WIRELESS POWER SUPPLY DEVICE AND WIRELESS POWER RECEPTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a wireless power supply device enabling the use of mobile electronic equipment without a hindrance if the mobile electronic equipment is being charged inside an automobile.SOLUTION: In a wireless power supply device for supplying power from a power transmission device 1 to the equipment of a power supply target (mobile electronic equipment 3 having built-in power reception equipment) with magnetic field resonance, the power transmission device 1 includes: a power transmission circuit 12 for supplying power to feed to the power reception equipment; a plurality of power transmission coils 10 connected to the power reception circuit 12; and a switching circuit 13 for switching the power supply through a selected power transmission coil. The power transmission circuit 12 includes a control unit 121 for successively supplying power to each transmission coil 10 and measures each power supply capability to search for a power transmission coil 10 having high power supply capability and select it.