Alternator assembly

• US 6,091,231 A
• Filed: 06/19/1997
• Issued: 07/18/2000
• Est. Priority Date: 06/19/1997
• Status: Expired due to Term

• Current Assignee: R.E. Phelon Company, Inc.
• Original Assignee: R.E. Phelon Company, Inc.
• Inventors: Braun, Michael, Boivin, David, Prunty, David
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): MULLINS, BURTON S
• Application Number:
  US08/878,892
• Time in Patent Office: 1,125 Days
• Field of Search: 123/149 R, 123/149 D, 123/599, 310/179, 310/156, 310/181, 310/184, 310/185, 322/46, 322/29
• US Class Current: 322/46
• CPC Class Codes: H02K 11/049 Rectifiers associated with stationary parts, e.g. stator cores
• CPC Class Codes: H02K 21/22 with magnets rotating around the armatures, e.g. flywheel magnetos
• CPC Class Codes: H02M 7/00 Conversion of ac power input into dc power output; Conversion of dc power input into ac power output

Abstract

An electric current generation device includes a rotatable rotor including a magnet assembly establishing a magnetic field proximate the rotor. A stator includes at least one set of coils disposed with respect to the rotor so that rotation of the rotor moves the magnetic field with respect to the coils of the coil set to generate electric current flow in the coil set. The coil set includes an impedance component in communication with the electric current flow to limit the rate of increase of electric current flow generated by the coil set as the rotational speed of the rotor increases. The winding direction of at least one coil with respect to the magnetic field may be opposite the winding direction of the other coils with respect to the magnetic field. Two coil sets may be provided wherein the coils of a first coil set are wound so that the output of the first coil set is out of phase with respect of the output of a second coil set. A rectifier mechanism in operative communication with the first coil set and the second coil set rectifies and combines the output of the first coil set and the output of the second coil set.

Claims

1. An electric current generation device, said device comprising:

a rotatable rotor including a plurality of magnets arranged in an equiangularly spaced relationship and in alternating polarity so that said magnets establish a magnetic field proximate said rotor; and

a stator including at least two sets of coils electrically in parallel with each other and disposed with respect to said rotor so that rotation of said rotor moves said magnetic field with respect to the coils of said coil sets to generate electric current flow in said coil sets,

wherein at least one said coil in each said coil set is disposed with respect to said magnetic field so that it is electrically out of phase with other said coils in said coil set.

2. The device as in claim 1, wherein, in each said coil set, said at least one coil is 180°

out of phase with said other coils.

3. The device as in claim 1, including a capacitor operatively disposed across a coil of said coil set.

4. The device as in claim 3, wherein said capacitor is disposed across a plurality of said coils.

5. The device as in claim 1, wherein, in each said coil set, the winding direction of said at least one coil with respect to said magnetic field is opposite the winding direction of said other coils with respect to said magnetic field.

6. The device as in claim 5, wherein said other coils are wound in alternating opposite directions with respect to each other so that said other coils are electrically in phase with each other, and wherein said at least one coil is wound oppositely to said other coils with respect to said magnetic field so that said at least one coil is electrically out of phase with respect to said other coils.

7. The device as in claim 6, wherein said magnets are discrete with respect to each other.

8. The device as in claim 6, including more than one said at least one coil.

9. The device as in claim 6, wherein said other coils are disposed adjacent to each other and said at least one coil is disposed adjacent said other coils.

10. The device as in claim 6, wherein said coils of each said coil set are electrically connected in series.

11. The device as in claim 6, wherein said rotor includes an inner annular surface about which said magnets are arranged in alternating polarity, wherein said stator includes an annular member concentric with said inner annular surface of said rotor, and wherein said coils of said coil set are electrically connected in series and are disposed on said annular member so that said coils extend into said magnetic field.

12. An electric current generation device, said device comprising:

a rotatable rotor including a magnet assembly establishing a magnetic field proximate said rotor; and

a stator including a plurality of poles extending into said magnetic field and a set of coils electrically connected in series, each coil of said coil set being wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil set to generate electric current flow in said coil set,

wherein the winding direction of at least one said coil with respect to said magnetic field is opposite the winding direction of the other said coils with respect to said magnetic field, and wherein one end of said coil set is electrically grounded through said stator.

