Active part for electric machine, in particular of motor vehicle, motor machine of motor vehicle, and method for producing such active part

Abstract

The invention relates to an active part (1) for an electric machine, comprising: a carrier body (2) having a plurality of grooves (3) which are closed by respective groove bases (8) in a first direction (7) extending in a radial direction (6) of the active part (1) and which are open in a second direction (9) extending in the radial direction (6) of the active part (1) and opposite the first direction (7); and at least one winding (11) supported by the support body (2) and having a winding region (12) arranged in the recess (3) of the support body (2), a respective partial region (TB1) of a respective winding region (12) arranged in a respective recess (3), which partial region is consecutive in the circumferential direction (4) of the active component (1), overlaps a respective wall region (W) of the carrier body (2), which wall region is spaced apart from one another and opposite one another in the circumferential direction (4) of the active component (1), in a second direction (9), a respective wall region (W) of the carrier defines a respective slot (16) of the respective recess (3) in the circumferential direction (4) of the active part (1).

Description

Technical Field

[0001] The present invention relates to an active component, in particular for an electric motor of a motor vehicle, according to the preamble of claim 1. The invention also relates to an electric motor for a motor vehicle. Furthermore, the invention relates to a method for producing such an active component for an electric motor according to the preamble of claim 9. Background Art

[0002] DE 10 2020 105 600 A1 discloses a stator for a motor vehicle electric motor, comprising a retaining body forming radially extending stator grooves, a plurality of stator windings radially successively inserted into the corresponding stator grooves, and a slot wedge arranged at the radially inner end of the stator groove. Summary of the Invention

[0003] The object of the present invention is to provide an active component for an electric machine, an electric machine for a motor vehicle, and a method for producing such an active component, which allow particularly advantageous production of the active component.

[0004] According to the invention, this object is achieved by an active component having the features of claim 1, an electric machine having the features of claim 8, and a method having the features of claim 9. Advantageous embodiments of the invention are the subject matter of the dependent claims.

[0005] A first aspect of the present invention relates to an active component for an electric motor, particularly for a motor vehicle. The active component can be a rotor of the electric motor, or preferably, a stator of the electric motor. The active component has a carrier body, preferably configured as a laminated core. The carrier body has grooves arranged, for example, one after the other, in the circumferential direction of the active component. In other words, in its finished state, the electric motor comprises a stator and a rotor, the rotor being drivable by the stator and thus rotatable relative to the stator about the motor's axis of rotation. For example, the rotor and / or the stator can be configured as the active component of the present invention. The active component circumferentially surrounds the motor's axis of rotation. The respective grooves are blocked or closed (particularly completely) along a first direction extending in the radial direction of the active component by a respective groove bottom and are thus defined. The radial direction, and therefore the first direction, extends perpendicular to the motor's axis of rotation and thus in a plane perpendicular to the motor's axis of rotation, wherein the circumferential direction also extends in this plane. The characteristic "the first direction extends in the radial direction of the active component" can be understood to mean, in particular, that the first direction coincides with the radial direction of the active component. The corresponding grooves are open along a second direction, extending radially from the active element and opposite to the first direction, such that, for example, the corresponding grooves themselves (i.e., in themselves) open into or enter the surroundings of the carrier body itself (i.e., in themselves) along the second direction. Thus, the second direction extends perpendicularly to the motor's axis of rotation, being opposite to the first direction. The second direction thus extends in the aforementioned plane. In particular, the feature "the second direction extends radially from the active element" should be understood to mean that the second direction coincides with the radial direction.

[0006] Furthermore, the active component has a winding which is designed separately from the carrier and is supported by (and therefore held on) the carrier, wherein corresponding winding regions of the winding are arranged in corresponding recesses in the carrier.

[0007] To enable particularly advantageous production of the active component, the present invention provides that the respective partial regions of the respective winding region, which are arranged in the respective groove and are consecutive in the circumferential direction of the active component and are also referred to as first partial regions, overlap in the second direction with respective wall regions of the carrier body that are spaced apart from and opposite each other in the circumferential direction of the active component. The respective wall regions of the carrier body that overlap in the second direction with the respective first partial regions define (in particular directly) the respective through-slots of the respective groove in the circumferential direction of the active component. This is achieved in particular by having side faces (in particular end faces) of the wall regions that overlap in the second direction with the respective first partial regions of the respective winding region, for example, spaced apart from each other in the circumferential direction of the active component, opposite each other in the circumferential direction of the active component, and facing each other in the circumferential direction of the active component, define (in particular directly) the respective slots in the circumferential direction of the active component. Thus, the respective slots of the respective grooves are, for example, the respective first length regions of the respective grooves, wherein the respective second length regions of the respective grooves are, for example, connected (in particular directly) to the respective first length regions of the respective grooves in the first direction. Conversely, the respective first length region of the respective groove is connected (in particular directly) to the respective second length region of the respective groove in the second direction. In particular, it is provided that the respective winding region is arranged only in the respective second length region with reference to the respective first length region and the respective second length region of the respective groove, so that the respective slot of the respective groove preferably has no corresponding winding region arranged in the respective groove. In particular, it is provided, for example, that the respective second length region of the respective groove is connected (in particular directly) to the respective wall region that delimits the respective slot of the respective groove in the first direction.

[0008] Because the respective wall regions of the carrier body that define the respective slots of the respective grooves in the circumferential direction of the active element are spaced apart from one another in the circumferential direction of the active element, the respective grooves open into the surroundings of the carrier body itself (i.e., in its own right) in the second direction via the respective slots of the respective grooves. In other words, the respective slots of the respective grooves are respective through-holes, also called through-slots, wherein the respective through-holes, and therefore the respective slots of the respective grooves, open into the respective second length region of the respective groove in the first direction (in particular directly), and the respective through-holes, and therefore the respective slots of the respective grooves, open into the surroundings of the carrier body itself (i.e., in its own right) in the second direction. Thus, for example, a respective second partial region of the respective winding region, arranged between the respective first partial regions of the respective winding region in the circumferential direction of the active element, overlaps with the respective slots of the respective groove in the second direction. The corresponding wall regions of the corresponding slots of the carrier body that define the corresponding grooves along the circumferential direction of the active component therefore overlap, for example, with the corresponding first partial regions of the corresponding winding regions along the second direction, but do not overlap with the corresponding second partial regions of the corresponding winding regions arranged in the corresponding grooves. If the active component is, for example, the stator described above, the grooves are also referred to as stator grooves, and the windings are also referred to as stator windings. If the active component is, for example, a rotor or a rotor described above, the grooves are also referred to as rotor grooves, and the windings are also referred to as rotor windings.

[0009] Furthermore, the present invention provides that a closing element, separate from the carrier and separate from the winding, is arranged in at least one of the slots, with which the winding region arranged in the recess having the at least one slot is pressed in a first direction and thus against the slot bottom of the recess having the at least one slot. For example, a first number of recesses and slots is provided. In principle, it is conceivable to arrange a closing element in each slot. Furthermore, it is conceivable, for example, to arrange corresponding closing elements in a second number of slots that is less than the first number.

[0010] In the following, the groove having the at least one slot and having the closure arranged in the slot is also referred to as "at least one groove", and the winding area arranged in the at least one groove is also referred to as "at least one winding area" in the following to achieve greater readability of the present disclosure.

[0011] Firstly, the present invention makes it possible to reliably avoid excessively large cavities in the at least one groove by pressing the at least one winding region against the groove bottom of the at least one groove, in particular against the groove bottom of the at least one groove, via the sealing element. Thus, for example, if the winding region is impregnated with a resin by adding the resin to the groove, excess resin can accumulate in the at least one groove, flow out of the at least one groove or drip out, and, for example, penetrate undesirably into certain areas and / or come into contact with components. Secondly, the present invention also makes it possible to manufacture the active component in a time-saving and cost-effective manner, since overly complex groove geometries can be avoided, as well as complex, time-consuming, and cost-intensive designs of the sealing element. In particular, the sealing element can be designed with a simple and therefore economical geometry and can be manufactured from cost-effective materials.

