Title :
A three level ZVZCS phase-shifted DC/DC converter using a tapped inductor and a snubber capacitor
Author :
Kim, Eun-Soo ; Byun, Young-Bok ; Kim, Yoon-No ; Hong, Young-Gun
Author_Institution :
PE Div., Korea Electrotechnol. Res. Inst., Changwon, South Korea
Abstract :
The conventional three-level high frequency phase-shifted DC/DC converter has a disadvantage that a circulating current flows through the transformer and switching devices during the freewheeling interval. Due to this circulating current and RMS current stress, conduction losses of the transformer and switching devices increases. To alleviate these problems, the authors propose an improved three-level zero voltage and zero current switching (ZVZCS) DC/DC converter using a tapped inductor, a snubber capacitor and two snubber diodes attached at the secondary side of the transformer. The proposed ZVZCS converter is verified on a 7 kW, 30 kHz experimental prototype
Keywords :
DC-DC power convertors; power capacitors; power semiconductor diodes; power transformers; snubbers; switching circuits; 30 kHz; 7 kW; RMS current stress; circulating current flow; conduction losses; freewheeling interval; snubber capacitor; snubber diodes; switching devices; tapped inductor; three-level ZVZCS phase-shifted DC/DC converter; transformer; Capacitors; DC-DC power converters; Diodes; Frequency conversion; Inductors; Prototypes; Snubbers; Stress; Zero current switching; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.912486
