Stator of an electric machine

Abstract

The invention relates to a stator (1) of an electric machine (2), having a stator body (4) on which stator teeth (5) and stator slots (6) are formed and which has a stator yoke (10), wherein a single conductor (11) or a conductor bundle (12) comprising a plurality of conductors (11) is provided in each of the stator slots (6) in order to form an electric stator winding (14), at least one slot gap (16) is provided between the tooth flanks (5f) of each stator slot (6) and the conductor (11) or conductor bundle (12) provided in the stator slot (6), the slot gap forming a slot gap channel which extends in the axial direction and through which a cooling fluid can flow along a slot cooling path (17). The stator is characterized in that - the stator body (4) is equipped with at least one supply path (18) which opens into at least one of the stator slots (6) to order to supply cooling fluid to at least one slot cooling path (17), and - the stator body (4) is equipped with at least one distributor disc (20) in which at least one distributor channel (21) is formed, the distributor channel opening, as part of the supply path (18), into a plurality of stator slots (6) indirectly via a flow connection formed in the distributor disc (20), a distributor channel circumferential portion (21u) which extends in the circumferential direction being situated in the stator yoke (10).

Description

[0001] R. 414719

[0002] - 1 -

[0003] Description

[0004] title

[0005] Stator of an electric machine

[0006] State of the art

[0007] The invention relates to a stator of an electrical machine according to the preamble of the main claim.

[0008] A stator for an electric machine is already known from DE102019113785 A1, comprising a stator body extending around a stator axis, on which stator teeth and stator slots located between the stator teeth are formed, and which has a stator yoke connecting the stator teeth and, in particular, includes a stator lamination stack. The stator slots have a slot bottom facing the stator yoke. In each stator slot, a single conductor or a conductor bundle comprising several conductors, in particular a stack of flat wire conductors, is arranged to form an electrical stator winding. Between the tooth flanks of the respective stator slot and the conductor or conductor bundle arranged in the stator slot, at least one slot gap is provided, which forms a slot gap channel extending in the axial direction with respect to the stator axis and through which a cooling fluid, in particular oil, can flow along a slot cooling path.This achieves direct cooling of the conductor.

[0009] Advantages of the invention

[0010] In contrast, the stator of an electric machine according to the invention, with the characterizing features of the main claim, has the advantage that a simple and uniform distribution of the cooling medium onto the stator slots is achieved.

[0011] Furthermore, the manufacturing costs for the stator can be reduced. R. 414719

[0012] - 2 -

[0013] This is achieved according to the invention by forming at least one supply path in the stator body which opens into at least one of the stator slots for the supply of cooling fluid to at least one slot cooling path, and by arranging at least one distributor disk in the stator body in which at least one distributor channel is formed which, as part of the supply path, opens directly into several stator slots via a flow connection formed in the distributor disk and is arranged in the stator yoke with a circumferential section extending in the circumferential direction.

[0014] The portion of the supply path implemented in the distributor disk leads directly into the stator slots. Each distributor disk thus comprises not just a section of a distributor channel, but an entire distributor channel with a flow connection formed within the distributor disk leading to the stator slots.

[0015] The measures listed in the dependent claims enable advantageous further developments and improvements of the stator of an electrical machine specified in the main claim.

[0016] It is particularly advantageous if the respective distributor disk has a disk yoke located in the stator yoke, with the circumferential section of the respective distributor channel being provided in or on the disk yoke. This allows for easy flow into the groove openings of the distributor disk. Furthermore, a uniform distribution of the cooling medium across the stator grooves can be achieved. In addition, a distributor channel with low pressure loss can be formed within the disk yoke.

