Patent ID: 8542018

Claim:
A power transmitting apparatus comprising: a first magnetic resonance coil configured to externally transmit power as magnetic field energy through magnetic resonance; a first power transmitting-and-receiving unit configured to supply power to at least the first magnetic resonance coil; a second magnetic resonance coil configured to accept the magnetic field energy through magnetic resonance occurring between the first magnetic resonance coil and the second magnetic resonance coil; a second power transmitting-and-receiving unit configured to accept the power at least with reference to the second magnetic resonance coil; a main power supply; a power supply-management unit configured to select (a) either the power accepted by the second power transmitting-and-receiving unit or power transmitted from the main power supply, and transmit the selected power to the first power transmitting-and-receiving unit, and/or (b) transmit the power accepted by the second power transmitting-and-receiving unit and the power transmitted from the main power supply to the first power transmitting-and-receiving unit in combination; and a power backflow path provided to entirely electrically connect between the second power transmitting-and-receiving unit and the power supply-management unit; wherein the first power transmitting-and-receiving unit receives the power accepted by the second power transmitting-and-receiving unit without the second magnetic resonance coil.