Title :
An improved three level ZVZCS DC/DC converter using a tapped inductor and a snubber capacitor
Author :
Kim, Eun-Soo ; Byun, Young-Bok ; Koo, Tae-Geun ; Joe, Kye-Yeon ; Kim, Yoon-Ho
Author_Institution :
Dept. of Electr. & Electr. Eng., Jeonju Univ., South Korea
Abstract :
The conventional three-level high frequency phase-shifted 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 and RMS current stress, conduction losses of transformer and switching devices increases. To alleviate these problems, we 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 transformer. The proposed ZVZCS converter is verified on a 7 kW, 30 kHz experimental prototype
Keywords :
DC-DC power convertors; capacitors; inductors; snubbers; switching circuits; 110 V; 30 kHz; 65 A; 7 kW; RMS current stress; circulating current; conduction losses; freewheeling interval; snubber capacitor; snubber diodes; switching devices; tapped inductor; three level ZVZCS DC/DC converter; three-level zero current switching; three-level zero voltage switching; transformer secondary side; Capacitors; DC-DC power converters; Diodes; Frequency conversion; Inductors; Prototypes; Snubbers; Stress; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.998533
