ELECTROSTATIC-COUPLING CONTACTLESS POWER SUPPLY DEVICE
First Claim
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.
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Accused Products
Abstract
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.
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Citations
7 Claims
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1. An electrostatic-coupling contactless power supply device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification