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

fYear

2006

fDate

18-22 June 2006

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE

Conference_Location

Jeju

ISSN

0275-9306

Print_ISBN

0-7803-9716-9

Type

conf

DOI

10.1109/PESC.2006.1712116

Filename

1712116