| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal foreign matter detection device capable of detecting a position of small metal foreign matter, which is lost onto a power transmission unit of a non-contact power supply device, by a simple configuration.SOLUTION: A foreign matter sensor unit 4 comprises a plurality of resonance circuits different in resonance frequency to make a frequency of a variable-frequency supply 51 swept to include each resonance frequency of the resonance circuit. In this case, since impedance is changed only at the resonance frequency of a search coil where metal foreign matter exists, a position of the metal foreign matter can be identified. |
