Wireless power transmission system
AssigneeLockheed Martin Corporation
InventorLi Leah Wang
Life of this patent
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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.
Claims18
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.
A method for wirelessly transmitting power, the method comprising:
- 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.
A system for wireless power transmission, the system comprising:
- 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.
Dependencies are inferred from the claim text.