Development of Multi-Coiled Dynamic Wireless Power Transfer for Electric Vehicle.

A Multi-Coiled Full-Bridge (MCFB) resonant inverter has been proposed for a dynamic wireless charging application, with the design concept and the theoretical analysis discussed. The newly designed dynamic wireless charging system uses Switch-Branched Sharing (SBS), so that the number of power semiconductor devices is reduced. The closed-loop control strategy for MCFB resonant inverter is presented without any communication between the transmitting and receiving side. The study of the optimal conditions to achieve maximum efficiency transfer with respect to resistive load has been investigated. Then, applying the optimal resistive value improves the total efficiency. A 100 W scaled-down prototype MCFB resonant inverter consisting of four transmitting coupler modules and two receiving coupler modules have been implemented. Moreover, the dynamic power transferring has been measured at various speeds. Finally, various experimental tests have been undertaken to confirm the proposed system's feasibility. [ABSTRACT FROM AUTHOR]