[0012] The background of the present invention is as follows: During testing, it was discovered that the insulation of the winding heads of electric machines, particularly stators, was damaged, with the damage occurring where there was excess resin (also called impregnation resin). The damage was caused by thermomechanical stresses at the interface between the wire forming the winding head, particularly enameled copper wire, and the excess resin. The wire is an enameled copper wire, comprising a wire body and a coating applied to the wire body. The coating is particularly a lacquer, for example, made of a plastic. It was found that the wire coating, which had previously aged due to thermomechanical stresses, could tear and fall off the wire body. It was found that with conventional solutions, the winding regions in the grooves of the carrier body did not lie evenly and tightly against the inner surface of the carrier body that defined (particularly directly defined) the grooves. For example, successive length regions of the respective winding regions in the radial direction of the active component did not lie evenly and tightly against one another. This resulted in excessively large cavities in the grooves. If the aforementioned resin were then introduced into the grooves, for example by a drip impregnation method, there would no longer be sufficient capillary action, so that some of the resin would flow out of the grooves and into the winding heads. However, a connecting gap is required between the respective winding region and the carrier, in particular the inner surface, to enable the winding region to be arranged (in particular, installed) in the groove. This connecting gap, for example due to shape and / or positional tolerances of the winding region and / or the respective length regions of the respective winding region, can result in uneven distances between the respective length regions of the respective winding region and / or between the respective winding region and the respective inner surface of the carrier, thereby causing the connecting gap to be concentrated in certain locations or regions and forming larger cavities. With the closure element provided according to the present invention, by pressing the at least one winding region in a first direction, thereby pressing against the groove bottom of the at least one groove, the distance or gap between the at least one winding region and the surface of the carrier (also referred to as the inner surface) that (in particular) directly defines the at least one groove can be kept small, and / or an excessive distance between the length regions of the at least one winding region, thereby preventing an excessively large cavity in the at least one groove, can be avoided. Consequently, the amount of resin that may need to be introduced into the at least one groove can be kept small. Furthermore, a favorable capillary action can be ensured in the at least one groove, thereby preventing excess resin from flowing out of the at least one groove and undesirably penetrating certain areas and / or undesirably coming into contact with components.

[0013] In particular, it is provided that the respective slots of the respective grooves have a first width extending in the circumferential direction of the active part, which is also referred to as the slot width. For example, the respective second length region of the respective grooves has a second width extending in the circumferential direction of the active part. Preferably, it is provided that the second width is constant over the entire extension of the respective second length region of the respective grooves extending in the radial direction of the active part. In this case, the second width is greater than the first width. The respective wall regions defining the respective slots in the circumferential direction of the active part are also referred to as teeth, slot teeth, tops, or slot tops. In particular, the respective second length region of the respective grooves is (in particular directly) defined in the circumferential direction of the active part by respective surfaces of the carrier body, also referred to as the inner surface, wherein the respective surfaces, in particular the inner surface, of the carrier body defining the respective second length region of the respective groove in the circumferential direction of the active part (in particular directly) are spaced apart from each other, opposite each other, and face each other in the circumferential direction of the active part. Because the first width is smaller than the second width, and the second width is comprised of the corresponding surface, and the first width is comprised of the corresponding wall region (particularly, the corresponding surface) of the corresponding slot defining the corresponding groove, the corresponding inner surface of the carrier body defining the corresponding second length region of the corresponding groove in the circumferential direction of the active element is recessed inward relative to the corresponding wall region of the carrier body defining the corresponding groove, particularly relative to the corresponding surface of the corresponding wall region of the carrier body defining the corresponding slot of the corresponding groove, in the circumferential direction of the active element. Conversely, the corresponding wall region of the corresponding slot defining the corresponding groove protrudes relative to the corresponding inner surface of the carrier body defining the corresponding second length region of the corresponding groove in the circumferential direction of the active element, or the corresponding wall region of the carrier body defining the corresponding slot of the corresponding groove protrudes relative to the corresponding inner surface of the carrier body defining the corresponding second length region of the corresponding groove in the circumferential direction of the active element. In short, the corresponding second length region of the corresponding groove is wider than the corresponding slot of the corresponding groove in the circumferential direction of the active element. The closure element therefore does not have to be too rigid and does not have to fit too precisely, so that a simple and economical construction design of the closure element is ensured.

[0014] In particular, the present invention allows for the introduction of less resin into the grooves compared to conventional solutions. Any gaps that may occur in the grooves are effectively filled with resin, thereby providing a particularly advantageous thermally conductive connection between the winding area and the carrier. Furthermore, a particularly high partial discharge resistance can be achieved, since an excessive number of small air bubbles in the resin contained in the grooves can be avoided. Furthermore, the resin can be distributed more evenly in the grooves compared to conventional solutions. The resin has three functions: It serves to secure the winding area in the grooves. The resin should conduct heat effectively, in particular from the winding to the carrier. Therefore, it is advantageous if the resin is distributed as widely as possible in the grooves. Furthermore, the resin should also achieve an advantageously high partial discharge resistance. For this purpose, it is advantageous if the resin contains no or as few small air bubbles as possible. Due to the use of a sealing element, which advantageously compresses the winding area or winding in the grooves, all three functions can be advantageously fulfilled in the present invention.

[0015] In order to enable particularly economical and therefore particularly advantageous production of the active part, one embodiment of the invention provides that the closure part is made of a non-magnetic material, preferably providing that the closure part—in particular, the entire closure part—is non-magnetic. This allows the costs of the closure part itself, and therefore the costs of the active part overall, to be kept particularly low.

[0016] In order to achieve a particularly economical and lightweight design of the active part, a further embodiment of the invention provides that the closure part is produced from plastic.

[0017] In another particularly advantageous embodiment of the present invention, the closing element engages from behind (in particular, along the first direction) with the wall region defining the at least one slot, thereby securing the closing element to the carrier. In particular, the closing element is thus locked to the carrier. This allows for particularly simple, time-saving, and cost-effective production of the active element.

[0018] Another embodiment is characterized in that the winding is designed as a hairpin winding (hairpin winding). In other words, it is preferably provided that the winding is produced using so-called hairpin winding technology (hairpin winding technology). This allows for particularly time-saving and cost-effective production of the winding and the active component.

[0019] In another particularly advantageous embodiment of the present invention, the respective winding region comprises the aforementioned plurality of length regions of the winding that follow one another in the radial direction of the active element (also referred to as third length regions), wherein the length regions of the winding region arranged in the recess having the at least one slot are compressed in the first direction by the closing element and pressed against the slot bottom of the recess having the at least one slot. This prevents excessive distances between the third length regions. In particular, excessive differences in the distances between the third length regions can be avoided. This is because providing the smallest possible air volume in the recess (which can be achieved particularly advantageously) is particularly advantageous for achieving a particularly good thermal connection between the respective winding region and a carrier, for example, in the form of a laminated core. Consequently, the resin can be distributed particularly well in the recess and ensure a particularly good thermal connection between the winding region and the carrier.

[0020] In the present invention, the groove is designed as a semi-closed groove. This means that the slot (also called a groove slot) is narrower than the actual groove when viewed in the circumferential direction. This results in electromagnetic advantages compared to open grooves. Here, for example, the wall area is a so-called tooth crown. Typically, closure elements are not used in semi-closed grooves, as they are generally unnecessary in semi-closed grooves. However, the present invention now goes beyond this conventional approach and uses closure elements to particularly effectively compress the winding area in the groove while achieving the aforementioned advantages.

[0021] Finally, the active component is the aforementioned stator, wherein the first direction extends outwardly along the radial direction of the stator, while the second direction extends inwardly along the radial direction of the stator, thus extending toward the axis of rotation of the motor, thereby obtaining electromagnetic advantages.

[0022] It is conceivable that the closing element—particularly when viewed in its cross section extending, for example, perpendicularly to the axial direction of the active element—is designed, for example, as a wedge (also called a slot wedge) which tapers, for example, in the radial direction of the active element and particularly towards the slot base.

[0023] It is conceivable that the closure extends over the entire length of the groove extending in the axial direction of the active part. For example, exactly one closure in the form of the aforementioned closure is arranged in the groove. For example, the closure is inserted into the groove in the axial direction, i.e., in the axial direction of the active part, or the closure is inserted into the groove in the radial direction, i.e., in the radial direction of the active part and at the same time, in particular, toward the bottom of the groove. In addition, it is also conceivable that the closure does not extend over the entire length of the groove extending in the axial direction of the active part when viewed in the axial direction of the active part. A plurality of closures can be arranged in the groove, which are arranged one after another in the axial direction of the active part and in particular are spaced apart from each other. Here, the corresponding closure is, for example, arranged at a corresponding support point, at which the corresponding closure is, for example, locked together with the groove, i.e., locked into the groove.

[0024] For example, the respective winding region is embedded in the aforementioned resin in the respective groove, in particular in such a way that the respective winding region is encapsulated and / or encapsulated with the resin. It is further preferred that the respective slots of the respective groove are free of resin, thereby enabling particularly advantageous production.

[0025] A second aspect of the present invention relates to an electric machine for a motor vehicle (also referred to as a vehicle for short), wherein the electric machine includes at least one active component according to the first aspect of the present invention. This allows for particularly advantageous, and in particular, time-saving and cost-effective, production of the electric machine. The advantages and advantageous design of the first aspect of the present invention can be considered as advantages and advantageous design of the second aspect of the present invention, and vice versa. The electric machine is preferably a high-voltage component.

