Adaptive power control for wireless charging of devices
First Claim
1. A wireless power transmitter, comprising:
- a transmit antenna configured to generate an electromagnetic field having a region for wirelessly transferring power from the transmit antenna to a plurality of receiver devices; and
a controller operably coupled to the transmit antenna, wherein the controller is configured to;
determine a power allocation within a time period for a particular one of the plurality of receiver devices disposed within the region, the time period recurring at an interval, andadjust the power allocation within a subsequent time period based on a power requirement received from the particular one of the plurality of receiver devices.
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Accused Products
Abstract
Exemplary embodiments are directed to wireless power transfer. A transmitter generates an electromagnetic field at a resonant frequency with a transmit antenna to create a coupling-mode region within a near field of the transmit antenna. The transmitter defines a beginning of a recurring period by on-off keying the electromagnetic field during a synchronization portion of the recurring period. During a power transmission portion of the recurring period, the transmitter couples portions of the electromagnetic field to different receive antennas of various receiver devices within the coupling-mode region. The transmitter also determines a power allocation within the recurring period for the various receiver devices disposed within the coupling-mode region and adjusts a power level of the near field radiation responsive to power requirements received from the receiver devices.
348 Citations
43 Claims
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1. A wireless power transmitter, comprising:
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a transmit antenna configured to generate an electromagnetic field having a region for wirelessly transferring power from the transmit antenna to a plurality of receiver devices; and a controller operably coupled to the transmit antenna, wherein the controller is configured to; determine a power allocation within a time period for a particular one of the plurality of receiver devices disposed within the region, the time period recurring at an interval, and adjust the power allocation within a subsequent time period based on a power requirement received from the particular one of the plurality of receiver devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of wireless power transfer, comprising:
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generating an electromagnetic field having a region for wirelessly transferring power from a transmit antenna to a plurality of receiver devices; determining a power allocation within a time period for a particular one of the plurality of receiver devices disposed within the region, the time period recurring at an interval; and adjusting the power allocation within a subsequent time period based on a power requirement received from the particular one of the plurality of receiver devices. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A power transfer system, comprising:
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means for generating an electromagnetic field having a region for wirelessly transferring power from a transmit antenna to a plurality of receiver devices; means for determining a power allocation within a time period for a particular one of the plurality of receiver devices disposed within the region, the time period recurring at an interval; and means for adjusting the power allocation within a subsequent time period based on a power requirement received from the particular one of the plurality of the receiver devices. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A wireless power transmitter, comprising:
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a transmit antenna configured to generate an electromagnetic field having a region for wirelessly transferring power from the transmit antenna to a plurality of receiver devices; and a controller operably coupled to the transmit antenna, wherein the controller is configured to; determine a power allocation within a first time period for a first one of the plurality of receiver devices disposed within the region; and determine a power allocation within a second time period for a second one of the plurality of receiver devices disposed within the region, at least one of the first and second time periods recurring at an interval. - View Dependent Claims (41, 42, 43)
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Specification