[0017] In an advantageous embodiment, the circumferential section of each distributor channel extends over a partial circumference of the disk yoke, in particular over an angle of 45° to 120°, especially in an annular or semi-annular shape. This allows for easy flow into the groove openings of the distributor disk. Furthermore, a uniform distribution of the cooling medium onto the stator grooves can be achieved. In addition, a distributor channel with low pressure loss can be formed within the disk yoke. R. 414719

[0018] - 3 -

[0019] It is further advantageous if the respective distributor disk has a ring-shaped arrangement of groove openings radially within the disk yoke for guiding the conductors or conductor bundles of the stator winding, and disc teeth between adjacent groove openings, wherein the distributor disk includes an inner ring facing away from the disk yoke for connecting the disc teeth. The inner ring makes the respective distributor disk mechanically more stable. This is important because the respective distributor channel can separate several disc teeth and groove edges from the disk yoke. Furthermore, the inner ring forms a groove closure in the distributor disk.

[0020] The groove openings of the respective distributor disc are advantageously each enclosed by a groove surround, which is partially or completely circumferential around the respective groove opening.

[0021] It is highly advantageous if only some of the disc teeth, which are distributed particularly around the circumference, and / or several of the groove edges, especially at the respective groove base, are attached to the disc yoke by means of a retaining rib. In this way, the distributor disc is made mechanically more stable and / or joined into a single component.

[0022] It is also advantageous if, according to a first embodiment, the respective distribution channel opens into the multiple slot openings at a slot base, or, according to a second and third embodiment, extends with at least one radial section into at least one of the disk teeth to open into the multiple slot openings. In this way, the flow into the stator slots occurs either at the slot base or at the tooth ends facing away from the stator yoke. The outflow from the stator slots can be provided at the slot base. In this way, a meandering or diagonal flow can be established in the stator slots, which can achieve a more uniform flow around the conductors arranged in the respective stator slot, thereby improving direct conductor cooling in the stator slots. R. 414719

[0023] - 4 -

[0024] According to the advantageous second embodiment, it is provided that the respective distribution channel for the opening into the several groove openings has at least one radial section per groove opening, which opens directly into a groove opening or two adjacent groove openings via a groove inlet.

[0025] According to the advantageous third embodiment, the respective radial section of each distributor channel opens successively into the multiple groove openings via a further circumferential section extending in the direction of flow. This reduces the number of radial sections per distributor disc compared to the second embodiment. This results in a mechanically more stable distributor disc.

[0026] Furthermore, it is advantageous if at least one of the slot openings or slot edges of the respective distributor disk has at least one projection on an inner side facing the conductor or conductor bundle to guide the conductor or conductor bundle when the stator winding is axially inserted into the stator slots. This prevents the conductors from colliding with sharp stamped edges of the laminations during insertion into the stator slots, thus avoiding damage to the varnish insulation of the conductors. In addition, the projections can reduce and / or limit the vibrations of the conductors in the stator slots during operation.

[0027] It is advantageous if the supply path includes a feed channel designed to supply cooling fluid to the respective distributor channel of the distributor disk, and is particularly located in or on the stator yoke, especially as a circumferential or axial channel. This allows the cooling fluid to be directed via the feed channel to the respective distributor channel of the distributor disk. The feed channel can provide additional cooling of the stator within the stator yoke.

[0028] It is further advantageous if the respective feed channel opens into a respective distribution channel via a connecting channel, wherein the connecting channel extends particularly in a radial direction and / or widens particularly in the flow direction. In this way, R. 414719

[0029] - 5 -

[0030] Flow separation in the area of ​​flow deflections in the distribution channel is minimized, thus reducing the pressure drop in the respective supply path.

[0031] It is highly advantageous if the distributor disc is, according to one variant, a plastic part or a two-component injection-molded part, or, according to another variant, a sheet metal lamella. A plastic part or a two-component injection-molded part is very cost-effective to manufacture. Furthermore, a seal for sealing the stator slots can be easily incorporated into a plastic part or a two-component injection-molded part. The two-component injection-molded part can, for example, comprise a thermoset and a thermoplastic, or a sheet metal lamella and a plastic component injection-molded onto the sheet metal lamella. In particular, a seal for sealing the stator slots can be created on the distributor disc using an injection-molded elastomer.

