Electrical generator for wind turbine

• US 8,373,298 B2
• Filed: 06/15/2010
• Issued: 02/12/2013
• Est. Priority Date: 04/20/2009
• Status: Expired due to Fees

• Current Assignee: Gerald L. Barber
• Original Assignee: Gerald L. Barber
• Inventors: Barber, Gerald L.
• Primary Examiner(s): Cuevas, Pedro J
• Application Number:
  US12/815,542
• Publication Number:
  US 20100264667A1
• Time in Patent Office: 973 Days
• Field of Search: 290/44, 290/55, 310/90.5
• US Class Current: 290/55
• CPC Class Codes: F03D 1/0608 characterised by their aerodynamic shape
• CPC Class Codes: F03D 80/60 Cooling or heating of wind motors
• CPC Class Codes: F03D 80/70 Bearing or lubricating arrangements
• CPC Class Codes: F03D 9/25 the apparatus being an electrical generator F03D9/22 takes precedence
• CPC Class Codes: F05B 2220/7066 via a direct connection, i.e. a gearless transmission
• CPC Class Codes: H02K 5/207 with openings in the casing specially adapted for ambient air
• CPC Class Codes: H02K 5/26 Means for adjusting casings relative to their supports
• CPC Class Codes: H02K 7/08 Structural association with bearings
• CPC Class Codes: H02K 7/1869 Linear generators; sectional generators
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

A wind turbine or other rotary device for generating electricity has its outer perimeter constructed with coils that form a rotor (26) of an electrical generator. A stator assembly (52) is positioned at the lower perimeter of the path of the rotor and includes stator halves that are juxtaposed the moving rotor for generating electricity. The stator halves include magnetic bearings that provide substantially no contact between the rotor and the stator, allowing the rotor to move with a minimum of resistance.

Claims

1. An electrical generator for a wheel mounted for rotation on a horizontal axis, said electrical generator comprising:

a circular rotor mounted on said wheel and extending concentrically about the horizontal axis for rotation with the wheel in a circular path about the horizontal axis,

a stator positioned at the circular path of said rotor shaped for receiving said rotor and generating electricity in response to the rotation of said rotor,

support means for movably supporting said stator, and

a magnet for moving said stator on said support means toward juxtaposition with said rotor in response to lateral movement of the rotor.

2. The electrical generator of claim 1, wherein said magnet includes

a series of rotor magnets mounted on said rotor with windings that develop a magnetic field, and

a pair of opposed stator magnets positioned on opposite sides of said circular path including windings that develop magnetic fields that oppose the magnetic fields of said rotor magnets.

3. The electrical generator of claim 2, and wherein said rotor is formed in series of arcuate segments.

4. The electrical generator of claim 2, and further including first biasing means engaging said stators for urging said stators toward said rotor.

5. The electrical generator of claim 4, and wherein said first biasing means comprises inflatable air bags.

6. The electrical generator of claim 4, and further including second biasing means engaging said stators for urging said stators away from said rotor.

7. The electrical generator of claim 6, and wherein said second biasing means comprises a spring.

8. The electrical generator of claim 2, and further including a spring in biased relationship with each of said stators for urging each of said stators away from said rotor, and inflatable air bags in biasing relationship with each of said stators configured for urging said stators toward said rotor.

9. The electrical generator of claim 2, and wherein said wheel is a wind turbine and includes a plurality of radially extending sails for catching the wind.

10. An electrical generator for a wheel mounted for rotation on a horizontal axis, said electrical generator comprising:

a circular rotor mounted on said wheel and extending concentrically about the horizontal axis for rotation with the wheel in a perimeter path about the horizontal axis, said circular rotor including radially extending opposed sides,

a stator positioned at the perimeter path of said rotor, said stator shaped for receiving said rotor and configured for generating electricity in response to the rotation of said rotor,

stator support means movably supporting said stator in response to lateral movements of said rotor at said stator, and

a magnet movable with said stator juxtaposed said rotor and configured for maintaining said stator in juxtaposition with said rotor.

11. The electrical generator of claim 10, wherein

said stator includes a pair of opposed stator housings positioned on opposite sides of said rotor, said stator housings each including a field coil opening facing said opposed sides of said rotor, and field coils positioned in each of said stator housings and facing said rotor through said field coil openings.

12. The electrical generator of claim 10, and further including biasing means for selectively urging said stator housings toward each other and toward said rotor, and second biasing means for continuously biasing said stator housings away from each other and away from said rotor.

13. The electrical generator of claim 10 and wherein said magnet comprises a pair of magnets positioned on opposite sides of said rotor in opposite polarity than said rotor and configured to maintain space between each said stator housing and said rotor.

14. The electrical generator of claim 10, and wherein said rotor is formed in series of arcuate segments.

15. An electrical generator mounted for rotation on a horizontal axis, comprising:

a circular rotor extending concentrically about the horizontal axis for rotation in a circular path about the horizontal axis, said circular rotor including radially extending opposed sides,

a stator positioned at said radially extending opposed sides of said rotor, and

magnetic means for moving said stator laterally in response to lateral movements of said rotor.

16. The electrical generator of claim 15 and further including

first biasing means for selectively urging said stator toward said rotor and for relieving the urging of said stator toward said rotor, and

second biasing means for continuously biasing said stator away from said rotor.

17. The electrical generator of claim 16 and wherein said first biasing means comprises inflatable air bags in biasing relationship with said stator configured for urging said stator toward said rotor.

18. The electrical generator of claim 16 and wherein said second biasing means comprises a spring in biased relationship with said stator for urging said stator away from said rotor.

19. The electrical generator of claim 16 and wherein said wheel is a wind turbine and includes a plurality of radially extending blades for catching the wind.

20. A method of generating electricity as described in claim 16, comprising generating a magnetic field with said rotor and urging said stator laterally with the magnetic field of said rotor.

21. An electrical generator for producing electricity comprising:

an annular rotor formed by a series of rotor segments, said rotor segments including coils, and said rotor segments extending about a lateral axis of rotation and rotatable through an arc of an annular path,

a stator positioned at said arc of said annular path of said segments, said stator including coils positioned on opposite sides of said arc of said annular path and shaped to receive there between said segments of said rotor, and

magnet means for moving said stator laterally in response to lateral movements of said rotor.