ELECTROSTATIC-COUPLING CONTACTLESS POWER SUPPLY DEVICE

摘要

An electrostatic-coupling contactless power supply device includes a power supply electrode and a high-frequency power source circuit that are provided on a fixing portion, and a power receiving electrode and a power receiving circuit that are provided on a movable portion. The power supply electrode is formed of a plurality of segment electrodes which are arranged in a line in a moving direction of the movable portion and to which power is individually supplied from the high-frequency power source circuit. A plurality of switches are connected between the high-frequency power source circuit and the segment electrodes, respectively, and are opened and closed independently of one another. A current detecting circuit individually detects segment currents flowing in the respective segment electrodes; and a switch controller controls the switches so that only a part of the plurality of switches are closed.

主权项

1. An electrostatic-coupling contactless power supply device comprising:
a power supply electrode that is provided on a fixing portion; a high-frequency power source circuit that supplies high-frequency power to the power supply electrode; a power receiving electrode that is provided on a movable portion movably mounted on the fixing portion, faces the power supply electrode so as to be spaced apart from the power supply electrode, and receives high-frequency power in a contactless manner; and a power receiving circuit that converts the high-frequency power received by the power receiving electrode and supplies the converted high-frequency power to an electrical load provided on the movable portion, the power supply electrode being formed of a plurality of segment electrodes which are arranged in a line in a moving direction of the movable portion and to which power is individually supplied from the high-frequency power source circuit, the electrostatic-coupling contactless power supply device further comprising: a plurality of switches that are connected between the high-frequency power source circuit and the segment electrodes, respectively, and are opened and closed independently of one another; a current detecting circuit that individually detects segment currents flowing in the respective segment electrodes; and a switch controller that controls the switches on the basis of at least one of a magnitude and an increase/decrease state of each of the segment currents changing with the movement of the movable portion so that only a part of the plurality of switches are closed.