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METHODS AND APPARATUS FOR EFFICIENT WIRELESS POWER TRANSFER

  • US 20180219418A1
  • Filed: 02/02/2017
  • Published: 08/02/2018
  • Est. Priority Date: 02/02/2017
  • Status: Abandoned Application
First Claim
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1. An apparatus for transmitting wireless power, comprising:

  • a power transmission circuit having a first antenna and configured to provide power sufficient to charge a receiver via a first magnetic field, wherein the power transmission circuit experiences a level of impedance based at least in part on an impedance of the receiver; and

    a power transceiver circuit coupled to the power transmission circuit, the power transceiver circuit having a transceiver impedance and configured to;

    in a first mode, receive power from the power transmission circuit and generate a second magnetic field; and

    in a second mode, receive power from the first magnetic field and maintain the level of impedance experienced by the power transmission circuit within a target impedance range based on controlling variations in the transceiver impedance.

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