[0032] Furthermore, it is advantageous if at least one distributor disk is arranged in a central axial section of the stator body, resulting in two cooling paths running in opposite directions in each stator slot, exiting at the ends of the respective stator slot via a slot drain. This allows the cooling paths to be traversed at a lower pressure, thus reducing the sealing requirements for the slot gap channels. In addition, the pressure drop in each cooling path is reduced because the cooling path does not extend over the entire length of the stator slot, but only over an axial portion.

[0033] Advantageously, the stator slots are closed in the radial direction away from the stator yoke, particularly by means of a slot closure. In this way, the stator slots are sealed or quasi-sealed to allow flow of the cooling fluid.

[0034] The invention further relates to an electric machine comprising a stator according to the invention, a rotor, and an air gap formed between the stator and the rotor. R. 414719

[0035] - 6 -

[0036] drawing

[0037] Exemplary embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description.

[0038] They show:

[0039] Fig. 1 shows a stator of an electrical machine according to the invention.

[0040] Fig. 2 shows a sectional view through one of the

[0041] Stator slots of the stator according to Fig. 1 with two distributor disks according to the invention arranged in a central region of the stator body, Fig. 3 a cross-section through one of the

[0042] Stator slots along line III-III in Fig. 2,

[0043] Fig. 4 shows an inventive

[0044] Distributor disc according to a first embodiment, Fig. 5A a second embodiment of a distributor disc according to the invention, which according to a first variant is designed as a plastic part or 2K injection molded part,

[0045] Fig. 5B a partial view of the

[0046] Distributor disc according to Fig. 5A,

[0047] Fig. 6A an alternative second

[0048] Exemplary embodiment of a distributor disc according to the invention, which according to a second variant is designed as a sheet metal lamella, Fig. 6B a partial view of the

[0049] Distributor disc according to Fig. 6A,

[0050] Fig. 6C two laterally reversed

[0051] Distributor discs according to Fig. 6A and Fig. 6B and

[0052] Fig. 7 a according to the invention

[0053] Distributor disc according to a third embodiment.

[0054] Description of the exemplary implementations

[0055] Fig. 1 shows a stator of an electric machine according to the invention.

[0056] The stator 1 of an electric machine 2 has a stator body 4 extending around a stator axis 3, on which stator teeth 5 and between the R. 414719

[0057] - 7 -

[0058] Stator grooves 6 are formed lying on the stator teeth 5, and the stator yoke 10 connects the stator teeth 5 and, in particular, comprises a stator lamination stack 40 formed from sheet metal lamellae. The stator grooves 6 each have a groove base 7 facing the stator yoke 10 and a further groove base 8 facing away from the stator yoke 10. A slot 9 can be formed at the further groove base 8 between adjacent tooth ends, in particular tooth heads.

[0059] In each of the stator slots 6, a single conductor 11 or a bundle of conductors 12 comprising several conductors 11, in particular a stack of flat wire conductors, is arranged to form an electrical stator winding 14.

[0060] Fig. 2 shows a sectional view through one of the stator slots of the stator according to Fig. 1 with two distributor disks according to the invention arranged in a central area of ​​the stator body.

[0061] Between the tooth flanks 5f of the respective stator slot 6 and the conductor 11 or conductor bundle 12 arranged in the stator slot 6, at least one slot gap 16 is provided, which forms a slot gap channel extending in the axial direction with respect to the stator axis 3 and through which a cooling fluid, in particular oil, can flow along a slot cooling path 17.

[0062] According to the invention, at least one supply path 18 is formed in the stator body 4, which opens into at least one of the stator slots 6 for the supply of cooling fluid to at least one slot cooling path 17. Furthermore, according to the invention, at least one distribution disk 20 is arranged in the stator body 4 for distributing the cooling fluid to the stator slots 6.

