EPE Association: EPE 1993 - 29 - Dialogue Session DS1.5: POWER SUPPLIES: PWM TECHNIQUES, ZVS, ZCS

EPE 1993 - 29 - Dialogue Session DS1.5: POWER SUPPLIES: PWM TECHNIQUES, ZVS, ZCS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1993 - Conference > EPE 1993 - 29 - Dialogue Session DS1.5: POWER SUPPLIES: PWM TECHNIQUES, ZVS, ZCS

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   A PWM Method for Quasi-Resonant Zero-Voltage-Switching Inverter
By Katsunori Taniguchi; Shinji Komiyama; Hisaichi Irie [View]
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Abstract: A new quasi-resonant inverter structured by a minimum number of devices is proposed. The quasi-resonant circuit is used as an interface between dc voltage supply and the conventional voltage source PWM inverter. Therefore, the circuit is required to operate at several times of the carrier frequency for the PWM inverter. The number of commutation can be reduced by the PWM strategy. Increasing the amplitude of the fundamental component included in the output waveform achieves an effective utilization of the dc power supply, reduces the rated capacity of the inverter elements, and decreases the conduction loss of the switching devices. In this paper, a new PWM method suitable for the quasi-resonant PWM inverter is also proposed.

   A Novel Low-loss Switching Method for Converters Using Turn-off Power Switches (IGBTs, GTOs etc.)
By L. L. Erhartt; K. Edelmoser; M. Sedlacek; F. C. Zach [View]
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Abstract: In this paper a novel low-loss commutation circuit for bridge-type converters is presented and analyzed. Experimental measurement results are given. With relatively low effort, soft-switching (zero-voltage zero-current switching) is achieved from no load to full load. Low rms current stress, no voltage stress beyond the DC link voltage and very low switching stress of the additional circuit devices are present. The two auxiliary switches only have to turn on and off a low magnetizing current. No additional limiting and damping circuits, voltage sources and energy return switch mode power supplies are necessary. The design is extremely simple using half-bridge modules. The circuit has been developed for a DC-DC converter, consisting of two IGBT half-bridge modules but moreover it is suited as snubber for IGBTs and GTOs in high power, high frequency converters, UPS and electric drives application.

EPE 1993 - 29 - Dialogue Session DS1.5: POWER SUPPLIES: PWM TECHNIQUES, ZVS, ZCS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1993 - Conference > EPE 1993 - 29 - Dialogue Session DS1.5: POWER SUPPLIES: PWM TECHNIQUES, ZVS, ZCS
	[return to parent folder]

	A PWM Method for Quasi-Resonant Zero-Voltage-Switching Inverter By Katsunori Taniguchi; Shinji Komiyama; Hisaichi Irie	[View] [Download]
Abstract: A new quasi-resonant inverter structured by a minimum number of devices is proposed. The quasi-resonant circuit is used as an interface between dc voltage supply and the conventional voltage source PWM inverter. Therefore, the circuit is required to operate at several times of the carrier frequency for the PWM inverter. The number of commutation can be reduced by the PWM strategy. Increasing the amplitude of the fundamental component included in the output waveform achieves an effective utilization of the dc power supply, reduces the rated capacity of the inverter elements, and decreases the conduction loss of the switching devices. In this paper, a new PWM method suitable for the quasi-resonant PWM inverter is also proposed.

	A Novel Low-loss Switching Method for Converters Using Turn-off Power Switches (IGBTs, GTOs etc.) By L. L. Erhartt; K. Edelmoser; M. Sedlacek; F. C. Zach	[View] [Download]
Abstract: In this paper a novel low-loss commutation circuit for bridge-type converters is presented and analyzed. Experimental measurement results are given. With relatively low effort, soft-switching (zero-voltage zero-current switching) is achieved from no load to full load. Low rms current stress, no voltage stress beyond the DC link voltage and very low switching stress of the additional circuit devices are present. The two auxiliary switches only have to turn on and off a low magnetizing current. No additional limiting and damping circuits, voltage sources and energy return switch mode power supplies are necessary. The design is extremely simple using half-bridge modules. The circuit has been developed for a DC-DC converter, consisting of two IGBT half-bridge modules but moreover it is suited as snubber for IGBTs and GTOs in high power, high frequency converters, UPS and electric drives application.