US-20260128646-A1 - STATOR FOR AN ELECTRIC MACHINE, ELECTRIC MACHINE, AND MACHINE-GEARBOX ARRANGEMENT

Abstract

The present invention relates to a stator for an electric machine. The stator includes an annular stator body and a plurality of stator windings arranged on the stator body. The stator body includes a circular segment, which extends along a circular path, and a recess segment, which has a radially inwardly deviating course from the circular path. The stator windings are arranged on the circular segment. The present invention further relates to an electric machine including: a stator, and a rotor arranged to be rotatable about a rotor axis of rotation within the stator body. The present invention further relates to a machine-gearbox arrangement including: an electric machine, a first gear wheel, a second gear wheel, and an element which is non-rotatably connected to the second gear wheel, wherein the element is arranged at least partially in a region between a recess segment and the circular path.

Inventors

• Bodo BUECKER
• TOBIAS ENGEL
• Matthias Humpe
• Tobias Lass
• Guido Schniederjohann
• Christoph Schulte
• Thomas Valeiras Fernandez
• Katrin Zimmermann

Assignees

• HELLA GmbH & Co. KGaA

Dates

Publication Date

20260507

Application Date

20251105

Priority Date

20241106

Claims (13)

1. 1 . A stator for an electric machine, comprising: an annular stator body; a plurality of stator windings arranged on the stator body; wherein the stator body comprises: at least one circular segment which extends along a circular path, and at least one recess segment which has a radially inward deviating course from the circular path, wherein the plurality of stator windings are arranged on the at least one circular segment.
2. 2 . The stator of claim 1 , wherein the stator body is rotationally symmetrical with respect to a center point of the circular path.
3. 3 . The stator of claim 1 , wherein: the at least one circular segment comprises two opposing circular segments; and the at least one recess segment comprises two opposing recess segments.
4. 4 . The stator of claim 1 , wherein the stator body is formed as a laminated core.
5. 5 . The stator of claim 1 , wherein at least one radially inward projecting magnetic field guiding element is formed on the at least one recess segment.
6. 6 . The stator of claim 1 , wherein stator teeth supporting supporting the stator winding are formed integrally with the stator body.
7. 7 . The stator of claim 1 , wherein the plurality of stator windings are arranged in a plurality of stator winding groups, and wherein adjacent ones of the plurality of stator windings within a respective one of the plurality of stator winding groups have an angular distance from one another which is smaller than an angular distances between adjacent ones of the stator winding groups.
8. 8 . The stator of claim 7 , wherein adjacent ones of the plurality of stator windings within a respective one of the plurality of stator winding groups are separated from each other by an angular distance in the range of 32.5° to 40° from one another.
9. 9 . The stator of claim 1 , further comprising a plastic body that is overmolded onto the stator body.
10. 10 . The stator of claim 9 , further comprising a plurality of contact elements for electrically contacting the stator windings, wherein the plurality of contact elements are arranged in the angular region of a recess segment.
11. 11 . The stator of claim 10 , wherein the contact elements are attached to the plastic body.
12. 12 . An electric machine comprising: the stator according to claim 1 ; and a rotor, the rotor being arranged within the stator body so as to be rotatable about a rotor axis of rotation.
13. 13 . A machine-gearbox arrangement comprising: the electric machine according to claim 12 ; a first gear wheel, which is arranged to rotate with the rotor; a second gear wheel, which is arranged in engagement with the first gear wheel; and an element which is connected to the second gear wheel in a rotationally fixed manner, wherein the element is arranged at least partially in an area between the at least one recess segment and the circular path.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application claims the benefit of German Patent Application DE 10-2024-132-280.2, filed Nov. 6, 2024, the disclosure of which is incorporated by reference. BACKGROUND OF THE INVENTION The present invention relates to a stator for an electric machine, comprising an annular stator body and a plurality of stator windings arranged on the stator body. The present invention further relates to an electric machine comprising: such a stator and a rotor arranged rotatably about a rotor axis of rotation within the stator body. The present invention further relates to a machine-gearbox arrangement comprising: such an electric machine, a first gear wheel which is arranged to rotate with the rotor, a second gear wheel which is arranged in engagement with the first gear wheel, and an element, for example, a gear shaft or a third gear wheel, which is non-rotatably connected to the second gear wheel. Such a machine-gearbox arrangement is known from DE 10 2023 101 992 A1. SUMMARY OF THE INVENTION The object of the present invention is to enable a relatively free and space-saving design of a gear stage formed by the first gear wheel and the second gear wheel in a machine-gearbox arrangement of the type mentioned above. According to the invention, this object is achieved by a stator for an electric machine, an electric machine, and a machine-gearbox arrangement with the features of the embodiments disclosed herein. The stator for an electric machine according to the invention comprises an annular stator body, i.e. a stator body rotating around a center point. In principle, the stator body may have any shape as long as it forms an annular structure. Preferably, the stator body forms a self-contained, uninterrupted annular structure. However, it is also conceivable in principle that there is an interruption in the annular structure. According to the invention, the stator body in each case comprises at least one circular segment which extends along a circular path, and at least one recess segment which has a radially inwardly deviating course from the circular path. The stator body thus comprises at least one substantially circular section, at least one circular segment, and at least one section that deviates from the circular shape, specifically one that is recessed radially inward, the at least one recess segment. If the stator body comprises several circular segments, these preferably all run along the same circular path. In principle, at least one recess segment may have any radially inward deviation from the circular path of at least one circular segment, for example, a straight line or a radially inward V-shaped or U-shaped course. The stator body consists of a magnetizable, preferably ferromagnetic, material. In principle, the stator body may be designed as a monolithic solid body or as a laminated core. The stator for an electric machine according to the invention further comprises several, preferably six, stator windings designed in a fundamentally known manner for generating a magnetic field driving a rotor of the electric machine. According to the invention, the stator windings are arranged concentrically with respect to a center point of the circular path along which at least one circular segment extends, on at least one circular segment of the stator body. According to the invention, the stator windings are therefore arranged adjacent to at least one circular segment of the stator body. According to the invention, at least the center axes of all stator windings are therefore located in the angular region of at least one circular segment, wherein the angular region refers to the center point of the circular path. Preferably, the stator windings are located completely within the angular region of at least one circular segment. If the stator body comprises several circular segments, the stator windings are preferably evenly distributed over the several circular segments, i.e. an equal number of stator windings are preferably arranged adjacent to each of the circular segments. Preferably, all stator windings have the same number of turns. However, it is also conceivable that the stator windings have different numbers of turns. Due to the fact that the stator body comprises at least one recess segment, the element of a machine-gearbox arrangement of the above-mentioned type realized with the stator according to the invention, which is non-rotatably connected to the second gear wheel, can be arranged relatively close to the center point of the circular path along which at least one circular segment extends, and thus relatively close to an axis of rotation of a rotor of the machine-gearbox arrangement. This enables the use of gear wheels of a relatively small diameter for the first gear wheel and the second gear wheel of the machine-gearbox arrangement, and thus a relatively free design of a gear stage formed by the first gear wheel and the second gear wheel. Preferably, t