Wireless energy transfer over distances to a moving device
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=ω
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=ω
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.
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Abstract
Described herein are embodiments of a source resonator coupled to an energy source generating an oscillating near field region; and at least one device resonator optionally coupled to at least one energy drain and freely moving within the near field region of the source resonator. The source resonator and the at least one device resonator may be coupled to transfer electromagnetic energy wirelessly from said source resonator to said at least one device resonator as the at least one device resonator moves freely within the near field region, where the source resonator and the at least one device resonator may be coupled to provide κ/sqrt(Γ1Γ2)>0.2 over an operating region.
433 Citations
40 Claims
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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=ω
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=ω
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 Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method, comprising:
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providing a source resonator coupled to an energy source and generating a near field region comprising a temporally oscillating magnetic field; and providing at least one device resonator coupled to at least one energy drain and freely moving within the near field region of the source resonator, wherein the source resonator and the at least one device resonator are 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,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=ω
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=ω
2/(2Γ
2), andwherein the source resonator and the at least one device resonator are coupled to provide 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 Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification