WIRELESS POWER TRANSMITTING APPARATUS, WIRELESS POWER RECEIVING APPARATUS, AND WIRELESS POWER FEEDING SYSTEM
First Claim
1. A wireless power transmitting apparatus which transmit electric power in a wireless manner to a power receiving apparatus, said wireless power transmitting apparatus comprising:
- a power transmission coil;
a variable capacitance capacitor which is electrically connected with the power transmission coil;
a positional deviation amount detecting device configured to detect a positional deviation amount of a center of a power reception coil of the power receiving apparatus to a center of the power transmission coil; and
a capacitance controlling device configured to control capacitance of the variable capacitance capacitor on the basis of the detected positional deviation amount.
1 Assignment
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Accused Products
Abstract
A wireless power transmitting apparatus (10) is a wireless power transmitting apparatus which transmits electric power in a wireless manner by electromagnetic induction to a power receiving apparatus (20) which is provided with a power reception coil (220) and a fixed capacitance capacitor (230) electrically connected in parallel with the power reception coil. The wireless power transmitting apparatus is provided with: an alternating current power supply (110) which generates alternating current power; a power transmission coil (120) which is electrically connected to the alternating current power supply; a variable capacitance capacitor (130) which is electrically connected in series with the power transmission coil; and a capacitance controlling device (140) which controls a capacitance value of the variable capacitance capacitor to reduce a phase difference between a voltage phase and a current phase of the alternating current power.
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Citations
8 Claims
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1. A wireless power transmitting apparatus which transmit electric power in a wireless manner to a power receiving apparatus, said wireless power transmitting apparatus comprising:
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a power transmission coil; a variable capacitance capacitor which is electrically connected with the power transmission coil; a positional deviation amount detecting device configured to detect a positional deviation amount of a center of a power reception coil of the power receiving apparatus to a center of the power transmission coil; and a capacitance controlling device configured to control capacitance of the variable capacitance capacitor on the basis of the detected positional deviation amount. - View Dependent Claims (2, 3, 4)
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5. A control method in a wireless power transmitting apparatus which has a power transmission coil, a variable capacitance capacitor electrically connected with the power transmission coil, and which transmits electric power in a wireless manner to a power receiving apparatus, said control method comprising:
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a positional deviation amount detecting process which detects a positional deviation amount of a center of a power reception coil of the power receiving apparatus to a center of the power transmission coil; and a capacitance controlling process which controls capacitance of the variable capacitance capacitor on the basis of the detected positional deviation amount. - View Dependent Claims (6, 7, 8)
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Specification