Abstract
In recent years, the wireless EV chargers have been spotlighted as convenient, safe, and clean apparatus. In this paper, proposed has been a newly developed large-gap wireless power transfer EV charger which can communicate control signal to a power feeding unit from a power receiving unit without any additional communication equipment. The wireless power transfer (WPT) system with a single-ended push-pull (SEPP) inverter is designed for large-gap loose-coupling condition by a new design strategy based on characteristic-impedance. The power receiving circuit with communication function can modulate a primary coil current in the power feeding unit through inductive power transfer. Described is a design strategy to establish enough communication reliability. Simulated and experimental results of the proposed system operation are discussed herein in a practical point of view.
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