[0063] The supply path 18 can also include a feed channel 19, which is provided for supplying cooling fluid to the respective distributor channel 21 of the respective distributor disk 20 and is particularly designed in or on the stator yoke 10 of the stator body 4, especially as a circumferential channel or axial channel. According to Fig. 2, the feed channel 19 can be an axially extending through-hole, which is provided for the passage of a fastening screw 24 for fastening the stator to a housing. For example, several are located along the R. 414719 in the stator body 4.

[0064] - 8 -

[0065] Circumferentially arranged through holes 19 are provided, with a distribution channel being formed in the respective distribution disc 20 for each through hole 19. The portion of the respective supply path 18 running in the through hole 19 runs, for example, in a gap between the through hole 19 and the fastening screw 24, in particular in a groove-shaped recess of the through hole 19.

[0066] The at least one distributor disk 20 is arranged, for example, in a central axial section of the stator body 4, so that two oppositely directed slot cooling paths 17 are formed in each stator slot, exiting at the ends of the respective stator slot 6 via a slot outlet 33. According to Fig. 2, at least two axially spaced distributor disks 20 or double disks 20 according to Fig. 6C are provided in the central axial section of the stator body 4, the distributor channels 21 of which each open into one of the flank recesses 15h of the spacer element 15 of the respective stator slot 6. For example, laminations of the stator lamination stack 40 are provided between the axially spaced distributor disks 20.

[0067] The electric machine 2 additionally has a rotor 30. An air gap 31 is formed between the stator 1 and the rotor 30.

[0068] The stator slots 6 are sealed, quasi-sealed or closed in the radial direction away from the stator yoke 10, i.e. towards the air gap 31, for example by means of at least one slot closure.

[0069] Fig. 3 shows a cross-section through one of the stator slots along the line Ill-Ill in Fig. 2 with two slot gaps 16 on the two tooth flanks 5f of the stator slot 6.

[0070] According to the exemplary embodiments, an axially extending and electrically insulating spacer element 15 can be provided in each of the stator slots 6. This spacer element establishes a distance between the conductor 11 or conductor bundle 12 and the tooth flanks 5f of the respective stator slot 6 and forms at least one slot gap 16 between the tooth flanks 5f and the conductor 11 or conductor bundle 12. The spacer element 15 is, for example, a folded body made of insulating paper, which forms a groove base 7 or further grooves.

[0071] - 9 -

[0072] The spacer element 15 comprises a central strip 15m lying at the base of the groove 8, on the long side edges of which a flank strip 15f, facing one of the tooth flanks 5f of the respective stator groove 6, is bent to form a fold edge. On the side edges of the flank strips 15f facing away from the central strip 15m, an end strip 15e can each be bent to form a fold edge. The central strip 15m and the end strips 15e of the respective spacer element 15 are arranged opposite each other in the radial direction with respect to the stator axis 3, as shown in Fig. 3. Flank recesses 15h are formed in the flank strips 15f of the respective spacer element 15 to form a groove gap channel 16. According to Fig.2. In at least one, and in particular both, flank strips 15f of the respective spacer element 15, at least one axial group, and in particular one axial pair, of flank recesses 15h arranged one behind the other in the axial direction can be formed, between which a radial separating web 15r extends in the radial direction. The radial separating web 15r can, for example, connect the central strip 15m of the spacer element 15 with one of the end strips 15e.

[0073] Fig. 4 shows a distributor disc according to the invention in a first embodiment.

[0074] According to the invention, at least one distribution channel 21 is formed in the respective distributor disk 20, which, as part of the supply path 18, opens directly into several stator grooves 6 via a flow connection formed in the distributor disk 20 and is arranged in the stator yoke 10 with a circumferentially extending circumferential section 21u. In particular, several, for example four, distribution channels 21, each with a circumferential section 21u, are formed in the respective distributor disk 20.

[0075] According to the first embodiment, the respective distributor disc 20 is a sheet metal lamella, wherein the respective distributor channel 21 is cut or punched out of the sheet metal lamella as a through slot extending in the axial direction.

