WIRELESS POWER SUPPLY APPARATUS, WIRELESS POWER SUPPLY SYSTEM, AND WIRELESS POWER SUPPLY METHOD
First Claim
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1. A wireless power supply apparatus comprising:
- a power supplying unit that supplies electric power to a power transmission coil at a resonance frequency at which magnetic field resonance is generated between the power transmission coil and a power reception coil, the power transmission coil sending out electric power as magnetic field energy, using the magnetic field resonance;
a detecting unit that detects a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and
a control unit that switches an amount of the electric power supplied by the power supplying unit, based on the phase difference.
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Abstract
A wireless power supply apparatus includes a power supplying unit that supplies electric power to a power transmission coil at a resonance frequency at which magnetic field resonance is generated between the power transmission coil and a power reception coil, the power transmission coil sending out electric power as magnetic field energy, using the magnetic field resonance; a detecting unit that detects a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and a control unit that switches an amount of the electric power supplied by the power supplying unit, based on the phase difference.
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Citations
13 Claims
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1. A wireless power supply apparatus comprising:
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a power supplying unit that supplies electric power to a power transmission coil at a resonance frequency at which magnetic field resonance is generated between the power transmission coil and a power reception coil, the power transmission coil sending out electric power as magnetic field energy, using the magnetic field resonance; a detecting unit that detects a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and a control unit that switches an amount of the electric power supplied by the power supplying unit, based on the phase difference. - View Dependent Claims (2, 3, 4)
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5. A wireless power supply system comprising:
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a power transmission coil that sends out electric power as magnetic field energy, using magnetic field resonance; a power supplying unit that supplies electric power to a power transmission coil at a resonance frequency at which the magnetic field resonance is generated between the power transmission coil and a power reception coil; a detecting unit that detects a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and a control unit that switches an amount of the electric power supplied by the power supplying unit, based on the phase difference. - View Dependent Claims (6, 7, 8, 9)
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10. A wireless power supply method comprising:
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supplying electric power to a power transmission coil at a resonance frequency at which magnetic field resonance is generated between the power transmission coil and a power reception coil, the power transmission coil sending out electric power as magnetic field energy, using the magnetic field resonance; detecting a phase difference of current flowing in the power transmission coil for voltage applied to the power transmission coil; and switching an amount of the electric power supplied to the power transmission coil, based on the phase difference. - View Dependent Claims (11, 12, 13)
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Specification