An improved ZVZCS PWM FB DC/DC converter using energy recovery snubber

Author

Kim, Eun-Soo ; Joe, Kee-yeon ; Kye, Moon-Ho ; Kim, Yoon-Ho ; Yoon, Byung-Do

Author_Institution

Power Electron. Div., Korea Electrotechnol. Res. Inst., Changwon, South Korea

Volume

2

fYear

1997

fDate

23-27 Feb 1997

Firstpage

1014

Abstract

The conventional high frequency phase-shifted full-bridge DC/DC power converter has a disadvantage that a circulating current flows through the transformer and switching devices during the freewheeling interval. Due to this circulating current, RMS current stress, conduction losses of transformer and switching devices are increased. To alleviate this problem, this paper provides a circulating current free-type high-frequency ZVZCS phase-shifted full bridge (FB) DC/DC power converter with an energy recovery snubber attached at the secondary side of transformer. The energy recovery snubber adopted in this study is consisted of three fast recovery diodes and two resonant capacitors

Keywords

DC-DC power convertors; PWM power convertors; bridge circuits; power semiconductor diodes; power semiconductor switches; power transformers; snubbers; switching circuits; transformer windings; PWM phase-shifted full-bridge DC/DC power converter; RMS current stress; ZCS; ZVS; circulating current flow; conduction losses; energy recovery snubber; fast recovery diodes; freewheeling interval; power transformer secondary; resonant capacitors; Bridges; DC-DC power converters; Diodes; Frequency conversion; Pulse width modulation; Pulse width modulation converters; Resonance; Snubbers; Stress; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3704-2

Type

conf

DOI

10.1109/APEC.1997.575772

Filename

575772