Tunable wireless energy transfer for in-vehicle applications

  • US 8,957,549 B2
  • Filed: 11/03/2011
  • Issued: 02/17/2015
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A mobile wireless receiver for use with a first electromagnetic resonator coupled to a power supply, the first electromagnetic resonator having a mode with a resonant frequency ω

  • 1, an intrinsic loss rate Γ

    1, and a first Q-factor Q1

    1/2Γ

    1, the mobile wireless receiver comprising;

    a load associated with an electrically powered system that is disposed interior to a vehicle; and

    a second electromagnetic resonator configured to be coupled to the load and moveable relative to the first electromagnetic resonator, the second electromagnetic resonator having a mode with a resonant frequency ω

    2, an intrinsic loss rate Γ

    2, and a second Q-factor Q2

    2/2Γ

    2;

    wherein the second electromagnetic resonator is configured to be wirelessly coupled to the first electromagnetic resonator to provide resonant, non-radiative wireless power to the second electromagnetic resonator from the first electromagnetic resonator;

    wherein the second electromagnetic resonator is configured to be tunable during operation of the electrically powered system so as to at least one of tune the power provided to the second electromagnetic resonator and tune the power delivered to the load; and

    wherein the second electromagnetic resonator comprises tunable impedance circuits and port parameter measurement circuitry to measure input impedance or reflected power for use in actively adjusting impedance of the tunable impedance circuits during the operation of the electrically powered system in combination with tuning the power provided to the second electromagnetic resonator or tuning the power delivered to the load.

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