Tuning and gain control in electro-magnetic power systems
First Claim
Patent Images
1. A near-field magnetic power coupling system, comprising:
- a receiver configured to receive power from a near-field magnetic field generated by a transmitting antenna of a transmitter that conveys power in the magnetic field via a power coupling between the receiver and the transmitter; and
a circuit configured to supply the power received by the receiver to a load, the receiver further configured to generate and transmit a feedback signal to the transmitter, the feedback signal representing at least one characteristic of the power coupling, and the feedback signal including at least information representative of an intensity of the near-field magnetic field, and the receiver further configured to sense a change in the at least one characteristic of the power coupling that is produced by a change of at least one physical parameter of the transmitter in response to the feedback signal.
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Abstract
Tuning and gain control as described for magnetic power systems, including different ways to change the characteristic of transmission and reception.
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Citations
40 Claims
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1. A near-field magnetic power coupling system, comprising:
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a receiver configured to receive power from a near-field magnetic field generated by a transmitting antenna of a transmitter that conveys power in the magnetic field via a power coupling between the receiver and the transmitter; and a circuit configured to supply the power received by the receiver to a load, the receiver further configured to generate and transmit a feedback signal to the transmitter, the feedback signal representing at least one characteristic of the power coupling, and the feedback signal including at least information representative of an intensity of the near-field magnetic field, and the receiver further configured to sense a change in the at least one characteristic of the power coupling that is produced by a change of at least one physical parameter of the transmitter in response to the feedback signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A near-field magnetic power coupling system comprising:
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a transmitter that receives electric power from a power source to be transmitted to a receiver, and couples the power to the receiver by creating a near-field magnetic field within a field of a transmitting antenna; and a receiving part that receives a signal from the receiver indicative of a feedback control, the signal including at least information representative of an intensity of the near-field magnetic field, the transmitter further configured to change a characteristic of the created near-field magnetic field based on the signal indicative of the feedback control to increase power transmission efficiency. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for transmitting power, comprising:
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creating a near-field magnetic field within a field of a transmitting antenna to be coupled to a load, the load including a receiver; detecting if the load is present, and if so coupling the near-field magnetic field to the load so as to produce power for transmission to the load; receiving a feedback signal from the receiver, the feedback signal including at least information representative of an intensity of the near-field magnetic field; adjusting a physical parameter of the transmitting antenna to increase power transmission efficiency based at least in part on the feedback signal; and shutting off or hibernating transmission upon detecting removal of the load from the field.
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30. A method for transmitting power, comprising:
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receiving electric power from a power source; coupling the power to a receiver magnetically by creating a near-field magnetic field within a field of a transmitting antenna; receiving a feedback control signal including at least information representative of an intensity of the near-field magnetic field, the signal being transmitted from the receiver; and changing a characteristic of the created near-field magnetic field based on the feedback control signal. - View Dependent Claims (31, 32)
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33. A method for transferring power, comprising:
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generating from electric power a near-field magnetic field that is capable of conveying power from a first location, where the electric power is used, to a second location within a field of a transmitting antenna, the antenna being remote from the first location; receiving the magnetic field in a receiver that is remote from a source of the electric power and that is not connected thereto by an electric wire, and producing an electrical output signal based on the near-field magnetic field; receiving a feedback control signal including at least information representative of a concentration of the near-field magnetic field in the receiver, the signal being transmitted from the receiver; and based on the feedback control signal, changing a characteristic of the created near-field magnetic field.
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34. An apparatus for transmitting power, comprising:
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means for receiving electric power from a power source, means for coupling the power to a remote receiver magnetically by creating a near-field magnetic field within a field of the means for coupling; means for receiving a feedback control signal including at least information representative of a concentration of the near-field magnetic field, the signal being transmitted from the remote receiver; and means for changing a characteristic of the created near-field magnetic field based on the feedback control signal. - View Dependent Claims (35, 36, 37)
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38. A method for receiving power comprising:
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receiving power at a receiver from a near-field magnetic field generated by a transmitting antenna of a transmitter that conveys power in the near-field magnetic field; supplying the power received at the receiver to a load; transmitting a feedback signal to the transmitter, the feedback signal including at least information representative of an intensity of the near-field magnetic field; and sensing a change in at least one characteristic of the power coupling between the transmitter and the receiver produced by a change of at least one physical parameter of the transmitter in response to the feedback signal.
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39. An apparatus for receiving power comprising:
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means for receiving power from a near-field magnetic field generated by a transmitting antenna of a transmitter that conveys power in the near-field magnetic field; means for supplying the power received to a load; means for transmitting a feedback signal to the transmitter, the feedback signal including at least information representative of an intensity of the near-field magnetic field; and means for sensing a change in at least one characteristic of the power transmission from the transmitter produced by a change of at least one physical parameter of the transmitter in response to the feedback signal. - View Dependent Claims (40)
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Specification