Development of Low Voltage DC/DC Converter for Electric Vehicle using SiC MOSFET

This paper deals with development of low voltage dc-dc converter (LDC) for electric vehicle. The developed LDC is integrated with inverter for driving the traction motor, and all of power semiconductors are designed using silicon carbide (SiC) MOSFET for increasing the power density and efficiency. In this paper, a design procedure of phase-shifted full bridge converter and are introduced. For verifying of the designed parameters of LDC, the simulation and the experiment are performed using PSIM tools and 5.6kW laboratory prototype, respectively. In the experiments, the maximum efficiency is measured as 94.3% at 70% load condition.