A hybrid wireless charging system with DDQ pads for dynamic charging of EVs

Abstract

Wireless power transfer (WPT) systems are suitable for applications such as integration of Electric Vehicles (EV) with the utility grids. However, physical misalignments between the magnetic couplers are unavoidable and can introduce variations in self-, leakage- and mutual-inductances, which invariably detune the compensation networks employed by the transmitter and receiver of a wireless power transfer system. A hybrid BD-IPT system, which combines a parallel tuned LCL and a series tuned CL networks to provide a constant power transfer over a wide range of spatial displacements is proposed. A pair of DDQ pads with hybrid tuning is utilized to improve the power transfer to EVs' in a dynamic charging application. Mathematical and simulation models are developed to investigate the behavior of the proposed system under practical operating conditions. Both mathematical and simulation results are presented to illustrate that the proposed system can maintain a relatively constant power to an EV in a dynamic charging system.