A dynamic wireless charging system for electric vehicles based on DC/AC converters with SiC MOSFET-IGBT switches and resonant gate-drive

Abstract

This paper presents a high-performance dynamic Wireless Power Transfer (WPT) system for electric vehicles, which has high efficiency and the potential for large scale deployment. The detailed single stage 22kW DC/AC converter design of the transmitter side is presented. The converter is connected to a series-series WPT compensated system and has features like hybrid switches with fast 0-Ω gate-drive circuit for the SiC MOSFET and resonant gate-drive circuit for the IGBT, which allows operation without ZVS switching. Experimental results are presented to confirm the correct operation of the converter with two test cases: 1) a DC current imposed through an inductive load for converter efficiency measurements in hard-switching and 2) an AC output current imposed in a full scale static laboratory WPT system, similar to the dynamic one.