New Zero Voltage Switching Bidirectional DC-DC Converter with Simple Structure

Abstract

A new zero voltage switching bidirectional DC-DC converter proposes in this paper. In the proposed converter, without adding any auxiliary switches and with a simple snubber, soft switching conditions are created, which simplifies the structure of the converter. The control of the switches in the proposed converter is complementary to each other, so the control circuit of the converter is simple and does not need any extra control circuit. The coupled inductors used in the converter, in addition to controlling the resonant inductor energy, transfer circulating currents to the input or output, which reduces the loss energy in the converter and increases the efficiency. The proposed converter is fully analyzed, and to verify the theoretical analysis, a 300-watt prototype of the converter is implemented and tested, resulting in an efficiency of about 95.5% at full load.