Wireless energy transfer across variable distances using field shaping with magnetic materials to improve the coupling factor

  • US 8,669,676 B2
  • Filed: 12/30/2009
  • Issued: 03/11/2014
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A system, comprising:

  • a source resonator coupled to an energy source generating a field having magnetic material; and

    a second resonator located a variable distance from the source resonator having magnetic material and not connected by any wire or shared magnetic material to the source resonator, wherein the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator;

    wherein the field of at least one of the source resonator and the second resonator is shaped using magnetic materials to increase the coupling factor among the resonators.

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