STATOR FOR AN ELECTRICAL MACHINE, ELECTRICAL MACHINE, AND VEHICLE

Abstract

Stator for an electrical machine, comprising a stator core with stator slots which are formed along an axial direction with respect to a center axis of the stator and are arranged in a manner distributed in a circumferential direction with respect to the center axis, a hairpin winding with a large number of hairpin element arrangements which are arranged in the stator slots and each emerge from the end side of the stator core, and at least one insulation apparatus with a body in which a large number of passage openings which are arranged in a manner distributed in the circumferential direction are formed; wherein a respective hairpin element arrangement passes through one of the passage openings and the insulation apparatus specifies a distance of the hairpin element arrangement from an edge of the stator slot which receives the hairpin element arrangement.

Claims

1. A stator for an electrical machine, comprising: a stator core with stator slots which are formed along an axial direction with respect to a center axis of the stator and are arranged in a manner distributed in a circumferential direction with respect to the center axis; a hairpin winding with a multiplicity of hairpin element arrangements which are arranged in the stator slots and each emerge from the end face of the stator core; and at least one insulating device with a body in which a multiplicity of passage openings arranged in a manner distributed in the circumferential direction are formed, wherein a respective hairpin element arrangement passes through one of the passage openings and the insulating device predefines a distance of the hairpin element arrangement from an edge of the stator slot receiving the hairpin element arrangement.

2. The stator as claimed in claim 1, wherein an edge of a respective passage opening has protrusions which point into the passage opening and predefine the distance.

3. The stator as claimed in claim 2, wherein each hairpin element arrangement has a plurality of hairpin elements which are arranged in the stator slot in a manner laminated in a lamination direction with respect to the center axis.

4. The stator as claimed in claim 3, wherein for a respective hairpin element of the hairpin element arrangement one of the protrusions is formed on an or on a respective edge portion of the passage opening, the edge portion extending along or parallel to the lamination direction.

5. The stator as claimed in claim 3, wherein for a or a respective hairpin element of the hairpin element arrangement that is an outer hairpin element with respect to the lamination direction one of the protrusions is formed on an edge portion of the passage opening, the edge portion extending transversely with respect to the lamination direction.

6. The stator as claimed in claim 1, wherein a casting compound surrounding the hairpin element arrangements is arranged in the stator slots.

7. The stator as claimed in claim 1, wherein an insulating device is arranged on an end face of the stator core.

8. The stator as claimed in claim 7, wherein an insulating device is arranged on the other end face of the stator core opposite the first end face.

9. The stator as claimed in claim 1, wherein the stator core is subdivided along the axial direction into at least two partial stator cores, an insulating device being arranged between a respective pair of adjacent partial stator cores.

10. An electrical machine, comprising: a stator as claimed in claim 1; and a rotor which is arranged rotatably within the stator.

11. A vehicle, comprising: an electrical machine as claimed in claim 10, which is configured to drive the vehicle.

Description

[0024] Further advantages and details of the present invention emerge from the exemplary embodiments described below and with reference to the drawings. The latter are schematic illustrations and:

[0025] FIG. 1 shows a perspective view of an end face of a first exemplary embodiment of the stator according to the invention;

[0026] FIG. 2 shows a sectioned detailed view of the stator according to the first exemplary embodiment;

[0027] FIG. 3 shows a perspective detailed view of the stator according to the first exemplary embodiment;

[0028] FIG. 4 shows a schematic diagram of a second exemplary embodiment of the stator according to the invention;

[0029] FIG. 5 shows a schematic diagram of a third exemplary embodiment of the stator according to the invention; and

[0030] FIG. 6 shows a schematic diagram of an exemplary embodiment of the vehicle according to the invention with an exemplary embodiment of the electrical machine according to the invention.

[0031] FIG. 1 is a perspective view of an end face of a first exemplary embodiment of a stator 1.

[0032] The stator 1 comprises a stator core 2 with stator slots 3, which are concealed in FIG. 1 (see FIG. 2 and FIG. 3) and which are formed along an axial direction with respect to a center axis 4 of the stator. The stator slots 3 are arranged in the stator core 2 in a manner distributed in a circumferential direction with respect to the center axis 4.

[0033] In addition, the stator 1 comprises a hairpin winding 5 with a multiplicity of hairpin element arrangements 6 which are arranged in the stator slots 3 in a manner distributed in the circumferential direction and each emerge from the end face of the stator core 2. The hairpin winding 5 thus forms winding heads 7 on both end faces of the stator core 2.

[0034] An insulating device 8 is provided in the stator 1 according to the first exemplary embodiment. Said insulating device has an annular body 9 in which a multiplicity of passage openings 10 arranged in a manner distributed in the circumferential direction are formed. A respective hairpin element arrangement 6 passes through one of the passage openings 10.

[0035] FIG. 2 shows a sectioned detailed view of the stator 1 according to the first exemplary embodiment.

[0036] The insulating device 8 (see FIG. 1) predefines a distance of the hairpin element arrangement 6 from an edge 11 of the stator slot 3 receiving it.

[0037] FIG. 3 is a perspective detailed view of the stator 1 according to the first exemplary embodiment. Only one hairpin element arrangement 6, shown centrally in FIG. 3, is fully illustrated, whereas other stator slots 3 are illustrated unoccupied or only partially occupied, in order to be able to more accurately describe the insulating device 8.

[0038] Each hairpin element arrangement 6 comprises a plurality of hairpin elements 12a, 12b, four by way of example here, which are arranged in the stator slot 3 in a manner laminated in a lamination direction, symbolized by an arrow 13, with respect to the center axis 4 (see FIG. 1). Each passage opening 10 of the insulating device 8 comprises two edge portions 14a, 14b which extend along the lamination direction, and two edge portions 15a, 15b which extend transversely with respect to the lamination direction. For a respective hairpin element 12a, 12b of the hairpin element arrangement 6, a protrusion 16 is formed on each of the opposite edge portions 14a, 14b. In addition, for each outer hairpin element 12a with respect to the lamination direction, a protrusion 17 is provided on each of the edge portions 15a, 15b extending transversely with respect to the lamination direction.

[0039] Although not illustrated in FIG. 2 and FIG. 3 for clarity reasons, the stator slots 3 are filled with a casting compound surrounding the hairpin element arrangements 6. The casting compound is a cured resin.

[0040] In the following, further exemplary embodiments of a stator 1 are described, for which all of the statements regarding the first exemplary embodiment correspondingly apply except for the differences described below. Identical components or components acting in an identical manner are provided with identical reference signs.

[0041] FIG. 4 is a schematic diagram of a second exemplary embodiment of a stator 1. In this exemplary embodiment, two identical insulating devices 8 are arranged on both opposite end faces of the stator core 2.

[0042] FIG. 5 is a schematic diagram of a third exemplary embodiment of a stator 1. In this exemplary embodiment, the stator core 2 is subdivided into two partial stator cores 18. In addition to two insulating devices 8, which are arranged on the end faces, in accordance with the second exemplary embodiment, a further insulating device 8 is arranged between the adjacent partial stator cores 18, said insulating device being formed in a manner substantially corresponding to the two other insulating devices 8. Of course, the stator core 2 can also be subdivided into more than two partial stator cores 18, an insulating device 8 being provided between a respective adjacent pair of partial stator cores 18.

[0043] FIG. 6 is a schematic diagram of an exemplary embodiment of a vehicle 19 with an exemplary embodiment of an electrical machine 20. The electrical machine 20 is configured for driving the vehicle 19 and comprises a stator 1 according to one of the previously described exemplary embodiments, in which a rotor 21 is arranged rotatably. The vehicle is an electric vehicle (BEV) or a hybrid vehicle. As can be seen, the center axis 4 corresponds to the axis of rotation of the rotor 21.