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Wireless power transmitter and method of controlling the same

  • US 10,454,309 B2
  • Filed: 04/26/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 09/22/2015
  • Status: Active Grant
First Claim
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1. A method for controlling a wireless power transmitter transmitting wireless power to a wireless power receiver, the method comprising:

  • generating first differential signals by using a signal generated by a signal generating unit of the wireless power transmitter;

    outputting second differential signals by amplifying the first differential signals;

    wirelessly transmitting power by applying the second differential signals to a resonating unit of the wireless power transmitter;

    detecting at least one of amplitudes or phases of the second differential signals; and

    in response to identifying that at least one of an amplitude difference or a phase difference between the second differential signals is out of a reference range, adjusting at least one of amplitudes or phases of the first differential signals using a variable resistor in the wireless power transmitter such that the amplitudes of the second differential signals are matched or the second differential signals are 180 degrees out of phase.

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