Design of the Self-Excited and Zero-Voltage-Switched Forward Converter

• Main Authors: Shu, Fu-Chiang, 徐復強
• Other Authors: Li Jung-Chien
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/55435612455383076834

碩士 === 國立海洋大學 === 電機工程學系 === 84 === The operating efficiency of a power supply can be highly promoted due to t-he invention of soft-switching one. There are many works on the subject about how to minimize the loss on the switching moment owing to the promoted operating frequency by achieving zero-voltage or zero-current switching. We suggest a new zero-voltage resonant converter topology which can be usedof the isolation transformer made of saturable core.Thus not only the trigger circuit could be omitted but also a lossless switch could be obtained. In this thesis,we first deduce the waveform equations in time-domain to at-tribute to the steady state analysis.Then by these equations,values of all ele-ments can be obtained,and thus the practical circuits can be put into realizat-ion cuccessively which we make a comparision with theory.