Title :
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
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;
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
DOI :
10.1109/APEC.1997.575772
