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Wireless power distribution among a plurality of receivers

  • US 9,819,326 B2
  • Filed: 10/07/2014
  • Issued: 11/14/2017
  • Est. Priority Date: 04/23/2010
  • Status: Active Grant
First Claim
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1. A wireless power transmitter for controlling impedance, comprising:

  • a transmit circuit configured to i) wirelessly transmit power to a plurality of receivers, each having a load resistance, within a charging region of the transmit circuit, the plurality of receivers having a first total impedance presented to the transmit circuit and ii) determine a target total impedance that is different from the first total impedance; and

    a controller configured to request each receiver of the plurality of receivers to adjust its load resistance to a value that achieves the target total impedance determined by the transmit circuit.

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