A novel active snubber for high-power boost converters

A technique which improves the performance of the boost converter by reduci ng the reverse-recovery-related losses in the boost switch and rectifier wi th an active snubber that is implemented with a minimum number of component s is presented. This minimum-component-count snubber consists of a snubber inductor, an auxiliary switch, and a rectifier. The proposed technique redu ces the reverse-recovery-related Posses by controlling the turn-off di/dt r ate of the rectifier current with the snubber inductor connected in series with the boost switch and rectifier. The voltage and current stresses of th e components in the proposed active-snubber boost converter are similar to those in its conventional "hard-switched" counterpart.