| 摘要 |
An electrostatic-coupling contactless power supply device of the invention includes: a plurality of power supply electrodes that are provided on a fixed portion; a high-frequency power supply circuit that supplies high-frequency power between the plurality of power supply electrodes; a plurality of power receiving electrodes that are provided on a movable portion movably mounted on the fixed portion, face the plurality of power supply electrodes so as to be spaced apart from the power supply electrodes, and receive high-frequency power in a contactless manner; a power receiving circuit that converts the high-frequency power received by the plurality of power receiving electrodes and supplies the converted high-frequency power to an electrical load provided on the movable portion; and an electrode abnormality detecting section that detects capacitances of capacitors formed by the power supply electrodes and the power receiving electrodes facing each other so as to be spaced apart from each other, and detects abnormality occurring in at least one of the power supply electrodes and the power receiving electrodes on the basis of changes of the capacitances. Accordingly, it is possible to prevent a short-circuit failure or an unstable operation in advance by detecting the abnormality of the electrodes, to maintain large power supply capacity and high power supply efficiency, and to appropriately determine whether or not maintenance is necessary. |
