Electric machine with stator segments and winding supports

Patent metadata

Field	Value
Publication number	US-11437872-B2
Application number	US-201816648300-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Sep 20, 2017
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

An electric machine includes an annular stator and a rotor disposed within the stator. The stator has a plurality of stator segments in the circumferential direction and a stator winding applied to a winding support. Each stator segment has lateral cutouts in the circumferential direction. In each case a winding support having a toroidally applied stator winding is introduced into lateral cutouts, which are adjacent in the circumferential direction, of adjacent stator segments. The radial outer side of the stator winding is partially surrounded by stator segment outer arms of mutually adjacent stator segments in such a way that a radially directed outer gap is formed between the stator segment outer arms of the two mutually adjacent stator segments.

First claim

The invention claimed is:

1. An electric machine, comprising:
an annular stator and a rotor disposed within said stator;
said stator having a plurality of stator segments disposed in a circumferential direction, each stator segment including a winding support and a stator winding toroidally applied to said winding support;
each of said stator segments having lateral cutouts disposed in the circumferential direction and stator segment outer arms;
each of said winding supports with said applied stator winding being introduced into circumferentially adjacent said lateral cutouts of adjacent stator segments;
said stator winding having a radial outer side being partially surrounded by said stator segment outer arms of mutually adjacent stator segments forming a radially directed outer gap between said stator segment outer arms of each two respective mutually adjacent stator segments; and
said outer gap having a length and a width selected to form an additional magnetic circuit of predefined inductance in a region outside said stator, said predefined inductance determined by the length and the width of said outer gap, said additional magnetic circuit producing a magnetic field of a desired size outside the stator that has no influence on the rotor.

2. The electric machine according to claim 1 , wherein said stator segment outer arms have identical lengths in the circumferential direction of said stator.

3. The electric machine according to claim 1 , wherein each of said winding supports is injection-molded onto a respective stator segment.

4. The electric machine according to claim 1 , wherein said stator winding is not symmetrical on its inner side and its outer side.

5. The electric machine according to claim 4 , wherein said stator winding is wound narrow and high on its inner side and wide and flat on its outer side.

6. The electric machine according to claim 1 , wherein said winding support and said stator segment are different components, and each of said winding supports with said applied stator winding is pushed onto a respective stator segment.

7. The electric machine according to claim 6 , wherein each of said stator segments has a fastener oriented in a direction of an adjacent stator segment.

8. The electric machine according to claim 7 , wherein said fastener of each of said stator segments includes a latching projection in the direction of said adjacent stator segment.

9. The electric machine according to claim 8 , wherein said fastener of each of said stator segments includes a latching recess facing away from said winding support on an outer side of said stator segment.

10. The electric machine according to claim 8 , wherein said latching projection passes through said winding support.

Assignees

• Vitesco Tech Gmbh

Inventors

• Stauder Peter
• Lueddecke Bernhardt
• Vornweg Lars
• Schein Uwe
• Just Dominik

Classifications

• H02K1/148 Primary

  Sectional cores (H02K1/141 takes precedence) · CPC title

• F02B39/10

  electric · CPC title