RESONANT FREQUENCY CONTROL METHOD, ELECTRIC POWER TRANSMITTING DEVICE, ELECTRIC POWER RECEIVING DEVICE IN MAGNETIC RESONANT TYPE POWER TRANSMISSION SYSTEM
First Claim
1. A resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, comprising:
- detecting a phase of a voltage supplied to the power transmitting coil and a phase of a current that flows in the power transmitting coil or the power receiving coil, and varying a resonant frequency of the power transmitting coil or the power receiving coil such that phase difference between them becomes a target value.
1 Assignment
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Accused Products
Abstract
In a resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, a high-speed, accurate and real-time adjustment of the resonant frequency of a coil is realized. The phase of a voltage supplied to a power transmitting coil and the phase of a current that flows in the power transmitting coil or a power receiving coil is detected and the resonant frequency of the power transmitting coil or the power receiving coil is varied such that the phase difference between them becomes a target value.
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Citations
16 Claims
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1. A resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, comprising:
detecting a phase of a voltage supplied to the power transmitting coil and a phase of a current that flows in the power transmitting coil or the power receiving coil, and varying a resonant frequency of the power transmitting coil or the power receiving coil such that phase difference between them becomes a target value. - View Dependent Claims (2, 3, 4, 5)
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6. A magnetic field resonant type power transmission device transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, comprising:
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a phase detection unit configured to detect a phase of a voltage supplied to the power transmitting coil and a phase of a current that flows in the power transmitting coil or the power receiving coil; and a resonant frequency control unit configured to vary a resonant frequency of the power transmitting coil or the power receiving coil such that a phase difference between the detected phases becomes a target value.
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7. A magnetic field resonant coupling type power transmission device transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonant, comprising:
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a power transmitting phase detection unit configured to detect a phase of a voltage supplied to the power transmitting coil and a phase of a current that flows in the power transmitting coil; a power transmitting resonant frequency control unit configured to vary a resonant frequency of the power transmitting coil such that a phase difference between the detected phases becomes a target value. - View Dependent Claims (8, 9, 10, 11)
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12. A power receiving device in a magnetic field resonant coupling type power transmission device transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, comprising:
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a phase information reception unit configured to receive information about a phase of a voltage supplied to the power transmitting coil; a power receiving phase detection unit configured to detect a phase of a current that flows in the power receiving coil; and a power receiving resonant frequency control unit configured to vary a resonant frequency of the power receiving coil such that a phase difference between a phase of a voltage received by the phase information reception unit and a detected phase of the current becomes a target value. - View Dependent Claims (13, 14, 15, 16)
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Specification