RESONANT WIRELESS POWER TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To enable transmission of information from the power receiving side to power transmitting side on a resonant wireless power transmission device that transmits power from a power supply of the power transmitting device to a load of the power receiving device.

SOLUTION: A power receiving device has means of changing load impedance within a predetermined range by turning on and off a switch, and a controller that on-off controls the switch with association of transmission data to be transmitted from the power receiving device to a power transmitting device with the change of the load impedance. The power transmitting device has a demodulator that detects the change of a current or a voltage that occurs in response to change of the load impedance corresponding to the transmission data, and reconstructs the transmission data. The controller of the power receiving device transmits a signal known to the power receiving device and the power transmitting device. The demodulator of the power transmitting device detects the presence or absence of bit inversion from the reconstructed known signal, and outputs the following transmission data after bit inversion when bit inversion is detected.

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