FREQUENCY CHANGING ENCODED RESONANT POWER TRANSFER
First Claim
1. A system to provide wireless power transfer to one or more mobile devices, the system comprising:
- a transmit coil that is configured to generate an electromagnetic signal that induces a current in one or more receive coils of the one or more mobile devices effective to provide power to the one or more mobile devices; and
a control module that is communicatively coupled to the transmit coil and to the one or more mobile devices, the control module configured to generate a sequence of resonant drive frequencies and to adjust a resonant drive frequency of the transmit coil in accordance with the generated sequence of resonant drive frequencies,the control module further configured to provide the sequence of resonant drive frequencies to the one or more mobile devices effective to allow the one or more receive coils of the one or more mobile devices to be driven by substantially the same resonant drive frequency as the transmit coil.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods to for wireless power transfer are provided. A transmit control module generates a sequence of resonant drive frequencies for a transmit coil. The transmit control module adjusts the resonant frequency of the transmit coil according to the sequence of resonant drive frequencies. A receive control module provides payment verification to the transmit control module and receives the sequence of resonant drive frequencies from the transmit control module in return. The receive control module adjusts a resonant frequency of a receive coil according to the sequence of resonant drive frequencies to match the resonant frequency of the transmit coil. The resonant frequencies of the transmit and receive coils change at the same time to maintain coupling and efficient power transfer.
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Citations
21 Claims
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1. A system to provide wireless power transfer to one or more mobile devices, the system comprising:
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a transmit coil that is configured to generate an electromagnetic signal that induces a current in one or more receive coils of the one or more mobile devices effective to provide power to the one or more mobile devices; and a control module that is communicatively coupled to the transmit coil and to the one or more mobile devices, the control module configured to generate a sequence of resonant drive frequencies and to adjust a resonant drive frequency of the transmit coil in accordance with the generated sequence of resonant drive frequencies, the control module further configured to provide the sequence of resonant drive frequencies to the one or more mobile devices effective to allow the one or more receive coils of the one or more mobile devices to be driven by substantially the same resonant drive frequency as the transmit coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method to provide wireless power transfer to one or more mobile devices, the method comprising:
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generating a sequence of resonant drive frequencies for a transmit coil; transmitting, by the transmit coil, an electromagnetic signal at a first resonant drive frequency to one or more receive coils of one or more mobile devices, the electromagnetic signal inducing a current in the one or more receive coils effective to provide power to the one or more mobile devices, the one or more receive coils operating at a first resonant receive frequency that is equivalent to the first resonant drive frequency; adjusting the first resonant drive frequency of the transmit coil to a second resonant drive frequency in accordance with the generated sequence of resonant drive frequencies; and providing the generated sequence of resonant drive frequencies to the one or more mobile devices effective to allow a resonant receive frequency of the one or more receive coils of the one or more mobile devices to adjust from the first resonant receive frequency to a second resonant receive frequency that is equivalent to the second resonant drive frequency at substantially the same time the transmit coil adjusts from the first to the second resonant drive frequencies. - View Dependent Claims (11)
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12. A system for a mobile device to receive wireless power transfer, the system comprising:
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a receive coil that is configured to receive an electromagnetic signal from a transmit coil, the electromagnetic signal generated by the transmit coil being configured to induce a current in the receive coil; and a control module that is communicatively coupled to the receive coil and to a transmit module that controls the transmit coil, the control module configured to receive from the transmit module a sequence of resonant drive frequencies for the transmit coil, the control module further configured to adjust a resonant receive frequency of the receive coil in accordance with the sequence of resonant drive frequencies so that the resonant receive frequency of the receive coil matches the resonant drive frequency of the transmit coil. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method for a mobile device to receive wireless power transfer, the method comprising:
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receiving a sequence of resonant drive frequencies for a transmit coil from a transmit module that controls the transmit coil; receiving, at a receive coil of the mobile device that is operating at a first resonant receive frequency that is equivalent to a first resonant drive frequency of the transmit coil, a first electromagnetic signal from the transmit coil transmitted at the first resonant drive frequency, the electromagnetic signal inducing a current in the receive coil effective to provide power to the mobile device; and adjusting the first resonant receive frequency of the receive coil to a second resonant receive frequency in accordance with the received sequence of resonant drive frequencies so that the receive coil is able to receive a second electromagnetic signal from the transmit coil transmitted at a second resonant drive frequency, the second resonant receive frequency being equivalent to the second resonant drive frequency. - View Dependent Claims (21)
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Specification