Method for manufacturing stator of rotating electric machine, stator of rotating electric machine, and rotating electric machine
US-2023109194-A1 · Apr 6, 2023 · US
Method of varnish trickling to improve emachine durability
US12537427B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12537427-B2 |
| Application number | US-202318295696-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 4, 2023 |
| Priority date | Apr 4, 2023 |
| Publication date | Jan 27, 2026 |
| Grant date | Jan 27, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method to apply varnish to a stator of an e-motor includes injecting varnish at an outer diameter of a plurality of wire slots of the stator with flexible nozzle that is disposed between adjacent wire slots. The method further includes injecting varnish at an inner diameter of the wire slots.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method to apply varnish to a stator of an electric motor, the method comprising: injecting varnish at an outer diameter of a plurality of wire slots of the stator with a flexible nozzle disposed between adjacent wire slots; and injecting varnish at an inner diameter of the wire slots, wherein a nozzle tip of the flexible nozzle is inserted into a gap between the adjacent wire slots under a static condition. 2 . The method of claim 1 , wherein the injection of the varnish at the outer diameter defines a vertical axis with a center of the stator and the injection at the inner diameter occurs at an angle greater than 0° relative to the vertical axis. 3 . The method of claim 1 , wherein the nozzle tip of the flexible nozzle is inserted into a gap between the adjacent wire slots a distance equal to about ⅔ of a slot pitch at a top of the adjacent wire slots. 4 . The method of claim 1 , wherein the flexible nozzle applies varnish to a first side of a slot and then a second side of the slot as the stator rotates. 5 . The method of claim 1 , wherein the injection of the varnish at the inner diameter is supplied with a straight nozzle. 6 . The method of claim 5 , wherein the straight nozzle applies varnish to a first side of a slot and then a second of the slot as the stator rotates. 7 . The method of claim 1 , wherein both sides of a wire slot are fully covered after one rotation of the stator. 8 . A method to apply varnish to a stator of an electric motor, the method comprising: injecting varnish at an outer diameter of a plurality of wire slots of the stator with a flexible nozzle disposed between adjacent wire slots, the injection of the varnish at the outer diameter defining a vertical axis with a center of the stator; and injecting varnish at an inner diameter of the wire slots, the injection at the inner diameter of the wire slots occurring at an angle of about 30° relative to the vertical axis, wherein a nozzle tip of the flexible nozzle is inserted into a gap between the adjacent wire slots under a static condition. 9 . The method of claim 8 , wherein the nozzle tip of the flexible nozzle is inserted into a gap between the adjacent wire slots a distance equal to about ⅔ of a slot pitch at a top of the adjacent wire slots. 10 . The method of claim 8 , wherein the injection of the varnish at the inner diameter is supplied with a straight nozzle. 11 . The method of claim 8 , wherein both sides of a wire slot are fully covered after one rotation of the stator.
Assignees
Inventors
Classifications
the liquid or other fluent material being projected · CPC title
- B05C5/027Primary
Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated (B05C5/0254 takes precedence) · CPC title
- H02K15/12Primary
Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title
the outlet being fixed during operation · CPC title
performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface · CPC title
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Frequently asked questions
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- What does patent US12537427B2 cover?
- A method to apply varnish to a stator of an e-motor includes injecting varnish at an outer diameter of a plurality of wire slots of the stator with flexible nozzle that is disposed between adjacent wire slots. The method further includes injecting varnish at an inner diameter of the wire slots.
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification B05C5/027. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).