[0076] The respective distributor disc 20 has a disc yoke 20y located in the stator yoke 10 or in the radial area of ​​the stator yoke 10, wherein the R. 414719

[0077] - 10 -

[0078] Circumferential section 21u of the respective distribution channel 21 is provided in or on the disc yoke 20y. The circumferential section 21u of the respective distribution channel 21 extends over a partial circumference of the disc yoke 20y, in particular over an angle of 45° to 120°, and / or is, for example, annular or partially annular.

[0079] The respective distributor disk 20 comprises, radially within the disk yoke 20y with respect to the stator axis 3, an annular arrangement of groove openings 26 for the passage of the conductors 11 or conductor bundles 12 of the stator winding 14, and disk teeth 25 between adjacent groove openings 26. The distributor disk 20 also has an inner ring 27 facing away from the disk yoke 20y for connecting the disk teeth 25. The annular arrangement of groove openings 26 is arranged radially between the disk yoke 20y and the inner ring 27.

[0080] Only some of the disc teeth 25, which are distributed particularly around the circumference, are attached to the disc yoke 20y as retaining teeth 25c via a retaining web 28. The number of retaining teeth 25c per distributor disc 20 corresponds, for example, to the number of distributor channels 21 of the distributor disc 20. Adjacent distributor channels 21 of the distributor disc 20 are each flow-separated from one another by one of the retaining webs 28.

[0081] According to the first embodiment, each distribution channel 21 opens into the multiple groove openings 26 at the bottom of the groove 7.

[0082] The respective feed channel 19 of the respective supply path 18 opens into the respective distribution channel 21 of the distribution disc 20 via a connecting channel 23 provided in the distribution disc 20. The connecting channel 23 extends in particular in a radial direction and / or can widen in particular in the direction of flow.

[0083] Fig. 5A shows a second embodiment of a distributor disc according to the invention, which according to a first variant is designed as a plastic part or a 2K injection molded part.

[0084] Fig. 5B shows a partial view of the distributor disc according to Fig. 5A. R. 414719

[0085] - 11 -

[0086] The groove openings 26 of the respective distributor disc 20 are each enclosed by a groove surround 36, which is partially or completely circumferential around the respective groove opening 26.

[0087] At least several of the groove surrounds 36 are attached to the disk yoke 20y by means of a retaining web 28. For example, the respective retaining web 28 can extend from the groove base 7 of the groove surround 36 and run radially with respect to the stator axis 3 to the disk yoke 20y. The retaining web 28 can traverse the circumferential section 21u of the distributor channel 21 in a radial direction. Retaining webs 28 that traverse a circumferential section 21u of a distributor channel 21 have a lower height in the axial direction than the groove surround 36 to allow flow past the retaining web 28.

[0088] According to the second embodiment, each distribution channel 21 can extend into at least one of the disc teeth 25 with at least one radial section 21r to open into the multiple groove openings 26. As shown in Fig. 5A and Fig. 5B, one radial section 21r of one of the distribution channels 21 is provided for each disc tooth 25.

[0089] Each distribution channel 21 has one or two radial sections 21r for each groove opening 26, each of which opens directly into one or two adjacent groove openings 26 via a groove inlet 22. For example, each radial section 21r opens into two adjacent groove openings 26 via two groove inlets 22.

[0090] According to Fig. 5B, two groove inlets 22 are formed on two opposite tooth flanks for each groove opening 26 or groove rim 36 of the distributor disc 20. The two groove inlets 22 per groove opening 26 or groove rim 36 can be arranged as a groove that does not extend axially, for example, on different end faces of the distributor disc 20. The two groove inlets 22 per radial section 21r are, for example, arranged on different end faces of the distributor disc 20.

[0091] According to Fig. 5B, at least one of the groove openings 26 or groove surrounds 36 of the respective distributor disk 20 can be connected to a conductor 11 or conductor bundle 12. R. 414719

[0092] - 12 - facing inner side have at least a projection 37 for guiding the conductor 11 or conductor bundle 12 when axially inserting the stator winding 14 into the stator slots 6.

