Method for production of electrical machine stator comprising preforming step, and corresponding wound stator

Patent metadata

Field	Value
Publication number	US-10523095-B2
Application number	US-201515304769-A
Country	US
Kind code	B2
Filing date	Apr 9, 2015
Priority date	Apr 17, 2014
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

The invention essentially relates to a method for the production of a winding of a stator (15) comprising a body equipped with slots (28), comprising: a supply step consisting in supplying a winding unit with a bundle of conductors (37); and a pre-forming step consisting in moving the winding unit in relation to the bundle of conductors (37), such as to obtain a bundle of conductors (37) having, for each phase winding (E1-E6), at least two loop structures (39) and at least three segment structures (38), two of the segment structures (38) being positioned such that they can be disposed in the same slot (28) of the stator (15) and the two loop structures (39) connecting said two segment structures (38) stacked on the third segment structure (38).

First claim

The invention claimed is:

1. A wound stator ( 15 ), comprising:
a body ( 16 ) provided with notches ( 28 ); and
a winding ( 17 ) formed from a layer comprising a plurality of phase windings (E 1 -E 6 );
the winding ( 17 ) comprising:
a regular winding part ( 46 ) in which, for each phase winding (E 1 -E 6 ), segment structures ( 38 ) are each connected via two loop structures ( 39 ) to two adjacent segment structures ( 38 ) situated in two different notches ( 28 ), and
an irregular winding part ( 47 ) in which, for each phase winding (E 1 -E 6 ), one of the segment structures ( 38 ) is connected via two loop structures ( 39 ) to two superimposed segment structures ( 38 ) superimposed radially relative to one another in one of the notches ( 28 ) such that, for each phase winding, the direction of running of each of the phase windings in the notches in the stator is inverted at an inversion notch, in which is disposed the segment structure ( 38 ) connected via the two loop structures ( 39 ) to the two superimposed segment structures ( 38 ).

2. The wound stator according to claim 1 , wherein, for at least one of the phase windings (E 1 -E 6 ) of the irregular winding part ( 47 ), at least one of the loop structures ( 39 ) has radial adjustments ( 50 ) such that the at least one of the loop structures of the phase windings (E 1 -E 6 ) does not overlap.

3. The wound stator according to claim 1 , wherein the segment structures ( 38 ) of two conductors ( 37 ) constituting a single phase winding (E 1 -E 6 ) are positioned alternately in an inner layer and an outer layer according to a circumference of the stator.

4. The wound stator according to claim 1 , wherein each of the phase windings (E 1 -E 6 ) is constituted by a single wire ( 44 ).

5. The wound stator according to claim 1 , wherein, for two adjacent notches ( 28 ) of a series of notches associated with one of the phase windings (E 1 -E 6 ), the winding ( 17 ) has two loop structures ( 39 ) situated on both sides of the stator ( 15 ) connecting the segment structures ( 38 ) of one of the notches ( 28 ) adjacent to those of the other.

6. The wound stator according to claim 5 , wherein the two loop structures ( 39 ) connect respectively a segment structure ( 38 ) belonging to an inner layer to a segment structure ( 38 ) belonging to an outer layer, and a segment structure ( 38 ) belonging to an outer layer to a segment structure ( 38 ) belonging to an inner layer.

7. The wound stator according to claim 1 , wherein the segment structures ( 38 ) have a square or rectangular cross-section, and the loop structures ( 39 ) have a round cross-section.

8. The wound stator according to claim 1 , wherein teeth ( 25 ) which delimit the notches ( 28 ) are without tooth roots.

9. The wound stator according to claim 1 , wherein the winding ( 17 ) is obtained by winding a winding layer ( 52 ) around N/2 stator turns ( 15 ), N being the number of layers of conductors ( 37 ) required in the wound stator ( 15 ), N being equal to two or more.

10. The wound stator according to claim 9 , wherein the number N of layers of conductors ( 37 ) is equal to four, six, or eight.

11. The wound stator according to claim 10 , wherein the number N of layers of conductors ( 37 ) is equal to eight.

12. A rotary electrical machine comprising a stator according to claim 1 .

13. The wound stator according to claim 2 , wherein segment structures ( 38 ) of two conductors ( 37 ) which constitute a single phase winding (E 1 -E 6 ) are positioned alternately in an inner layer and an outer layer according to a circumference of the stator.

14. The wound stator according to claim 2 , wherein each phase winding (E 1 -E 6 ) is constituted by a single wire ( 44 ).

15. The wound stator according to claim 3 , wherein each phase winding (E 1 -E 6 ) is constituted by a single wire ( 44 ).

16. The wound stator according to claim 2 , wherein, for two adjacent notches ( 28 ) of a series of notches associated with a phase winding (E 1 -E 6 ), the winding ( 17 ) has two loop structures ( 39 ) situated on both sides of the stator ( 15 ) connecting segment structures ( 38 ) of one of the notches ( 28 ) adjacent to those of the other.

17. The wound stator according to claim 3 , wherein, for two adjacent notches ( 28 ) of a series of notches associated with a phase winding (E 1 -E 6 ), the winding ( 17 ) has two loop structures ( 39 ) situated on both sides of the stator ( 15 ) connecting segment structures ( 38 ) of one of the notches ( 28 ) adjacent to those of the other.

18. The wound stator according to claim 4 , wherein, for two adjacent notches ( 28 ) of a series of notches associated with a phase winding (E 1 -E 6 ), the winding ( 17 ) has two loop structures ( 39 ) situated on both sides of the stator ( 15 ) connecting segment structures ( 38 ) of one of the notches ( 28 ) adjacent to those of the other.

Assignees

• Valeo Equip Electr Moteur
• Valeo Equipments Electriques Moteur

Inventors

• Darras Ludovic
• Ramet Vincent
• Duquesne Jean
• Even Denis
• Sapotille Larry

Classifications

• H02K15/026 Primary

  Wound cores · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K15/0478

  Electricity · mapped topic

• H02K15/0433 Primary

  of the wave winding type · CPC title