Stator core, assembly comprising a stator core and slot linings, stator, electric machine and vehicle

Patent metadata

Field	Value
Publication number	US-12407200-B2
Application number	US-202118257155-A
Country	US
Kind code	B2
Filing date	Dec 8, 2021
Priority date	Dec 15, 2020
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A stator core for receiving a stator winding and slot linings. A respective slot lining has a first end extending along an axial direction, a second end situated opposite the first end and extending along the axial direction, a first end section extending from the first end toward the second end, and a second end section extending from the second end toward the first end and is overlapped by the first end section on an outer side of the respective slot lining. A multiplicity of slots are arranged in the circumferential direction is formed in the stator core, a respective slot having a first slot wall which delimits the slot in the circumferential direction, a second slot wall which is situated opposite the first slot wall and delimits the slot in the circumferential direction, and a slot base which delimits the slot in the radial direction.

First claim

The invention claimed is:

1. Stator core for receiving a stator winding and slot linings, wherein a respective slot lining has
a first end, which extends along an axial direction,
a second end, which is situated opposite the first end and extends along the axial direction,
a first end section, which extends from the first end in the direction of the second end, and
a second end section, which extends from the second end in the direction of the first end and is overlapped by the first end section on an outer side of the respective slot lining,
wherein a multiplicity of slots arranged in the circumferential direction is formed in the stator core, wherein a respective slot has
a first slot wall, which delimits the slot in the circumferential direction,
a second slot wall, which is situated opposite the first slot wall and delimits the slot in the circumferential direction, and
a slot base, which delimits the slot in the radial direction and forms
a first receiving space, which is configured to receive the first end section, and
a second receiving space, which directly adjoins the first receiving space, is delimited by the second slot wall and the slot base and is configured to receive the stator winding and the sections of the slot lining which are outside the first end section,
wherein
the first receiving space adjoins the second receiving space in the circumferential direction and is delimited by the first slot wall.

2. Stator core according to claim 1 , wherein
the first slot wall extends along a first straight line at least in some section or sections, the second slot wall extends along a second straight line, and the slot base extends along a third straight line, so that the first straight line and the second straight line form the legs of a trapezium, the base side of which lies on the third straight line, wherein the trapezium has a first interior angle, which is enclosed by the first straight line and the third straight line, and a second interior angle, which is enclosed by the second straight line and the third straight line.

3. Stator core according to claim 2 , wherein
the first slot wall extends in a straight line between a transition of the first slot wall into the slot base and a transition of the first slot wall into a radially inner boundary of the second receiving space.

4. Stator core according to claim 3 , wherein
the first interior angle is smaller than the second interior angle or is a rectangle.

5. Stator core according to claim 3 , wherein
the second interior angle is a rectangle.

6. Stator core according to claim 2 , wherein
the first slot wall has a first section, which extends along the first straight line, and a second section, which extends along a further straight line, wherein, at a predetermined radial position, the first straight line and the further straight line enclose a further interior angle, which is less than 180 degrees, preferably less than 179 degrees, particularly preferably less than 178 degrees.

7. Stator core according to claim 2 , wherein
the first interior angle is smaller than the second interior angle or is a rectangle.

8. Stator core according to claim 2 , wherein
the second interior angle is a rectangle.

9. Stator core according to claim 1 , wherein
the first end section is longer in cross section than the slot base and/or than a radially innermost distance between the slot walls.

10. Stator core according to claim 1 , wherein
the end sections are arranged radially closer to the slot base than to the radially innermost point of the slot walls and/or than to the radially innermost point of the slot lining.

11. Stator core according to claim 2 , wherein
the first end section is longer in cross section than the slot base and/or than a radially innermost distance between the slot walls.

12. Stator core according to claim 2 , wherein
the end sections are arranged radially closer to the slot base than to the radially innermost point of the slot walls and/or than to the radially innermost point of the slot lining.

13. Assembly comprising a stator core according to claim 2 and the slot linings, wherein the first end section of the slot linings is received in the first receiving space of the slots and those sections of the slot linings which are outside the first end section are received in the second receiving space of the slots.

14. Assembly comprising a stator core according to claim 1 and the slot linings, wherein the first end section of the slot linings is received in the first receiving space of the slots and those sections of the slot linings which are outside the first end section are received in the second receiving space of the slots.

15. The assembly as claimed in claim 14 , wherein
the first end section rests against the first slot wall and/or sections of the slot lining which are situated between the first end section and the second end section rest against the second slot wall and/or against the slot base.

16. Assembly according to claim 14 , wherein
a respective slot lining is formed from an electrically insulating material, in particular from an insulation paper.

17. Stator comprising
an assembly according to claim 14 and the stator winding, a section or sections of which extend within the second receiving space of a respective slot and which is surrounded by the slot lining received in the respective slot.

18. The stator as claimed in claim 17 , wherein
the stator winding is formed by shaped conductors, which are received in a radially layered manner in a respective slot.

19. Electric machine for driving a vehicle, comprising
a stator according to claim 17 and a rotor rotatably mounted inside the stator core.

20. Vehicle, comprising an electric machine according to claim 14 .

Assignees

• Valeo Eautomotive Germany Gmbh

Inventors

• Ciubotaru Cristian
• Dotz Boris
• Finger-Albert Christian

Classifications

• H02K3/345 Primary

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

• H02K3/30

  Windings characterised by the insulating material · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• B60Y2200/91

  Electric vehicles · CPC title