The ZVS Condition Analysis of a Novel Soft Switching Bidirectional DC/DC Converter

A new soft switching bi-directional DC/DC converter, which can achieve ZVS for all switches in large load range, is introduced in this paper. Besides, the diode reverse recovery is also diminished with zero current switching (ZCS). These measures reduce switching losses, current and voltage stresses and electromagnetic interference (EMI). Operation principle of the proposed converter is described. On the basis of the operational analysis, the characteristic of the voltage and the ZVS condition of the different switches are also analyzed in detail. What's more, the formula of the universal ZVS condition for all the switches is specially deduced. Experimental results obtained from a 500 W prototype are also shown to verify the validity of the universal ZVS condition