Zero Voltage Switching for Boost-Flyback Converter

• Main Authors: Chen-Chi Wei, 陳季緯
• Other Authors: Ching-Lung Chu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/18092841560614159719

碩士 === 南台科技大學 === 電機工程系 === 99 === This study proposed a zero voltage switching for a boost-flyback converter. The circuit topology of the proposed converter is composed of a boost converter and a flyback converter with cascode connection. Leakage inductance and magnetizing inductance are required to charge and discharge the parasitic capacitance of the switch in order to achieve the main switch and auxiliary switch operated at the zero voltage switch. Meanwhile, the auxiliary switch can synchronize rectification and reduce conduction losses. The operating principle and design process of the zero voltage switching for Boost-flyback converter are presented in this thesis. Finally this study developed a prototype cascaded flyback DC/DC converter with an input voltage of 48 V, output voltage of 400 V, and output power of 100 W. The experimental results verified the performance of the proposed cascaded converter.