85 kHz band 44 kW wireless power transfer system for rapid contactless charging of electric bus

A 44 kW wireless power transfer (WPT) system is being developed for rapid contactless charging in an electric bus in the 85 kHz band, the candidate frequency for a wireless charging system for light-duty vehicles that is currently undergoing standardization. A two-channel WPT system with currents of opposite phase in the two transmit pads of the channels is introduced to reduce radiated emissions to within the Radio Act limits by cancelling the emission from each channel. In this paper, the measured power for the 44 kW WPT system is shown.