Wireless energy transfer

  • US 9,509,147 B2
  • Filed: 03/08/2013
  • Issued: 11/29/2016
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A power supply system comprising:

  • a power supply loop that is configured to be supplied with power from a power supply;

    a power supply-side resonance coil that is configured to be supplied with power from the power supply loop in a non-contact manner, wherein the power supply-side resonance coil is part of a source resonator having a resonant frequency ω

    1, an intrinsic loss rate Γ

    1, and an intrinsic quality factor Q1

    1/(2Γ

    1);

    a power receiving-side resonance coil that is configured to be supplied with power from the power supply-side resonance coil in a non-contact manner, wherein the power receiving-side resonance coil is part of a device resonator having a resonant frequency ω

    2, an intrinsic loss rate Γ

    2, and an intrinsic quality factor Q2

    2/(2Γ

    2);

    a power receiving loop that is configured to be supplied with power from the power receiving-side resonance coil in a non-contact manner;

    wherein the device resonator is configured to be movable relative to the source resonator over a range of distances D between the source resonator and the device resonator, andwherein the source resonator and the device resonator are configured to resonantly and wirelessly couple electromagnetic power from the source resonator to the device resonator using non-radiative electromagnetic induction having a coupling coefficient κ

    , wherein the intrinsic loss rates satisfy κ

    /√

    {square root over (Γ

    1Γ

    2)}>

    1 over the range of distances D, and wherein the coupling coefficient κ

    can be expressed as κ



    M/2√

    {square root over (LsLd)}, wherein ω

    is the frequency of the resonant coupling, Ls is the inductance of the power supply-side resonance coil, Ld is the inductance of the power receiving-side resonance coil, and M is the mutual inductance between the power supply-side resonance coil and the power receiving side resonance coil.

View all claims
  • 3 Assignments
    ×
    ×

    Thank you for your feedback

    ×
    ×