WIRELESS POWER FEEDING DEVICE, AND WIRELESS POWER TRANSMISSION SYSTEM

摘要

A wireless power feeding device (116) can perform the wireless power feeding from a power feeding coil (L2) to a power receiving coil (L3) on the basis of a magnetic resonance phenomenon between the power feeding coil (L2) and the power receiving coil (L3). A power feeding control circuit (200) feeds an alternate current to the power feeding coil (L2) at a driving frequency (fo). The power feeding coil (L2) outputs the alternate current electric power while being not substantially resonated with a circuit element on the power feeding side. An electric power is fed to a power receiving coil circuit (130) by the action of the magnetic resonance between the power feeding coil (L2) and the power receiving coil (L3).