System and method for detecting inadequate wireless coupling and improving in-band signaling in wireless power transfer systems
First Claim
1. An apparatus for receiving wireless power, the apparatus comprising:
- a receive coupler configured to receive the wireless power from a wireless power transmitter;
a receive circuit electrically connected to the receive coupler, the receive, circuit configured to provide power to a load; and
a controller circuit configured to;
provide a first amount of power from the receive circuit to the load, andreduce, in response to determining that a level of coupling between the receive coupler and the wireless power transmitter is below a threshold, the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the receive circuit compared to when the first amount of power is provided to the load.
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Abstract
An apparatus for receiving wireless power is provided. The apparatus comprises a receive coupler configured to receive the wireless power from a wireless power transmitter. The apparatus comprises a receive circuit electrically connected to the receive coupler, the receive circuit configured to provide power to a load. The apparatus comprises a controller circuit configured to provide a first amount of power from the receive circuit to the load. The controller circuit is further configured to reduce the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the receive circuit compared to when the first amount of power is provided to the load.
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Citations
27 Claims
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1. An apparatus for receiving wireless power, the apparatus comprising:
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a receive coupler configured to receive the wireless power from a wireless power transmitter; a receive circuit electrically connected to the receive coupler, the receive, circuit configured to provide power to a load; and a controller circuit configured to; provide a first amount of power from the receive circuit to the load, and reduce, in response to determining that a level of coupling between the receive coupler and the wireless power transmitter is below a threshold, the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the receive circuit compared to when the first amount of power is provided to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for receiving wireless power by a wireless power receiver, the method comprising:
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receiving wireless power from a wireless power transmitter via a receive coupler of the wireless power receiver for providing power to a load, providing a first amount of power to the load from a receive circuit electrically connected to the receive coupler, and reducing, in response to determining that a level of coupling between the receive coupler and the wireless power transmitter is below a threshold, the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the receive circuit compared to when the first amount of power is provided to the load. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable, medium comprising code that, when executed, causes a wireless power receiver to:
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receive wireless power from a wireless power transmitter via a receive coupler of the wireless power receiver for providing power to a load, provide a first amount of power to the load from a receive circuit electrically connected to the receive coupler, and reduce, in response to determining that a level of coupling between the receive coupler and the wireless power transmitter is below a threshold, the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the receive circuit compared to when the first amount of power is provided to the load. - View Dependent Claims (21, 22, 23, 24)
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25. An apparatus for receiving wireless power, the apparatus comprising:
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means for coupling wireless power from a wireless power transmitter; means for providing a first amount of power to a load; and means for reducing, in response to determining that a level of coupling between the coupling means and the wireless power transmitter is below a threshold, the first amount of power to a second amount of power for a duration of communication with the wireless power transmitter to increase a difference between a first impedance and a second impedance of the apparatus compared to when the first amount of power is provided to the load. - View Dependent Claims (26, 27)
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Specification