[0026] A third aspect of the present invention relates to a method for manufacturing an active component for an electric motor (particularly for a motor vehicle), particularly the active component according to the first aspect of the present invention. In this method, a carrier body, for example, configured as a laminated core, is provided. The carrier body has a plurality of grooves, which are (particularly completely) closed and thus defined by a corresponding groove bottom in a first direction extending in the radial direction of the active component, and are open in a second direction extending in the radial direction of the active component and opposite to the first direction. In this method, a winding region of at least one winding of the active component, which is supported by the carrier body, is arranged in the grooves of the carrier body.

[0027] To enable particularly advantageous production of the active component, the third aspect of the present invention provides that the winding region is arranged in the groove such that corresponding partial regions of the corresponding winding region arranged in the corresponding groove, which are sequentially located in the circumferential direction of the active component, overlap in a second direction with corresponding wall regions of the carrier, which are spaced apart from each other and lie opposite each other in the circumferential direction of the active component and which define corresponding slots of the corresponding groove, which are designed as through-holes and thus as through-slots. Furthermore, the third aspect of the present invention provides that a corresponding closing element, designed separately from the carrier and separate from the winding, is arranged in at least one of the slots, and in particular in a plurality of the slots or all of the slots, with which the winding region arranged in the groove having the at least one slot is pressed in a first direction and thus against the groove bottom of the groove having the at least one slot. The advantages and advantageous configurations of the first and second aspects of the present invention can be considered as those of the third aspect of the present invention, and vice versa.

[0028] In order to enable particularly time-saving and cost-effective production of the active element, one embodiment of the third aspect of the present invention provides that the winding is designed or embodied as a hairpin winding and is therefore produced using so-called hairpin winding technology, wherein the respective winding regions are inserted into respective grooves in the axial direction of the active element. The axial direction of the active element here coincides with the axis of rotation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Further details of the present invention are obtained from the following description of preferred embodiments with reference to the accompanying drawings. Figure 1 A schematic sectional view partially shows an active component designed as a stator for an electric machine, in particular for a motor vehicle. DETAILED DESCRIPTION

[0030] The only Figure 1 A schematic sectional view partially shows an active component 1 for an electric motor of a motor vehicle, also referred to as a vehicle. This means that the electric motor has the active component 1 in its fully assembled state. Furthermore, the motor vehicle has the electric motor in its fully assembled state, wherein the motor vehicle can be driven (in particular purely) electrically by the electric motor. Preferably, the electric motor is a high-voltage component. Figure 1 In the illustrated embodiment, active component 1 is a stator of an electric motor having a stator and a rotor. The rotor can be driven by the stator and can thus rotate relative to the stator about the motor's axis of rotation. The electric motor can provide a drive torque via its rotor, which can be used to drive a motor vehicle (in particular, purely electrically).

[0031] The active part 1 (stator) has a carrier 2 with a plurality of grooves. Figure 1In the figure, one of the grooves of the carrier body 2, marked 3, can be seen. The above and subsequent descriptions of the groove 3 can also be directly transferred to the other grooves of the carrier body 2, and vice versa. Figure 1 In the embodiment shown, the active element 1 is configured as the above-mentioned stator, so the grooves 3 are also called stator grooves. In particular, the carrier 2 is configured as a laminated core. The grooves of the carrier 2 are arranged one after another along the circumferential direction of the active element 1 extending around the motor rotation axis, wherein the grooves are arranged in a circle. Figure 1 The circumferential direction of the active element 1 extending around the motor rotation axis is indicated by a double arrow 4. The circumferential direction of the active element 1 indicated by the double arrow 4 extends in a plane perpendicular to the motor rotation axis and thus perpendicular to the axial direction of the active element 1. The axial direction of the active element 1 is Figure 1 It is indicated by a double arrow 5 and coincides with the motor rotation axis. It can be seen that the radial direction of the active element 1 is perpendicular to the axial direction of the active element 1 and therefore extends perpendicular to the motor rotation axis. The axial direction of the active element 1 indicated by the double arrow 5 is Figure 1 The motor axis of rotation extends perpendicular to the drawing, so that the motor axis of rotation is also perpendicular to Figure 1 The radial direction of the active element 1 is Figure 1 Indicated by the double arrow 6 , it extends perpendicularly to the motor rotation axis and perpendicularly to the axial direction of the active element 1 and extends in the above-mentioned plane, in which the circumferential direction of the active element 1 (double arrow 4 ) also extends.

