Stator for a drive motor, drive motor and motor vehicle with a drive motor

Abstract

The invention relates to a stator (10) for a drive motor (100) of a motor vehicle (K), with at least one stator tooth (20) which extends between opposing pole shoes (70) of the stator (10), with at least one stator winding (60) which is arranged between the opposing pole shoes (70) encompassing the stator tooth (20) in its circumferential direction (U) and with an insulation device (30) which is provided to form electrical insulation to prevent the formation of a creepage distance.The insulation device (30) has a first insulation area (40) arranged between the stator tooth (20) and the stator winding (60), which in its arrangement on the stator tooth (20) surrounds the stator tooth (20) circumferentially and which has tabs (41, 42) that project beyond the stator winding (60) in the vertical direction (H) of the stator (10) and / or in at least one vertical direction (X, Y) of the stator (10) perpendicular to the vertical direction (H) and at least partially cover a pole shoe surface area (72) adjacent to the stator tooth (10) of at least one first pole shoe (70) of the opposing pole shoes (70), wherein at least one air gap (43) extends along the pole shoe surface area (72) between two adjacent tabs (41, 42).Furthermore, the insulation device (30) has at least a second insulation area (50) which is supported at least indirectly on the pole shoe surface area (72) and is arranged covering the at least one air gap (43) between the pole shoe surface area (72) and the stator winding (60).

Description

[0001] The invention relates to a stator for a drive motor, comprising at least one stator tooth extending between opposing pole shoes of the stator, at least one stator winding arranged between the opposing pole shoes and encompassing the stator tooth in its circumferential direction, and an insulation device designed to provide electrical insulation to prevent creepage. Further aspects of the invention relate to a drive motor with such a stator and to a motor vehicle.

[0002] To avoid so-called creepage distances, which are associated with an unwanted transfer of electrical energy in electric drive machines, insulation measures are usually taken to separate the windings of the electric drive machines from other components of these drive machines.

[0003] For example, DE 10 2014 211 662 A1 discloses a stator for an electric axial flux machine comprising several pole shoes, electrical windings, and at least one insulation arrangement. The pole shoes are arranged in an arrangement plane along a circular line. The side surfaces of each pole shoe form an annular sector-shaped contour in the arrangement plane. The electrical windings are wound around the annular sector-shaped contour of the pole shoes. The insulation arrangement is located at least partially between the windings and the pole shoes. The insulation arrangement comprises at least one insulating element having two legs extending in the same direction, each connected by a connecting leg, the legs bearing against the radially outward and / or radially inward-facing side surfaces of a pole shoe.

[0004] EP 3 176 915 B1 discloses a known stator for an electric motor, comprising a stator core and two insulators, each insulator being located at one of the two axial ends of the stator core. Two insulating sheets are also provided, each sheet being attached to one of the two side faces of the stator core in a direction perpendicular to an axial direction of the stator core. Furthermore, a winding is provided around the stator core, to which the insulators and insulating sheets are attached. The side faces of each insulator are aligned with the side faces of a corresponding insulating sheet attached to the stator core such that the winding is wound around the stator core, to which the insulators and insulating sheets are attached, without a gap between the winding and each of the insulating sheets. A groove is formed in one of the side faces of each insulator, onto which the winding is wound.The groove forms a flange in the side face of the insulator, with one end of the flange opposite and spaced from the corresponding axial end of the stator core. An axial end of each insulating sheet, attached to the corresponding side face of the stator core and onto which the winding is wound, is inserted into the groove through a gap formed between the end of the flange and the corresponding axial end of the stator core.

[0005] The object of the present invention is to provide an improved, lightweight stator that contributes to the reliable operation of a drive motor. Furthermore, the invention aims to provide a drive motor with such a stator and a motor vehicle with such a drive motor.

[0006] This problem is solved by a stator with the features of claim 1, by a drive motor with the features of claim 9, and by a motor vehicle with the features of claim 10. Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims.

[0007] A first aspect of the invention relates to a stator for a motor vehicle drive motor, comprising at least one stator tooth extending between opposing pole shoes of the stator, at least one stator winding arranged between the opposing pole shoes, encompassing the stator tooth in its circumferential direction, and an insulation device designed to provide electrical insulation to prevent creepage. The term "encompassing" means that the stator winding extends circumferentially around the stator tooth.

