Filter-Integrated LCC Compensation for Wireless Charging System

In this paper, filter-integrated LCC compensation is proposed. Since electromagnetic interference (EMI) is one of the issuses of wireless power transfer (WPT) system for electric vehicles (EVs), EMI filters are required for the inverter, which is the source of noise. In this work, a filter-based design of the conventional LCC compensation circuit is first proposed. The compensation circuit of the WPT system operates as a differential mode filter after the cutoff frequency. Second, a method of integrating the EMI filter into the compensation circuit is proposed. The effect of the filter-based LCC compensation circuit was experimentally verified by applying it to the 22kW WPT system..