Power transmission apparatus for wirelessly transmitting ac power switched at a timing based on a corrected clock signal, and method of controlling same

Abstract

A power transmission unitincludes a clock generation circuitthat generates a clock signal, a switch circuitthat switches alternating-current power at a timing based on the clock signal, a power transmission antennathat wirelessly transmits the switched alternating-current power, and a transmission antennathat wirelessly transmits the clock signal. A power reception unitincludes a power reception antennathat receives the power transmitted from the power transmission antenna, a reception antennathat receives the clock signal transmitted from the transmission antenna, and a rectification circuitthat switches the power at a timing based on the received clock signal. A first correction circuitcorrects the phase of the clock signal to reduce a phase shift between a phase of the alternating-current power input from the rectification circuit and a phase of the clock signal input from the rectification circuit.