Dániel Marcsa

24781243900

Publications - 20

Numerical Simulation of Coupled Electromagnetic and Thermal Problems in Permanent Magnet Synchronous Machines

A. Lotfi Dániel Marcsa V. Chabannes C. Prudhomme Zoltán Horváth

Publication Name: Lecture Notes in Computational Science and Engineering

Publication Date: 2021-01-01

Volume: 139

Issue: Unknown

Page Range: 693-701

Description:

The main objective of our task is to develop mathematical models, numerical techniques to analyse the thermal effects in electric machines, to implement the developed algorithm in multiprocessor or multi-core environments and to apply them to industrial use cases. In this study, we take into account coupled character of the electromagnetic and thermal features of the physical process. Both thermal and electromagnetic processes are considered transient, solved by means of the FEM method on independent meshes and the time-discretization is realized using time operator splitting. Two examples are presented to assess the accuracy of the developed coupled solvers and the numerical results are compared with the experimental ones, which are obtained from a prototype machine.

Open Access: Yes

DOI: 10.1007/978-3-030-55874-1_68

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

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

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

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

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

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

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

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 Az.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

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

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

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