Title :
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
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;
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
DOI :
10.1109/INTLEC.2009.5351842
