A magnetically coupled regenerative turn-on and turn-off snubber configuration [for boost convertor]

Abstract

This paper presents a magnetically coupled regenerative turn-on and turn-off snubber configuration applied to a boost power converter which operates in the continuous conduction mode (CCM). In addition to reducing the stresses in the switch, providing soft transitions in its turn-off voltage and turn-on current, it transfers the entered stored in the snubber capacitor to the load. This is achieved by using a coupled inductor mounted on the main inductor of the power converter, which resets the capacitor voltage at each switching period. Design equations, as well as experimental results, are presented, showing the high efficiency of the boost power converter by using the proposed snubber.