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 track portion, the track portion including a plurality of magnets arranged in a line;
a high-frequency power source circuit that supplies high-frequency power to the power supply electrode;
a movable portion that moves linearly relative to the track portion, the movable portion including an armature that generates a propulsive force against the magnets;
a power receiving electrode that is provided on the movable portion, that faces the power supply electrode so as to be spaced apart from the power supply electrode, and that 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 electrical load including the armature, 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
8 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 track portion, the track portion including a plurality of magnets arranged in a line; a high-frequency power source circuit that supplies high-frequency power to the power supply electrode; a movable portion that moves linearly relative to the track portion, the movable portion including an armature that generates a propulsive force against the magnets; a power receiving electrode that is provided on the movable portion, that faces the power supply electrode so as to be spaced apart from the power supply electrode, and that 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 electrical load including the armature, 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, 8)
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Specification