Primary-Side Control of a Wireless Power Transfer System with Double-Sided LCC Compensation Topology for Electric Vehicle Battery Charging

In this paper, the primary side control of a Wireless Power Transfer (WPT) system used for battery charging application is presented. This control technique provides load-independent constant voltage (CV) and constant current (CC) during the charging process under zero phase angle (ZPA) condition and at the resonant frequency of the system. The transition between two charging modes is smooth and without the use of any additional switch. Furthermore, the control technique is simple and can be easily built. The theoretical analysis are presented in this paper to provide the proper design procedure for a double-sided LCC compensation circuit. Finally, the simulation results are presented to confirm the validity of the control technique.