WIRELESS POWER TRANSMITTING APPARATUS, WIRELESS POWER RECEIVING APPARATUS, AND WIRELESS POWER FEEDING SYSTEM
1 Assignment
0 Petitions
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.
60 Citations
48 Claims
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1-23. -23. (canceled)
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24. A wireless power transmitting apparatus which transmits electric power in a wireless manner by electromagnetic induction to a power receiving apparatus, said wireless power transmitting apparatus comprising:
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a power transmission coil which is electrically connected to an alternating current power supply which generates alternating current power; a variable capacitance capacitor which is electrically connected with the power transmission coil; and a capacitance controlling device 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. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A wireless power receiving apparatus which receives electric power in a wireless manner by electromagnetic induction from a power transmitting apparatus, said power receiving apparatus comprising:
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a power reception coil; a variable capacitance capacitor which is electrically connected with the power reception coil; and a capacitance controlling device which controls a variable value of the variable capacitance capacitor to reduce a phase difference between a voltage phase and a current phase of the alternating current power. - View Dependent Claims (35)
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37. A wireless power feeding system comprising a power transmission coil which is electrically connected to an alternating current power supply which generates an alternating current power and a power reception coil which receives electric power in a wireless manner by electromagnetic induction from the power transmission coil,
said wireless power feeding system comprising: -
a capacitor which is electrically connected with one of the power transmission coil and the power reception coil; a variable capacitance capacitor which is electrically connected with the other one of the power transmission coil and the power reception coil; and a capacitance controlling device 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. - View Dependent Claims (38, 39)
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40. A control method in a wireless power transmitting apparatus which transmits electric power in a wireless manner by electromagnetic induction to a power receiving apparatus, the wireless power transmitting apparatus comprising:
- a power transmission coil which is electrically connected to an alternating current power supply which generates alternating current power; and
a variable capacitance capacitor which is electrically connected with the power transmission coil,said control method comprising; a capacitance controlling process 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. - View Dependent Claims (41, 42)
- a power transmission coil which is electrically connected to an alternating current power supply which generates alternating current power; and
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43. A control method in a wireless power receiving apparatus which receives electric power in a wireless manner by electromagnetic induction from a power transmitting apparatus, the wireless power receiving apparatus comprising:
- a power reception coil; and
a variable capacitance capacitor which is electrically connected with the power reception coil,said control method comprising; a capacitance controlling process which controls a variable value of the variable capacitance capacitor to reduce a phase difference between a voltage phase and a current phase of the alternating current power. - View Dependent Claims (44, 45)
- a power reception coil; and
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46. A control method in a wireless power feeding system comprising a power transmission coil which is electrically connected to an alternating current power supply which generates an alternating current power, a power reception coil which receives electric power in a wireless manner by electromagnetic induction from the power transmission coil, a capacitor which is electrically connected with one of the power transmission coil and the power reception coil, a variable capacitance capacitor which is electrically connected with the other one of the power transmission coil and the power reception coil,
said control method comprising: a capacitance controlling process 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. - View Dependent Claims (47, 48)
Specification