Laminate with varnish accumulation feature

Patent metadata

Field	Value
Publication number	US-12266972-B2
Application number	US-202217946184-A
Country	US
Kind code	B2
Filing date	Sep 16, 2022
Priority date	Sep 16, 2022
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A method for applying varnish to a stator of an electric motor includes depositing varnish onto an outer laminate of the stator, accumulating the deposited varnish with a ridge on the outer laminate, and directing the accumulated varnish into a slot of the outer laminate with the ridge.

First claim

What is claimed is:

1. A stator of an electric motor, the stator comprising:
an outer laminate including a ridge and defining a first slot; and
an inner laminate including a second slot aligned with the first slot of the outer laminate,
wherein the ridge is configured to direct varnish applied by a varnish injector into the first slot and the second slot.

2. The stator of claim 1 , wherein the ridge includes a sloped side angled toward the first slot to have the varnish flow down the sloped side to the first slot.

3. The stator of claim 1 , wherein the outer laminate further includes a second ridge radially outward of the ridge.

4. The stator of claim 3 , wherein the outer laminate further includes a third ridge radially outward of the second ridge, the second and third ridges configured to accumulate varnish that flows past the ridge.

5. The stator of claim 1 , wherein the inner laminate includes a ridge configured to mate with the ridge of the outer laminate.

6. The stator of claim 1 , wherein the inner laminate defines a gap with the ridge of the outer laminate.

7. The stator of claim 1 , wherein the ridge is stamped into the outer laminate.

8. The stator of claim 1 , further comprising a fastener attaching the outer laminate to the inner laminate, wherein the ridge is disposed radially between the first slot and the fastener.

9. The stator of claim 1 , wherein the ridge defines a rounded edge facing the first slot.

10. The stator of claim 1 , wherein the stator is configured to rotate about a central axis, and the varnish injector is arranged to apply varnish onto the outer laminate via gravity.

11. The stator of claim 10 , wherein the stator is configured to rotate to a specified angular position at which the applied varnish flows into the first slot via gravity.

12. The stator of claim 1 , wherein the ridge is formed separately from the outer laminate.

13. The stator of claim 1 , wherein the ridge extends only partially around a circumference of the outer laminate.

14. A method for applying varnish to a stator of an electric motor, the method comprising:
depositing varnish onto an outer laminate of the stator;
accumulating the deposited varnish with a ridge on the outer laminate; and
directing the accumulated varnish into a slot of the outer laminate with the ridge.

15. The method of claim 14 , wherein the ridge includes a sloped side directed toward the slot, and the method further comprises directing the accumulated varnish along the sloped side into the slot.

16. The method of claim 14 , further comprising rotating the stator to a first angular position to receive varnish from a varnish injector via gravity and rotating the stator to a second angular position to direct the received varnish into the slot via gravity.

17. The method of claim 14 , wherein the outer laminate includes a second ridge radially outward of the ridge, and the method further comprises accumulating the deposited varnish flowing past the ridge with the second ridge.

18. The method of claim 14 , further comprising rotating the stator to align a varnish injector with a second slot on the outer laminate.

19. The method of claim 14 , further comprising directing the varnish onto a wire disposed in the slot.

20. The method of claim 14 , further comprising directing the varnish into a second slot of an inner laminate disposed adjacent to the outer laminate, the second slot of the inner laminate aligned with the slot of the outer laminate.

Assignees

• Ford Global Tech Llc

Inventors

• Changarankumarath Pradeepkumar Akash
• Rathnam Singar

Classifications

• H02K15/10

  Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K3/30

  Windings characterised by the insulating material · CPC title

• H02K15/105

  to the windings · CPC title

• H02K15/021

  Magnetic cores · CPC title