Maximizing Power Yield from Wireless Power Magnetic Resonators

• US 20110309685A9
• Filed: 09/14/2008
• Published: 12/22/2011
• Est. Priority Date: 03/02/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Nigel Power LLC (Qualcomm, Inc.)
• Inventors: Cook, Nigel P., Dominiak, Stephen, Sieber, Lukas, Widmer, Hanspeter
• Granted Patent: US 8,378,522 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Abstract

Magneto mechanical systems used for wireless power reception. A miniature moving magnet is placed in an oscillating magnetic field. Movement of the magnet causes power to be generated.

Claims

1. A wireless power receiver device, comprising:

a receiver portion, formed of plural electrical components, said plural magnetic receiving antennas, and a power output part,

wherein at least one of said electrical components is formed using a mechanical machining process which creates mechanical features forming said plural electrical components of 1 μ

m or less.

2. A receiver as in claim 1, wherein said feature includes an inductor.

3. A receiver as in claim 1, wherein said feature includes a capacitor.

4. A receiver as in claim 1, wherein said feature includes a magnet.

5. A receiver as in claim 4, wherein said magnet is mounted for movement under influence from an alternating magnetic field.

6. A receiver as in claim 5, wherein said plural components include an array of moving magnets.

7. A receiver as in claim 6, further comprising a single inductance coil shared among said array of magnets.

8. A receiver as in claim 5, wherein said magnet is radially symmetrical.

9. A wireless receiver, comprising:

a first portion, including a movable magnet, located in an location to receive an alternating magnetic field,

a magnetic part, adjacent said movable magnet, and in a location where movement of the movable magnet creates energy; and

an output port for power created by said moving magnet.

10. A receiver as in claim 9, further comprising a coil, and wherein said coil and said movable magnet are each less than 10 μ

m in overall size.

11. A receiver as in claim 9, wherein said magnet is smaller than 2 cm³.

12. A receiver as in claim 9, wherein there are a plurality of magnets arranged such that their outputs sum to create a power output.

13. A receiver as in claim 12, wherein said plurality of magnets collectively occupy a space of 2 cm³ or less.

14. A receiver as in claim 10, wherein said plurality of magnets are arranged in a two-dimensional array.

15. A receiver as in claim 9, wherein said moving magnet includes a torsion part, and a spring, the moving magnet moving under influence of the magnetic field, and further comprising at least one induction coil, located adjacent to moving magnet, and converting kinetic energy into electrical energy.

16. A receiver as in claim 9, wherein said magnet is radially symmetrical.

17. A receiver as in claim 12, where each said magnet is radially symmetrical.

18. A method of receiving power, comprising:

locating an array of movable magnets in a location to receive an alternating magnetic field;

using said movement of the moving magnet to create energy; and

using said energy created by said moving magnet to power a load in a portable electronic device.

19. A method as in claim 18, further comprising a single coil shared among said array of movable magnets.

20. A method as in claim 19, wherein said coil and said moving magnet are each less than 10 μ

m in overall size.

21. A receiver as in claim 18, wherein each said magnet is smaller than 2 cm³.

22. A receiver as in claim 18, wherein said plurality of magnets are arranged in a two-dimensional array.

23. A wireless power transmitting device, comprising:

a first portion, formed of a magnetic generator, and a high frequency generation system, having a number of components, wherein at least one of said components is formed using a mechanical machining process which creates features of 1 μ

m or less.

24. A device as in claim 23, wherein said features include an inductor.

25. A device as in claim 23, wherein said features include a capacitor.