Title :
An improved ZVZCS PWM FB DC/DC converter using the modified energy recovery snubber
Author :
Kim, Eun-Soo ; Joe, Kee-yeon ; Park, Soon-Gu ; Kim, Yoon-Ho
Author_Institution :
P.E. Div., Korea Electrotechnol. Res. Inst., Kyung Nam, South Korea
fDate :
6/22/1905 12:00:00 AM
Abstract :
The conventional high frequency phase-shifted full bridge DC/DC converter has a disadvantage that a circulating current flows through 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 that problem, the paper proposes a circulating current free type high frequency soft switching phase-shifted full bridge (FB) DC/DC converter with the modified energy recovery snubber (ERS) attached at the secondary side of transformer. The modified energy recovery snubber (ERS) adopted in this study consists of four fast recovery diodes and two resonant capacitors
Keywords :
DC-DC power convertors; bridge circuits; capacitors; losses; phase shifters; power semiconductor diodes; snubbers; switching circuits; 120 V; 30 kHz; 58 A; 7 kW; RMS current stress; ZVZCS PWM FB DC/DC converter; circulating current flow; conduction losses; fast recovery diodes; freewheeling interval; full bridge DC/DC converter; high frequency soft-switching DC-DC converter; modified energy recovery snubber; phase-shifted full bridge DC/DC converter; resonant capacitors; switching devices; transformer; Bridges; Capacitors; DC-DC power converters; Diodes; Frequency conversion; Pulse width modulation; Pulse width modulation converters; Resonance; Snubbers; Stress;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5864-3
DOI :
10.1109/APEC.2000.826093
