| 摘要 |
An electrostatic-coupling contactless power supply device 1 of the invention includes: a plurality of power supply electrode plates 41 to 44 that are provided on a static portion (track member 2) ; a high-frequency power source circuit 5 that supplies high-frequency power between the plurality of power supply electrode plates 41 to 44; a plurality of power receiving electrode plates 61 to 64 that are provided on a movable portion (linear movable portion 3) movably mounted on the static portion 2, face the plurality of power supply electrode plates 41 to 44 so as to be spaced apart from the plurality of power supply electrode plates 41 to 44, respectively, and receive high-frequency power in a contactless manner; and the power receiving circuit 7 that converts the high-frequency power received by the plurality of power receiving electrode plates 61 to 64 and supplies the converted high-frequency power to an electrical load 8 provided on the movable portion 3. When the position of the movable portion 3 relative to the static portion 2 is changed, capacitances C1 to C4 of a plurality of capacitors Cds1 to Cds4, which are formed by the power supply electrode plates 41 to 44 and the power receiving electrode plates 61 to 64 facing each other so as to be spaced apart from each other, are changed so as to compensate each other. Accordingly, since the change of a capacitance is suppressed even though the position of the movable portion 3 relative to the static portion 2 is changed, high power supply efficiency can be maintained. |