[0008] According to the invention, the insulation device is provided for - has a first insulation area arranged between the stator tooth and the stator winding, which in its arrangement on the stator tooth surrounds the stator tooth circumferentially and which has tabs that project beyond the stator winding in the vertical direction of the stator and / or in at least one vertical direction of the stator perpendicular to the vertical direction and at least partially cover a pole shoe surface area adjacent to the stator tooth of at least one first pole shoe of the opposing pole shoes, wherein at least one air gap extends along the pole shoe surface area between two adjacent tabs, and - has at least a second insulation area which is supported at least indirectly on the pole shoe surface area and is arranged covering at least one air gap between the pole shoe surface area and the stator winding.

[0009] This is advantageous because the air gap created by the first insulating zone between the two adjacent tabs is covered by the second insulating zone, thus preventing, for example, the formation of a creepage distance between the pole shoe surface area and the stator winding. The pole shoe surface area can, in particular, be directly adjacent to the stator tooth. Preferably, the stator tooth can transition directly into the respective pole shoe. The pole shoe surface can be oriented at an angle to the stator tooth, allowing the tabs of the first insulating zone to also be oriented at this angle to the stator tooth. The insulating device can preferably comprise at least one fibrous material, in particular insulating paper.In other words, the first insulation area and the second insulation area can each comprise at least one fibrous material, in particular insulating paper. Preferably, the first insulation area and the second insulation area are designed as separate components, which simplifies handling of the respective insulation areas during their assembly on the stator tooth or pole shoe. Preferably, two second insulation areas can be provided, one of which serves to cover the air gap of the pole shoe surface area of ​​the first pole shoe, and another of which can be arranged opposite it in the vertical direction on a second pole shoe surface area of ​​a second pole shoe of the two pole shoes to cover the air gap there. In addition to the at least one air gap, further air gaps can accordingly be provided.All air gaps can, for example, be triangular in shape.

[0010] The invention is based on the understanding that, due to disadvantageous insulation, the stator teeth of conventional electrical machines are longer than necessary for an electromagnetically optimal design, particularly by the amount of an air gap or creepage distance. Consequently, more material is used in these conventional stator teeth, making them not only heavier and longer than required, but also resulting in electromagnetic losses. The invention addresses this issue by eliminating creepage distances through the use of separate insulation zones. When the first insulation zone is arranged between the respective tabs, any air gaps that arise are covered by the second insulation zone.This advantageously eliminates the need to avoid creepage distances during stator manufacturing due to length constraints, allowing the stator to be made more compact and with less material than is required for stators of conventional electrical machines, without the formation of creepage distances.

[0011] The first insulation section can have at least a substantially rectangular outer contour before it is wrapped circumferentially around the stator tooth during assembly. During assembly, the first insulation section can be placed in a ring-like shape around the stator tooth. The tabs can be separated from each other by edge-mounted, vertically extending cuts in the first insulation section. If the tabs are folded over during assembly to at least indirectly support, directly attach to, and / or form against the pole shoe surface area, at least one air gap can form between each pair of adjacent tabs.

[0012] In a further advantageous embodiment of the invention, opposing insulation region ends of the first insulation region overlap, at least partially, in its arrangement between the stator winding and the stator tooth. This is advantageous because it allows the formation of a creepage path around the circumference of the stator tooth to be avoided in a particularly simple manner.

[0013] In a further advantageous embodiment of the invention, the first insulation area has at least four tabs which partially cover the pole shoe surface area. This is advantageous because it enables a large-area coverage of the pole shoe surface area even with a polygonal, and in particular quadrilateral, outer contour of the stator tooth extending circumferentially around the stator. Preferably, the first insulation area can have at least five tabs, and more preferably exactly five tabs, wherein two of these tabs can overlap each other at least partially in the circumferential arrangement of the first insulation area around the stator tooth. This enables a particularly reliable prevention of creepage paths.

[0014] In a further advantageous embodiment of the invention, the at least one air gap is arranged at an edge rounding region and additionally or alternatively spaced apart in the vertical direction from the edge rounding region, via which adjacent stator tooth side surfaces are connected to each other in the circumferential direction of the stator tooth.

[0015] In a further advantageous embodiment of the invention, the second insulation area, when arranged on the pole shoe surface area, surrounds the pole shoe surface area in a circumferential ring and has an insulation element supported at least indirectly on the pole shoe surface area, with an inner contour that surrounds the stator tooth in a ring. This is advantageous because it provides particularly precise coverage of the pole shoe surface area and effectively prevents creepage between the pole shoe surface area and the stator winding. Preferably, the ring-shaped insulation element of the second insulation area can cover at least 90%, preferably 95%, and most preferably 100% of the pole shoe surface area.

