Stator for an Electric Machine

Patent metadata

Field	Value
Publication number	US-2021184530-A1
Application number	US-201917269657-A
Country	US
Kind code	A1
Filing date	Jul 23, 2019
Priority date	Aug 21, 2018
Publication date	Jun 17, 2021
Grant date	—

Abstract

A stator for an electric machine, including a shaped rod winding, wherein the shaped rod winding is formed by a plurality of shaped rods which have connecting points in the region of a winding head, wherein the connection points are surrounded by a casting layer, and wherein a thickness of the casting layer is predetermined by an enveloping element which is arranged on the winding head close to the contour.

First claim

1 .- 9 . (canceled)

10 . A stator for an electric machine, comprising:
a shaped bar winding, wherein the shaped bar winding is formed by a multiplicity of shaped bars which have connection points in the region of an end winding, wherein the connection points are enveloped by a casting layer, and wherein a thickness of the casting layer is predetermined by an enveloping element, which is arranged on the end winding close to the contour.

11 . The stator according to claim 10 , wherein the enveloping element is connected to the end winding via the casting layer.

12 . The stator according to claim 10 , wherein the enveloping element has or forms pockets and/or undercuts.

13 . The stator according to claim 10 , wherein the enveloping element is flexible, at least in regions.

14 . The stator according to claim 10 , wherein the enveloping element is fastened in a force-fitting manner to the end winding.

15 . An enveloping element for the stator according to claim 10 .

16 . A method for producing a coil, comprising:
providing a coil, which has at least one end winding; and using an enveloping element for shaping a casting layer on the at least one end winding.

17 . The method according to claim 16 , further comprising:
introducing a casting compound into the enveloping element prior to attaching the enveloping element to the at least one end winding; and dipping the at least one end winding into the enveloping element.

18 . The method according to claim 16 , further comprising:
arranging the enveloping element on the at least one end winding; and introducing casting compound between the enveloping element and the at least one end winding.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Burmeister Uwe
• Rienecker Thorsten
• Schlag Philipp
• Winkle Daniel

Classifications

• H02K3/50

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

• H02K15/105

  to the windings · CPC title

• H02K15/12 Primary

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• H02K3/505

  for large machine windings, e.g. bar windings (H02K3/51 takes precedence) · CPC title

• H02K3/38 Primary

  around winding heads, equalising connectors, or connections thereto · CPC title