Systems and method for wireless power transfer

  • US 10,115,520 B2
  • Filed: 03/14/2013
  • Issued: 10/30/2018
  • Est. Priority Date: 01/18/2011
  • Status: Active Grant
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First Claim
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1. A base unit for wireless power transfer through a magnetic field, comprising:

  • one or more components including a magnetic material or layer, that modify the magnitude and/or phase of the magnetic field and/or guide a corresponding magnetic flux generated by one or more coils in the base unit in one or multiple dimensions and/or to guide the magnetic flux in such a manner as to create a preferential path for returning flux flow in one or multiple dimensions,wherein, when one or more power receivers each having one or more receiver coils or receivers associated therewith, is placed in proximity to a base unit, the one or more coils in the base unit are used to inductively generate a current in the one or more receiver coils or receivers associated with the one or more power receivers, andfurther wherein the base unit and the one or more power receivers have a coupling coefficient therebetween of less than 0.5.

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