in a parallel way, i.e. the solution time can be decreased by this method. The finite element method has been chosen as a numerical tool to present the applicability of the technique.

Open Access: Yes

DOI: DOI not available

Modeling of radial magnetic bearing by finite element method

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2011-08-01

Volume: 6

Issue: 2

Page Range: 13-24

Description:

The paper presents the numerical modeling of a Y-shaped three-pole radial magnetic bearing based on two-dimensional (2D) and three-dimensional (3D) magnetic field computation with nonlinear model of the material. The used numerical method is the Finite Element Method (FEM). The nonlinear system of equations according to the nonlinear characteristics of ferromagnetic material can be handled by the Newton-Raphson technique and by the fixed-point method.

Open Access: Yes

DOI: 10.1556/Pollack.6.2011.2.2

Sensitivity calculation of LF RFID transponder coil by the mutual effective permeability method

Miklós Kuczmann Peter Csurgai

Publication Name: Pollack Periodica

Publication Date: 2011-08-01

Volume: 6

Issue: 2

Page Range: 3-12

Description:

Sensitivity is the most important parameter of the Transponder coils from the performance point of view. Due to the open magnetic circuit constructions analytic formulas are not available and not applicable to calculate the sensitivity. Analogically to the self-inductance effective permeability a similar effective permeability can be introduced for the mutual inductance, as well. The presented sensitivity calculation method is based on the mutual effective permeability. By the presented method, the sensitivity of inductors with arbitrary shape and permeability materials can be calculated with good accuracy.

Open Access: Yes

DOI: 10.1556/Pollack.6.2011.2.1

Feeding models of wire antennas

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-04-26

Volume: 87

Issue: 3

Page Range: 107-110

Description:

Antenna parameters (e.g. input impedance, radiation pattern) can be measured in Full Anechoic Chambers (FAC). The simulated input impedance is depending on the applied feed model. The most frequently used models are the current probe model, the voltage gap generator, the magnetic frill generator and the waveguide port which are presented in this paper focusing on a simple example, a monopole antenna situated above a ground plane. The Finite Element Method (FEM) has been used in the numerical field analysis.

Open Access: Yes

DOI: DOI not available

Measurement and simulation of vector hysteresis

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-04-26

Volume: 87

Issue: 3

Page Range: 103-106

Description:

The paper presents a rotational single sheet tester (RSST) which can be used to measure vector hysteresis characteristics inside a specimen with round shape. The measured hysteresis characteristics in the orthogonal directions presents uniaxial anisotropy. It has been handled by the Fourier expansion of the measured Everett functions. The Fourier coefficients of the unknown Everett function have been identified by the modification of a previously implemented algorithm. In the identification task linearly and circularly polarized measured data have been taken into account.

Open Access: Yes

DOI: DOI not available

Parallel computation of arbitrary shaped thin wire antennas

Miklós Kuczmann Géza Hegedus

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-04-26

Volume: 87

Issue: 3

Page Range: 70-72

Description:

An important group of antennas is that one, which antennas have been settled from thin wires. We can build complicated shaped antennas, and complex antenna-systems with these elements. In general case demand of counting of the 3-dimensioned model is too large. Mostly it is true in that case, if we use this one applying fine discretization. For this reason it is important to work out the parallel algorithm, where it is possible. At this work the method of moments has been used for discretization of the equations.

Open Access: Yes

DOI: DOI not available

Vector Preisach hysteresis modeling: Measurement, identification and application

Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2011-04-01

Volume: 406

Issue: 8

Page Range: 1403-1409

Description:

The paper presents a Preisach model to simulate the vector hysteresis properties of ferromagnetic materials. The vector behavior has been studied using a single sheet tester with a disk-shaped specimen at low frequency. The locus of the magnetic flux density vector has been controlled by a digital measurement system. An inverse vector Preisach hysteresis model has been developed and identified by applying the measured data. Finally, the inverse model has been inserted into a finite element procedure through the fixed point technique and the reduced magnetic scalar potential formulation to simulate the measurement system. The applicability of the measurement system as well as the developed model has been proven by comparing measured and simulated results. © 2011 Elsevier B.V. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.physb.2011.01.037

Identification of the 2D vector Preisach hysteresis model

Miklós Kuczmann

Publication Name: COMPEL the International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Publication Date: 2011-03-14

Volume: 30

Issue: 2

Page Range: 538-551

Description:

Purpose-The purpose of this paper is to present a Preisach model to simulate the vector hysteresis properties of ferromagnetic materials. Design/methodology/approach-The vector behavior has been studied at low frequency applying a single-sheet tester with a round-shaped specimen, and the locus of the magnetic flux density vector has been controlled by a digital measurement system. An inverse vector Preisach hysteresis model has been developed and identified by using the measured data. Findings-Finally, the inverse model has been inserted into a finite element procedure through the combination of the fixed point technique and the reduced magnetic scalar potential formulation. The developed single-sheet tester measurement system has been simulated. The applicability of the realized measurement system as well as the developed model has been proven by comparing measured and simulated results. Originality/value-The identification technique is original, based on a previous work of the author. © Emerald Group Publishing Limited.

Open Access: Yes

DOI: 10.1108/03321641111101069

Comparison of various high-frequency models of RF chip inductors

Miklós Kuczmann Peter Csurgai

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-01-01

Volume: 87

Issue: 3

Page Range: 25-28

Description:

RF chip inductors are the most widely used inductors. Due to the miniaturization the continuous improvement of the electrical parameters are highly requested. This demand of the improvement makes the accurate electrical model of the inductors essential. The purpose of the paper is to present an evaluation and comparison of the currently available methods for calculating the inductor behaviour in frequency domain using analytic formulas, finite element simulations, and real measurements on market available RF chip inductors.

Open Access: Yes

DOI: DOI not available

Transient analysis module from an object oriented electrical circuit designer application

Miklós Kuczmann Éva Katona

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-01-01

Volume: 87

Issue: 3

Page Range: 89-92

Description:

The paper deals with a software module, developed by the first Author, from a complex electrical circuit designer application. This analysis module presents the transient response of the designed network to the excitation applied to it. The results can be calculated by some different type ordinary differential equation solvers. The most important aim of this part of the research is creating a new algorithm, which the all different type ordinary differential equation solvers can be used with one algorithm.

Open Access: Yes

DOI: DOI not available

Solution of the TEAM workshop problem No. 7 by the finite element method

Miklós Kuczmann Gergely Kovács

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2011-01-01

Volume: 87

Issue: 3

Page Range: 99-102

Description:

This paper presents some potential formulations which can be derived from the "quasi-static" Maxwell's equations. The simulation results of the potential formulations are compared with each others focusing their CPU times and their accuracy - and with the measurement results, as well. The model -which was simulated - the TEAM workshop problem No. 7. The magnetic flux density and the eddy current were shown by the results of the simulation.

Open Access: Yes

DOI: DOI not available

Optimization and finite element analysis of 3-pole magnetic bearing with nonlinear material

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2010-12-20

Volume: 86

Issue: 12

Page Range: 91-94

Description:

This paper deals with the design and numerical simulation of a radial active magnetic bearing. This bearing is a Y-shaped three-pole magnetic bearing fed by two amplifiers. The geometry design is based on the analytical computation and numerical optimization based on nonlinear finite element analysis. The nonlinearity has been handled by the Newton-Raphson method.

Open Access: Yes

DOI: DOI not available

Nonlinearity in the finite element simulations

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2010-12-20

Volume: 86

Issue: 12

Page Range: 83-86

Description:

The paper presents the four possible nonlinear schemes to solve nonlinear static magnetic field problems and eddy current field problems by the fixed point technique while using the polarization formulation to linearize the nonlinear curve of the constitutive law of ferromagnetic materials. The finite element method (FEM) has been chosen as a numerical tool to present the applicability of the technique.

Open Access: Yes

DOI: DOI not available

Simulation of uniaxial anisotropy by vector Preisach model

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2010-08-01

Volume: 5

Issue: 2

Page Range: 97-106

Description:

The paper presents a rotational single sheet tester, which can be used to measure vector hysteresis characteristics using specimen with round shape. The measured hysteresis characteristics in the two orthogonal directions present the uniaxial anisotropy of the material under test, which has been handled by the Fourier expansion of the measured Everett functions. The Fourier coefficients of the unknown vector Everett function have been identified by the modification of a previously implemented algorithm. In the identification task linearly and circularly polarized measured data have been taken into account. Comparisons between measured and simulated data show acceptable results.

Open Access: Yes

DOI: 10.1556/Pollack.5.2010.2.10

Using the Newton-Raphson method in the polarization technique to solve nonlinear static magnetic field problems

Miklós Kuczmann

Publication Name: IEEE Transactions on Magnetics

Publication Date: 2010-03-01

Volume: 46

Issue: 3 PART 2

Page Range: 875-879

Description:

The paper presents and compares three potential formulations to solve nonlinear static magnetic field problems by applying the fixed point technique and the Newton-Raphson scheme. Nonlinear characteristics are handled by the polarization method in both algorithms. The proposed combination of the Newton-Raphson scheme and the polarization formulation results in a very effective nonlinear solver, because only the derivate of the characteristics, i.e., only the permeability or the reluctivity has to be used. Therefore, this method can be used to solve nonlinear problems with hysteresis, and it is faster than the classical fixed point method. © 2010 IEEE.

Open Access: Yes

DOI: 10.1109/TMAG.2009.2034260

Analysis and design of electrical circuits by ANA method

Miklós Kuczmann Éva Katona

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 69-72

Description:

The paper presents a software, which includes the functions available in the other networks and systems, but it gives a user friendly interface. The program, called ANA (Advanced Network Analysis) is to give an easy use for students, engineers and researchers as well.

Open Access: Yes

DOI: DOI not available

Simulation and measurement of magnetic based nondestructive tester

Miklós Kuczmann Gergely Kovács

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 76-79

Description:

The paper presents the analysis of a nondestructive testing equipment under investigation. There are three main parts of the research as well as this paper. The first part shows the present state of the developed nondestructive tester based on the Magnetic Flux Leakage (MFL) method, the second part reviews the simulation and the results, which have been made with the principle of the Finite Element method (FEM). The last part presents the measurement results, which have been performed with the nondestructive tester. In this paper the simulation results with the measurement results have been compared.

Open Access: Yes

DOI: DOI not available

Vector hysteresis measurement and simulation

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 92-95

Description:

The paper presents a Preisach model of hysteresis to simulate the vector hysteresis properties of ferromagnetic materials. The vector behavior has been studied using a single sheet tester with a round shaped specimen at low frequency, and the magnetic flux density vector has been controlled. An inverse vector Preisach hysteresis model has been developed and identified by applying the measured data. Finally, the inverse model has been inserted into a finite element procedure to study numerically the measurement system.