[0016] In a further advantageous embodiment of the invention, the inner contour is at least substantially formed against an outer contour of the stator tooth extending in the circumferential direction of the stator tooth. This is advantageous because the inner contour of the insulating part of the second insulating area can thus lie particularly close to the outer contour of the stator tooth in its circumferential direction, which contributes to a particularly effective prevention of creepage distances.

[0017] In a further advantageous embodiment of the invention, the second insulation area has at least one inner tab which extends in the vertical direction between the opposing pole shoes, providing at least indirect support of the second insulation area to the pole shoe surface area. This is advantageous because the inner tab of the second insulation area thus contributes to preventing creepage distances between the stator winding and the stator tooth. The at least one inner tab can be oriented in the direction of the stator tooth and at least indirectly attached to it.

[0018] In a further advantageous embodiment of the invention, a number of the inner tabs correspond to at least a number of the air gaps. This advantageously provides at least one inner tab for each air gap. Preferably, four inner tabs can be provided, which adjoin four air gaps and / or at least partially cover them.

[0019] A second aspect of the invention relates to a drive machine with a stator according to the first aspect of the invention. This drive machine has an improved, lightweight stator, which contributes to the reliable operation of the drive machine. The drive machine can also be referred to as an electric machine or an electric motor. The drive machine can be designed as an axial flux machine.

[0020] A third aspect of the invention relates to a motor vehicle with a drive motor according to the second aspect of the invention. Such a motor vehicle enables particularly reliable operation.

[0021] The preferred embodiments and their advantages presented with respect to one of the aspects apply accordingly to the other aspects of the invention and vice versa.

[0022] The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the figure description and / or shown in the figures alone, can be used not only in the combination specified in each case, but also in other combinations or on their own, without leaving the scope of the invention.

[0023] Further advantages, features and details of the invention will become apparent from the claims, the following description of preferred embodiments and the drawings.

[0024] The invention is explained below again using a specific embodiment. This is illustrated by: Fig. 1 a schematic perspective view of a section of a stator of an abstractly represented drive machine designed as an axial flux machine, which serves to drive a motor vehicle also abstractly represented; Fig. 2 a schematic perspective view of a stator tooth and a pole shoe of the stator; Fig. 3 a further schematic perspective view of the stator tooth and the pole shoe, wherein a first insulation area, which has a winding area surrounding the stator tooth in its circumferential direction and several tabs projecting from it, is arranged on the stator tooth, wherein by a bending of the tabs respective, in particular triangular, air gaps are formed between each two adjacent tabs; Fig. 4 a further schematic perspective view of the stator tooth and the pole shoe, wherein in addition to the first insulation area a second insulation area is arranged on the stator tooth and the pole shoe and wherein the second insulation area covers the respective air gaps; Fig. 5 an enlarged representation of a first arrangement variant in which the first insulation area is supported on the stator tooth and the pole shoe and the second insulation area rests on the first insulation area, whereby the second insulation area rests indirectly on the stator tooth and a pole shoe surface area of ​​the pole shoe via the interposition of the first insulation area; Fig. 6 an enlarged representation of a second arrangement variant in which the second insulation area is supported on the stator tooth and the pole shoe and the first insulation area rests at least partially on the second insulation area, whereby the first insulation area rests partially on the stator tooth and the pole shoe surface area of ​​the pole shoe via the interposition of the second insulation area; Fig. 7. A perspective view of the first insulation area and the second insulation area, showing the respective inner flaps of the second insulation area; and Fig. 8 an assembly of a stator component in which the first insulation area and the second insulation area prevent the formation of a creepage distance between a stator winding of the stator and the stator tooth and the pole shoe.

[0025] Fig. Figure 1 shows an abstract representation of a motor vehicle K with a drive motor 100. The drive motor 100 is designed here as an axial flux machine and comprises a section shown in Fig. 1 Stator 10 shown in perspective view.

[0026] The stator 10 comprises a plurality of stator teeth, of which only a single stator tooth 20 is shown here for the sake of clarity, which is in Fig. 2 is clearly recognizable. The stator tooth 20 extends between opposing pole shoes 70 of the stator 10. For clearer recognition, only a single pole shoe 70 of the opposing pole shoes 70 is shown here, which is subsequently also referred to as the first pole shoe 70.