[0093] Fig. 6A shows an alternative second embodiment of a distributor disc according to the invention, which in a second variant is designed as a sheet metal lamella.

[0094] Fig. 6B shows a partial view of the distributor disc according to Fig. 6A.

[0095] According to Fig. 6A and Fig. 6B, a radial section 21 r of one of the distribution channels 21 is provided for each disc tooth 25.

[0096] As in the first embodiment, in the alternative second embodiment only some of the disc teeth 25, which are distributed particularly around the circumference, are attached to the disc yoke 20y as retaining teeth 25c via a retaining web 28. The number of retaining teeth 25c per distributor disc 20 corresponds, for example, to the number of distributor channels 21 of the distributor disc 20. The retaining webs 28 projecting from the groove base 7 of the groove edges 36 according to Fig. 5A and Fig. 5B are omitted for the alternative embodiment according to Fig. 6A and Fig. 6B.

[0097] Each groove opening 26 or groove rim 36 and each radial section 21r has a groove inlet 22 formed as a slot extending axially. For example, all groove inlets 22 of the distributor disk 20 of the groove openings 26 are arranged on the same right or left tooth flank.

[0098] Fig. 6C shows two distributor disks arranged in reverse according to Fig. 6A and Fig. 6B, which can be arranged as a double disk in the stator body according to Fig. 1 and Fig. 2.

[0099] By means of the double-disc arrangement of two, in particular identical but laterally reversed, distributor discs, two groove inlets 22 are formed on different end faces of the double disc for each groove opening 26 or groove rim 36 of the double disc and for each radial section 21 r of the double disc. Due to the laterally reversed arrangement of the two R. 414719

[0100] - 13 -

[0101] Distributor discs 20 are the groove inlets 22 per groove opening 26 of the double disc arranged on both tooth flanks. By forming the double disc arrangement from two identical parts, the double disc arrangement as a distributor disc can be designed particularly simply and cost-effectively.

[0102] Fig. 7 shows a distributor disc according to the invention in a third embodiment.

[0103] According to the third embodiment, each distributor channel 21 has a circumferential section 21u and at least one radial section 21r. The radial section 21r in the third embodiment opens successively into the multiple slot openings 26 via a further circumferentially extending circumferential section 21w in the flow direction. Thus, a further circumferential section 21w adjoins each radial section 21r in the flow direction. In the further circumferential section 21w, the cooling fluid is divided or further divided among the multiple stator slots 6. The further circumferential section 21w extends in the distributor disk 20 directly along the inner ring 27 of the distributor disk 20 in the circumferential direction, for example in two opposite circumferential directions, and opens successively into the multiple slot openings 26 in the flow direction.

Claims

R. 414719 - 14 - Claims 1. Stator (1) of an electric machine (2) with a stator body (4) extending about a stator axis (3), on which stator teeth (5) and stator slots (6) located between the stator teeth (5) are formed, which has a stator yoke (10) connecting the stator teeth (5) and in particular comprises a stator lamination stack (40), wherein the stator slots (6) form a stator yoke (10) facing the groove base (7), wherein a single conductor (11) or a conductor bundle (12) comprising several conductors (11), in particular a stack of flat wire conductors, is arranged in each of the stator slots (6) to form an electrical stator winding (14), wherein between the tooth flanks (5f) of the respective stator slot (6) and the conductor arranged in the stator slot (6) (11) or conductor bundle (12) at least one slot gap (16) is provided which forms a slot gap channel extending in the axial direction with respect to the stator axis (3) and through which a cooling fluid, in particular oil, can flow along a slot cooling path (17), characterized in that - in the stator body (4) at least one supply path (18) is formed which leads to at least one of the stator slots (6) for the supply of cooling fluid to at least one slot cooling path (17), - in the stator body (4) at least one distributor disk (20) is arranged in which at least one distributor channel (21) is formed, which as part of the supply path (18) opens directly into several stator grooves (6) via a flow connection formed in the distributor disk (20) and is arranged in the stator yoke (10) with a circumferential section (21 u) extending in the circumferential direction.

