EPE Association: EPE 1989 - 43 - Dialogue Session 3.5: ELECTRONIC POWER SUPPLY SYSTEMS

EPE 1989 - 43 - Dialogue Session 3.5: ELECTRONIC POWER SUPPLY SYSTEMS
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   AN AC/DC CONVERTER USING MOSFETS FOR A 2000 A, 10 V OUTPUT WITH HIGH STABILITY
By K. Fischer; P. Proudlock; B. Alberdi; J. Zabaleta [View]
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Abstract: The special need of CERN for high direct-current (2000 A), low-voltage (10 V) converters to feed superconducting magnets asks for relatively small converter size. Here is described a 20 kHz - switch-mode solution using MOSFETS as switches for the H-bridge PWM inverter and Schottky diodes in the output rectifier. Preliminary studies, the series converter and first experience with this novel converter application are developed.

   LOW FREQUENCY SINEWAVE INVERTER USING FERRITES
By S. R. Narayano Prakash, P. V. Ananda Mohan; B. S. R. lyengar [View]
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Abstract: The paper describes a low frequency sinewave inverter with PWM control and a high frequency link comprised of switching power transistors, fast recovery rectifying diodes, ferrite core transformers and compact resonant filters tuned to the switching frequency. The inverter has minimum switching devices resulting in better reliability and efficiency, it has high power to weight ration, low total harmonic distortion and good output voltage regulation for both input voltage and load current variations. The single phase inverter described in this paper can be used to realise a three phase inverter by suitably connecting three single phase inverters with 120° phase difference between their respective output voltages. A detailed description of the inverter operation and the method of selecting power stage components is given along with experimental results.

   A HIGH TECHNOLOGY BATTERY CHARGING SYSTEM FOR RAILWAY SIGNALLING APPLICATIONS
By R. A. Langley; J. D. Van Wyk; J. J. Schoeman [View]
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Abstract: The paper reports on the development of a high frequency, modular, robust battery charging system developed for application in track-side signalling houses of the Railway System. The small, light weight charger works at ultrasonic frequency, is fed from the 380 V, three phase system, consists of identical 1,5 kW single phase modules with transformer isolation via ferrite transformers, draws sinusoidal supply current and uses a topology for minimising the number of components to increase reliability and reduce production cost. The paper reports on the development and final prototype tests, as well as application conditions.

EPE 1989 - 43 - Dialogue Session 3.5: ELECTRONIC POWER SUPPLY SYSTEMS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 43 - Dialogue Session 3.5: ELECTRONIC POWER SUPPLY SYSTEMS
	[return to parent folder]

	AN AC/DC CONVERTER USING MOSFETS FOR A 2000 A, 10 V OUTPUT WITH HIGH STABILITY By K. Fischer; P. Proudlock; B. Alberdi; J. Zabaleta	[View] [Download]
Abstract: The special need of CERN for high direct-current (2000 A), low-voltage (10 V) converters to feed superconducting magnets asks for relatively small converter size. Here is described a 20 kHz - switch-mode solution using MOSFETS as switches for the H-bridge PWM inverter and Schottky diodes in the output rectifier. Preliminary studies, the series converter and first experience with this novel converter application are developed.

	LOW FREQUENCY SINEWAVE INVERTER USING FERRITES By S. R. Narayano Prakash, P. V. Ananda Mohan; B. S. R. lyengar	[View] [Download]
Abstract: The paper describes a low frequency sinewave inverter with PWM control and a high frequency link comprised of switching power transistors, fast recovery rectifying diodes, ferrite core transformers and compact resonant filters tuned to the switching frequency. The inverter has minimum switching devices resulting in better reliability and efficiency, it has high power to weight ration, low total harmonic distortion and good output voltage regulation for both input voltage and load current variations. The single phase inverter described in this paper can be used to realise a three phase inverter by suitably connecting three single phase inverters with 120° phase difference between their respective output voltages. A detailed description of the inverter operation and the method of selecting power stage components is given along with experimental results.

	A HIGH TECHNOLOGY BATTERY CHARGING SYSTEM FOR RAILWAY SIGNALLING APPLICATIONS By R. A. Langley; J. D. Van Wyk; J. J. Schoeman	[View] [Download]
Abstract: The paper reports on the development of a high frequency, modular, robust battery charging system developed for application in track-side signalling houses of the Railway System. The small, light weight charger works at ultrasonic frequency, is fed from the 380 V, three phase system, consists of identical 1,5 kW single phase modules with transformer isolation via ferrite transformers, draws sinusoidal supply current and uses a topology for minimising the number of components to increase reliability and reduce production cost. The paper reports on the development and final prototype tests, as well as application conditions.