13. An electric current generation device, said device comprising:

a rotatable rotor including a plurality of magnets arranged in alternating polarity so that said magnets establish a magnetic field proximate said rotor; and

a stator including a plurality of poles extending into said magnetic field and two sets of coils electrically in parallel with each other, wherein the coils of each said coil set are electrically connected in series, each coil of each said coil set being wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil set to generate electric current flow in said coil set,

wherein, in each said coil set, the winding direction of at least one said coil with respect to said magnetic field is opposite the winding direction of the other said coils with respect to said magnetic field and wherein there are unequal numbers of said at least one coil and said other coils.

14. The device as in claim 13, wherein each said coil set includes more than one said at least one coil.

15. The device as in claim 13, wherein, in each said coil set, said other coils are disposed adjacent to each other and said at least one coil is disposed adjacent said other coils.

16. The device as in claim 15, including, in each said coil set, five said other coils and two said at least one coils.

17. The device as in claim 15, including, in each said coil set, six said other coils and two said at least one coils.

18. An electric current generation device, said device comprising:

a rotatable rotor having an inner annular surface and including a plurality of magnets arranged in alternating polarity about said inner annular surface to establish a magnetic field proximate said inner annular surface; and

a stator having an annular outer surface concentric with and opposing said inner annular surface of said rotor and including a plurality of poles extending from said annular outer surface toward said inner annular surface of said rotor into said magnetic field and two sets of coils electrically in parallel with each other, wherein the coils of each said coil set are electrically connected in series, each coil of each said coil set being wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil set to generate electric current flow in said coil set,

wherein, in each said coil set, a plurality of said coils comprising a first group of said coil set are wound in alternating opposite directions with respect to each other so that said coils of said first group are electrically in phase with each other, and wherein at least one said coil comprising a second group of said coils of said coil set is wound in an opposite direction to said first group with respect to said magnetic field so that said second group is electrically out of phase with said first group.

19. The device as in claim 18, wherein said second group includes a plurality of coils.

20. The device as in claim 18, wherein said coils in said first group are disposed adjacent to each other and said second group is disposed adjacent said first group.

21. An electric current generation device, said device comprising:

a rotatable rotor including a magnet assembly establishing a magnetic field proximate said rotor;

a stator including at least two sets of coils disposed with respect to said rotor so that rotation of said rotor moves said magnetic field with respect to the coils of said coil sets to generate electric current flow in said coil sets,

wherein the coils of a first said coil set are wound so that the output of said first coil set is out of phase with respect to the output of a second said coil set; and

a rectifier mechanism in operative communication with said first coil set and said second coil set, said rectifier mechanism configured to rectify and combine the output of said first coil set and the output of said second coil set,

wherein said coils of said first coil set are electrically connected in series, wherein said coils of said second coil set are electrically connected in series, and wherein one end of each of said first and said second coil set is electrically grounded and the other end of each of said first and second coil set is connected to said rectifier mechanism.

22. The device as in claim 21, wherein said rectifier mechanism includes a pair of diodes, an upstream end of each said diode being electrically connected to said other end of a respective one of said first coil set and said second coil set and the downstream ends of said diodes being electrically connected to each other.

23. The device as in claim 21, wherein said grounded end of each of said first coil set and said second coil set is connected to an internal ground.

24. An electric current generation device, said device comprising:

a rotatable rotor including a plurality of magnets arranged in alternating polarity so that said magnets establish a magnetic field proximate said rotor;

a stator including two sets of coils disposed with respect to said rotor so that rotation of said rotor moves said magnetic field with respect to the coils of said coil sets to generate electric current flow in said coil sets,

wherein the coils of a first said coil set are wound so that the output of said first coil set is 180°

out of phase with respect to the output of a second said coil set; and

a rectifier mechanism in operative communication with said first coil set and said second coil set, said rectifier mechanism configured to rectify and combine the output of said first coil set and the output of said second coil set.

25. The device as in claim 24, wherein said rectifier mechanism is configured to half-wave rectify said output of said first coil set and said output of said second coil set.

26. The device as in claim 24, wherein the winding direction of said coils of said first coil set with respect to said magnetic field is opposite to the winding direction of said coils of said second coil set with respect to said magnetic field.

27. The device as in claim 24, wherein, in each of said first coil set and said second coil set, at least one said coil of said coil set is disposed with respect to the other said coils of said coil set to limit electric current flow from said other coils.

28. The device as in claim 27, wherein, in each of said first coil set and said second coil set, said at least one coil is configured with respect to said other coils so that the voltage across said coil set when said rotor rotates is less than the aggregate voltage across said other coils and so that the total impedance of the respective said coil set when said rotor rotates is greater than the total impedance of said other coils.

29. The device as in claim 27, wherein each of said first coil set and said second coil set includes more than one said at least one coil.