[0032] The groove 3 extends in the radial direction of the active element 1 and is Figure 1 The first direction indicated by arrow 7 is blocked or closed (in particular completely) by a groove bottom 8 and is thus defined. Furthermore, the groove 3 itself, i.e., for its part, is open in a second direction, which extends in the radial direction of the active component 1 and is opposite to the first direction and is indicated by arrow 9. Thus, the groove 3 itself, i.e., for its part, opens in the second direction indicated by arrow 9 onto or into the surroundings 10 of the carrier 2 itself (i.e., for its part).

[0033] In addition, the active element 1 also has at least one winding 11. Figure 1 In the embodiment shown, the active part 1 is designed as a stator, so the winding is also called a stator winding. The winding 11 has a winding area arranged in a groove of the carrier 2, wherein Figure 1 The winding area of ​​the winding 11 which is arranged in the groove 3 and is marked with 12 can be seen in FIG. Figure 1As can be seen in FIG, the winding region 12 has a plurality of length regions 13 which are arranged one after another in the radial direction of the active part 1. The winding 11 as well as the winding region 12 and the length region 13 are formed, for example, by a wire which is made, for example, of copper and is thus configured as a copper wire. The wire is in particular an enameled copper wire which has an in particular copper wire body and a coating, the wire body being provided (in particular directly) with the coating. The wire body is made, for example, of a metallic material, such as the copper mentioned above, wherein the coating is made, for example, of a plastic. In particular, the coating is configured as a varnish. Furthermore, in Figure 1 In the embodiment shown, it is further provided that a resin 14, also referred to as an impregnation body, is formed in the groove 3. Here, the winding region 12 is embedded in the resin 14 in the groove 3 and is thus impregnated by the resin 14. In particular, the winding region 12 is encapsulated and / or encapsulated by the resin 14, for example. For example, the resin 14 is introduced into the groove 3 when the resin 14 is in a liquid state and then solidified, so that the resin 14 is configured as a solid or constitutes a solid in the finished state of the motor or active component 1, wherein the winding region 12 is (in particular at least largely or completely) embedded in the solid. Figure 1 Also visible is an insulating element 15, also referred to as a slot insulator. This insulating element 15 electrically insulates the winding region 12 in the slot 3, for example, from the carrier 2. For example, the winding region 12 in the slot 3 is surrounded on the circumference (in particular, at least partially or at least for the most part, and thus at least more than half or completely) by the insulating element 15.

[0034] To enable particularly advantageous production of the active component 1 and the electric machine as a whole, provision is made in the active component 1 for the first partial regions TB1 of the winding regions 12 arranged in the groove 3, which are arranged one after another in the circumferential direction of the active component 1, to overlap in the second direction (arrow 9) with corresponding wall regions W of the carrier 2, which are spaced apart from one another and lie opposite one another in the circumferential direction of the active component 1 (double arrow 4). The wall regions W of the carrier 2, which overlap in the second direction with the first partial regions TB1 of the winding regions 12, define corresponding slots 16 of the groove 3 in the circumferential direction of the active component 1. The corresponding wall regions W have a corresponding surface F, which can also be referred to as an end surface or configured as an end surface. It can be seen that the surfaces F of the wall regions W are spaced apart from one another, lie opposite one another, and face one another in the circumferential direction of the active component 1, with the slots 16 being defined (in particular, directly) by the surfaces F in the circumferential direction of the active component 1. The slot 16 is a through-hole, and therefore a through-slot, wherein the slot 16 forms a first length region LB1 of the groove 3. A second length region LB2 of the groove 3 adjoins the slot 16 of the groove 3, and thus (in particular, directly) on the first length region LB1, in a first direction indicated by arrow 7. The slot 16 opens (in particular, directly) into the length region LB2 in the first direction. The slot 16 opens into the surroundings 10 of the carrier 2 itself (i.e., for its part) in a second direction indicated by arrow 9. The corresponding length region 13 of the winding region 12 is also referred to as the third length region. The second length region LB2 of the groove 3 is bounded (in particular, directly) by the inner surface IF of the carrier 2 in the circumferential direction of the active component 1. The inner surfaces of the carrier 2 that bound the second length region LB2 in the circumferential direction of the active component 1 (in particular, directly) are spaced apart from each other, lie opposite, and face each other in the circumferential direction of the active component 1. In particular, the insulating element 15 is formed separately from the winding 11 and the carrier 2 and is arranged in the groove 3, in particular, in the second length region LB1. It can be seen that the winding region 12, in particular the winding 11, is arranged only in the second length region LB2 relative to the length regions LB1 and LB2 of the groove 3, so that the length region LB1, i.e., the slot 16, does not have the winding region 12, in particular, does not have the winding 11 as a whole. Since the wall regions W or the surface F are spaced apart from each other in the circumferential direction of the active component 1, the winding region 12 has a second partial region TB2 arranged between the first partial regions TB1 of the winding region 12 in the circumferential direction of the active component 1, and the second partial region overlaps with the slot 16 in the second direction (arrow 9). In addition, from Figure 1It can also be seen that the slot 16 has a first width extending in the circumferential direction of the active element 1, which is also referred to as the slot width, and is formed or defined in the circumferential direction of the active element 1 by the wall region W, in particular, by the surface F of the wall region W. The second length region LB2 of the groove 3 has a second width extending in the circumferential direction of the active element 1, which is formed or defined in the circumferential direction of the active element 1 by the inner surface IF. As can be seen, the second width is greater than the first width, so it can be said that the second length region LB2 of the groove 3 is wider than the slot 16 of the groove 3.

