Contactless power supply device
First Claim
1. A contactless power supply device comprising:
- a plurality of high frequency power sources;
an excitation coil configured to be supplied with alternating current from a one of the plurality of high frequency power sources;
a resonance coil electromagnetically inductively coupled with the excitation coil;
a variable capacitor electrically connected to the resonance coil; and
a control circuit electrically connected to the variable capacitor,wherein the control circuit is configured to select the one of the plurality high frequency power sources for changing oscillation frequency, andwherein the variable capacitor is configured to make resonant capacitance of the resonance coil variable.
1 Assignment
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Accused Products
Abstract
A contactless power supply device capable of appropriately supplying power to a plurality of power supplied devices at the same time without contact is provided. A contactless power supply device capable of supplying power without contact even when the positional flexibility of a plurality of power supplied devices is increased is provided. The contactless power supply device determines a power supply condition that power can be most appropriately supplied to a plurality of power supplied devices that need power supply in a short time. The contactless power supply device can appropriately supply power to a plurality of power supplied devices at the same time without contact by controlling the resonant capacitance of a power transmission coil in an optimized power supply condition. The positional flexibility of the plurality of power supplied devices with respect to the contactless power supply device can be increased.
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Citations
22 Claims
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1. A contactless power supply device comprising:
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a plurality of high frequency power sources; an excitation coil configured to be supplied with alternating current from a one of the plurality of high frequency power sources; a resonance coil electromagnetically inductively coupled with the excitation coil; a variable capacitor electrically connected to the resonance coil; and a control circuit electrically connected to the variable capacitor, wherein the control circuit is configured to select the one of the plurality high frequency power sources for changing oscillation frequency, and wherein the variable capacitor is configured to make resonant capacitance of the resonance coil variable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A contactless power supply device comprising:
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a plurality of high frequency power sources; an excitation coil configured to be supplied with alternating current from a one of the plurality of high frequency power sources; a resonance coil electromagnetically inductively coupled with the excitation coil; a variable capacitor electrically connected to the resonance coil; and a control circuit including a digital/analog converter and a microprocessor, wherein the digital/analog converter is electrically connected to the microprocessor, wherein the digital/analog converter is electrically connected to the variable capacitor and the plurality of high frequency power sources, wherein the control circuit is configured to select the one of the plurality of high frequency power sources for changing oscillation frequency, and wherein the variable capacitor is configured to make resonant capacitance of the resonance coil variable. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A contactless power supply method for a contactless power supply device comprising:
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a plurality of high frequency power sources; an excitation coil; a resonance coil electromagnetically inductively coupled with the excitation coil; and a variable capacitor electrically connected to the resonance coil, the method comprising the steps of; supplying alternating current having oscillation frequency of a one selected from the plurality of high frequency power sources to the excitation coil; transmitting the alternating current to the resonance coil; and transmitting power to a plurality of power supplied devices when oscillation frequency of the resonance coil corresponds to oscillation frequency of the plurality of power supplied devices, wherein the power is supplied to the plurality of power supplied devices at the same time. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification