EPE Association: EPE 1997 â€“ 82: Dialogue Session DS2e: RESONANCE 2

EPE 1997 â€“ 82: Dialogue Session DS2e: RESONANCE 2
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 â€“ 82: Dialogue Session DS2e: RESONANCE 2

   [return to parent folder]

   AN ASYMMETRICAL REACTOR TYPE ZERO CURRENT SWITCHING DC-DC CONVERTER WITH CONSTANT FREQUENCY VOLTAGE CONTROL
By M. Suzuki; Y. Hatanaka; S. Kubota [View]
[Download]

Abstract: This paper describes on asymmetrical reactor type zero current switching DC-DC converter (Asy-RT ZCS CONV) with constant frequency voltage control (CFVC) . In the Asy-RT ZCS CONV, all the switches can be operated with ZCS in CFVC. The principle of ZCS operation using overlapping commutation phenomenon without additional switch is elucidated. The ZCS characteristics such as output voltage regulation and output voltage ripple are investigated based on numerical analysis and experimental results. On the basis of the numerical analysis, the design criterion of the asymmetrical reactor type ZCS DC-DC converter is studied. Moreover, the switching operation in the transient-state is numerically analyzed in comparison with the experiment.

   DIRECT THREE-PHASE "LOW FREQUENCY" TO SINGLE PHASE "HIGH FREQUENCY" CONVERTER WITH SINUSOIDAL LINE CURRENTS
By Cyril Pouet; Florent Andrianoelison; Darius Dedecius [View]
[Download]

Abstract: This paper presents a study about direct three-phase low frequency to single phase high frequency converter topologies. The proposed structure is based on the resonant converter's reversibility. The operation strategies are discussed, tpointing up he ability to work in ZVS mode. Some simulation results illustrate the study.

   A SERIES RESONANT DC/DC CONVERTER OPERATING IN ZVS MODE FROM MAXIMUM POWER TO NO LOAD
By Darius Dedecius; Florent Andrianoelison; Yvon Cheron [View]
[Download]

Abstract: This paper presents a solution to the limited ZVS operating area in the seriesresonant DC/DC converter. The output charaCteristics are plotted to show the effect of the snubber capacitors. The use of an auxiliary circuit to always ensure the soft commutation operation is presented. Few experimental plots, taken from a 10 kW device, illustrate the paper.

   Design Improvement and Experimental Characterization of the Full Bridge, Phase Shift, Zero Voltage Switched DC/DC Converter With Secondary Clamped Inductor
By J. Beirante; B. Borges; S. Valtchev [View]
[Download]

Abstract: This paper presents the analysis, simulation, experimental characterization and design optimization of a full-bridge zero-voltage-switched phase-shift (FB-ZVS-PS) de/de converter with a secondary clamped inductor. This converter operates with a fixed frequency of 250kHz and with an output power of I kW. The converter uses a two windings inductor with the secondary connected to the output by means of two clamping rectifier diodes. It is shown that by proper design of the inductor parameters (Lcm and ne), the efficiency, the ZVS range and the effective duty-cycle can be optimized, without significant overall penalties.

   A SELF-RESONANT-PWM BOOST CONVERTER WITH UNITY POWER FACTOR OPERATION BY USING A BANG-BANG CURRENT CONTROL STRATEGY WlTH FIXED SWITCHING FREQUENCY
By R. TOFFANO JR; C. H. G. TREVISO; V. J. FARIAS; J. B. VIEIRA JR; L. C. DE FREITAS [View]
[Download]

Abstract: A Boost Converter operating with high power factor and without commutation losses is presented in this paper. The almost unity power factor operation is obtained by using a bang-bang hysteresis current waveshaping technique with fixed switching frequency. A Self-Resonant PWM auxiliary circuit is incorporated in the hard Boost converter and a lossless commutation is performed. The operational characteristics of the converter are verified by simulation and experimentally on a laboratory prototype.

   APPLICATION OF THE AC LINK IN POWER CONVERSION SYSTEMS
By A. Bogdan; T. Citko [View]
[Download]

Abstract: Operation: and method of control of the AC lin:k used in power conversion system is presented in the article. This system joins AC and DC source and load. Particularly, there are discussed possibility of the nondisturbed oscillation of the AC resonant circuit and the converters devices switching with zero voltage. Touched problems are confirmed by the results of the laboratory model investigations.

   IMPROVEMENT OF PERFORMANCE OF FOUR QUADRANT CONVERTER USING UNIDIRECTIONAL DC LINK INDUCTOR
By B. Dobrucky; J. Kyyra; V. Racek; M. Hukel; J. Dubovsky [View]
[Download]

Abstract: The paper deals with state-space analysis of bidirectional pulse-width-modulation (PWM) rectifier which is widely used mainly in single-phase electric traction as four quadrant (4Q) drive. The new original contribution consist of connection of direct current (DC) link smoothing inductor which is operating with unidirectional pulsed current. Advantages of a such connection is smaller ripple of net current at fixed switching frequency or lower switching frequency at constant ripple. On the other hand the inductor has to be connected via singlephase bridge rectifier. Consequently the power losses of powerswitching elements will be substantially decreased.

