Method of forming a component for an electric machine

Patent metadata

Field	Value
Publication number	US-11394282-B2
Application number	US-201916536992-A
Country	US
Kind code	B2
Filing date	Aug 9, 2019
Priority date	Aug 10, 2018
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

A method of forming a winding for an electric machine includes forming a plurality of conductors having a substantially identical wire form with a plurality of end turns joining a plurality of slot segments, defining a first portion of the plurality of conductors as first conductors, rotating a second portion of the plurality of conductors about a central axis to mirror the first conductors, defining the second portion of the plurality of conductors as second conductors, combining select ones of the first conductors and select ones of the second conductors to form conductor pairs, and combining a plurality of conductor pairs to form a multi-conductor winding.

First claim

What is claimed is:

1. A method of forming a winding for an electric machine comprising:
forming a plurality of conductors having a substantially identical wire form with a plurality of end turns joining a plurality of slot segments;
defining a first portion of the plurality of conductors as first conductors;
rotating a second portion of the plurality of conductors about a central axis to mirror the first conductors;
defining the second portion of the plurality of conductors as second conductors;
combining select ones of the first conductors and select ones of the second conductors to form conductor pairs; and
combining a plurality of conductor pairs to form a multi-conductor winding.

2. The method of claim 1 , wherein combining select ones of the first conductors and select ones of the second conductors includes nesting one of the end turns of one of the second conductors within one of the end turns of one of the first conductors.

3. The method of claim 2 , wherein combining select ones of the first conductors and select ones of the second conductors includes nesting an end turn of one of the first conductors between slot segments of one of the second conductors.

4. The method of claim 1 , wherein combining the plurality of conductor pairs includes combining a first conductor pair, a second conductor pair, and a third conductor pair to form a six-conductor winding.

5. The method of claim 1 , further comprising: combining a first multi-conductor winding and a second multi-conductor winding to form at least a portion of a stator winding for the electric machine.

6. The method of claim 1 , wherein forming the plurality of conductors includes forming a plurality of conductors having a plurality of end turns having at least three distinct winding pitches.

7. The method of claim 6 , wherein forming the a plurality of conductors having the plurality of end turns having at least three distinct winding pitches includes forming a first portion of the plurality of end turns to include a first winding pitch, at least one of the plurality of end turns to include a second winding pitch that is distinct from the first winding pitch, and at least one other of the plurality of end turns to include a third winding pitch that is distinct from the first and second winding pitches.

8. The method of claim 7 , wherein forming the at least one of the plurality of end turns to include the second winding pitch includes forming the at least one of the plurality of end turns to include a winding pitch that is one greater than the first winding pitch.

9. The method of claim 8 , wherein forming the at least one other of the plurality of end turns to include the third winding pitch includes forming the at least one other of the plurality of end turns to include a winding pitch that is one less than the first winding pitch.

10. The method of claim 8 , wherein forming the plurality of conductors includes forming the end turns having a triangular shape.

11. The method of claim 10 , wherein forming one of the second conductors further includes forming a second conductor having at least 12 end turns disposed on one side of the central axis and at least 12 end turns disposed on an opposite side of the central axis.

12. The method of claim 7 , wherein forming one of the second conductors further includes locating the central axis of the one of the second conductors an equal distance from the end turn having the second winding pitch and the end turn having the third winding pitch.

13. The method of claim 12 , wherein forming one of the second conductors with a first connector lead and a second connector lead and locating the central axis of the one of the second conductors an equal distance from the first connector lead and the second connector lead.

14. The method of claim 1 , wherein the central axis of the second conductors are located substantially parallel to slot segments of the second conductors.

15. The method of claim 1 , further comprising: positioning the multi-conductor winding in a stator body of an electric machine.

16. An electric machine comprising:
a stator including a stator body and a plurality of windings formed from the method of claim 1 .

Assignees

• Borgwarner Inc

Inventors

• Neet Kirk

Classifications

• H02K15/35

  Form-wound windings · CPC title

• H02K15/0433

  of the wave winding type · CPC title

• Y10T29/53143

  Motor or generator · CPC title

• H02K15/085

  by laying conductors into slotted stators · CPC title

• H02K3/50

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