Open Access: Yes

DOI: DOI not available

Nonlinear two-dimensional motional finite element modeling of a Rotational eddy current field problem

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 110-113

Description:

Rotational eddy current field problems with nonlinear effect can be solved by different potential formulations combining motion voltage term. The potential formulations are the motional A^z.ast; - A - potential formulation and the motional T,φ - φ - potential formulation taking the nonlinearity of the material into account. The nonlinearity has been handled by the fixed point iteration technique (FPT). The paper presents and compares these formulations through the modified version of TEAM Problem No. 30a, which contains two induction motors.

Open Access: Yes

DOI: DOI not available

Identification of dynamic hysteresis model

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 88-91

Description:

The paper presents a measurement system which can be used to prepare measured data to identify the Preisach hysteresis model. The identification is based on the Everett function. A fast and memory efficient realization of the model will be shown which is very useful in numerical field analysis techniques. The dynamic extension of the static model is based on the loss separation formula, and the measured excess magnetic field has been approximated by a feed-forward type neural network. The developed model has been inserted into a finite element procedure.

Open Access: Yes

DOI: DOI not available

Potential formulations for solving TEAM problem 27

Miklós Kuczmann Zoltán Pólik

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 137-140

Description:

This paper presents a study of using two potential formulations-the A ^z.ast;-A formulation, and the T, Φ - Φ formulation-to solve the TEAM problem No. 27 (Eddy Current NDT and Deep Flaws). A procedure to determine arbitrary periodic excitation signal by using Fourier series will also be shown. The numerical results are compared with the experimental waveforms. The goal of this work is to find the more precise and the faster formulation and to approximate the response of a linear electromagnetic system, when the excitation is a periodic signal.

Open Access: Yes

DOI: DOI not available

Direct preisach hysteresis model for finite element analysis of magnetic fields

Miklós Kuczmann Dániel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 114-117

Description:

This paper deals with the numerical analysis of the Problem No. 32 of the TEAM Workshops. This is a three-limbed ferromagnetic core with pick up coils, which is a test bench for validation of numerical analysis with hysteresis. The numerical procedure is based on the magnetic field computation taking the hysteresis into account. The scalar Preisach model is integrated into a finite element analysis. The hysteretic nonlinearity is handled by the fixed point iterative technique. The results are validated by comparison with the experiments.

Open Access: Yes

DOI: DOI not available

Comparison of the A*-A and T φ-phi; Formulations for the 2-D analysis of solid-rotor induction machines

Miklós Kuczmann Dániel Marcsa

Publication Name: IEEE Transactions on Magnetics

Publication Date: 2009-09-01

Volume: 45

Issue: 9

Page Range: 3329-3333

Description:

We present two eddy-current field potential formulations to solve rotating electrical machine problems by applying the finite-element method (FEM) using the motional ${\mbi A}^{*}{-}{\mbi A}$-potential formulation and the motional ${\mbi T}, {\bf \Phi}{-}{\bf \Phi}$-potential formulation. We use the single-phase and three-phase solid-rotor induction motors of Problem No. 30a of TEAM Workshops to compare the potential formulations. We have solved both problems in the time domain and the frequency domain. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/TMAG.2009.2022328

Finite element simulation and development of a radio frequency inductor

Miklós Kuczmann Zoltán Pólik

Publication Name: Pollack Periodica

Publication Date: 2009-08-01

Volume: 4

Issue: 2

Page Range: 25-36

Description:

The design of inductors is not an easy and cheap task considering the dimensions, the nominal value of inductance, the quality factor and the impedance of the component. Before the beginning of manufacturing a new type of inductors, a lot of trial components have to produce, have to measure and have to try out. Finite element modeling is a well-tried process to examine engineering products before manufacturing them. To reduce the cost and the time of the design process, in the paper a finite element model has been built up to simulate inductors. In the paper the model is presented, which is able to simulate the important attributes of the component, for example the inductance, the impedance and the quality factor. The comparison of the experimental and the simulated attributes of the inductor will also be shown. By using the built up model the development possibilities of the inductor have been examined through the modification of the winding.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.2.3

Nonlinear finite element method in magnetism

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2009-08-01

Volume: 4

Issue: 2

Page Range: 13-24

Description:

The paper presents and compares three potential formulations to solve nonlinear static magnetic field problems by applying the fixed-point technique and the Newton-Raphson scheme. Nonlinear characteristics have been handled by the polarization method in the two algorithms. The proposed combination of Newton-Raphson scheme and the polarization formulation result in a very effective nonlinear solver, because only the derivate of the characteristics, i.e. only the permeability or the reluctivity has to be used. That is why, this method can be prosperous to solve nonlinear problems with hysteresis, and it is faster than the classical fixed-point method.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.2.2

Simulation of a developed magnetic flux leakage method

Miklós Kuczmann Gergely Kovács

Publication Name: Pollack Periodica

Publication Date: 2009-08-01

Volume: 4

Issue: 2

Page Range: 45-56

Description:

The paper presents the analysis of nondestructive testing equipment under investigation. There are two main parts of the research as well as this paper. The first part shows the present state of the developed nondestructive tester based on the Magnetic Flux Leakage method, the other part reviews the simulation and the results, which have been made with the principle of the Finite Element Method. The aim now is to define the order of magnitude of the magnetic flux density in the positions of the sensor.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.2.5

Motional finite element simulation of a single-phase induction motor

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2009-08-01

Volume: 4

Issue: 2

Page Range: 57-66

Description:

The paper deals with the analysis of the single-phase induction motor of Problem No. 30a of the COMPUMAG TEAM Workshop. The problem has been solved by the motional two-dimensional time-harmonic Finite Element Method (FEM) using different potential formulations, the A , V - A , -potential formulation and the T , Φ - Φ -potential formulation. Here the problem is a linear eddy current field problem.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.2.6

Measurement and simulation of vector hysteresis characteristics

Miklós Kuczmann

Publication Name: IEEE Transactions on Magnetics

Publication Date: 2009-01-01

Volume: 45

Issue: 11

Page Range: 5188-5191

Description:

This paper presents a Preisach model of ferromagnetic hysteresis to simulate the vector hysteresis properties of ferromagnetic materials. Vector behavior has been studied using a single sheet tester with a round shaped specimen at low frequency, and the magnetic flux density vector has been controlled by a digital measurement system. Circular magnetic flux density pattern has been measured. An inverse vector Preisach hysteresis model has been developed and identified by applying the measured data. Finally, the inverse model has been inserted into a finite element procedure through the fixed point technique and the reduced magnetic scalar potential formulation. The applicability of the measurement system as well as the developed model has been proven by comparing measured and simulated results. © 2009 IEEE.

Open Access: Yes

DOI: 10.1109/TMAG.2009.2031072

Examination and development of a radio frequency inductor

Miklós Kuczmann Zoltán Pólik

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2008-12-01

Volume: 84

Issue: 12

Page Range: 230-233

Description:

Nowadays, inductors can be found in almost every electrical and electronic product. These key components are needed to store electrical energy, select frequencies, and protect againist overvoltage and overcurrent. In the case of the inductors, which usually work in the range of radio frequency, the one of the most important attributes is the quality factor. The aim of the project is to increase the Q-factor of an RF SMT inductor and to favour the industrial research and development about inductors by using the finite element method.

Open Access: Yes

DOI: DOI not available

Nodal and edge finite element analysis of eddy current field problems

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2008-12-01

Volume: 84

Issue: 12

Page Range: 194-197

Description:

Eddy current field problems can be solved by different potential formulations based on the "quasi-static" Maxwell's equations. The potential formulations are obtained using a vector potential and a scalar potential, the most widely used techniques are the A, V-A, the T,φ-φformulations and their combinations. Vector potentials can be approximated by nodal or edge finite elements, scalar potentials are approximated by scalar elements. The paper presents and compares these formulations through TEAM Problem No. 7 containing a multiply connected region.

Open Access: Yes

DOI: DOI not available

Nonlinear Simulation of a Magnetic Flux Leakage Measurement System

Miklós Kuczmann Gergely Kovács

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2008-12-01

Volume: 84

Issue: 12

Page Range: 184-187

Description:

The paper presents the building up of a computer controlled measurement system based on National Instruments Data Acquisition card and National Instruments LabVIEW software package. The aim of this research is to detect surface cracks on steels by applying a Magnetic Flux Leakage (MFL) testing method. First, a finite element based procedure has been implemented to analyze the arrangement. One important question is the position of the sensors. Now, eddy currents have been neglected, but the nonlinear characteristics of specimen have been taken into account.

Open Access: Yes

DOI: DOI not available

The polarization method combined with the Newton-Raphson technique in magnetostatic field problems

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2008-12-01

Volume: 84

Issue: 12

Page Range: 198-201

Description:

Nonlinear magnetic field problems can be solved by using the polarization method. After applying the Finite Element Method (FEM), a system of nonlinear equations can be derived, which can only be solved by iterative techniques. The fixed point iteration scheme and the Newton-Raphson technique are the most widely used algorithms to solve nonlinear equations. The first is known as a convergent, but slow algorithm, while the other is a fast solver, which convergence can be critical. This paper presents and compares the two methods.

Open Access: Yes

DOI: DOI not available

Eddy current analysis with nonlinearity

Miklós Kuczmann Dániel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2008-08-01

Volume: 3

Issue: 2

Page Range: 97-109

Description:

The paper deals with an eddy current field problem as a case study. The aim is to find the solution of the problem by the help of the Finite Element Method (FEM), and the T, , potential formulation taking the nonlinearity of the material into account. The effect of nonlinearity has been approximated with an inverse tangent type analytical model. The nonlinearity has been handled by the polarization method coupled with the Fixed-point iteration technique. © 2008 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.3.2008.2.9

Nodal and vector finite elements in static and eddy current field problems

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2008-08-01

Volume: 3

Issue: 2

Page Range: 85-96

Description:

The numerical analysis or design of an arrangement, which require electromagnetic field calculation, can be characterized by the electric and magnetic field intensities and flux densities. For determination of these field quantities in the electromagnetic field, one method is to find the solution of the partial differential equations of the field quantities under prescribed boundary conditions obtained from Maxwell's equations. The Finite Element Method (FEM) is a possible technique to solve partial differential equations, which is based on the weak form of the weighted residual method. The paper presents some potential formulations, which can be used for solving static magnetic field problems and eddy current field problems with the help of FEM. Some examples are also presented at the second part of the paper. © 2008 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.3.2008.2.8

Design of 2D rrsst system by FEM with T, φ-φ Potential formulation

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2008-04-01

Volume: 3

Issue: 1

Page Range: 67-80

Description:

The paper deals with the numerical analysis of a vector hysteresis measurement system, which is now under construction. The measurement set up consists of an induction motor whose rotor has been removed, and its windings have been replaced to a special two phases one, which can generate a homogeneous magnetic field inside the motor. A round shaped specimen can be inserted into the arrangement. The two orthogonal components of the magnetic field intensity and of the magnetic flux density vectors can be measured by H-coils and B-coils, respectively. The Finite Element Method (FEM) with the T, φ-φ potential formulation has been applied in the simulations. The vector hysteresis property of the specimen has been approximated by the isotropic vector Preisach model, finally the nonlinear problem has been solved by the convergent fixed point technique. The aim of the present work is to focus on the design aspects of this kind of measurement system. © 2008 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.3.2008.1.6

Nonlinear finite element simulation for magnetic flux leakage tester

Miklós Kuczmann Gergely Kovács

Publication Name: Pollack Periodica

Publication Date: 2008-04-01

Volume: 3

Issue: 1

Page Range: 81-90

Description:

The paper reports about the building up a computer controlled measurement system based on National Instruments Data Acquisition card and National Instruments LabVIEW software package. The aim of this research is to detect manufactured surface cracks on steels by applying a magnetic flux leakage testing method. First of all, a finite element method based on the procedure to analyze the behavior has been implemented of the measurement system under construction. One important question is the position of the sensors or of the detecting coils. The finite element procedure contains a two dimensional arrangement. First, eddy currents have been neglected, but the nonlinear characteristic of the specimen has been taken into account by a single valued function. In this paper, the developed measurement system, which is partially ready to work, and the nonlinear finite element procedures are presented as well. © 2008 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.3.2008.1.7

Fourier transform and controlling of flux in scalar hysteresis measurement

Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2008-02-01

Volume: 403

Issue: 2-3

Page Range: 410-413

Description:

The paper deals with a possible realization of eliminating the effect of noise in scalar hysteresis measurements. The measured signals have been transformed into the frequency domain, and, after applying digital filter, the spectrums of the filtered signals have been transformed back to the time domain. The proposed technique results in an accurate noise-removal algorithm. The paper illustrates a fast controlling algorithm applying the inverse of the actually measured hysteresis loop, and another proportional one to measure distorted flux pattern. By developing the mentioned algorithms, it aims at the controlling of a more complicated phenomena, i.e. measuring the vector hysteresis characteristics. © 2007 Elsevier B.V. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.physb.2007.08.062

Simulation of a vector hysteresis measurement system taking hysteresis into account by the vector Preisach model

Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2008-02-01

Volume: 403

Issue: 2-3

Page Range: 433-436

Description:

The paper deals with the numerical analysis of a rotational single sheet tester with round-shaped specimen (RRSST) which is now under construction. The measurement setup consists of an induction motor the rotor of which has been removed, and its windings have been replaced to a special two phase one which can generate homogeneous magnetic field inside the motor. The two orthogonal components of the magnetic field intensity and of the magnetic flux density vectors can be measured by H-coils and B-coils, respectively. The Finite Element Method (FEM) with the T, Φ-Φ potential formulation has been applied in the simulations. The vector hysteresis property of the specimen has been approximated by the vector Preisach model. Finally, the nonlinear problem has been solved by the fixed-point technique. The aim of the present work is to focus on the design aspects of this kind of measurement system. © 2007 Elsevier B.V. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.physb.2007.08.068

Scalar hysteresis measurement using FFT

Miklós Kuczmann

Publication Name: Journal of Optoelectronics and Advanced Materials

Publication Date: 2008-01-01

Volume: 10

Issue: 7

Page Range: 1828-1833

Description:

The paper deals with a possible realization of eliminating the effect of noise in scalar hysteresis measurements. The measured signals have been transformed into the frequency domain, and after applying digital filter, the spectrums of the filtered signals have been transformed back to the time domain. The proposed technique results in an accurate noise removal algorithm. The paper illustrates a fast controlling algorithm applying the inverse of the actually measured hysteresis loop, and another proportional one to measure distorted flux pattern. Developing the mentioned algorithms aims the controlling of more complicated phenomena, i.e. measuring the vector hysteresis characteristics.

Open Access: Yes

DOI: DOI not available

Design of active magnetic bearing

Tamás Ludvig Miklós Kuczmann

Publication Name: Journal of Optoelectronics and Advanced Materials

Publication Date: 2008-01-01

Volume: 10

Issue: 7

Page Range: 1834-1836

Description:

The paper deals with the analysis of an Active Magnetic Bearing system by the Finite Element Method and the magnetic vector potential formulation. This work proposes an optimal shape and dimensions of the legs of stator and air gap.

Open Access: Yes

DOI: DOI not available

Analysis of a vector hysteresis measurement system

Miklós Kuczmann

Publication Name: Journal of Optoelectronics and Advanced Materials

Publication Date: 2008-01-01

Volume: 10

Issue: 7

Page Range: 1823-1827

Description:

The paper deals with the numerical analysis of a vector hysteresis measurement system which is now under construction. The measurement set up consists of an induction motor which rotor has been removed, and its windings have been replaced to a special two phase one which can generate homogeneous magnetic field inside the motor. A round shaped specimen can be inserted into the arrangement. The two orthogonal components of the magnetic field intensity and of the magnetic flux density vectors can be measured by H-coils and B-coils, respectively. The Finite Element Method (FEM) with the T, Φ - ΦD potential formulation has been applied in the simulations. The vector hysteresis property of the specimen has been approximated by the vector Preisach model, finally the nonlinear problem has been solved by the convergent fixed point technique. The aim of the present work is to focus on the design aspects of this kind of measurement system.

