Design and Tuning of LCC Compensation Networks for DD-DDQ Coils in Dynamic Wireless EV Charging Systems

Electric vehicles (EV) are witnessing a growth in the automobile market, serving as a clean and environment friendly transportation system. Nevertheless, the increasing volumes of EVs require an increase in the availability of EV charging infrastructure. Dynamic Wireless Electric Vehicle Charging Systems (DWEVCS) help in addressing these requirements by allowing EVs to be charged wirelessly during their motion. This compensates for the EV energy consumption and helps extend the EV driving range, while allowing a reduction in the size of the EV battery. Nevertheless, charging on-the-move faces certain challenges due to the continuous fluctuations of the mutual coupling as a result of the inevitable misalignments during the EV motion. This mainly impacts the stability of the power received by the EV, particularly with the variation in the EV traveling velocities. To overcome these challenges, this work presents a multi-secondary coil structure with double-sided LCC compensation circuits, to maximize the received power at ±200 mm of lateral misalignment (LTMA) while achieving Zero Phase Angle (ZPA) operation at the resonance frequency. Simulations reveal that the proposed system can deliver 22.5 kW of power to the EV with an efficiency of 90% at a lateral misalignment of ±200 mm.