Wireless power transmitting apparatus

• US 8,184,454 B2
• Filed: 12/09/2008
• Issued: 05/22/2012
• Est. Priority Date: 06/09/2008
• Status: Expired due to Fees

• Current Assignee: National Taipei University Of Technology
• Original Assignee: National Taipei University Of Technology
• Inventors: Mao, Shau-Gang
• Primary Examiner(s): Edmonds, Lisa Lea
• Assistant Examiner(s): CUNNINGHAM, XANTHIA
• Application Number:
  US12/330,521
• Publication Number:
  US 20090303693A1
• Time in Patent Office: 1,260 Days
• Field of Search: 361/730, 361/752, 361/800, 361/816, 361/818, 361/704, 361/707, 361/715, 361/719, 361/720, 361/690, 361/688, 361/641, 361/627, 307/104, 307/159, 307/151, 320/108
• US Class Current: 361/818
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless power transmitting apparatus for remotely transmitting energy is implemented with a closed metal housing and a plurality of conductive plates disposed within the closed metal housing. With the aid of a high impedance between the closed metal housing and the conductive plates, a surface having the high impedance is formed on both the closed metal housing and the conductive plates for constraining electromagnetic power within the closed metal housing from dissipating and being consumed. The wireless power transmitting apparatus is not merely able to effectively and uniformly restrict electromagnetic field energy to the closed metal housing with the aid of the high impedance, but is also be able to raise a power transmitting efficiency between a power emitting device and a power receiving device.

Claims

1. A wireless power transmitting apparatus comprising:

a metal housing having an irregular geometric shape;

a plurality of duplicate-distributed conductor slices disposed on a plurality of inner surfaces of the metal housing;

at least one power emitting device disposed at an inner side of the metal housing for wirelessly transmitting power; and

at least one power receiving device disposed at the inner side of the metal housing for receiving transmitted power from the power emitting device,

the at least one power receiving device comprising;

at least one energy storage element for storing power received by the at least one power receiving device.

2. The wireless power transmitting apparatus of claim 1 wherein the metal housing comprises:

an upper case;

a lower case; and

a plurality of side walls;

wherein the plurality of inner surfaces, on which the plurality of duplicate-distributed conductor slices are disposed, are located at the plurality of side walls.

3. The wireless power transmitting apparatus of claim 2 wherein the upper case is disposed on the metal housing in a detachable manner.

4. The wireless power transmitting apparatus of claim 2 wherein the lower case is disposed on the metal housing in a detachable manner.

5. The wireless power transmitting apparatus of claim 2 wherein at least one of the plurality of side walls is disposed on the metal housing in a detachable manner.

6. The wireless power transmitting apparatus of claim 1 wherein the plurality of conductor slices are implemented with a plurality of polygon-shaped conductor slices.

7. The wireless power transmitting device of claim 1 wherein there is a gap between any two neighboring conductor slices on a same inner surface of the metal housing.

8. The wireless power transmitting device of claim 2 wherein the metal housing is a pillar-shaped metal housing;

wherein the pillar-shaped metal housing, the upper case and the lower case form a polygon-shaped structure, and the upper case and the lower case are symmetric with each other in shape.

9. The wireless power transmitting apparatus of claim 8 wherein the plurality of conductor slices disposed on the inner surfaces located on the plurality of side walls of the metal housing are implemented with artificial magnetic conductors (AMC).

10. The wireless power transmitting apparatus of claim 8 wherein a plurality of conductor slices are disposed on an inner surface of each of the upper case and the lower case.

11. The wireless power transmitting apparatus of claim 10 wherein the plurality of conductor slices disposed on the inner surface of each of the upper case and the lower case are implemented with perfect electric conductors (PEC).

12. The wireless power transmitting apparatus of claim 2 wherein the metal housing is a partial sphere-shaped housing.

13. The wireless power transmitting apparatus of claim 12 wherein the metal housing, the upper case and the lower case form a sphere-shaped housing, and the upper case and the lower case are symmetric with each other in shape.

14. The wireless power transmitting apparatus of claim 13 wherein the plurality of conductor slices disposed on the inner surfaces located on the plurality of side walls of the metal housing are implemented with artificial magnetic conductors (AMC).

15. The wireless power transmitting apparatus of claim 13 wherein the plurality of conductor slices disposed on the inner surface of each of the upper case and the lower case are implemented with perfect electric conductors (PEC).

16. The wireless power transmitting apparatus of claim 1 wherein the power receiving device and the power emitting device are disposed at a location inside the metal housing;

wherein the location of the power receiving device is corresponding to the location of the power emitting device inside the metal housing;

wherein the locations of both the power transmitting device and the power receiving device inside the metal housing are determined according to electromagnetic field distribution interior to the metal housing.

17. The wireless power transmitting device of claim 1 wherein a base plate is disposed between each one of the plurality of inner surfaces of the metal housing, on which the plurality of conductor slices are disposed.

18. The wireless power transmitting apparatus of claim 14 wherein a reflection phase on each of the plurality of inner surfaces of the metal housing is adjusted by adjusting a gap between any two neighboring conductor slices on the plurality of inner surfaces of the metal housing, a size of the plurality of conductor slices, a shape of the plurality of conductor slices, or material for the plurality of conductor slices.

19. The wireless power transmitting apparatus of claim 1 wherein the power emitting device comprises at least one antenna.

20. The wireless power transmitting apparatus of claim 19 wherein the antenna is implemented with a resonant antenna.

21. The wireless power transmitting apparatus of claim 20 wherein the resonant antenna for implementing the antenna is a monopole antenna, a microstrip antenna, or a dipole antenna.

22. The wireless power transmitting apparatus of claim 1 wherein the power receiving device further comprises at least one antenna for conducting received power into the energy storage elements.

23. The wireless power transmitting apparatus of claim 1 wherein the power emitting device emits power to the power receiving device in forms of heat transfer;

wherein the power receiving device is implemented with a heat-absorbing object for receiving the emitted power from the power emitting device by heating the heat-absorbing object with the received power.

24. The wireless power transmitting apparatus of claim 22 wherein the antenna is implemented with a resonant antenna.

25. The wireless power transmitting apparatus of claim 24 wherein the resonant antenna for implementing the antenna is a monopole antenna, a microstrip antenna, or a dipole antenna.

26. The wireless power transmitting apparatus of claim 8 wherein the pillar-shaped metal housing is a quadrilateral pillar-shaped housing.

27. The wireless power transmitting apparatus of claim 2 wherein the metal housing is a cylinder-shaped housing.

28. The wireless power transmitting apparatus of claim 27 wherein the upper case and the lower case are circular-shaped and are symmetric to each other in shape.