2. Stator according to claim 1, characterized in that the respective distributor disk (20) has a disk yoke (20y) located in the stator yoke (10), wherein the circumferential section (21 u) of the respective distributor channel (21) is provided in or on the disk yoke (20y).

3. Stator according to claim 2, characterized in that the circumferential section (21 u) of the respective distributor channel (21) extends over a partial circumference of the disk yoke (20y), in particular over an angle of 45° to 120°, in particular in an annular or semi-annular shape. R. 414719 - 15 - 4. Stator according to one of claims 2 or 3, characterized in that the respective distributor disk (20) has a ring-shaped arrangement of slot openings (26) radially within the disk yoke (20y) for the passage of the conductors (11) or conductor bundles (12) of the stator winding (14) and disk teeth (25) between adjacent slot openings (26), wherein the distributor disk (20) comprises an inner ring (27) facing away from the disk yoke (20y) for connecting the disk teeth (25).

5. Stator according to claim 4, characterized in that the groove openings (26) of the respective distributor disk (20) are each enclosed by a groove surround (36) which is partially or completely circumferential around the respective groove opening (26).

6. Stator according to one of claims 4 or 5, characterized in that only some of the disc teeth (25), which are distributed in particular over the circumference, and / or several of the groove edges (26), in particular at the respective groove base (7), are attached to the disc yoke (20y) via a retaining web (28) each.

7. Stator according to one of claims 4 to 6, characterized in that the respective distribution channel (21) opens into the multiple slot openings (26) at a slot base (7) or extends to open into the multiple slot openings (26) with at least one radial section (21 r) into at least one of the disk teeth (25).

8. Stator according to claim 7, characterized in that the respective distribution channel (21) for opening into the several slot openings (26) has at least one radial section (21 r) per slot opening (26) which opens directly into a slot opening (26) or two adjacent slot openings (26) via a slot inlet (22).

9. Stator according to claim 7, characterized in that the respective radial section (21 r) of the respective distributor channel (21) opens successively into the several slot openings (26) via a further circumferentially extending circumferential section (21 w) in the direction of flow into the several slot openings (26). R. 414719 - 16 - 10. Stator according to one of claims 4 to 9, characterized in that at least one of the slot openings (26) of the respective distributor disk (20) has at least one projection (37) on an inner side facing the conductor (11) or conductor bundle (12) for guiding the conductor (11) or conductor bundle (12) when the stator winding (14) is axially inserted into the stator slots (6).

11. Stator according to one of the preceding claims, characterized in that the respective supply path (18) comprises a supply channel (19) which is provided for supplying cooling fluid into the respective distributor channel (21) of the respective distributor disk (20) and is in particular designed in or on the stator yoke (10), in particular as a circumferential channel or axial channel.

12. Stator according to claim 11, characterized in that the respective feed channel (19) opens into a respective distributor channel (21) via a connecting channel (23), wherein the connecting channel (23) extends in particular in a radial direction and / or widens in particular in the flow direction.

13. Stator according to one of the preceding claims, characterized in that the respective distributor disk (20) is a plastic part, a 2K injection molded part or a sheet metal lamella.

14. Stator according to one of the preceding claims, characterized in that the at least one distributor disk (20) is arranged in a central axial section of the stator body (4), so that in each stator groove (6) there are two groove cooling paths (17) running in opposite directions, which exit at the ends of the respective stator groove (6) via a groove outlet (33).

15. Stator according to one of the preceding claims, characterized in that the stator slots (6) are sealed or closed in the radial direction away from the stator yoke (10), in particular by means of a slot closure. R. 414719 - 17 - 16. Electric machine (2) with a stator (1) according to one of the preceding claims, with a rotor (30) and with an air gap (31) formed between the stator (1) and the rotor (30).

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