[0027] The stator 10 comprises a Fig. 1 in part as well as in Fig. Figure 8 shows a perspective view of the stator winding 60, which is arranged between the opposing pole shoes 70, encompassing the stator tooth 20 in its circumferential direction U. In other words, the stator winding 60 extends around the stator tooth 20 in the circumferential direction U. Fig. Figure 3 is the only one of the figures to show double arrows, which illustrate the circumferential direction U, a vertical extension direction H of the stator 10, as well as a first extension direction X and a second extension direction Y.

[0028] An insulating device 30 of the stator 10, formed here from insulating paper, is designed to provide electrical insulation to prevent the formation of a creepage distance. The insulating device 30 thus serves to prevent a spark gap. The insulating device 30 comprises a total of three insulating sections, of which a first insulating section 40 and a second insulating section 50 are shown here. Although two instances of the second insulating section 50 are provided for each stator tooth 20, for the sake of clarity, and also with regard to the pole shoes 70, only one of the two identical second insulating sections 50 is shown.

[0029] The first insulation area 40, arranged between the stator tooth 20 and the stator winding 60, which circumferentially surrounds the stator tooth 20 in its arrangement on the stator tooth 20, has a plurality of tabs 41, 42 that project beyond the stator winding 60 in the vertical direction H of the stator 10 and / or in at least one of the vertical directions X, Y of the stator 10 perpendicular to the vertical direction H, as well as in Fig. 8 can be seen.

[0030] The tabs 41, 42 of the first insulation area 40 cover, on the one hand, a pole shoe surface area 72 of the first pole shoe 70 of the opposing pole shoes 70 adjacent to, in particular directly adjacent to, the stator tooth 10, at least partially, wherein an air gap 43 extends along the pole shoe surface area 72 between each pair of adjacent tabs 41, 42, as is particularly evident in Fig. 3 and Fig. 7 can be seen. The pole shoe 70 with its pole shoe surface area 72 is designed as a collar circumferentially U around the stator tooth 20, which projects beyond the stator tooth 20 in the corresponding extension directions X, Y.

[0031] Fig. Figure 7 shows the first insulation region 40 and the second insulation region 50 separately, each before their mounting on the stator tooth 20. Two opposing insulation region ends 44, 45 of the first insulation region 40 are visible, which overlap at least partially in its arrangement between the stator winding 60 and the stator tooth 20. The first insulation region 40 comprises a winding region 46, which surrounds the stator tooth 20 on its circumferential side and thus in the circumferential direction U when the first insulation region 40 is mounted on the stator tooth 20. The winding region 46 can have an outer contour that is at least substantially rectangular, as shown in Fig. 7 can be seen. The winding area 46 can be wound around the stator tooth 20 in a band-like fashion. On opposite sides abutting the pole shoe surface area 72, the first insulation area 40 can be provided with multiple slots, for example four slots, i.e., with slots, in particular four slots, through which the tabs 41, 42, separated from each other in sections, are formed. When the first insulation area 40 is formed against the stator tooth 20 and the pole shoe surface area 72, the tabs 41, 42 are angled relative to the winding area 46 and thereby bent in the respective directions X, Y, thus widening the slots to form the air gaps 43.As a result of the angling of the tabs 41, 42 relative to the winding area 46 and as a result of the attachment of the tabs 41, 42 to the pole shoe surface area 72, the air gaps 43 acquire a triangular shape, whereby the air gaps 43 widen away from the stator tooth 20 and the winding area 46 and towards an outer edge 74 of the pole shoe 70.

[0032] The first insulation section 40 can be placed around the stator tooth 20 in the circumferential direction U during assembly until the two insulation section ends 44, 45 overlap at a connection point. Adhesive can be applied to this connection point, for example, allowing the insulation section ends 44, 45 to be easily bonded together so that the first insulation section 40 securely surrounds the stator tooth 20, particularly around its circumference, as shown in Fig. 3 is evident. The in Fig. The initially barely perceptible air gaps 43 between the respective adjacent tabs 41, 42 are widened into a triangular shape when the tabs 41, 42 are attached to the pole shoe surface area 72, as can be seen by looking together at Fig. 7 with Fig. 3 can be seen. When the tabs 41, 42 are attached to each pole shoe 70, at least four tabs 41, 42 of the first insulation area 40 partially cover the pole shoe surface area 72.

