FOREIGN MATTER DETECTOR, POWER TRANSMITTER, POWER RECEIVER, AND WIRELESS POWER TRANSMISSION SYSTEM

摘要

A foreign matter detector is provided with an electronic oscillator (100) that has a coil (110) and resonant capacitors (Cx, Cy) and is configured so as to output voltage having a DC component and an AC component having positive and negative cycles and an electrical circuit that detects changes in the AC component and DC component of the voltage output by the electronic oscillator (100) when foreign matter approaches the coil (110).