Electric machine winding assembly

Patent metadata

Field	Value
Publication number	US-11018545-B2
Application number	US-201816053934-A
Country	US
Kind code	B2
Filing date	Aug 3, 2018
Priority date	Aug 3, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

An electric machine winding assembly including a stator and windings is provided. The stator may define a central axis. The windings may extend from the stator and each may include a pair of conductor ends. Each conductor end may include a minor side and a major side. The windings are arranged with the stator such that each of the major sides are aligned along a circumferential conductor axis relative to the central axis to facilitate welding adjacent conductor ends to one another. Each of the windings may further include two portions defining a U shape. Each of the two portions may include a lower portion, a mid-portion, and an upper portion. One of the mid-portions may include a first bend defining a twist shape to orient the major sides of one of the pair of conductor ends along the circumferential conductor axis.

First claim

What is claimed is:

1. An electric machine winding assembly comprising:
a stator defining a central axis; and
windings extending from within the stator, each coil including a pair of conductor ends, each conductor end including a minor side and a major side,
wherein the windings are arranged with the stator such that each of the major sides are aligned along a circumferential conductor axis relative to the central axis to facilitate welding adjacent conductor ends to one another.

2. The assembly of claim 1 , wherein each coil of the windings further includes two portions defining a U shape, wherein each of the two portions includes a lower portion, a mid-portion, and an upper portion, and wherein one of the mid-portions includes a first bend defining a twist shape to orient the major sides of one of the pair of conductor ends along the circumferential conductor axis.

3. The assembly of claim 2 , wherein the other of the mid-portions defines an upward bend shape to orient the major sides of the other of the pair of conductor ends along the circumferential conductor axis.

4. The assembly of claim 1 , wherein the windings further include a second pair of conductor ends, each including a minor and a major side, and wherein the major sides of each of the second pair of conductor ends are radially spaced from the major sides of the pair of conductor ends to define an insulation gap therebetween and sized to receive an insulation layer.

5. The assembly of claim 1 , wherein the windings further include at least two pairs of windings circumferentially spaced from one another to define a clamp gap therebetween and sized to receive a portion of a clamp tool to compress pairs of conductor ends of each of the at least two pairs of windings toward one another.

6. The assembly of claim 1 , wherein the stator further defines one or more circumferential stator axes about the central axis, and wherein the circumferential conductor axis is substantially parallel to one of the one or more circumferential stator axes.

7. A vehicle electric machine winding assembly comprising:
a stator defining a central axis and one or more circumferential axes about the central axis; and
at least two pairs of coils extending from the stator, each including first and second conductor ends and one of the two pairs of coils including an upper portion including a first bend to orient one of the first and second conductor ends along one of the one or more circumferential axes for welding to one another.

8. The assembly of claim 7 , wherein major sides of each of the at least two pairs of coils are radially spaced from one another to define an insulation gap therebetween and sized to receive an insulation layer.

9. The assembly of claim 7 , wherein each of the coils further includes a lower portion and a mid-portion, and wherein the other upper portion includes a second bend shaped to orient a plane defined by a first face of a respective conductor end substantially parallel with a second face of a respective upper portion.

10. The assembly of claim 7 , wherein each of the coils further includes a lower portion and a mid-portion, wherein each of the windings includes a second bend orienting a respective mid-portion substantially parallel to the central axis.

11. The assembly of claim 7 , wherein each of the first and second conductor ends includes a minor side shorter than a major side, and wherein each of the major sides are aligned with one another along one of the one or more circumferential axes.

12. The assembly of claim 7 , wherein the windings further include at least three pairs of coils each including first and second conductor ends, and wherein each of the at least three pairs of coils are circumferentially spaced from one another to define a clamp gap between each of the at least three pairs of coils sized to receive a portion of a clamp tool to compress respective first and second connector ends toward one another.

13. The assembly of claim 7 , wherein the first bend defines a twist shape.

14. The assembly of claim 7 , wherein the other of the two pairs of coils includes a second upper portion including a third bend to orient a first plane defined by a first side face of the other of first and second conductor ends substantially parallel with a second plane defined by a second side face of one of the second upper portion.

15. An electric machine winding assembly comprising:
a stator defining a central axis and one or more circumferential axes about the central axis; and
a plurality of pairs of windings each extending from the stator, each coil of the plurality of pairs of windings including first and second members, each of the first and second members including a lower portion, a mid-portion, and an upper portion having a conductor end secured thereto,
wherein one of the upper portions includes a first bend defining a twist shape to orient a respective conductor end along one of the one or more circumferential axes.

16. The assembly of claim 15 , wherein the plurality of pairs of windings includes at least two pairs of coils radially spaced from one another to define an insulation gap therebetween and sized to receive an insulation layer.

17. The assembly of claim 15 , wherein the plurality of pairs of windings further include at least two pairs of coils circumferentially spaced from one another to define a clamp gap therebetween and sized to receive a portion of a clamp tool to compress pairs of conductor ends of each of the at least two pairs of coils toward one another.

18. The assembly of claim 15 , wherein each of the conductor ends includes a pair of opposing minor sides and a pair of opposing major sides, and wherein each of the pair of opposing major sides are aligned with one another along an axis that is not oriented radially relative to the central axis.

19. The assembly of claim 15 , wherein one of the upper portions of each of the first and second member includes a second bend defining an upward bend to orient a first plane defined by a first side face of one of the conductor ends substantially parallel with a second plane defined by a second side face of one of a respective upper portion.

20. The assembly of claim 15 , wherein each of the first and second members includes a third bend between a respective lower portion and a respective mid-portion to orient each of the mid-portions substantially parallel with the central axis of the stator.

Assignees

• Ford Global Tech Llc

Inventors

• Tang Chun
• Qiu Huifen

Classifications

• H02K15/33

  Connecting winding sections; Forming leads; Connecting leads to terminals · CPC title

• H02K15/36

  Processes or apparatus for simultaneously twisting two or more open ends of hairpins after their insertion into the machine (for simultaneously twisting two or more hairpins prior to mounting into the machine H02K15/0428) · CPC title

• H02K3/34

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

• H02K3/14

  with transposed conductors, e.g. twisted conductors · CPC title

• H02K3/524 Primary

  for U-shaped, E-shaped or similarly shaped cores · CPC title