[0033] When considering together Fig. 2 and Fig. Figure 3 shows that on the pole shoe 70, one of the air gaps 43 is arranged at each edge radius region 21 and additionally or alternatively, spaced apart in the vertical direction H from the respective edge radius region 21 at the level of the pole shoe surface region 72. At each of the edge radius regions 21 extending in the vertical direction H, two stator tooth side surfaces 22, 23 adjacent in the circumferential direction U of the stator tooth 20 are connected to each other. Thus, at each of the four edge radius regions 21, one of the air gaps 43 per pole shoe 70 is arranged. In the vertical direction H, two air gaps 43 are therefore opposite each other, which in Fig. 8 is recognizable.

[0034] In Fig. The air gaps 43 are those which are triangularly widened at the deformed tabs 41, 42, which bear against the depicted pole shoe 70 or its pole shoe surface 72, and are largely covered by the second insulation area 50. The opposite tabs 41, 42, however, are in an undeformed state 48 due to the absence of the further pole shoe there, which is why the air gaps 43 there are slit-shaped.

[0035] The second insulation area 50, arranged between the pole shoe surface area 72 and the stator winding 60, serves to cover the air gaps 43 opposite the stator winding 60, also referred to as "winding 60", in order to prevent the formation of undesirable creepage distances at these air gaps 43.

[0036] From the combination of Fig. 4, Fig. 5 and Fig. 6 shows that the second insulation area 50 can either be indirectly supported on the pole shoe surface area 72, which in Fig. 4 and Fig. 5 is recognizable by the fact that the second insulation area 50, more precisely an insulating part 51 of the second insulation area 50 formed in a circumferential U-shape, rests on the tabs 41, 42, whereby the second insulation area 50 is supported on the pole shoe surface area 72 by means of the tabs 41, 42 and thus indirectly. In contrast, Fig. 6, that the insulating part 51 of the second insulating area 50 can instead also be directly supported on the pole shoe surface area 72, whereby in this case the tabs 41, 42 are indirectly supported on the pole shoe surface area 72 by means of the insulating part 51.

[0037] A compilation of Fig. 4 and Fig. Figure 7 further clarifies that the second insulation area 50, more precisely its insulation part 51, can surround the pole shoe surface area 72 in a ring-like manner in the circumferential direction U. The insulation part 51, which is directly or indirectly supported on the pole shoe surface area 72, can have an inner contour 52 that surrounds the stator tooth 20 in a ring-like manner and which can have a shape at least mathematically similar to that of the stator tooth 20 in the circumferential direction U, as can be seen by considering the following: Fig. 2 and Fig. 7 is recognizable. The inner contour 52 is therefore essentially aligned with an outer contour 29 extending in the circumferential direction U of the stator tooth 20 (see Fig. 2) of the stator tooth 20.

[0038] At each corner region 56 of the second insulation region 50, each corner region 56 being arranged at each edge rounding region 21, the inner contour 52 deviates from its mathematical similarity to the outer contour 29 of the stator tooth 20, because inner tabs 53, 54 of the second insulation region 50 project radially inwards at the corner regions. The four inner tabs 53, 54 extend in the (direct or indirect) support of the second insulation region 50 on the pole shoe surface region 72 in the vertical direction H between the opposing pole shoes 70. Each of the inner tabs 53, 54 can extend along each edge rounding region 21, particularly in the vertical direction H, to help prevent creepage distances. Based on Fig.Figure 7 shows that a number of inner tabs 53, 54 per pole shoe 70 corresponds to a number of air gaps 43 per pole shoe 70 or per pole shoe surface area 72.

