POLYPHASIC MULTI-COIL GENERATOR

• US 20100019593A1
• Filed: 08/20/2009
• Published: 01/28/2010
• Est. Priority Date: 08/12/2004
• Status: Active Grant

• Current Assignee: DPM Technologies Incorporated
• Original Assignee: EXRO Technologies Inc.
• Inventors: RITCHEY, Jonathan Gale
• Granted Patent: US 8,212,445 B2
• Time in Patent Office: Days
• US Class Current: 310/112
• CPC Class Codes: H02K 1/08 Salient poles
• CPC Class Codes: H02K 1/14 Stator cores with salient poles
• CPC Class Codes: H02K 21/24 with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• CPC Class Codes: H02K 7/108 with friction clutches
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A polyphasic multi-coil generator includes a drive shaft, at least first and second rotors rigidly mounted on the drive shaft so as to simultaneously synchronously rotate with rotation of the drive shaft, and at least one stator sandwiched between the first and second rotors. A stator array on the stator has an array of electrically conductive coils mounted to the stator in a first angular orientation about the drive shaft. The rotors each have an array of magnets which are circumferentially equally spaced around the rotor and located at the same radially spacing with respect to the centre of the rotor and the drive shaft at a first angular orientation relative to the drive shaft. The arrays of magnets on adjacent rotors are off-set by an angular offset relative to one another.

Claims

1. A polyphasic multi-coil generator comprising:

a drive shaft;

a first rotor having a first aperture for receiving said drive shaft, said first rotor having a first array of magnets circumferentially spaced on said first rotor;

a second rotor having a second aperture for receiving said drive shaft, said second rotor having a second array of magnets circumferentially spaced on said second rotor, angular rotation of said first rotor being fixed relative to said second rotor and said first array of magnets being angularly offset in a drive shaft rotation direction from said second array of magnets;

first and second stators interleaved with said first rotor and said second rotor, each of said first and second stators having an aperture for receiving said drive shaft and a stator array including electrically conductive coils mounted circumferentially on said first and second stators, said first and second rotors and said first and second stators being provided in substantially parallel planes;

mechanisms for selectively coupling said first rotor and said second rotor to said drive shaft to rotate said first rotor and said second rotor relative to said first and second stators, rotation of said first rotor and said second rotor relative to said first and second stators for inducing a current in said electrically conductive coils of said first and second stators;

wherein a drive shaft input force required to rotate said first rotor and said second rotor relative to said first and second stators is reduced by attractive magnetic forces that rotate said first array of magnets and said second array of magnets toward next electrically conductive coils in said drive shaft rotation direction.

2. A polyphasic multi-coil generator as claimed in claim 1, wherein said mechanisms are current driven sensors including at least one solenoid.

3. A polyphasic multi-coil generator as claimed in claim 1, wherein said mechanisms are clutches mounted within hubs of said first rotor and said second rotor, said clutches being selectively engageable by a splined portion of said drive shaft.

4. A polyphasic multi-coil generator as claimed in claim 3, wherein said clutches include clutch splines, a clutch arm and clutch shoes, said clutch arm being rotatable relative to said clutch shoes to force said clutch shoes into engagement with said hubs and said clutch arm being rotatable with said clutch shoes to bring a rotational speed of said hubs into alignment with a rotational speed of said drive shaft.

5. A polyphasic multi-coil generator as claimed in claim 4, wherein said hubs include splines for receiving said splined portion of said drive shaft, said splined portion of said drive shaft being moved into engagement with said splines of said hubs when said rotational speed of said hubs matches said rotational speed of said drive shaft.

6. A polyphasic multi-coil generator as claimed in claim 3, wherein said splined portion of said drive shaft is axially movable by a shifter rod to engage clutches of successive rotors of said polyphasic multi-coil generator, said subsequent rotors being interleaved with successive stators.

7. A polyphasic multi-coil generator as claimed in claim 1, wherein each of said first array of magnets and said second array of magnets include pairs of magnets, each of said pairs of magnets including one magnet radially inner relative to said drive shaft and the other magnet radially outer relative to said drive shaft.

8. A polyphasic multi-coil generator as claimed in claim 7, wherein each of said pairs of magnets are aligned along a common radial axis extending radially outwardly of said drive shaft.

9. A polyphasic multi-coil generator as claimed in claim 1, wherein each of said electrically conductive coils is wrapped around a radial axis extending radially outward of said drive shaft.

10. A polyphasic multi-coil generator as claimed in claim 1, wherein said electrically conductive coils are aligned end to end in a concentric circle around said drive shaft.

11. A polyphasic multi-coil generator as claimed in claim 1, wherein said electrically conductive coils are mounted parallel relative to said drive shaft.

