Constant current charging with dual-phase receiver structure in dynamic wireless charging systems for electric vehicles

Abstract

Wireless dynamic charging is a solution to address the issues of travel distance and charging time for electric vehicles. A constant current charging mode is generally required to maximize energy transfer to the vehicle’s energy storage system in the shortest time. This paper proposes a new method for designing constant current charging with a dual-phase receiver structure in electric vehicles’ wireless dynamic charging system. Specifically, a dual-sided LCC compensation circuit is proposed to achieve constant current charging, while the dual-phase receiver structure reduces current ripple during charging. Simulation and experimental results indicate that the constant current charging mode is achieved with a small deviation of approximately 3.1%.