Open Access: Yes

DOI: DOI not available

Measuring and control the hysteresis loop by using analog and digital integrators

Miklós Kuczmann Zoltán Pólik

Publication Name: Journal of Optoelectronics and Advanced Materials

Publication Date: 2008-01-01

Volume: 10

Issue: 7

Page Range: 1861-1865

Description:

We have managed to build up a computer controlled measurement system applying National Instruments Data Acquisiton card and National lnsturments LabVIEW software package. First, in a previous study, the specimen under test has been simulated by the Jiles-Atherton model of hysteresis, but simulated measurements have been performed using LabVIEW functions. Our main goal now is to control the magnetic flux density measured by using a toroidal shape core with a feedback controller. In this paper, we show the developed procedure which is able to measure the hysteresis characteristics applying analog and digital integrators, and to control the waveform of magnetic flux density determined from the induced voltage of the secondary coil wound on the toroidal shape core. Our experience is that the developed controller is robust. This work is an initial step of the vector hysteresis measurement system.

Open Access: Yes

DOI: DOI not available

Arbitrary flux waveform generation in scalar hysteresis measurement

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2007-12-01

Volume: 2

Issue: 3

Page Range: 3-14

Description:

The aim of the present paper is to show a simple, but well applicable solution to generate arbitrary waveform of magnetic flux density in scalar hysteresis measurements. The paper deals with a possible realization of eliminating the effect of measurement noise as well. First, the measured signals have been transformed into the frequency domain, and after applying digital filter, the spectrum of the filtered signals have been transformed back to the time domain. The proposed technique results in an accurate noise removal algorithm. The paper illustrates a fast controlling algorithm applying the inverse of the actually measured hysteresis loop, and another proportional one to measure any distorted flux pattern. Developing the mentioned algorithms aims the controlling of a more complicated phenomenon, i.e. measuring the vector hysteresis characteristics. © 2007 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.2.2007.3.1

Measuring of the scalar hysteresis characteristic with a controlled flux density using analog and digital integrators

Tamás Ludvig Miklós Kuczmann Zoltán Pólik

Publication Name: Journal of Electrical Engineering

Publication Date: 2007-08-03

Volume: 58

Issue: 4

Page Range: 236-239

Description:

We have managed to build up a computer controlled system using National Instruments Data Acquisition card and National Instruments LabVIEW software package. First, the specimen under test has been simulated by the Jiles-Atherton model, but simulated measurements have been performed using LabVIEW functions. Our main goal now is to control the magnetic flux density during measurement by using a toroidal core with a feedback controller. In this paper, we show the developed procedure which is suitable for measurement of the hysteresis characteristics using analogue and digital integrators, and to control the waveform of the magnetic flux density determined from the induced voltage of the secondary coil wound on a toroidal core. Our experience is that the developed controller is robust. This work is an initial step to the future work on a vector hysteresis measurement system. © 2007 FEI STU.

Open Access: Yes

DOI: DOI not available

Measurement and control of scalar hysteresis characteristics

Miklós Kuczmann Zoltán Pólik

Publication Name: Pollack Periodica

Publication Date: 2007-08-01

Volume: 2

Issue: 2

Page Range: 27-37

Description:

A computer controlled measurement system based on National Instruments Data Acquisiton card and National Insturments Lab VIEW software package has been built. First, the hysteresis characteristics of the tested specimen have been simulated by Jiles-Atherton model, and simulated measurements have been performed using LabVIEW functions. This work is a preliminary study of LabVIEW and the measurement of hysteresis. The main goal is to control the magnetic flux density measured on a toroidal shaped core with a feedback controller. In this paper, the developed procedure, which is able to measure the hysteresis characteristics applying analogue and digital integrators, and to control the waveform of magnetic flux density determined from the voltage induced in the secondary coil wound on the toroidal shaped core is presented. The experience proves that the developed controller is stable and robust. This work is an initial step of the vector hysteresis measurement system. © 2007 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.2.2007.2.3

Numerical analysis of a 2D vector hysteresis measurement system

Miklós Kuczmann

Publication Name: Pollack Periodica

Publication Date: 2007-04-01

Volume: 2

Issue: 1

Page Range: 17-26

Description:

This paper deals with the numerical analysis of a vector hysteresis measurement system, which is under construction in the laboratory. The aim is to build up a single sheet tester with round shaped specimen. The goal of simulations is to find out the main features of the measurement system. The 3D finite element method (FEM) with tetrahedral mesh developed in the laboratory has been applied for investigations of the nonlinear eddy current field problem. The characteristic of the magnetic material has been taken into account by the isotropic vector Preisach model. The nonlinearity has been handled by the polarization method and the nonlinear system of equations has been solved by the fixed-point technique. The first results are presented in this work. © 2007 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.2.2007.1.2

Realization of the Jiles-Atherton hysteresis model applying the LabVIEW and MATLAB software package

Miklós Kuczmann Eszter Sárospataki

Publication Name: Journal of Electrical Engineering

Publication Date: 2006-12-01

Volume: 57

Issue: 8 SUPPL

Page Range: 40-43

Description:

In this paper we will show a procedure developed under MATLAB and LabVIEW software package which is able to simulate the scalar ferromagnetic hysteresis applying the Jiles-Atherton model. The MATLAB realization has been developed to analyze the behaviour of model, the LabVIEW realization has been applied to simulate a toroidal shape core. The measurement system containing the core will be the basis of a controlling algorithm to realize sinusoidal form of the magnetic flux density. © 2006 FEI STU.

