Wireless power transmission system
First Claim
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1. A system for wireless power transmission, the system comprising:
- a source coil configured to convert power provided by a power source into a magnetic field;
a metamaterial magnetic lens comprising a plurality of unit cell structures arranged in a superlattice, each unit cell structure of the plurality of unit cell structures comprising a split-ring resonator; and
at least one transmit coil, coupled to the source coil, configured to transmit the magnetic field through the metamaterial magnetic lens, wherein the magnetic field exhibits a magnetic flux,wherein the metamaterial magnetic lens is configured to collimate the magnetic flux of the magnetic field transmitted by the at least one transmit coil towards a receiver of a load.
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Abstract
Various aspects of the subject technology include a wireless power transmission design based on extended range near-field resonance coupling induction, where magnetic near-field range may be extended by several orders of magnitude. One element that may help to accomplish the near-field extension, in one aspect, is the addition of a transformational magnetic lens to the transmitter. The magnetic lens may be made of metamaterials with refractive index of for example, −1. It may recover and collimate the near-field evanescent, magnetic flux, effectively extending the near-field coupling distance by several orders of magnitude.
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Citations
18 Claims
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1. A system for wireless power transmission, the system comprising:
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a source coil configured to convert power provided by a power source into a magnetic field; a metamaterial magnetic lens comprising a plurality of unit cell structures arranged in a superlattice, each unit cell structure of the plurality of unit cell structures comprising a split-ring resonator; and at least one transmit coil, coupled to the source coil, configured to transmit the magnetic field through the metamaterial magnetic lens, wherein the magnetic field exhibits a magnetic flux, wherein the metamaterial magnetic lens is configured to collimate the magnetic flux of the magnetic field transmitted by the at least one transmit coil towards a receiver of a load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for wirelessly transmitting power, the method comprising:
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transmitting power from a source through a source coil configured to convert the power provided by the power source into a magnetic field; converting, at the source coil, the power into a magnetic field; and using a transmit coil to transmit the magnetic field through a metamaterial magnetic lens comprising a plurality of unit cell structures arranged in a superlattice, each unit cell structure of the plurality of unit cell structures comprising a split-ring resonator, wherein the magnetic field is transmitted at a resonance frequency of the transmit coil and the resonance frequency of the transmit coil is configured to correspond to that of a receive coil, and wherein the metamaterial magnetic lens is configured to collimate the magnetic field transmitted by the transmit coil towards the receiver coil. - View Dependent Claims (11, 12)
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13. A system for wireless power transmission, the system comprising:
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a source coil configured to convert the electrical energy into a magnetic field; a transmit coil, coupled to the source coil, configured to transmit the magnetic field wherein the magnetic field exhibits a magnetic flux; and a metamaterial magnetic lens comprising a plurality of unit cell structures arranged in a superlattice, each unit cell structure of the plurality of unit cell structures comprising a split-ring resonator, wherein the metamaterial magnetic lens is configured to collimate the magnetic flux of the magnetic field transmitted by the transmit coil. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification