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APPARATUS, SYSTEM, AND METHOD FOR DETECTING A FOREIGN OBJECT IN AN INDUCTIVE WIRELESS POWER TRANSFER SYSTEM

  • US 20130094598A1
  • Filed: 10/13/2011
  • Published: 04/18/2013
  • Est. Priority Date: 10/13/2011
  • Status: Active Grant
First Claim
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1. An inductive wireless power transfer device, comprising:

  • a transmitter configured to generate an electromagnetic field to a coupling region in response to an input signal; and

    control logic configured to determine an input power of the input signal, wherein the control logic is configured to determine a presence of a foreign object within the coupling region in response to a comparison of the input power and an output power of an output signal of a receiver within the coupling region.

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