Improved Triple-phase-shift Control for DAB Converter to Minimize Current Stress with All-ZVS Operation Considering Dead-time Effect

Electrical vehicles (EV) may breaks down on the road when they don't have enough energy driving to nearby charging pots. In this paper, an isolated DC/DC converter using dual-active-bridge (DAB) topology is designed for a car to be a portable battery, which can drive where the EV needs and charge it in emergency. Firstly, the actual switching status using optimized Triple-phase-shift (TPS) control is analyzed considering dead-time. The improved TPS control which can realize all- ZVS (Zero Voltage Switch) operation is presented. Finally, a 10- kW prototype is built to verify the enhancement in efficiency.