Switch Design for a High-Speed Switching Semi - Bridgeless Active Rectifier of Inductive Power Transfer Systems Considering Reverse Recovery Phenomenon

This paper proposes a switch design method for a high-speed switching semi-bridgeless active rectifier (SBAR) which is used for the secondary side of an inductive power transfer (IPT) system for electric vehicles (EVs). In addition to the rated voltage and current, two practical design considerations are proposed through analyzing operation modes of SBAR in consideration of reverse recovery phenomenon in a body diode of the switch. Based on the analysis, the requirements of the switch for SBAR are proposed, and three types of switches with different characteristics are compared. In order to design the final switch for SBAR, experiments using a 3.3 kW IPT system prototype are performed while applying the three switches, and the final switch is designed.