Design and Implementation of a Dual-Switch Forward Converter with Power-Factor-Correction and Synchronous Rectification

• Main Authors: Chih-Wei Li, 李智緯
• Other Authors: Tsu-Hua Ai
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/80020283266386973624

碩士 === 義守大學 === 電機工程學系碩士班 === 95 === A dual-switch forward converter with power-factor-correction and synchronous rectification is proposed in this dissertation. The dual-switch forward converter has the characteristic of lower voltage stress of switches than that of the traditional forward converter. So, it is suitable for high input voltage application. Furthermore, to further increase the efficiency of the converter, the synchronous rectification has been studied and applied in this proposed converter. To obtain a high power factor, a boost topology operated at constant frequency with average current control mode is built in the proposed circuit. Before verification with experiments, IsSpice is used to simulate the operation of dual-switch forward converter. As a result, a 12V/25A output prototype is built, the measured efficiency of PFC stage is up to 97.2% under AC 265V input, and the overall efficiency is 88.7%.