EPE 1997 â€“ 82: Dialogue Session DS2e: RESONANCE 2
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 â€“ 82: Dialogue Session DS2e: RESONANCE 2
	[return to parent folder]

	AN ASYMMETRICAL REACTOR TYPE ZERO CURRENT SWITCHING DC-DC CONVERTER WITH CONSTANT FREQUENCY VOLTAGE CONTROL By M. Suzuki; Y. Hatanaka; S. Kubota	[View] [Download]
Abstract: This paper describes on asymmetrical reactor type zero current switching DC-DC converter (Asy-RT ZCS CONV) with constant frequency voltage control (CFVC) . In the Asy-RT ZCS CONV, all the switches can be operated with ZCS in CFVC. The principle of ZCS operation using overlapping commutation phenomenon without additional switch is elucidated. The ZCS characteristics such as output voltage regulation and output voltage ripple are investigated based on numerical analysis and experimental results. On the basis of the numerical analysis, the design criterion of the asymmetrical reactor type ZCS DC-DC converter is studied. Moreover, the switching operation in the transient-state is numerically analyzed in comparison with the experiment.

	DIRECT THREE-PHASE "LOW FREQUENCY" TO SINGLE PHASE "HIGH FREQUENCY" CONVERTER WITH SINUSOIDAL LINE CURRENTS By Cyril Pouet; Florent Andrianoelison; Darius Dedecius	[View] [Download]
Abstract: This paper presents a study about direct three-phase low frequency to single phase high frequency converter topologies. The proposed structure is based on the resonant converter's reversibility. The operation strategies are discussed, tpointing up he ability to work in ZVS mode. Some simulation results illustrate the study.

	A SERIES RESONANT DC/DC CONVERTER OPERATING IN ZVS MODE FROM MAXIMUM POWER TO NO LOAD By Darius Dedecius; Florent Andrianoelison; Yvon Cheron	[View] [Download]
Abstract: This paper presents a solution to the limited ZVS operating area in the seriesresonant DC/DC converter. The output charaCteristics are plotted to show the effect of the snubber capacitors. The use of an auxiliary circuit to always ensure the soft commutation operation is presented. Few experimental plots, taken from a 10 kW device, illustrate the paper.

	Design Improvement and Experimental Characterization of the Full Bridge, Phase Shift, Zero Voltage Switched DC/DC Converter With Secondary Clamped Inductor By J. Beirante; B. Borges; S. Valtchev	[View] [Download]
Abstract: This paper presents the analysis, simulation, experimental characterization and design optimization of a full-bridge zero-voltage-switched phase-shift (FB-ZVS-PS) de/de converter with a secondary clamped inductor. This converter operates with a fixed frequency of 250kHz and with an output power of I kW. The converter uses a two windings inductor with the secondary connected to the output by means of two clamping rectifier diodes. It is shown that by proper design of the inductor parameters (Lcm and ne), the efficiency, the ZVS range and the effective duty-cycle can be optimized, without significant overall penalties.

	A SELF-RESONANT-PWM BOOST CONVERTER WITH UNITY POWER FACTOR OPERATION BY USING A BANG-BANG CURRENT CONTROL STRATEGY WlTH FIXED SWITCHING FREQUENCY By R. TOFFANO JR; C. H. G. TREVISO; V. J. FARIAS; J. B. VIEIRA JR; L. C. DE FREITAS	[View] [Download]
Abstract: A Boost Converter operating with high power factor and without commutation losses is presented in this paper. The almost unity power factor operation is obtained by using a bang-bang hysteresis current waveshaping technique with fixed switching frequency. A Self-Resonant PWM auxiliary circuit is incorporated in the hard Boost converter and a lossless commutation is performed. The operational characteristics of the converter are verified by simulation and experimentally on a laboratory prototype.

	APPLICATION OF THE AC LINK IN POWER CONVERSION SYSTEMS By A. Bogdan; T. Citko	[View] [Download]
Abstract: Operation: and method of control of the AC lin:k used in power conversion system is presented in the article. This system joins AC and DC source and load. Particularly, there are discussed possibility of the nondisturbed oscillation of the AC resonant circuit and the converters devices switching with zero voltage. Touched problems are confirmed by the results of the laboratory model investigations.

	IMPROVEMENT OF PERFORMANCE OF FOUR QUADRANT CONVERTER USING UNIDIRECTIONAL DC LINK INDUCTOR By B. Dobrucky; J. Kyyra; V. Racek; M. Hukel; J. Dubovsky	[View] [Download]
Abstract: The paper deals with state-space analysis of bidirectional pulse-width-modulation (PWM) rectifier which is widely used mainly in single-phase electric traction as four quadrant (4Q) drive. The new original contribution consist of connection of direct current (DC) link smoothing inductor which is operating with unidirectional pulsed current. Advantages of a such connection is smaller ripple of net current at fixed switching frequency or lower switching frequency at constant ripple. On the other hand the inductor has to be connected via singlephase bridge rectifier. Consequently the power losses of powerswitching elements will be substantially decreased.