A Modified Push-Pull Topology with Phase-shift Modulation

Abstract

This paper presents a DC-DC converter based on Push-Pull converter configuration. These converter circuits are broadly classified into three categories i.e., Pulse Width Modulated (PWM) current-fed, PWM voltage-fed, and based on single phase-shifted modulation of operation. Later, a push-pull converter based on phase-shifted modulated power transfer is proposed. The steady state switching intervals and power transfer are discussed. The converter is integrated with a generative snubber circuit. This snubber circuit is designed to achieve soft switching of switches resulting in reduces switch stress and increased efficiency. The proposed converter is verified with an experimental prototype of 275 W output.