30. The device as in claim 27, wherein, in each of said first coil set and said second coil set, the winding direction of said at least one coil with respect to said magnetic field is opposite the winding direction of said other coils with respect to said magnetic field.

31. The device as in claim 30, wherein

said rotor includes a plurality of magnets arranged in a spaced apart relationship and in alternating polarity to establish said magnetic field, and

in each of said first coil set and said second coil set,

said other coils are wound in alternating opposite directions with respect to each other so that said other coils are electrically in phase with each other, and

said at least one coil is wound oppositely to said other coils with respect to said magnetic field so that said at least one coil is electrically out of phase with respect to said other coils.

32. The device as in claim 31, wherein, in each of said first coil set and said second coil set, said other coils are disposed adjacent to each other and said at least one coil is disposed adjacent said other coils.

33. An electric current generation device, said device comprising:

a rotatable rotor including a plurality of magnets arranged in alternating polarity so that said magnets establish a magnetic field proximate said rotor;

a stator including a plurality of poles extending into said magnetic field and at least two sets of coils, wherein

the coils in each said coil set are electrically connected in series,

each coil of said coil sets is wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil sets to generate electric current flow in said coil sets, and

the coils of a first said coil set are wound so that the output of said first coil set is approximately 180°

out of phase with respect to the output of a second said coil set; and

a rectifier mechanism in operative communication with said first coil set and said second coil set, said rectifier mechanism configured to half-wave rectify and combine the output of said first coil set and the output of said second coil set.

34. The device as in claim 33, wherein the winding direction of said coils of said first coil set with respect to said magnetic field is opposite to the winding direction of said coils of said second coil set with respect to said magnetic field.

35. An electric current generation device, said device comprising:

a rotatable rotor having an inner annular surface and including a plurality of magnets arranged in alternating polarity about said inner annular surface to establish a magnetic field proximate said inner annular surface;

a stator having an outer annular surface concentric with and opposing said inner annular surface of said rotor and including a plurality of poles extending from said annular outer surface toward said inner annular surface of said rotor into said magnetic field and at least two sets of coils, wherein

the coils in each said coil set are electrically connected in series,

each coil of said coil sets is wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil sets to generate electric current flow in said coil sets,

the winding direction of coils of a first said coil set with respect to said magnetic field is opposite to the winding direction of coils of a second said coil set with respect to said magnetic field, and

in each of said first coil set and said second coil set,

the winding direction of at least one said coil of said coil set with respect to said magnetic field is opposite the winding direction of the other said coils of said coil set with respect to said magnetic field,

said other coils are wound in alternating opposite directions with respect to each other so that said other coils are electrically in phase with each other,

there are unequal numbers of said at least one coil and said other coils, and

said at least one coil is wound oppositely to said other coils with respect to said magnetic field so that said at least one coil is electrically out of phase with respect to said other coils; and

a rectifier mechanism in operative communication with said first coil set and said second coil set, said rectifier mechanism configured to half-wave rectify and combine the output of said first coil set and the output of said second coil set.

36. The device as in claim 35, wherein each of said first coil set and said second coil set includes five said other coils and two said at least one coils.

37. The device as in claim 35, wherein each of said first coil set and said second coil set includes six said other coils and two said at least one coils.

38. An electric current generation device, said device comprising:

a rotatable rotor having an inner annular surface and including a plurality of magnets arranged in a spaced apart relationship and in alternating polarity about said inner annular surface to establish a magnetic field proximate said inner annular surface;

a stator having an annular outer surface concentric with and opposing said inner annular surface of said rotor and including a plurality of poles extending from said annular outer surface toward said inner annular surface of said rotor into said magnetic field and two sets of coils electrically in parallel with each other, wherein the coils of each said coil set are electrically connected in series, each coil of each said coil set being wound about a respective said pole so that rotation of said rotor moves said magnetic field with respect to said coil set to generate electric current flow in said coil set,

wherein, in each said coil set, a plurality of said coils comprising a first group of said coil set are wound in alternating opposite directions with respect to each other so that said coils of said first group are electrically in phase with each other, and wherein at least one said coil comprising a second group of said coils of said coil set is wound in an opposite direction to said first group with respect to said magnetic field so that said second group is electrically out of phase with said first group; and

a full-wave rectifier mechanism in operative communication with said coil sets and configured to full-wave rectify the output of said coil sets.

39. The device as in claim 38, wherein said rectifier mechanism includes two full-wave rectifiers respectively in operative communication with said coil sets.

40. The device as in claim 38, wherein said full wave rectifier mechanism includes a diode bridge circuit.