Wireless energy transfer systems

  • US 8,461,719 B2
  • Filed: 09/25/2009
  • Issued: 06/11/2013
  • 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 having a Q-factor Q1 and a characteristic size x1, coupled to a power generator with direct electrical connections; and

    a second resonator having a Q-factor Q2 and a characteristic size x2, coupled to a load with a second direct electrical connection, and located a distance D from the source resonator, wherein the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator in order to transmit power from the power generator to the load, wherein √

    {square root over (Q1Q2)} is greater than 100, wherein at least one of the source resonator and the second resonator is a coil of at least one turn of a conducting material connected to a first network of capacitors, and wherein the direct electrical connections of at least one of the source resonator to the ground terminal of the power generator and the second resonator to the ground terminal of the load is made at a point on an axis of electrical symmetry of the first network of capacitors.

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