12. A polyphasic multi-coil generator as claimed in claim 1, wherein said electrically conductive coils are mounted slightly inclined from parallel relative to said drive shaft.

13. A polyphasic multi-coil generator as claimed in claim 1, wherein said first array of magnets is at least in part co-planar with said stator array of said first stator and said second array of magnets is at least in part co-planar with said stator array of said second stator.

14. A polyphasic multi-coil generator as claimed in claim 1, further comprising a plurality of successive stators interleaved with a plurality of successive rotors, wherein said electrically conductive coils of said plurality of successive stators are selectively electrically energized between open and closed circuits, rotational resistance for rotating said drive shaft being reduced when circuits are open and increased when the circuits are closed.

15. A polyphasic multi-coil generator comprising:

a drive shaft;

at least one generator stage including;

three rotors interleaved with three stators, said three rotors being coupled to said drive shaft and each of said three stators having an aperture for receiving said drive shaft, each of said three stators having a stator array including electrically conductive coils mounted circumferentially thereon, a first rotor having a first array of magnets, a second rotor having a second array of magnets and a third rotor having a third array of magnets, each array of magnets being circumferentially spaced on each of said three rotors, angular rotation of said three rotors being fixed relative to one another and said first array of magnets being angularly offset in a drive shaft rotation direction from said second array of magnets and said third array of magnets being angularly offset in said drive shaft rotation direction from said second array of magnets, said three rotors and said three stators being provided in substantially parallel planes and rotation of said three rotors relative to said three stators for inducing a current in said electrically conductive coils of said three stators;

mechanisms for coupling said first rotor, said second rotor and said third rotor to said drive shaft to rotate said first rotor, said second rotor and said third rotor relative to said three stators,

wherein a drive shaft input force required to rotate said three rotors relative to said three stators is reduced by attractive magnetic forces that rotate said first array of magnets, said second array of magnets and said third array of magnets toward next electrically conductive coils in said drive shaft rotation direction.

16. A polyphasic multi-coil generator as claimed in claim 15, wherein said mechanisms rigidly couple said first rotor, said second rotor and said third rotor to said drive shaft.

17. A polyphasic multi-coil generator as claimed in claim 15, wherein said mechanisms selectively couple said first rotor, said second rotor and said third rotor to said drive shaft.

18. A polyphasic multi-coil generator as claimed in claim 17, wherein said mechanisms are current driven sensors including at least one solenoid.

19. A polyphasic multi-coil generator as claimed in claim 17, said mechanisms are clutches mounted within hubs of said first rotor, said second rotor and said third rotor, said clutches being selectively engageable by a splined portion of said drive shaft.

20. A polyphasic multi-coil generator as claimed in claim 19, wherein said clutches include clutch splines, a clutch arm and clutch shoes, said clutch arm being rotatable relative to said clutch shoes to force said clutch shoes into engagement with said hubs and said clutch arm being rotatable with said clutch shoes to bring a rotational speed of said hubs into alignment with a rotational speed of said drive shaft.

21. A polyphasic multi-coil generator as claimed in claim 20, wherein said hubs include splines for receiving said splined portion of said drive shaft, said splined portion of said drive shaft being moved into engagement with said splines of said hubs when said rotational speed of said hubs matches said rotational speed of said drive shaft.

22. A polyphasic multi-coil generator as claimed in claim 19, wherein said splined portion of said drive shaft is axially movable by a shifter rod to engage clutches of successive stages of said polyphasic multi-coil generator, said successive stages being interleaved with successive stators.

23. A polyphasic multi-coil generator as claimed in claim 15, wherein said electrically conductive coils of successive generator stages are selectively electrically energized between open and closed circuits, rotational resistance for rotating the drive shaft being reduced when circuits are open and increased when the circuits are closed.

24. A polyphasic multi-coil generator as claimed in claim 15, wherein said each array of magnets include pairs of magnets, each of said pairs of magnets including one magnet radially inner relative to said drive shaft and the other magnet radially outer relative to said drive shaft.

25. A polyphasic multi-coil generator as claimed in claim 24, wherein each of said pairs of magnets are aligned along a common radial axis extending radially outwardly of said drive shaft.

26. A polyphasic multi-coil generator as claimed in claim 15, wherein each of said electrically conductive coils wrapped around a radial axis extending radially outward of said drive shaft.

27. A polyphasic multi-coil generator as claimed in claim 15, wherein said electrically conductive coils are aligned end to end in a concentric circle around said drive shaft.

28. A polyphasic multi-coil generator as claimed in claim 15, wherein said electrically conductive coils are mounted parallel relative to said drive shaft.

29. A polyphasic multi-coil generator as claimed in claim 15, wherein said electrically conductive coils are mounted slightly inclined from parallel relative to said drive shaft.