CONTACTLESS POWER FEED APPARATUS

A contactless power feed apparatus has a relay circuit relaying power transmitted from a power transmission device to a power reception device in a contactless manner. The power transmission device has: a transmission coil transmitting AC power to the relay circuit The relay circuit has: a first coil electromagnetically coupled with the transmission coil and receiving the AC power from the transmission coil a second coil transmitting the AC power to the power reception device and a resonant capacitor resonating with the AC power supplied to the transmission coil together with the first and second coils The power reception device has: a resonant circuit having a reception coil receiving AC power from the second coil by being electromagnetically coupled with the second coil of the relay circuit