WIRELESS POWER SUPPLY DEVICE AND COIL USAGE METHOD

摘要

The purpose of the present invention is to provide a magnetic-resonance wireless power supply device for maintaining a high efficiency of power transmission/reception with respect to positional deviation between a power transmission coil and a power reception coil. This wireless power supply device (100) supplies power to a power-receiving coil by using a magnetic-resonance format, wherein the device has a first coil array layer comprising at least one power transmission coil (110) connected to an oscillation circuit (13), and a second coil array layer comprising at least one power relay coil (120) arranged in a state straddling the power transmission coil (110). Adopting this configuration makes it possible to supply power at high efficiency even when the power receiving coil is situated elsewhere than directly above the power transmission coil.