Wireless energy transfer over distances to a moving device

  • US 8,766,485 B2
  • Filed: 12/30/2009
  • Issued: 07/01/2014
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A system, comprising:

  • a source resonator configured to be coupled to an energy source to generate a near field region comprising a temporally oscillating magnetic field; and

    at least one device resonator configured to be freely moving within the near field region of the source resonator,wherein the source resonator and the at least one device resonator are configured to be coupled to transfer electromagnetic energy wirelessly from said source resonator to said at least one device resonator at a rate κ

    as the at least one device resonator moves freely within the near field region when the source resonator is coupled to the energy source,wherein the source resonator has a resonant frequency ω

    1, an intrinsic loss rate Γ

    1, and is capable of storing electromagnetic energy with a high intrinsic quality factor Q1

    1/(2Γ

    1), andwherein the device resonator has a resonant frequency ω

    2, an intrinsic loss rate Γ

    2, and is capable of storing electromagnetic energy with a high intrinsic quality factor Q2

    2/(2Γ

    2), andwherein κ

    /sqrt(Γ

    1Γ

    2)>

    0.2 as the at least one device resonator moves freely within the near field region over distances from source resonator larger than the characteristic size L2 of the device resonator, andwherein Q1>

    100 and Q2>

    100.

View all claims
  • 3 Assignments
    ×
    ×

    Thank you for your feedback

    ×
    ×