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System and method for frequency protection in wireless charging

  • US 9,680,331 B2
  • Filed: 11/26/2014
  • Issued: 06/13/2017
  • Est. Priority Date: 03/20/2014
  • Status: Active Grant
First Claim
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1. An apparatus for controlling wireless charging, comprising:

  • a receiver communication circuit of a first entity configured to receive a current wirelessly from a second entity via electromagnetic induction during the charging of the first entity;

    a frequency measurement circuit configured to determine an operating frequency of the received current induced by the electromagnetic induction; and

    a controller configured to;

    receive a pulse waveform indicating a target frequency,determine a first frequency difference between the operating frequency and the target frequency,continue the charging in response to determining that the first frequency difference is less than or equal to a first tolerance level, andstop the charging in response to determining that the first frequency difference is greater than the first tolerance level.

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