Stator assembly, motor and vehicle

Patent metadata

Field	Value
Publication number	US-11456641-B2
Application number	US-201816652324-A
Country	US
Kind code	B2
Filing date	Sep 29, 2018
Priority date	Sep 29, 2017
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

A stator assembly, a motor, and a vehicle are disclosed. The stator assembly includes: a cylindrical stator core, where multiple stator slots spaced out along a circumferential direction of the stator core exist on the stator core; and a stator winding, where the stator winding includes multiple conductor segments. Each conductor segment includes an intra-slot part disposed in a stator slot of the stator core, and a first end and a second end that are disposed outside the stator core. The intra-slot part is connected between the first end and the second end, and the second ends of the multiple conductor segments form a welding end. All lead-out lines of each phase of the stator winding are located on the welding end.

First claim

What is claimed is:

1. A stator assembly, comprising:
a cylindrical stator core, wherein multiple stator slots spaced out along a circumferential direction of the stator core exist on the stator core; and
a stator winding, wherein the stator winding comprises multiple conductor segments, each of the conductor segments comprises an intra-slot part disposed in a stator slot of the stator core, a first end and a second end that are disposed outside the stator core, the intra-slot part is connected between the first end and the second end, the second end of each of the multiple conductor segments forms a welding end, and a lead-out line from each phase of the stator winding is located at the welding end, wherein:
star point lines of each phase of the stator winding are located at the welding end;
the stator assembly further comprises a neutral line, and the neutral line is connected to each of the star point lines; and
terminals of the star point lines of each phase of the stator winding extend outward in an axial direction of the stator core and form axial protrusions, and the neutral line is connected to each of the axial protrusions.

2. The stator assembly according to claim 1 , wherein a shape of a cross section of the conductor segment is rectangular; the conductor segments are U-shaped conductor segments, and each U-shaped conductor segment comprises a first intra-slot part and a second intra-slot part that are disposed in the stator slot, the first end is a U-shaped bend part that connects one end of the first intra-slot part and one end of the second intra-slot part; the U-shaped bend part of each U-shaped conductor segment forms a hairpin end of the stator winding, and the other end of the first intra-slot part and the other end of the second intra-slot part extend to form the welding end of the stator winding.

3. The stator assembly according to claim 1 , wherein the star point lines of each phase of the stator winding are connected through the neutral line.

4. The stator assembly according to claim 1 , wherein the star point lines of each phase of the stator winding are in surface contact with and welded to the neutral line.

5. The stator assembly according to claim 1 , wherein the axial protrusions exceed an end of the welding end by a preset distance, and the preset distance is greater than or equal to a length of the neutral line in the axial direction of the stator core.

6. The stator assembly according to claim 1 , wherein terminals of the star point lines of each phase of the stator winding extend outward radially around the stator core and bend at a preset angle to form radial protrusions, and the neutral line is connected to each of the radial protrusions.

7. The stator assembly according to claim 6 , wherein the radial protrusions exceed an outermost layer of the stator winding by a preset distance, and the preset distance is greater than or equal to a length of the neutral line in a radial direction of the stator core.

8. The stator assembly according to claim 1 , wherein the neutral line forms a shape of an arc segment, and a cross section of the neutral line is circular or rectangular.

9. The stator assembly according to claim 1 , wherein the neutral line comprises an arc-shaped connector and multiple antennae, the multiple antennae are respectively connected to the star point lines of each phase of the stator winding, and the arc-shaped connector connects the multiple antennae.

10. The stator assembly according to claim 9 , wherein a gap exists radially between the arc-shaped connector and the outermost layer of the stator winding.

11. The stator assembly according to claim 1 , wherein the star point lines of the stator winding are indirectly connected to the neutral line through at least one connection block.

12. The stator assembly according to claim 11 , wherein the star point lines are in surface contact with and welded to the connection block, and the neutral line is in surface contact with and welded to the connection block.

13. The stator assembly according to claim 11 , wherein two opposite surfaces of the connection block are respectively connected to the star point lines and the neutral line, and the two opposite surfaces of the connection block remain parallel.

14. The stator assembly according to claim 13 , wherein terminals of the star point lines of each phase of the stator winding extend in an axial direction of the stator core, a radial inner surface of each connection block is welded to a radial outer surface of the terminals of the star point lines, and a radial outer surface of the connection block is welded to the neutral line.

15. The stator assembly according to claim 11 , wherein terminals of the star point lines extend in an axial direction of the stator core; and
the connection block is constructed in a U shape and comprises an inner leg and an outer leg that are radially separated, the inner leg is welded to a terminal of the star point lines, and the neutral line is welded between the inner leg and the outer leg.

16. The stator assembly according to claim 1 , wherein multiple connection blocks exist and are connected between the star point lines and the neutral line one by one.

17. A motor, comprising the stator assembly according to claim 1 .

18. A vehicle, comprising the motor according to claim 17 .

Assignees

• Byd Co Ltd

Inventors

• Tian Kaili
• You Bin
• Qi Wenming

Classifications

• H02K1/165

  Shape, form or location of the slots · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K3/12 Primary

  arranged in slots · CPC title

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K2203/06

  Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations · CPC title