Wireless energy transfer across variable distances
First Claim
1. A method of transferring electromagnetic energy comprising:
- providing a first electromagnetic resonator receiving energy from a power supply, said first electromagnetic resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, an inductance L1, an ohmic component of resistance R1ohm, a radiative component of resistance R1rad, and a first Q-factor Q1=ω
1L1/(R1ohm+R1rad), and generating a near field region comprising a temporally oscillating magnetic field;
providing a second electromagnetic resonator being positioned at variable distances from said first electromagnetic resonator and not electrically wired to said first electromagnetic resonator, said second electromagnetic resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, an inductance L2, an ohmic component of resistance R2ohm, a radiative component of resistance R2rad, and a second Q-factor Q2=ω
2L2/(R2ohm+R2rad); and
wirelessly transferring electromagnetic energy from said first electromagnetic resonator to said second electromagnetic resonator over a variable distance D as the second electromagnetic resonator moves freely within the near-field region, and wherein R1ohm>
R1rad, and R2ohm>
R2rad and at least one of Q1 and Q2 is greater than 100.
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Accused Products
Abstract
Described herein are embodiments of transferring electromagnetic energy that includes a first electromagnetic resonator receiving energy from an external power supply, said first resonator having a resonant frequency ω1, an intrinsic loss rate Γ1, and a first Q-factor Q1=ω1L1/(R1ohm+R1rad), generating an oscillating near field region, a second electromagnetic resonator being positioned at variable distances from said first resonator and not electrically wired to said first resonator, said second resonator having a resonant frequency ω2, an intrinsic loss rate Γ2, and a second Q-factor Q2=ω2L2/(R2ohm+R2rad). Electromagnetic energy may be transferred from said first resonator to said second resonator over a variable distance D that may be within the near-field region of the first resonator structure, and wherein R1ohm>R1rad, and R2ohm>R2rad.
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Citations
22 Claims
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1. A method of transferring electromagnetic energy comprising:
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providing a first electromagnetic resonator receiving energy from a power supply, said first electromagnetic resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, an inductance L1, an ohmic component of resistance R1ohm, a radiative component of resistance R1rad, and a first Q-factor Q1=ω
1L1/(R1ohm+R1rad), and generating a near field region comprising a temporally oscillating magnetic field;providing a second electromagnetic resonator being positioned at variable distances from said first electromagnetic resonator and not electrically wired to said first electromagnetic resonator, said second electromagnetic resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, an inductance L2, an ohmic component of resistance R2ohm, a radiative component of resistance R2rad, and a second Q-factor Q2=ω
2L2/(R2ohm+R2rad); andwirelessly transferring electromagnetic energy from said first electromagnetic resonator to said second electromagnetic resonator over a variable distance D as the second electromagnetic resonator moves freely within the near-field region, and wherein R1ohm>
R1rad, and R2ohm>
R2rad and at least one of Q1 and Q2 is greater than 100. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system of transferring electromagnetic energy comprising:
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a first electromagnetic resonator receiving energy from a power supply, said first electromagnetic resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, an inductance L1, an ohmic component of resistance R1ohm, a radiative component of resistance R1rad, and a first Q-factor Q1=ω
1L1/(R1ohm+R1rad), and generating a near field region comprising a temporally oscillating magnetic field;a second electromagnetic resonator being positioned at variable distances from said first electromagnetic resonator and not electrically wired to said first electromagnetic resonator, said second electromagnetic resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, an inductance L2, an ohmic component of resistance R2ohm, a radiative component of resistance R2rad, and a second Q-factor Q2=ω
2L2/(R2ohm+R2rad),wherein the first and second electromagnetic resonators are coupled to wirelessly transfer electromagnetic energy from said first electromagnetic resonator to said second electromagnetic resonator over a variable distance D as the second electromagnetic resonator moves freely within the near-field region, and wherein R1ohm>
R1rad, and R2ohm>
R2rad and at least one of Q1 and Q2 is greater than 100. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification