A Novel Full-Soft-Switching Full-Bridge Converter With a Snubber Circuit And Couple Inductor

In this paper, a novel full-soft-switching full-bridge converter with a snubber circuit and couple inductor is proposed. The proposed converter can realize soft switching for all of the primary switches and rectifier diodes under light load condition because of the snubber circuit. And the snubber circuit can also achieve soft switching for all of its switches and diodes because of the couple inductor. In addition, the complementary symmetry control for primary-side switches is adopted so there is no shortages of duty cycle loss. The simulation and prototype results are presented to validate the proposed converter.