Winding, rotor and electric motor

Patent metadata

Field	Value
Publication number	US-11855502-B2
Application number	US-202017432190-A
Country	US
Kind code	B2
Filing date	Mar 3, 2020
Priority date	Apr 10, 2019
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A winding of at least one conductor element is provided. At least some sections of the winding are enclosed in a casting compound, and the conductor element including an internal conductive material as well as a first sheath layer and a second sheath layer for insulation purposes, the second sheath layer being made of a material that differs from a material of the first sheath layer, and the conductor element further including at least one third sheath layer, wherein the ductility of the third sheath layer is greater than the ductility of the casting compound.

First claim

What is claimed is:

1. A winding of at least one conductor element,
wherein the winding is surrounded at least in certain regions by an encapsulation composition,
wherein the conductor element comprises an internal conductor material,
wherein the conductor element further comprises a first enveloping layer and a second enveloping layer for insulation purposes,
wherein the second enveloping layer is formed from a material different from a material of the first enveloping layer,
wherein the conductor element further comprises at least a third enveloping layer, and
wherein a ductility of the third enveloping layer is higher than a ductility of the encapsulation composition.

2. The winding according to claim 1 ,
wherein the third enveloping layer has at least one of a higher ductility or a higher fracture toughness than at least one of the first enveloping layer or the second enveloping layer.

3. The winding according to claim 1 ,
wherein the third enveloping layer is an outermost enveloping layer.

4. The winding according to claim 1 ,
wherein static friction acts between the first enveloping layer and the conductor element as contact partners, the static friction being greater than a static friction of the third enveloping layer with respect to at least one adjoining contact partner.

5. The winding according to claim 1 ,
wherein each of the enveloping layers comprises a multiplicity of layers, and
wherein the first enveloping layer comprises more layers than the third enveloping layer.

6. The winding according to claim 1 ,
wherein a material of the third enveloping layer is different than a material of the second enveloping layer.

7. The winding according to claim 1 ,
wherein a material of the third enveloping layer and a material of the first enveloping layer are a polyester (PES), and
wherein a material of the second enveloping layer is polyamide-imide (PAI).

8. The winding according to claim 1 ,
wherein a degree of crosslinking of a material of the third enveloping layer is lower than a degree of crosslinking of the material of the first enveloping layer.

9. The winding according to claim 1 ,
wherein a temperature resistance of the second enveloping layer is higher than a temperature resistance of the first enveloping layer and the third enveloping layer.

10. A rotor comprising the winding according to claim 1 .

11. An electric motor comprising the rotor according to claim 10 .

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Becker Thomas
• Jahnke Andreas

Classifications

• H02K3/32 Primary

  Windings characterised by the shape, form or construction of the insulation · CPC title

• H02K3/30 Primary

  Windings characterised by the insulating material · CPC title