WIRELESS POWER TRANSMISSION SYSTEM AND INDUCTION HEATING COOKER

A wireless power transmission apparatus according to the present invention includes a coil which generates a high-frequency magnetic field upon reception of a high-frequency current, a support which supports the power receiving device within the high-frequency magnetic field, an inverter circuit which supplies the high-frequency current to the coil, and a controller which controls the driving of the inverter circuit. The controller performs a power transmission operation to transmit power to the power receiving device, if the impedance on the output side of the inverter circuit exhibits a resonant characteristic as the driving frequency of the inverter circuit is changed.