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Found 5152 publications

Resonant flyback converter

Zoltán Puklus

Publication Name: IECON Proceedings Industrial Electronics Conference

Publication Date: 1998-01-01

Volume: 2

Issue: Unknown

Page Range: 1066-1071

Description:

The paper discusses a new converter circuit, the symmetrical resonant flyback converter. The fundamental mathematical analysis is presented, together with simulation results. The switches in the converter operate with ZCS (zero current switching) at turn on and with ZVS (zero voltage switching) at turn off. The second part of the paper gives the mathematical model of the resonant flyback converter discussed, as well as the fundamentals of closed-loop control.

Open Access: Yes

DOI: DOI not available

Resonant flyback converter

No authors available

Publication Name: IECON Proceedings (Industrial Electronics Conference)

Publication Date: 1998-01-01

Volume: 2

Issue:

Page Range: 1066-1071

Description:

The paper discusses a new converter circuit, the symmetrical resonant flyback converter. The fundamental mathematical analysis is presented, together with simulation results. The switches in the converter operate with ZCS (zero current switching) at turn on and with ZVS (zero voltage switching) at turn off. The second part of the paper gives the mathematical model of the resonant flyback converter discussed, as well as the fundamentals of closed-loop control.

Open Access: No

DOI: DOI not available

Contribution to the development of a new type of DC/DC converters

No authors available

Publication Name: IECON Proceedings (Industrial Electronics Conference)

Publication Date: 1997-12-01

Volume: 2

Issue:

Page Range: 581-586

Description:

This paper presents the test results and simplified design method of a new type symmetrical resonant DC/DC converter. The realized converter operates in the frequency range of 30-300 kHz. This paper contributes the theoretical results of the resonant type DC/DC converters and shows the limits of their usage. The simulation results support the theory of the losing converter. The output voltage-current curve (Vo-Io) shows the typical features of the converter operation. This paper also deals with converters working with non ideal resonant circuit.

Open Access: No

DOI: DOI not available

Contribution to the development of a new type of DC/DC converters

Zoltán Puklus Peter Csaba Szilagyi Lászlo Hodossy

Publication Name: IECON Proceedings Industrial Electronics Conference

Publication Date: 1997-12-01

Volume: 2

Issue: Unknown

Page Range: 581-586

Description:

This paper presents the test results and simplified design method of a new type symmetrical resonant DC/DC converter. The realized converter operates in the frequency range of 30-300 kHz. This paper contributes the theoretical results of the resonant type DC/DC converters and shows the limits of their usage. The simulation results support the theory of the losing converter. The output voltage-current curve (Vo-Io) shows the typical features of the converter operation. This paper also deals with converters working with non ideal resonant circuit.

Open Access: Yes

DOI: DOI not available

Analysis and test results of quasi-resonant converters

Zoltán Puklus Peter Korondi Peter Csaba Szilagyi Lászlo Hodossy

Publication Name: Telescon 1997 2nd International Telecommunications Energy Special Conference

Publication Date: 1997-01-01

Volume: Unknown

Issue: Unknown

Page Range: 185-190

Description:

This paper presents the test results and simplified design method of a new type symmetrical resonant DC/DC converter. The realised converter operates in the frequency range of 30-300 kHz. This paper contributes the theoretical results of the resonant type DC/DC converters and shows the hits of their usage. The output voltage-current curve (Uo-Io) shows the typical features of the converter operation.

Open Access: Yes

DOI: 10.1109/TELESC.1997.655714

The generalization of pascal’s triangle from algebraic point of view

No authors available

Publication Name: Annales Mathematicae et Informaticae

Publication Date: 1997-01-01

Volume: 24

Issue:

Page Range: 11-18

Description:

In this paper we generalize Pascal’s Triangle and examine the connections between the generalized triangles and powering integers and polynomials respectively.

Open Access: No

DOI: DOI not available

The generalization of pascal’s triangle from algebraic point of view

Gábor Kallós

Publication Name: Annales Mathematicae Et Informaticae

Publication Date: 1997-01-01

Volume: 24

Issue: Unknown

Page Range: 11-18

Description:

In this paper we generalize Pascal’s Triangle and examine the connections between the generalized triangles and powering integers and polynomials respectively.

Open Access: Yes

DOI: DOI not available

A simple and accurate contactless frequency and amplitude meter

Tolnai László Marczy László

Publication Name: Review of Scientific Instruments

Publication Date: 1997-01-01

Volume: 68

Issue: 2

Page Range: 1303-1306

Description:

This study describes a measuring instrument based on the Michelson interferometer. It is able to measure the amplitude-time function or the resonance curve in a wide frequency range simultaneously depending on the amplitude of the vibration without any kind of mechanical contacts. Compared with other instruments based on similar principles, it has the advantage of not being a heterodyne interferometer, that is of using only the phenomenon of classic interference instead of the frequency of Doppler shift of the reflected light. The reflective surface of the oscillating object or the mirror glued thereon may turn, which is often the case. The software performs a correction to the errors arising from the turning of the mirror. In the realized instrument the allowed maximum angle of rotation of the mirror is ±5°, measuring range of the amplitude is 5 micron to 1 mm, measuring range of the frequency is 1 Hz to 5×104 Hz depending on the amplitude. © 1997 American Institute of Physics.

Open Access: Yes

DOI: 10.1063/1.1147888

Ownership and control in the bus industry: The case of Hungary

John D. Nelson Wafaa Saleh István Prileszky

Publication Name: Journal of Transport Geography

Publication Date: 1997-01-01

Volume: 5

Issue: 2

Page Range: 137-146

Description:

In Hungary, the impending expiry of existing operating licences for both urban and interurban bus services is leading to considerable pressure for change in the current system of ownership and control. Furthermore, the transport sector in Hungary faces several endemic problems. Consequently, this paper analyses the experience of the public transport sector in Hungary with respect to the current situation noting changes after 1990. At the national level, reference is made to both road-based transport (including car ownership and use) and (briefly) to railways. The situation in Budapest is then considered in detail. Next, the structure of the public transport sector in Hungary is discussed both before and after 1990 when the move towards a free market economy received new impetus. The paper examines, as a case-study, the recent experience of private bus operators in Hungary. Finally, drawing on experience elsewhere with possible models for privatization and deregulation in the case of bus operations, suggestions are offered on lessons to be learned by the governments of countries in Central and Eastern Europe as they assess the possibilities for alternative methods of ownership and control. © 1997 Elsevier Science Ltd.

Open Access: Yes

DOI: 10.1016/s0966-6923(97)84102-6