Multiple alternatives of regenerative snubber applied to Sepic and Cuk converters

Abstract

This paper presents several topological alternatives for using a magnetically coupled regenerative turn-on and turn-off snubber configuration applied to the Sepic and Cuk converters operating in continuous conduction mode (CCM). The proposed snubber uses the main core of the DC-DC converter to build the resonant inductor. In addition to reducing the stresses in the switch, providing soft transitions in its turn-off voltage and turn-on current, it transfers the energy stored in the snubber capacitor to the output (load) or input. An analytical study of the converters is presented. Experimental results are shown for a proposed structure.