WIRELESS POWER FEEDING DEVICE, WIRELESS POWER RECEIVING DEVICE, WIRELESS POWER FEEDING SYSTEM, AND ELECTRICAL INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide a wireless power feeding device capable of suppressing unnecessary electromagnetic field radiation.SOLUTION: A wireless power feeding device, which has a power feeding coil and feeds power to a wireless power receiving device provided with a power receiving coil by power transmission of an electromagnetic induction type utilizing the power feeding coil and the power receiving coil, has a configuration in which: the power feeding coil forms a linear signal path; the linear signal path is configured by forming a plurality of coil portions on the substantially same plane with a single wire of a conductive material; and when current flows through one end point of the single wire to the other end point, the current flows in opposite directions to each other in each of the neighboring coil portions.