EFFICIENT ROBUST WIRELESS ENERGY TRANSFER
First Claim
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1. A method of transferring energy between a source coil and a drain coil, comprising:
- setting an initial resonant frequency of said source coil as a first condition;
setting said source coil and said drain coil in positions relative to each other to define an initial coupling coefficient therebetween, said initial coupling coefficient comprising a second condition; and
adiabatically changing at least one member of the group consisting of said first condition and said second condition while pumping energy into said source coil, thereby to transfer said pumped energy to said drain coil.
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Abstract
A method or apparatus for transferring energy between a source coil and a drain coil, comprises setting an initial resonant frequency of the source coil as a first condition; setting the source coil and said drain coil in positions relative to each other to define an initial coupling coefficient therebetween, so that the initial coupling coefficient comprises a second condition; and adiabatically changing one or both of the conditions while pumping energy into the source coil. The source coil energy is transferred to the drain coil over the course of the adiabatic change.
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Citations
26 Claims
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1. A method of transferring energy between a source coil and a drain coil, comprising:
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setting an initial resonant frequency of said source coil as a first condition; setting said source coil and said drain coil in positions relative to each other to define an initial coupling coefficient therebetween, said initial coupling coefficient comprising a second condition; and adiabatically changing at least one member of the group consisting of said first condition and said second condition while pumping energy into said source coil, thereby to transfer said pumped energy to said drain coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus for transferring energy comprising:
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a source coil having resonance variation circuitry for varying a resonant frequency of said source coil; a position unit for varying a position or orientation of said source coil so as to vary a coupling coefficient of said source coil with a respective drain coil to which said source coil is wirelessly coupled; and a controller configured to adiabatically vary at least one of said resonant frequency and said coupling coefficient while pumping energy into said source coil, thereby to transfer said pumped energy to said drain coil. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification