Quasi-resonant converter with divided resonant capacitor on primary and secondary side

Author

Shiroyama, Hironobu ; Matsuo, Hirofumi ; Ishizuka, Yoichi

Author_Institution

Fuji Electr. Device Technol. Co., Ltd., Nagano, Japan

fYear

2009

fDate

18-22 Oct. 2009

Firstpage

1

Lastpage

6

Abstract

This paper presents a quasi-resonant converter with divided resonant capacitor on primary and secondary side of the isolation transformer. A conventional quasi-resonant converter using flyback topology can realize soft switching with simple circuit. However, relatively large surge voltage is generated in the switching device. To suppress such surge voltage, resonant capacitor is divided on primary side and secondary side in the proposed converter. In case of prototype 95 W converter, the voltage applied to switching device of proposed converter has been 26% lower than that of conventional converter. In addition, efficiency of proposed converter has been 1% higher than that of conventional converter.

Keywords

power capacitors; power convertors; power transformers; divided resonant capacitor; flyback topology; isolation transformer; power 95 W; quasi-resonant converter; soft switching; Circuit topology; Equivalent circuits; Isolation technology; Power supplies; Resonance; Surges; Switched capacitor circuits; Switching circuits; Switching converters; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 2009. INTELEC 2009. 31st International

Conference_Location

Incheon

Print_ISBN

978-1-4244-2490-0

Electronic_ISBN

978-1-4244-2491-7

Type

conf

DOI

10.1109/INTLEC.2009.5351842

Filename

5351842