Impedance Shaping Method to Stabilize the LCL-S Compensated Wireless Power Transfer System

The interaction between the resonant wireless power transfer (WPT) component and the DC/DC converter may weaken the system stability, cause overshoot and oscillation in the dynamic process of such WPT system. To suppress the interaction and improve the system dynamic performance, this paper proposes an impedance shaping method for the receiving side DC/DC converter according to the virtual impedance theory. Then, a novel controller is introduced based on dynamic modeling and impedance analysis. Simulation and experiment are designed to verify the ability and performance of the proposed controller.