Wireless power transmission

Patent metadata

Field	Value
Publication number	US-10819151-B2
Application number	US-201615284050-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Oct 3, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

One embodiment provides an apparatus for wireless power transmission, comprising: a resonator comprising: a three dimensional structure; and an energy storage mechanism operatively coupled to the three dimensional structure; wherein the three dimensional structure and energy storage mechanism produce standing electromagnetic waves upon driving the resonator. Other systems, methods, apparatuses, and products are described and claimed.

First claim

What is claimed is:

1. A system for wireless power transmission, comprising:
a cavity resonator comprising:
a three dimensional structure, wherein the three dimensional structure comprises a room, and at least a portion of the three dimensional structure comprises a conductive material, and
at least one energy storage mechanism operatively coupled to the three dimensional structure via a conductive object,
wherein the cavity resonator is driven at a frequency associated with a free space wavelength that is larger than the three dimensional structure, and wherein energy transfers between a magnetic field that resides within the three dimensional structure and an electric field that is substantially confined to the at least one energy storage mechanism.

2. The system of claim 1 , further comprising a coil distinct from the cavity resonator, wherein the coil injects one or more magnetic fields into the cavity resonator.

3. The system of claim 1 , wherein the energy storage mechanism comprises at least one capacitor.

4. The system of claim 3 , wherein the driving the cavity resonator comprises driving current into the at least one capacitor.

5. The system of claim 3 , wherein the at least one capacitor is coupled to the conductive object.

6. The system of claim 3 , wherein the at least one capacitor comprises a plurality of lumped capacitors.

7. The system of claim 1 , wherein the energy storage mechanism is located outside the three dimensional structure.

8. The system of claim 1 , wherein the cavity resonator comprises a quasi-static cavity resonator.

9. The system of claim 1 , wherein the at least one energy storage mechanism comprises more than one energy storage mechanism, and wherein each of the energy storage mechanisms are located at different locations within the three dimensional structure.

10. The system of claim 1 , wherein the three dimensional structure comprises a substantially metallic structure.

11. A method for wireless power transmission, comprising:
selecting a resonant frequency associated with a free space wavelength that is larger than a three dimensional structure, wherein the three dimensional structure comprises a room, and at least a portion of the three dimensional structure comprises a conductive material; and
driving, at the resonant frequency, a cavity resonator comprising the three dimensional structure and at least one energy storage mechanism to produce standing electromagnetic waves within the three dimensional structure,
wherein the at least one energy storage mechanism is operatively coupled to the three dimensional structure via a conductive object, and
wherein, in response to the driving, energy transfers between a magnetic field that resides within the three dimensional structure and an electric field that is substantially confined to the at least one energy storage mechanism.

12. The method of claim 11 , wherein the driving the cavity resonator comprises injecting, using a coil, one or more magnetic fields into the three dimensional structure.

13. The method of claim 11 , wherein the driving the cavity resonator comprises driving current into the at least one energy storage mechanism.

14. The method of claim 11 , wherein the electric field and the magnetic field are substantially uncoupled.

15. The method of claim 11 , wherein the at least one energy storage mechanism comprises a plurality of energy storage mechanisms, and wherein each of the energy storage mechanisms is located at a distinct location within the three dimensional structure.

16. The method of claim 11 , further comprising controlling a direction of the magnetic field by driving the cavity resonator with a predetermined phase offset.

17. A method for wireless power transmission, comprising:
driving a cavity resonator that produces an electromagnetic field in a three dimensional structure operatively coupled to at least one energy storage mechanism via a conductive object, wherein the three dimensional structure comprises a room, and at least a portion of the three dimensional structure comprises a conductive material, wherein the cavity resonator is driven at a resonant frequency associated with a free space wavelength that is larger than the three dimensional structure, and wherein energy transfers between a magnetic field that resides within the three dimensional structure and an electric field that is substantially confined to the at least one energy storage mechanism;
tuning at least one receiver to the resonant frequency; and
coupling the at least one receiver to the cavity resonator to produce a coupled system, wherein the coupled system transfers electromagnetic energy of the electromagnetic field between the cavity resonator and the at least one receiver.

18. The method of claim 17 , further comprising the at least one receiver detuning from the resonant frequency and decoupling from the cavity resonator to stop electromagnetic energy transfer to the at least one receiver.

19. The method of claim 17 , wherein the receiver comprises a coupling coil.

20. The method of claim 17 , wherein the tuning at least one receiver comprises tuning more than one receiver.

Assignees

• Disney Entpr Inc

Inventors

• Sample Alanson P
• Chabalko Matthew J

Classifications

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title

• H02J7/025

  Electricity · mapped topic