Title :
A ZVZCS Full-Bridge DC/DC Converter with a Passive Auxiliary Circuit in the Primary Side
Author :
Wuhua Li ; Yanqun Shen ; Yan Deng ; Xiangning He
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
A ZVZCS full-bridge converter with phase-shift control is proposed in this paper. The ZCS condition of the lagging-leg is achieved by using a simple auxiliary circuit, which resets the primary-side current during the freewheeling stage. The ZVZCS operation can reduce the switching losses and the circulating conduction losses. The auxiliary circuit is composed of only a small transformer and two clamp diodes, which is inserted in the primary side of the main transformer. There are neither additional active switches nor resistors in the resetting circuit. A prototype with 1 kW operating at 50 kHz is built in the lab to confirm the effectiveness of the presented converter
Keywords :
DC-DC power convertors; bridge circuits; losses; passive networks; power transformers; switching convertors; zero current switching; zero voltage switching; 1 kW; 50 kHz; ZVZCS full-bridge DC/DC converter; circulating conduction losses reduction; clamp diodes; freewheeling stage; passive auxiliary circuit; phase-shift control; primary-side current; small transformer; switching losses reduction; Clamps; DC-DC power converters; Diodes; Inductors; Magnetic analysis; Switches; Switching circuits; Switching loss; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Conference_Location :
Jeju
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1712116