Open Access: Yes

DOI: DOI not available

Numerical analysis of a 2D vector hysteresis measurement system under construction

Miklós Kuczmann

Publication Name: Journal of Electrical Engineering

Publication Date: 2006-12-01

Volume: 57

Issue: 8 SUPPL

Page Range: 44-47

Description:

This paper deals with the numerical analysis of a vector hysteresis measurement system which is under construction. The aim is to build up a single sheet tester with round shaped specimen. The goal of simulations is to find out the main features of the measurement system. The 3D finite element method (FEM) with tetrahedral mesh has been applied for investigations of the nonlinear eddy current field problem. The characteristic of the magnetic material has been taken into account by the isotropic vector Preisach model. The nonlinearity has been handled by the polarization method and the nonlinear system of equations has been solved by the fixed point technique. The first results are presented in this work. © 2006 FEI STU.

Open Access: Yes

DOI: DOI not available

Nonlinear simulation of a nondestructive testing measurement system

Amália Iványi Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2006-02-01

Volume: 372

Issue: 1-2

Page Range: 373-377

Description:

A nondestructive testing (NDT) equipment has been fabricated. The description of the measurement set-up with some measured crack signals applying a Hall-type sensor, furthermore, the T,Ψ-Ψ potential formulation of the nonlinear eddy current field problem in the time domain can be found in this paper. The hysteresis characteristic of the material has been simulated by the previously developed neural network (NN) based isotropic vector hysteresis model. The nonlinear system of equations has been solved by the fixed-point iteration scheme via the polarization method. Comparisons between the results of the 3D simulations and the measurements are also presented. © 2005 Elsevier B.V. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.physb.2005.10.115

Anisotropic vector hysteresis model applying Everett function and neural network

Amália Iványi Miklós Kuczmann

Publication Name: Physica B Condensed Matter

Publication Date: 2006-02-01

Volume: 372

Issue: 1-2

Page Range: 138-142

Description:

This paper deals with a simulation technique based on neural networks and an identification method to approximate the behavior of vector hysteresis characteristics of ferromagnetic materials. The identification procedure is based on theoretical measured vector Everett functions using Fourier expansion to deal with angle dependence of the measured scalar Everett functions and of the vector Everett functions in the 2D or in the 3D space. Computing afterwards the theoretical measured vector Everett functions for some given directions, the corresponding hysteresis models are approximated by neural networks and are used to build up the vectorial hysteresis model both in isotropic and anisotropic case. The properties of the anisotropic model has been analyzed and shown in figures. For some examples, the first order reversal curves determined from the vectorial model are compared with the corresponding measured curves that have been used to compute the measured scalar Everett functions being the input for the identification procedure. © 2005 Elsevier B.V. All rights reserved.

Open Access: Yes

DOI: 10.1016/j.physb.2005.10.034

Identification for Remanufacturing of a Synchronous Reluctance Machine Considering the Circular Economy Conditions

Miklós Kuczmann Mihaly Katona Tamas Orosz

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 469-474

Description:

Due to the growing pressure from governmental entities and customers in the European Union, Original Equipment Manufacturers are being pushed to design and manufacture sustainable and environmentally friendly products. A profitable industrial segment is expected to emerge from recycling end-of-life electric machines. This paper aims to identify an experimental synchronous reluctance machine with faulty copper windings to remanufacture the machine. The rewound design aims to achieve similar or improved characteristics and fit the novel requirements of the circular economy. The recyclability of the machine can be significantly increased by changing the copper windings to aluminum-based hairpin windings. The paper shows the geometrical, material, and winding identification plus finite element method-based analysis of the initial machine. The electric machine’s slot-filling factor can be improved using an appropriate aluminum-based hairpin winding design compared to the original, even in the case of standard slots where the sides of the slots are not parallel.

Open Access: Yes

DOI: 10.3303/CET23107079

Analysis of epstein frame by finite element method

Miklós Kuczmann Zoltan Nemeth

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2019-01-01

Volume: 95

Issue: 6

Page Range: 23-26

Description:

An Epstein frame has been built, which is used to measure magnetic properties of different kind of cores. Sinusoidal voltage excitation has been used in a frequency range of 1-400Hz. The measurements have been performed by a computer-controlled measurement system. The building and the measurement process have been published before. The objective of this work is to compare the simulation results performed with the COMSOL Multiphysics build-in modules and some potential formulation. For this work the Jiles-Atherton model has been chosen to prescribe hysteresis phenomena. The model parameters can be obtained by using the measurement results. The frame has been modelled in 2D.

Open Access: Yes

DOI: 10.15199/48.2019.06.05

A multi-purpose virtual laboratory with interactive knowledge integration

Miklós Kuczmann Tamás Budai

Publication Name: 10th IEEE International Conference on Cognitive Infocommunications Coginfocom 2019 Proceedings

Publication Date: 2019-10-01

Volume: Unknown

Issue: Unknown

Page Range: 529-532

Description:

This paper presents the concept of multi-purpose virtual laboratories, a new way to design and utilize 3D virtual learning environments in higher education. The paper introduces the current state of the adoption of new virtual learning environments and proposes a new design methodology in order to improve the quality, user experience and didactic potential of virtual laboratories. To demonstrate the introduced concepts, a practical example is also presented.

