STATOR FOR ROTATING ELECTRICAL MACHINE

• US 20120274172A1
• Filed: 04/12/2012
• Published: 11/01/2012
• Est. Priority Date: 04/28/2011
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: KOGA, Kiyotaka
• Granted Patent: US 9,077,216 B2
• Time in Patent Office: Days
• US Class Current: 310/208
• CPC Class Codes: H02K 15/066 inserted perpendicularly to the axis of the slots or inter-polar channels
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/34 between conductors or between conductor and core, e.g. slot insulation

Abstract

A stator for a rotating electrical machine includes a stator core with a plurality of slots; and coils attached to the stator core. The coils are each structured by winding a covered conductor wire bundle around the stator core. The covered conductor wire bundle is structured by covering an outer circumference of a conductor wire bundle with a flexible insulating cover, the conductor wire bundle consisting of an assembly of a plurality of conductor wires. A plurality of the covered conductor wire bundles is disposed in each slot such that adjacent pairs of the covered conductor wire bundles are in contact with each other.

Claims

1. A stator for a rotating electrical machine comprising:

a stator core with a plurality of slots; and

coils attached to the stator core, wherein

the coils are each structured by winding a covered conductor wire bundle around the stator core,

the covered conductor wire bundle is structured by covering an outer circumference of a conductor wire bundle with a flexible insulating cover, the conductor wire bundle consisting of an assembly of a plurality of conductor wires, and

a plurality of the covered conductor wire bundles is disposed in each slot such that adjacent pairs of the covered conductor wire bundles are in contact with each other.

2. The stator for the rotating electrical machine according to claim 1, wherein cross-sections of the covered conductor wire bundles disposed in the same slots have different shapes, the cross-sections being orthogonal to a direction along which the covered conductor wire bundles extend.

3. The stator for the rotating electrical machine according to claim 1, wherein at least one of the covered conductor wire bundles disposed in each slot has a portion whose shape follows an inner wall surface of the slot, and is in surface contact with the inner wall surface at the portion.

4. The stator for the rotating electrical machine according to claim 1, wherein the conductor wires each have a circular cross-section orthogonal to a direction along which the conductor wires extend.

5. The stator for the rotating electrical machine according to claim 1, wherein a diameter of the cross-sections of the covered conductor wire bundles is larger than an open width of openings of the slots in a plane orthogonal to a direction along which the covered conductor wire bundles extend when the cross-sections orthogonal to the extending direction are circular.

6. The stator for the rotating electrical machine according to claim 1, wherein the covered conductor wire bundles are disposed in each slot while maintaining the shapes formed when the covered conductor wire bundles are pushed from an opening side of the slot that is open in a direction orthogonal to a direction along which the covered conductor wire bundles extend.

7. The stator for the rotating electrical machine according to claim 1, wherein the conductor wires are bare wires.

8. The stator for the rotating electrical machine according to claim 1, wherein

the slots extend in an axial direction of a cylindrical core reference plane of the stator core and are distributed in a circumferential direction of the core reference plane,

the stator core have a plurality of teeth formed between two adjacent slots, and

each tooth has two side surfaces that face in the circumferential direction and that are parallel to each other.

9. The stator for the rotating electrical machine according to claim 2, wherein at least one of the covered conductor wire bundles disposed in each slot has a portion whose shape follows an inner wall surface of the slot, and is in surface contact with the inner wall surface at the portion.

10. The stator for the rotating electrical machine according to claim 9, wherein the conductor wires each have a circular cross-section orthogonal to a direction along which the conductor wires extend.

11. The stator for the rotating electrical machine according to claim 10, wherein a diameter of the cross-sections of the covered conductor wire bundles is larger than an open width of openings of the slots in a plane orthogonal to a direction along which the covered conductor wire bundles extend when the cross-sections orthogonal to the extending direction are circular.

12. The stator for the rotating electrical machine according to claim 11, wherein the covered conductor wire bundles are disposed in each slot while maintaining the shapes formed when the covered conductor wire bundles are pushed from an opening side of the slot that is open in a direction orthogonal to a direction along which the covered conductor wire bundles extend.

13. The stator for the rotating electrical machine according to claim 12, wherein the conductor wires are bare wires.

14. The stator for the rotating electrical machine according to claim 13, wherein

the slots extend in an axial direction of a cylindrical core reference plane of the stator core and are distributed in a circumferential direction of the core reference plane,

the stator core have a plurality of teeth formed between two adjacent slots, and

each tooth has two side surfaces that face in the circumferential direction and that are parallel to each other.

15. The stator for the rotating electrical machine according to claim 2, wherein the conductor wires each have a circular cross-section orthogonal to a direction along which the conductor wires extend.

16. The stator for the rotating electrical machine according to claim 2, wherein a diameter of the cross-sections of the covered conductor wire bundles is larger than an open width of openings of the slots in a plane orthogonal to a direction along which the covered conductor wire bundles extend when the cross-sections orthogonal to the extending direction are circular.

17. The stator for the rotating electrical machine according to claim 2, wherein the covered conductor wire bundles are disposed in each slot while maintaining the shapes formed when the covered conductor wire bundles are pushed from an opening side of the slot that is open in a direction orthogonal to a direction along which the covered conductor wire bundles extend.

18. The stator for the rotating electrical machine according to claim 3, wherein the conductor wires each have a circular cross-section orthogonal to a direction along which the conductor wires extend.

19. The stator for the rotating electrical machine according to claim 3, wherein a diameter of the cross-sections of the covered conductor wire bundles is larger than an open width of openings of the slots in a plane orthogonal to a direction along which the covered conductor wire bundles extend when the cross-sections orthogonal to the extending direction are circular.

20. The stator for the rotating electrical machine according to claim 3, wherein the covered conductor wire bundles are disposed in each slot while maintaining the shapes formed when the covered conductor wire bundles are pushed from an opening side of the slot that is open in a direction orthogonal to a direction along which the covered conductor wire bundles extend.