에너지 재생 수동 스너버를 적용한 고효율, 고역률 AC/DC Boost 컨버터에 관한 연구

A Study on the High-Efficiency, High-Power-Factor AC/DC Boost Converter Using a Passive Energy Recovery Snubber

The conception of the passive lossless snubber with the simpler is presented. Thus a necessity condition of the passive lossless soft switching converter with the simplest topology is directed. A novel passive regenerative snubber called soft snubber applied to a hard switching converter is proposed. The passive snubber consists of a snubber inductor, two snubber rectifiers, and a snubber capacitor. The losses are reduced by inserting a snubber inductor in the series path of the rectifier during it's turn off. It is so simple that can make energy reset or capacitor discharged directly without producing any current circulation. To show the superiority of this converter is verified through the experiment with a 640W, 100kHz prototype converter.