[0039] In summary, a three-part division of the insulating device 30, formed from insulating paper, is provided, comprising the first insulating section 40 and the two second insulating sections 50. The insulating device 30 allows the air gap and creepage distance between the winding 60 and the stator tooth 20 or the pole shoe 70 to be maintained over a minimal distance. The first insulating section 40, also referred to as the middle section or center part, formed from insulating paper, is cut at its four corners, thereby forming the slots that are widened to create the air gaps 43 during the assembly of the first insulating section 40, i.e., during the winding of the first insulating section 40 circumferentially U around the stator tooth 20.The second insulation sections 50, also referred to as further pieces or end pieces, which are arranged on the end face of the stator tooth 20 and are also made of insulating paper, are arranged in such a way that they protect the pole shoes 70 from the windings 60, thus preventing the formation of creepage distances between the winding 60 and the pole shoes 70. The shape of these pieces (center piece, end pieces) encloses the corners, i.e., the rounded edge areas 21 of the stator teeth 20 of the stator 10, so that the air and creepage distances are maintained even around the corners. Depending on the voltage, these shapes can be adapted, for example. Depending on the design of the stator 10, the outer areas (e.g., at the outer edge 74 of the pole shoe) of the pole shoe 70 can or must also be protected by the same type (section) of insulating paper (insulating device 30). Reference symbol list 10 Stator 20 Stator tooth 21 Edge rounding area 22 Stator tooth side surface 23 Stator tooth side surface 29 Outer contour 30 Insulation device 40 first insulation area 41 tab 42 tab 43 air gap 44 End of insulation area 45 End of insulation area 46 Wrapping area 48 undeformed state 50 second insulation area 51 Insulation part 52 Inner contour 53 Inner flap 54 inner flap 56 Corner area 60 Stator winding 70 pole shoe 72 Pole shoe surface area 74 Pole shoe outer edge 100 drive machine K motor vehicle H High extension direction U circumferential direction X first extension direction Y second direction of extension QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2014 211 662 A1

[0003] EP 3 176 915 B1

[0004]

Claims

[1] Stator (10) for a drive motor (100) of a motor vehicle (K), with at least one stator tooth (20) which extends between opposing pole shoes (70) of the stator (10), with at least one stator winding (60) which is arranged between the opposing pole shoes (70) encompassing the stator tooth (20) in its circumferential direction (U) and with an insulation device (30) which is provided to form electrical insulation to prevent the formation of a creepage distance, characterized by , that the insulation device (30) - a first insulation area (40) arranged between the stator tooth (20) and the stator winding (60), which in its arrangement on the stator tooth (20) surrounds the stator tooth (20) circumferentially and which has tabs (41, 42) that project beyond the stator winding (60) in the vertical direction (H) of the stator (10) and / or in at least one vertical direction (X, Y) of the stator (10) perpendicular to the vertical direction (H) and at least partially cover a pole shoe surface area (72) adjacent to the stator tooth (10) of at least one first pole shoe (70) of the opposing pole shoes (70), wherein at least one air gap (43) extends along the pole shoe surface area (72) between two adjacent tabs (41, 42), and - has at least a second insulation area (50) which is supported at least indirectly on the pole shoe surface area (72) and is arranged covering at least one air gap (43) between the pole shoe surface area (72) and the stator winding (60). [2] Stator (10) according to claim 1, characterized by , that opposing insulation area ends (44, 45) of the first insulation area (40) overlap at least partially in its arrangement between the stator winding (60) and the stator tooth (20). [3] Stator (10) according to claim 1 or 2, characterized by , that the first insulation area (40) has at least four tabs (41, 42) which partially cover the pole shoe surface area (72). [4] Stator (10) according to any one of the preceding claims, characterized by, that at least one air gap (43) is arranged at an edge rounding area (21) and / or in the vertical direction (H) spaced apart from the edge rounding area (21) over which adjacent stator tooth side surfaces (22, 23) are connected in the circumferential direction (U) of the stator tooth (20). [5] Stator (10) according to any one of the preceding claims, characterized by , that the second insulation area (50) in its arrangement on the pole shoe surface area (72) surrounds the pole shoe surface area (72) in a ring-shaped circumferential direction (U) and has an insulation part (51) supported at least indirectly on the pole shoe surface area (72) with an inner contour (52) surrounding the stator tooth (20) in a ring-shaped manner. [6] Stator (10) according to claim 5, characterized by , that the inner contour (52) is at least substantially formed against an outer contour (29) of the stator tooth (20) extending in the circumferential direction (U) of the stator tooth (20). [7] Stator (10) according to claim 5 or 6, characterized by , that the second insulation area (50) has at least one inner flap (53, 54) which extends in the at least indirect support of the second insulation area (50) on the pole shoe surface area (72) in the vertical direction (H) between the opposing pole shoes (70). [8] Stator (10) according to claim 7, characterized by , that a number of the inner tabs (53, 54) corresponds to at least a number of the air gaps (43). [9] Drive machine (100) with a stator (10) according to one of the preceding claims. [10] Motor vehicle (K) with a drive motor (100) according to claim 9.

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