Wireless energy transfer using field shaping to reduce loss
View Patent ↗In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where the field of at least one of the source resonator and the second resonator is shaped to avoid a loss-inducing object.
1. A system, comprising:
a source resonator optionally coupled to an energy source; and
a second resonator located a distance from the source resonator,
wherein the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and wherein the field of at least one of the source resonator and the second resonator is shaped using a conducting material and a magnetic material.
2. The system of claim 1 , wherein at least one of the source resonator and the second resonator have a quality factor, Q>100.
3. The system of claim 1 , wherein the source resonator Q is greater than 100 and the second resonator Q is greater than 100.
4. The system of claim 1 , wherein the square root of the resonator Q times the second resonator Q is greater than 100.
5. The system of claim 1 , comprising more than one resonator.
6. The system of claim 1 , comprising more than one second resonator.
7. The system of claim 1 , comprising more than three resonators.
8. The system of claim 1 , wherein the field is shaped to avoid a loss-inducing object.
9. The system of claim 8 , wherein the loss-inducing object is completely covered by the conducting material and the magnetic material.
10. The system of claim 8 , wherein the loss-inducing object is partially covered by the conducting material and the magnetic material.
11. The system of claim 8 , wherein the loss-inducing object is nearer to at least one of the source resonator and the second resonator, and wherein a portion of the loss-inducing object facing the nearer resonator is partially covered by the conducting material and the magnetic material.
12. The system of claim 8 , wherein the conducting material comprises a first layer that covers the loss-inducing object, and wherein the magnetic material comprises a second layer that covers the first layer.
13. The system of claim 8 , wherein the conducting material comprises a first layer that partially covers the loss-inducing object, and wherein the magnetic material comprises a second layer that partially covers the first layer.
14. The system of claim 8 , wherein the loss-inducing object is a mobile electronic device.
15. A method, comprising:
providing a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator,
coupling the source resonator and the second resonator to provide near-field wireless energy transfer among the source resonator and the second resonator, and
shaping the field of at least one of the source resonator and the second resonator using a conducting surface and a magnetic material.
16. The method claim 15 , wherein at least one of the source resonator and the second resonator have a quality factor, Q>100.
17. The method of claim 15 , wherein the source resonator Q is greater than 100 and the second resonator Q is greater than 100.
18. The method of claim 15 , wherein the square root of the source resonator Q times the second resonator Q is greater than 100.
19. The method of claim 15 , comprising more than one source resonator.
20. The method of claim 15 , comprising more than one second resonator.
21. The method of claim 15 , comprising more than three resonators.
22. The method of claim 15 , wherein the step of shaping is to avoid a loss-inducing object.
23. A system, comprising:
a resonator coupled to power and control circuitry;
wherein the resonator and the power and control circuitry are configured to provide near-field wireless energy transfer among other resonators,
and wherein the power and control circuitry is at least partially covered by high permeability materials and conducting surfaces to shape magnetic fields of the resonator around the power and control circuitry.