A Nonisolated Bidirectional ZVS Converter for Low Power Application

Abstract

In this paper, a new zero voltage switching bidirectional DC-DC converter with low number elements is proposed. The synchronous rectification and soft-switching techniques are adopted to reduce the conduction loss and switching loss respectively. In the proposed converter any auxiliary circuits for providing soft switching conditions are not used, therefore the efficiency can be improved. In this converter the switches are gated with PWM signal and in complementary form, therefore the implementation of control circuit is simple. Since the proposed bidirectional DC-DC converter has only three main components with two snubber capacitors, the power density is very high. Simulation and experimental results verified the theoretical analysis and the efficiency of proposed converter in full load is about 96%.