WIRELESS POWER SUPPLY SYSTEM
First Claim
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1. A wireless power receiving apparatus configured to receive an electric power signal, including any one of an electric field, a magnetic field, and an electromagnetic field, the wireless power receiving apparatus comprising:
- a reception coil configured to receive the electric power signal;
a bridge circuit connected to the reception coil, and configured such that the on/off state of each internal switch thereof is capable of switching between a first state and a second state;
a receiver configured to receive a control signal which is transmitted from the power supply apparatus, and which includes at least one of frequency information and phase information with respect to switching between the first state and the second state; and
a control unit configured to switch the state of the bridge circuit between the first state and the second state according to the control signal.
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Abstract
A wireless power receiving apparatus comprises a bridge circuit and a control unit configured to control the bridge circuit. A wireless power supply apparatus transmits, to the wireless power receiving apparatus, an electric power signal and a control signal which indicates a control timing for the bridge circuit. A receiver receives the control signal transmitted from the wireless power supply apparatus. A control unit controls the bridge circuit according to the control signal.
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Citations
22 Claims
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1. A wireless power receiving apparatus configured to receive an electric power signal, including any one of an electric field, a magnetic field, and an electromagnetic field, the wireless power receiving apparatus comprising:
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a reception coil configured to receive the electric power signal; a bridge circuit connected to the reception coil, and configured such that the on/off state of each internal switch thereof is capable of switching between a first state and a second state; a receiver configured to receive a control signal which is transmitted from the power supply apparatus, and which includes at least one of frequency information and phase information with respect to switching between the first state and the second state; and a control unit configured to switch the state of the bridge circuit between the first state and the second state according to the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15)
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8. A wireless power supply apparatus configured to transmit, to a wireless power receiving apparatus, an electric power signal, including any one of an electric field, a magnetic field, and an electromagnetic field, wherein the wireless power receiving apparatus comprises:
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a reception coil configured to receive the electric power signal; a capacitor arranged such that a first terminal thereof is set to a fixed electric potential; a bridge circuit arranged between the reception coil and the capacitor, and configured such that the on/off state of each internal switch thereof is capable of switching between a first state and a second state; a receiver configured to receive a control signal which is transmitted from the power supply apparatus, and which includes at least one of frequency information and phase information with respect to switching between the first state and the second state; and a control unit configured to switch the state of the bridge circuit between the first state and the second state according to the control signal, and wherein the wireless power supply apparatus comprises; a transmission coil configured to transmit the electric power signal; a control signal generating unit configured to generate the control signal; and a transmitter configured to transmit the control signal. - View Dependent Claims (9, 10, 11, 12, 13)
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16. A wireless power receiving apparatus configured to receive an electric power signal, including any one of an electric field, a magnetic field, and an electromagnetic field, the wireless power receiving apparatus comprising:
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a reception coil configured to receive the electric power signal; a resonance capacitor arranged such that it forms a resonance circuit together with the reception coil; a receiver configured to receive a control signal which is transmitted from the power supply apparatus, and which indicates the frequency of the electric power signal; and a control unit configured to change the impedance of the resonance circuit according to the control signal such that resonance occurs between the resonance circuit and the electric power signal. - View Dependent Claims (17, 22)
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18. A wireless power supply apparatus configured to transmit an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field, wherein the wireless power receiving apparatus comprises:
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a reception coil configured to receive the electric power signal; a resonance capacitor arranged to form a resonance circuit together with the reception coil; a receiver configured to receive a control signal transmitted from the power supply apparatus, and indicating the frequency of the electric power signal; and a control unit configured to change the impedance of the resonance circuit according to the control signal such that resonance occurs between the resonance circuit and the electric power signal, and wherein the wireless power supply apparatus comprises; a transmission coil configured to transmit the electric power signal; a control signal generating unit configured to generate the control signal; and a transmitter configured to transmit the control signal. - View Dependent Claims (19, 20, 21)
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Specification