Simulation of 5kw/20khz Soft Switched DC-DC Converter

This paper presents the design and simulation of a Full Bridge Soft Switched DC-DC Converter, working with an internal frequency of 20khz with an output power of 5kw. Since the ZVS range is independent of the switch capacitance, IGBT’S are used by adding the external capacitors to the switches without increasing the switching losses. However, it is not easy to design a hard-switched converter structure using these devices to operate at such high switching frequencies and voltages. Soft-switching strategies offer an attractive alternative, but converter design using these strategies is still quite challenging. Design details, theoretical predictions, and experimental results are presented in this paper for the conversion system that was developed.