AMPG device for generation of electrical energy from vibrations, an AMPG device assembly, and a method to optimize the generation of said electrical energy

• US 20080174188A1
• Filed: 12/19/2007
• Published: 07/24/2008
• Est. Priority Date: 12/21/2006
• Status: Active Grant

• Current Assignee: Revibe Energy AB
• Original Assignee: Saab AB
• Inventors: Erichsen, Dan, Cederwall, Per
• Granted Patent: US 8,304,937 B2
• Time in Patent Office: Days
• US Class Current: 310/36
• CPC Class Codes: H02K 35/02 with moving magnets and stationary coil systems

Abstract

An AMPG device for generation of electrical energy, including a bobbin, at least one magnet, and at least one spring member. The magnet is arranged to be movable together with the spring member. The device is arranged so that when exposed to an acceleration component in a possible path of mobility of the first magnet, the first magnet will, due to its association with the spring member, move in an oscillating manner in relation to the bobbin, so as to generate electrical energy. The device is arranged to at a limiting position of the mobile magnet'"'"'s path of mobility a spring member with an equal or higher spring constant than the remainder portions of the magnet'"'"'s mobile path acting on the magnet. An AMPG device assembly includes several AMPG devices. A method to optimise the electrical output of the device adapts the device to the frequencies appearing in the application where it shall be used.

Claims

1. An accumulating motion pulse generator device for generation of electrical energy, comprising,

a bobbin,

at least one first magnet, and

at least one first spring member, wherein said first magnet is arranged to be movable together with said first spring member, said device is arranged so that when exposed to an acceleration component in a possible path of mobility of said first magnet, said first magnet will due to its association with said first spring member arranged to move in an oscillating manner in relation to said bobbin, so as to generate electrical energy, and

a second spring member at a limiting position of said mobile magnet'"'"'s path of mobility, for limiting said path of mobility.

2. The accumulating motion pulse generator device according to claim 1, wherein the second spring has an equal or higher spring constant than the spring constant of the first spring member.

3. The accumulating motion pulse generator device according to claim 1, wherein the said first magnet comprises Neodymium.

4. The accumulating motion pulse generator device according to claim 1, wherein said second spring comprises a helical spring.

5. The accumulating motion pulse generator device according to claim 1, wherein said second spring member comprises a plate spring.

6. The accumulating motion pulse generator device according to claim 1 wherein said second spring comprises a cloth, such as a rubber cloth.

7. The accumulating motion pulse generator device according to claim 1, wherein said second spring comprises second magnets, with reversed magnetic field to each other so as to act as a spring.

8. The accumulating motion pulse generator device according to claim 1, wherein said first spring comprises a spiral spring.

9. The accumulating motion pulse generator device according to claim 8, wherein said second spring comprises a plate spring member comprised in said first spring.

10. The accumulating motion pulse generator device according to claim 1, wherein said second spring comprises a combination of second magnets and mechanical springs.

11. The accumulating motion pulse generator device of according to claim 7, wherein said second magnets comprises Neodymium.

12. The accumulating motion pulse generator device according to claim 1, wherein the outer shape of the accumulating motion pulse generator device is arranged so that said accumulating motion pulse generator device is mountable in a standard holder for a battery for use in a standard battery demanding application.

13. The accumulating motion pulse generator device according to claim 12, wherein the outer shell of the accumulating motion pulse generator device comprises a high friction material.

14. The accumulating motion pulse generator device of according to claim 13, wherein the shell comprises elastomer.

15. The accumulating motion pulse generator device of according to claim 13, wherein the shell comprises rubber.

16. The accumulating motion pulse generator device according to claim 1, wherein the device is optimized for collection of acceleration components in its transversal direction by comprising a rotor with an eccentric mass balance, said rotor comprises said first magnet.

17. The accumulating motion pulse generator device according to claim 16, wherein the first spring member is a spiral spring associated with said rotor.

18. The accumulating motion pulse generator device according to claim 16, wherein the first spring member comprises a pair of spiral springs, oriented towards each other in opposite direction.

19. The accumulating motion pulse generator device according to claim 1, wherein the device is optimized for collection of acceleration components in its longitudinal direction, by associating said first magnet with a spring member of helical type allowing said first magnet to move close to said bobbin in the longitudinal direction of said device.

20. The accumulating motion pulse generator device according to claim 1 wherein the device comprises a bobbin having a core arranged to guide the changing magnetic field through the coil in the bobbin.

21. The accumulating motion pulse generator device according to claim 20, wherein the core is laminated.

22. The accumulating motion pulse generator device according to claim 20, wherein the core comprises μ

-metal.

23. The accumulating motion pulse generator device according to claim 1, wherein one first magnet is mounted close to another first magnet with essentially the reversed magnetic field direction so as to provide for achieving a quick change of magnetic field, when the first magnets with reversed magnetic fields passes the gap in the core which passes through the bobbin.

24. An accumulating motion pulse generator device according to claim 23, comprising a plurality of first magnets mounted close to each other at equally distances between each other, with alternating magnetic field directions.

25. A printed circuit board, comprising:

at least one accumulating motion pulse generator device comprising a bobbin, at least one first magnet, and at least one first spring member, wherein said first magnet is arranged to be movable together with said first spring member, said device is arranged so that when exposed to an acceleration component in a possible path of mobility of said first magnet, said first magnet will due to its association with said first spring member arranged to move in an oscillating manner in relation to said bobbin, so as to generate electrical energy, and a second spring member at a limiting position of said mobile magnet'"'"'s path of mobility for limiting said path of mobility.

26. An accumulating motion pulse generator device assembly comprising

at least two of the accumulating motion pulse generator devices each comprising a bobbin, at least one first magnet, and at least one first spring member, wherein said first magnet is arranged to be movable together with said first spring member, said device is arranged so that when exposed to an acceleration component in a possible path of mobility of said first magnet, said first magnet will due to its association with said first spring member arranged to move in an oscillating manner in relation to said bobbin, so as to generate electrical energy, and a second spring member at a limiting position of said mobile magnet'"'"'s path of mobility, for limiting said path of mobility, wherein the accumulating motion pulse generator devices are mounted angularly displaced relative to each other, whereby the AMPG assembly is able to collect acceleration components in more than one direction.

27. A method to optimize the electrical output from an accumulating motion pulse generator device, the method comprising:

determining a frequency range of the vibrations emerging from an application in which the accumulating motion pulse generator device is intended to be used,

adapting at least one resonant frequency of the accumulating motion pulse generator to the determined frequency range, and

using the accumulating motion pulse generator device in an application with vibrations in a frequency interval comprising said measured frequency of said application.

28. The method according to claim 27, the accumulating motion pulse generator device is used as a selfpowered motion sensor.

29. The method according to claim 27, wherein the accumulating motion pulse generator device fed with electrical current and thereby is used as an oscillating electrical motor.

30. The method according to claim 27, wherein the accumulating motion pulse generator device is connected to an amount of load, suppressing unwanted motions so that it will work as a passive damper.

31. The method according to claim 27, wherein the accumulating motion pulse generator device is suppressing unwanted motions in accordance to a connected power signal so that it will work as an active damper.