[0035] Furthermore, provision is made for a closure element 17, which is formed separately from the carrier 2 and the winding 11, to be arranged in the slot 16. This closure element presses the winding region 12 arranged in the groove 3 in a first direction and, as a result, presses it toward the slot bottom 8. This prevents excessive cavities in the groove 3, thereby advantageously keeping the amount of resin 14 to be introduced into the groove 3 small. Furthermore, the groove 3 ensures a favorable capillary effect, thereby preventing excess resin 14 from escaping from the groove 3 during the production of the active component 1. Furthermore, a simple and economical geometry of the groove 3 and the carrier 2, as well as a simple and economical geometry of the closure element 17, can be achieved, and the closure element 17 can be produced from low-cost materials and in a time- and cost-saving manner, thereby enabling the active component 1 to be produced in a time- and cost-saving manner.

[0036] The closure element 17 is preferably formed from a non-magnetic material (e.g., plastic). The closure element 17 engages the wall region W from behind (particularly in a first direction), thereby locking the closure element 17 to the carrier 2. In particular, the closure element 17 is thus locked to the carrier 2 and is thus held therein in a simple and economical manner. Furthermore, it is preferably provided that the winding 11 is designed as a hairpin winding, so that the winding region 12 engages, for example, in the axial direction of the active part 1 and is thus arranged in the groove 3. Furthermore, it is provided that successive length regions 13 of the winding region 12 in the radial direction of the active part 1 are compressed in the first direction by the closure element 17 and pressed against the groove bottom 8 of the groove 3, thereby avoiding an excessively large cavity in the groove 3. Furthermore, a particularly precise fit of the closure element 17 can be avoided, thereby enabling time-saving and cost-effective production and assembly of the closure element 17.

[0037] In the above-described method for producing the active component 1, it can be provided, for example, that the closing element 17 is mounted, i.e., fastened, on the carrier 2, thereby pressing the length region 13, e.g., consisting of a wire or a plurality of wires, toward the groove bottom 8. Subsequently, resin 14 is introduced into the groove 3, wherein the amount of resin 14 in the groove 3 can be kept particularly low. The resin 14 is advantageously received, and excess resin 14 can be prevented from flowing out of the groove 3 again. Alternatively, it is conceivable to first introduce a preferably small amount of resin 14 into the groove 3 and then mount the closing element 17 on the carrier 2, i.e., arrange it in the slot 16. This compresses the length region 13 toward the groove bottom 8, and the resin 14 received in the groove 3 is accordingly squeezed and fills any cavities in the groove 3.

