A New Configuration and Bypassing Strategy for Dynamic Wireless EV Charging

This paper presents a new dynamic wireless Electric Vehicle (EV) charging topology with a lower number of switches, resonant components, and implementation cost compared to conventional dynamic wireless charger topologies. Conventional dynamic wireless EV chargers require a full-bridge inverter and a resonant network for each transmitter coil. The implementation cost of the conventional dynamic wireless chargers is one of the main barriers to the development of dynamic chargers. In the proposed topology, multiple transmitter coils are supplied by a single inverter and LCC network. Each transmitter side coil will turn on only when the load is detected and other coils are bypassed. Moreover, a new load detection method is proposed in this paper to control the proposed topology. In this method, only the amplitude of the transmitter side coils voltages is used to detect the load which can easily be implemented. Therefore, the implementation cost can be reduced significantly. The proposed circuit is analyzed in detail and simulation results are presented.