Stator assemblies for three phase dynamoelectric machines and related winding methods

Patent metadata

Field	Value
Publication number	US-10103596-B2
Application number	US-201514727526-A
Country	US
Kind code	B2
Filing date	Jun 1, 2015
Priority date	Jun 1, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

According to some aspects of the present disclosure, example stator assemblies for three phase dynamoelectric machines and related winding methods are disclosed. An example stator assembly generally includes a non-segmented stator core including a stator yoke and a plurality of teeth. The stator assembly also includes a plurality of coil portions electrically coupled in a delta winding pattern, and including a first coil portion extending around a first one of the plurality of teeth and a second coil portion extending around a second one of the plurality of teeth. The stator assembly further includes a plurality of connection portions including a first connection portion extending between the first coil portion and the second coil portion and electrically coupling the first coil portion and the second coil portion. The first coil portion, the second coil portion and the first connection portion are defined by a continuous length of winding wire.

First claim

What is claimed is:

1. A stator assembly for a three phase dynamoelectric machine, the assembly comprising:
a non-segmented stator core including a stator yoke and a plurality of teeth extending from the stator yoke toward a central opening, the central opening extending from a first end of the stator core to a second end of the stator core opposite the first end, the plurality of teeth spaced apart from one another and defining a plurality of slots between the plurality of teeth for receiving windings of the stator assembly;
a plurality of coil portions electrically coupled in a delta winding pattern, the plurality of coil portions including a first coil portion extending around a first one of the plurality of teeth and through slots on each side of the first one of the plurality of teeth, and a second coil portion extending around a second one of the plurality of teeth and through slots on each side of the second one of the plurality of teeth;
a plurality of connection portions including a first connection portion extending between the first coil portion and the second coil portion and electrically coupling the first coil portion and the second coil portion, the first coil portion, the second coil portion and the first connection portion defined by a continuous length of winding wire; and
an end cap positioned on the first end of the stator core, the end cap including a plurality of guides defining multiple routing paths for routing the plurality of connection portions, different ones of the multiple routing paths receiving connection portions corresponding to different phases of the delta winding pattern.

2. The stator assembly of claim 1 , wherein the plurality of coil portions include a first set of coil portions corresponding to a first phase of the three phase dynamoelectric machine, a second set of coil portions corresponding to a second phase of the three phase dynamoelectric machine and a third set of coil portions corresponding to a third phase of the three phase dynamoelectric machine for coupling to a first phase, a second phase, and a third phase, respectively, of a three phase electric power source.

3. The stator assembly of claim 2 , wherein the stator assembly includes a total of nine teeth and a total of nine coil portions, each of the coil portions extending about a different one of the nine teeth and through slots on each side of said different one of the nine teeth.

4. The stator assembly of claim 3 , wherein adjacent coil portions belong to different ones of the sets of coil portions such that each coil portion is adjacent other coil portions corresponding to different phases than said coil portion.

5. The stator assembly of claim 1 , wherein each of the plurality of connection portions extends between two of the plurality of coil portions and electrically couples said two of the plurality of coil portions.

6. The stator assembly of claim 5 , wherein each of the plurality of connection portions includes a lead portion, and each lead portion is positioned in one of a first, second or third lead bundle for coupling to a first phase, a second phase, or a third phase, respectively, of a three phase electric power source.

7. The stator assembly of claim 6 , wherein all of the lead portions are routed through no more than six of the plurality of slots.

8. The stator assembly of claim 7 , wherein all of the lead portions are routed through no more than four of the plurality of slots.

9. The stator assembly of claim 8 , wherein all of the lead portions are routed through no more than three of the plurality of slots.

10. The stator assembly of claim 6 , wherein the plurality of guides are positioned to separate connection portions corresponding to different phases to prevent shorting between the connection portions corresponding to the different phases.

11. The stator assembly of claim 10 , wherein the plurality of guides define at least three routing paths for routing the connection portions.

12. The stator assembly of claim 11 , wherein the plurality of guides define no more than four routing paths for routing the connection portions.

13. The stator assembly of claim 12 , wherein the plurality of guides define exactly three routing paths for routing the connection portions.

14. The stator assembly of claim 10 , wherein the end cap is a first end cap, the stator assembly further comprising:
a second end cap positioned on the second end of the stator core and configured to route at least some of the lead portions.

15. The stator assembly of claim 14 , wherein the second end cap has a substantially identical structure and configuration as the first end cap.

16. The stator assembly of claim 1 , wherein all of the plurality of coil portions and all of the plurality of connection portions are defined by no more than four continuous lengths of winding wire.

17. The stator assembly of claim 16 , wherein all of the plurality of coil portions and all of the plurality of connection portions are defined by no more than one continuous length of winding wire.

18. The stator assembly of claim 1 , wherein the continuous length(s) of winding wire have a wire gauge in the range of 18 to 19 AWG.

19. A compressor including the stator assembly of claim 1 .

Assignees

• Emerson Electric Co

Inventors

• Wang Weirong
• Yin Yongyue

Classifications

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K1/146 Primary

  consisting of a generally annular yoke with salient poles · CPC title

• H02K3/02

  Windings characterised by the conductor material · CPC title

• H02K3/521

  applicable to stators only · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title