[0038] Reference Signs List

[0039] 1 Active components

[0040] 2 Carrier

[0041] 3 grooves

[0042] 4 double arrows

[0043] 5 Double Arrow

[0044] 6 Double Arrow

[0045] 7 Arrows

[0046] 8 slot bottom

[0047] 9 arrows

[0048] 10 Surroundings

[0049] 11 Winding

[0050] 12 Winding area

[0051] 13 Length area

[0052] 14 Resin

[0053] 15 Insulation

[0054] 16 slots

[0055] 17 Closure

[0056] F side

[0057] IF inner surface

[0058] LB1 first length area

[0059] LB2 Second length area

[0060] TB1 First local area

[0061] TB2 Second local area

[0062] W wall area

Claims

1. An active component (1) for an electric motor, the active component comprising: A carrier (2) having a plurality of grooves (3), the grooves being closed by respective groove bottoms (8) along a first direction (7) extending in a radial direction (6) of the active element (1) and being open along a second direction (9) extending in a radial direction (6) of the active element (1) and opposite to the first direction (7); and at least one winding (11) supported by the carrier (2), the winding having a winding region (12) arranged in the groove (3) of the carrier (2), Its characteristics are: The corresponding partial areas (TB1) of the corresponding winding areas (12) arranged in the corresponding grooves (3) that follow one another along the circumferential direction (4) of the active part (1) overlap along the second direction (9) with the corresponding wall areas (W) of the carrier (2) that are spaced apart from each other and opposite to each other along the circumferential direction (4) of the active part (1), and the corresponding wall areas (W) of the carrier define the corresponding slots (16) of the corresponding grooves (3) along the circumferential direction (4) of the active part (1), and a closing part (17) is arranged in at least one of the slots (16) and is formed separately from the carrier (2) and the winding (11), by means of which the winding area (12) arranged in the groove (3) having the at least one slot (16) is pressed along the first direction (7) and thus pressed against the groove bottom (8) of the groove (3) having the at least one slot (16).

2. The active component (1) according to claim 1, characterized in that: The closing member (17) is made of non-magnetic material.

3. The active component (1) according to claim 1 or 2, characterized in that: The closure member (17) is made of plastic.

4. Active component (1) according to any one of the preceding claims, characterized in that: The closing part (17) engages from behind a wall region (W) that delimits the at least one slot (16), so that the closing part (17) is held on the carrier (2).

5. Active component (1) according to any one of the preceding claims, characterized in that: The winding (11) is configured as a hairpin winding.

6. Active component (1) according to any one of the preceding claims, characterized in that: The corresponding winding region (12) has a plurality of length regions (13) of the winding (11) that are arranged one after another in a radial direction (6) of the active part (1), wherein the length region (13) of the winding region (12) arranged in the groove (3) having the at least one slot (16) is compressed along the first direction (7) by a closing member (17) and pressed against the groove bottom (8) of the groove (3) having the at least one slot (16).

7. Active component (1) according to any one of the preceding claims, characterized in that: The active component (1) is a stator, the first direction (7) extends outward along a radial direction (6) of the stator, and the second direction (9) extends inward along the radial direction (6) of the stator.

8. An electric machine for a motor vehicle, comprising at least one active component (1) according to any one of the preceding claims.

9. A method for producing an active component (1) for an electric machine, wherein: - providing a carrier (2) having a plurality of grooves (3), which are closed by corresponding groove bottoms (8) along a first direction (7) extending in a radial direction (6) of the active element (1) and are open along a second direction (9) extending in a radial direction (6) of the active element (1) and opposite to the first direction (7); and - arranging a winding region (12) of at least one winding (11) of an active component (1) supported by a carrier (2) in a recess (3) of the carrier (2); Its characteristics are: - arranging the winding regions (12) in the grooves (3) such that corresponding partial regions (TB1) of the corresponding winding regions (12) arranged in the corresponding grooves (3) successively following one another in the circumferential direction (4) of the active element (1) overlap in the second direction (9) corresponding wall regions (W) of the carrier (2) spaced apart from one another and lying opposite one another in the circumferential direction (4) of the active element (1), the corresponding wall regions (W) of the carrier defining corresponding slots (16) of the corresponding grooves (3) in the circumferential direction (4) of the active element (1); and - a closing part (17) is arranged in at least one of the slots (16), which is designed separately from the carrier (2) and the winding (11), with which the winding region (12) arranged in the groove (3) having the at least one slot (16) is pressed in a first direction (7) and thus against the groove bottom (8) of the groove (3) having the at least one slot (16).

10. The method according to claim 9, characterized in that: The winding (11) is configured as a hairpin winding, wherein the corresponding winding region (12) is inserted into the corresponding groove (3) along the axial direction (5) of the active component (1).

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