Stator for a rotating electrical machine

Patent metadata

Field	Value
Publication number	US-12308712-B2
Application number	US-201917058897-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Jun 7, 2018
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A method for manufacturing a stator of an electrical machine. The method including: a toothed ring having teeth joined together by bridges of material and defining between them slots open radially toward the outside, windings produced outside of the slots, and a yoke configured to be attached to the toothed ring. The method also including attaching at least one piece of sheet-form insulation to at least a portion of each of the windings, inserting said winding portions with the insulation into the slots via a radial movement directed toward the inside of the slots, and assembling the yoke onto the radially exterior surface of the ring to close the slots radially.

First claim

The invention claimed is:

1. A method for manufacturing a stator of an electrical machine, the method employing:
a toothed ring comprising teeth joined together by bridges of material and defining between them slots open radially toward the outside,
windings produced outside of the slots, and
a yoke configured to be attached to the toothed ring,
the method comprising:
attaching at least one piece of sheet-form insulation to at least a portion of each of the windings, the pieces of sheet-form insulation each comprising two opposing longitudinal edges extending substantially along the longitudinal axis of the associated winding portion, the winding portions being rectangular in transverse section and the two opposing longitudinal edges of each piece of sheet-form insulation extending over the one same face of the corresponding winding portion, the longitudinal edges of each piece of sheet-form insulation being in contact with one another on said face or opposing each other without being superposed,
inserting said winding portions with the insulation into the slots via a radial movement directed toward the inside of the slots, and
assembling the yoke onto the radially exterior surface of the ring to close the slots radially,

the winding portions that are inserted into the slots being each separated from the interior surface of the slot by at least two thicknesses of sheet-form insulation and being separated from each other by at least four thicknesses of sheet-form insulation.

2. The method as claimed in claim 1 , wherein once the windings with the insulation have been inserted into the slots, the insulation extends in each slot over the entire height of the slot.

3. The method as claimed in claim 2 , the pieces of sheet-form insulation protruding axially out of the slots on each side of the latter after insertion.

4. The method as claimed in claim 1 , each winding portion being placed in the corresponding slot in such a way that the longitudinal edges of the corresponding piece of sheet-form insulation extend over a face of the winding portion that is oriented toward the opening of the slot or toward a portion of a winding.

5. The method as claimed in claim 1 , wherein the pieces of sheet-form insulation are secured to the windings over at least part of their surface.

6. The method as claimed in claim 1 , wherein each piece of sheet-form insulation is secured to the winding portion at least at one of its longitudinal ends, using adhesive bonding on all or part of the piece of sheet-form insulation and/or on all or part of the corresponding winding portion, or using at least one adhesive tape.

7. The method as claimed in claim 1 , each winding portion being covered with a single piece of sheet-form insulation.

8. The method as claimed in claim 1 , wherein, during the step of inserting the winding portions, each slot accepts at least two winding portions.

9. The method as claimed in claim 8 , each winding portion being placed in the corresponding slot in such a way that the longitudinal edges of the corresponding piece of sheet-form insulation extend over a face of the winding portion that is oriented toward the other winding portion.

10. The method as claimed in claim 1 , the sheet-form insulation being made of a flexible electrically insulating material.

11. The method as claimed in claim 1 , the pieces of sheet-form insulation extending only over rectilinear winding portions.

12. The method as claimed in claim 1 , the winding portions being each inserted into the slots such that the longitudinal edges of the corresponding sheet-form insulation extends over a face of the winding portion that is oriented toward the opening of the slot.

13. A stator comprising:
a radially interior ring, comprising:
teeth creating between them slots open radially toward the outside, and
bridges of material each connecting two adjacent teeth at their base on the side of the airgap and defining the bottom of the slot between these teeth, and

a radially exterior yoke attached to the ring,
windings placed in a distributed manner in the slots, with, per slot, at least a winding of a first phase and a winding of a second phase different than the first phase,
for each winding portion within a slot, at least two pieces of sheet-form insulation,
the two pieces of sheet-form insulation surrounding each of the winding portions, these winding portions being separated from each other within the slot by at least four thicknesses of sheet-form insulation, the pieces of sheet-form insulation for each winding portion being distinct from the pieces of sheet-form insulation for any other winding portion.

14. A stator comprising:
a radially interior ring, comprising:
teeth creating between them slots open radially toward the outside, and
bridges of material each connecting two adjacent teeth at their base on the side of the airgap and defining the bottom of the slot between these teeth, and

a radially exterior yoke attached to the ring,
windings placed in a distributed manner in the slots, with, per slot, at least a winding of a first phase and a winding of a second phase different than the first phase,
a single piece of sheet-form insulation for each winding portion within a slot,
the winding portions within a slot being separated within the slot by at least two thicknesses of sheet-form insulation and being separated from each other by four thicknesses of sheet-form insulation.

15. A method for manufacturing a stator of an electrical machine, the method employing:
a toothed ring comprising teeth joined together by bridges of material and defining between them slots open radially toward the outside,
windings produced outside of the slots, and
a yoke configured to be attached to the toothed ring,
the method comprising:
attaching at least two pieces of sheet-form insulation directly to at least a portion of each of the windings,
inserting each winding portion with the at least two pieces of sheet-form insulation fastened thereon into the slots via a radial movement directed toward the inside of the slots, and
assembling the yoke onto the radially exterior surface of the ring to close the slots radially,

wherein the winding portions that are inserted into the slots are each separated from each other by at least four thicknesses of sheet form insulation.

16. The method as claimed in claim 15 , each winding portion being covered with at least two pieces of sheet-form insulation superposed with one another at least in part or with touching edges.

17. The method as claimed in claim 15 , each winding portion being covered with two pieces of sheet-form insulation formed into a U and fixed top to tail over the corresponding winding portion.

18. The method as claimed in claim 15 , wherein the winding portions that are inserted into the slots are each separated from the interior surface of the slot by at least one thickness of sheet-form insulation.

Assignees

• Leroy Somer Moteurs

Inventors

• Saint-Michel Jacques
• Jannot Xavier
• Gas Olivier
• Langlard Nicolas
• Desurmont Sebastien

Classifications

• H02K1/148 Primary

  Sectional cores (H02K1/141 takes precedence) · CPC title

• H02K15/021

  Magnetic cores · CPC title

• H02K15/064

  Windings consisting of separate segments · CPC title

• H02K3/34

  between conductors or between conductor and core, e.g. slot insulation · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title