WIRELESS POWER TRANSMITTING DEVICE, WIRELESS POWER RECEIVING DEVICE, AND WIRELESS POWER TRANSMISSION SYSTEM

An object of the present invention is to improve detection accuracy of a metallic foreign object between a feeding coil and a receiving coil during wireless power feeding. A wireless power transmitting device is a device that performs power transmission by wireless using an alternating magnetic field vibrating at a predetermined power transmission frequency and includes a feeding coil, an antenna coil, a capacitor that constitutes a resonance circuit RC together with the antenna coil, a noise detection part that detects noise vibrating at a frequency higher than the power transmission frequency, and a foreign object detection part that detects the presence/absence of a metallic foreign object based on a change in voltage or current generated in the resonance circuit RC and a noise detection result from the noise detection part.