the push - pull converter for zero - voltage switching of the switches on the primary side of the transformer to have a relatively lower loss is proposed . which includes : a transformer having a primary winding with a center tap and a secondary winding , an electrical energy storage device having a first terminal coupled to the center tap of the primary winding and a second terminal coupled to a ground , a first switch having a first terminal coupled to a first terminal of the primary winding and a second terminal coupled to the ground , a second switch having a first terminal coupled to the ground and a second terminal coupled to a second terminal of the primary winding , and a rectifier circuit coupled to the secondary winding for transforming an ac output of the secondary winding to a dc output .