| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-contact power transmission device capable of reliably detecting an entered foreign matter.SOLUTION: The non-contact power transmission device includes: a power reception unit 110; a primary coil 122 that generates a magnetic flux using an input AC current; a power supply unit 101 which has a cover 121 covering the primary coil 122 and supplies the power to the power reception unit 110 in a non contact manner; a foreign matter detection means 106 that detects foreign matters existing adjacent to the cover 121; a foreign matter determination means 107 that determines existence of foreign matters according to the output from the foreign matter detection means 106. Since the foreign matter determination means 107 changes a determination threshold value for detecting a foreign matter according to the state of the power reception unit 110 and the power supply unit 101, a foreign matter entered between the power supply unit 101 and the power reception unit 110 can be reliably detected while reducing influences by AC magnetic field etc. from the primary coil 122. |
