Abstract
Electric vehicle (EV) is developing rapidly, whose charging is one big issue. EV wireless charging technology has many advantages like safety, convenience, and automation. However, there are also issues concerning EV wireless charging, one of which is misalignment tolerance along the EV door-to-door direction. In this paper, an EV wireless charging system is proposed by employing a reconfigurable topology with two side-by-side transmitting coils. The system can be switched to Working Mode I where the two transmitting coils are connected in series to simultaneously supply power to the receiver at central positions or Working Mode II where the two transmitting coils constitute the LCCC-S (inductor-capacitor-capacitor-capacitor-series) topology to supply power for the receiver at boundary positions. Under this arrangement, the output power can be smoothed along the door-to-door misalignment. Also, the proposed wireless charging system can tolerate weak couplings without overvoltage or overcurrent issues. Experimental results have validated the proposed wireless charging system.
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