Open Access: Yes

DOI: 10.1109/CogInfoCom47531.2019.9089896

Miklós Kuczmann

Publications - 124

Comparison of Outdoor Radiowave Propagation Models for Land Mobile Systems in the 3.6 GHz and 6 GHz Frequency Bands

Metamodel-based Optimization of Anisotropic Rotor Axial Flux Permanent Magnet Synchronous Motors

Vehicle Dynamics Measurements with a Unique Measuring System for Trams

Review of DC Motor Modeling and Linear Control: Theory with Laboratory Tests

Laboratory and Numerical Investigation of Pre-Tensioned Reinforced Concrete Railway Sleepers Combined with Plastic Fiber Reinforcement

Tensor Product Alternatives for Nonlinear Field-Oriented Control of Induction Machines

Remanufacturing a Synchronous Reluctance Machine with Aluminum Winding: An Open Benchmark Problem for FEM Analysis

Investigation of System Stability and the Design of a Controller based on the Transfer Function of a Quadcopter’s BLDC Motor

LMI feasibility analysis of 2DOF NATA model

Impact of Coordinate System Selection and Model Observability on Position Sensorless State Estimation of Nonsalient-Pole PMSM

Overview Study of the Applications of Unmanned Aerial Vehicles in the Transportation Sector †

Extending the TPTool MATLAB toolbox with LMI based observer and disturbance rejection design

Accuracy of the robust design analysis for the flux barrier modelling of an interior permanent magnet synchronous motor

Iron Loss Calculation Methods for Numerical Analysis of 3D-Printed Rotating Machines: A Review

Performance analysis of a robust design optimization of a solenoid with different sensitivity metrics

Magnetic equivalent circuit and finite element modelling of anisotropic rotor axial flux permanent magnet synchronous motors with fractional slot distributed winding

Temperature-Dependent Ferromagnetic Loss Approximation of an Induction Machine Stator Core Material Based on Laboratory Test Measurements

A Novel Control Scheme Based on Exact Feedback Linearization Achieving Robust Constant Voltage for Boost Converter

Extending the Input and Transformation Space of Different TP Models: An LMI-based Feasibility Analysis

A Novel Feedback Linearisation Control of Flyback Converter

Linear-Matrix-Inequality-Based Controller and Observer Design for Induction Machine

Applications of periodic structures and metamaterials for antenna design

Robust Design Optimization of Electrical Machines and Devices

TP Transformation Based Controller and Observer Design of the Inverted Pendulum

A novel focus logic infused metaheuristic optimization approach based on swarm movement and human eye behavior

TP Transformation Based Observer and Controller Design of 2DoF Aeroelastic Wing Section Model

Recommendations on electromagnetic compatibility testing of unmanned aerial vehicles

Tensor product transformation-based modeling of an induction machine

Study of tensor product model alternatives

Transformer model identification by artap: A benchmark problem

Design of Feedback Linearization Controllers for Induction Motor Drives by using Stator Reference Frame Models

Surrogate Model-based Optimization of Electrical Machines in Ārtap Framework

Feedback linearization with integrator of DCDC buck converter taking into account parasitic elements

Study of the TP transformation via the inverted pendulum example

Tensor Product Transformation Based Robust Control of Induction Machine

TP Transformation of the Inverted Pendulum

A virtual environment for testing and evaluation of control algorithms for a line follower robot

Controller design of DC/DC buck converter based on feedback linearization with integrator

Feedback Linearization Based Induction Machine Control

Design of lqr controller for gan based buck converter

State space modeling theory of induction machines

Tensor Product Transformation based Modelling of Induction Machine

TP-based Control of the Crane Model

State Space Model Based Control in Virtual Laboratory

Linear state space modeling and control teaching in maxwhere virtual laboratory

Development of a VR capable virtual laboratory framework

Measuring and the hysteresis characteristics of permanent magnet

Dynamic extension of vector Preisach model

Numerical analysis of eddy current field in laminated media

Measuring and simulating magnetic characteristics using Epstein frame

Temperature and frequency dependent preisach model

Towards a modern, integrated virtual laboratory system

Design and control for torque ripple reduction of a 3-phase switched reluctance motor

Finite element analysis of switched reluctance motor with rotor position based control

Closed loop voltage control of a solenoid using parallel finite element method

Primal domain decomposition method with direct and iterative solver for circuit-field-torque coupled parallel finite element method to electric machine modelling

Edge finite element method in case of high frequency simulations

Closed loop control of finite element model in magnetic system

Parallel edge finite elementmethod to solve eddy current field problems

Schur complement method with iterative solver for 2D fieldcircuit coupling finite element problem with movement

Measurement and simulation of magnetic flux density, a comparative study

Improvement and application of the viscous-type frequency-dependent preisach model

Dynamic Preisach model identification applying FEM and measured BH curve

Performance study of domain decomposition methods for 2D parallel finite element analysis

Application of PETSC and other useful packages in finite element simulation

Comparison of the different design software tools for the brushless DC motor designing

Calculation of magnetic component of wire antenna electromagnetic field

Parallel solution of electrostatic and static magnetic field problems by domain decomposition method

Fractal based wire antenna impedance simulation by the method of moments

Parallel solution of an electrostatic field problem-case study

Comparison of domain decomposition methods for elliptic partial differential problems with unstructured meshes

Parallel finite element method

Modeling of radial magnetic bearing by finite element method

Sensitivity calculation of LF RFID transponder coil by the mutual effective permeability method

Feeding models of wire antennas

Measurement and simulation of vector hysteresis

Parallel computation of arbitrary shaped thin wire antennas

Vector Preisach hysteresis modeling: Measurement, identification and application