Arrangement of a winding on a laminated core for an electric machine, method for producing a stator or a rotor for an electric machine, stator for an electric machine, rotor for an electric machine, and electric machine

Abstract

The invention relates to an arrangement (2) of at least one winding (3) on a laminated core (4) for an electric machine, wherein the laminated core (4) has at least one slot (5) in which longitudinal regions (L) of the winding (3) held on the laminated core (4) are received. A plastic (K) is arranged in the slot (5) between at least one of the longitudinal regions (L) arranged in the slot (5) and the laminated core (4). The plastic (K) and the at least one longitudinal region (L) delimit a temperature-control channel (13) which is arranged between the plastic (K) and the at least one longitudinal region (L) and through which a temperature-control medium for controlling the temperature of the laminated core (4) and / or of the at least one longitudinal region (L) can flow.

Description

[0001] Arrangement of a winding on a laminated core for an electrical machine, method for producing a stator or a rotor for an electrical machine, stator for an electrical machine, rotor for an electrical machine and electrical machine

[0002] The invention relates to an arrangement of at least one winding on a laminated core for an electrical machine, in particular of a motor vehicle, according to the preamble of patent claim 1. Furthermore, the invention relates to a method for producing a stator or a rotor for an electrical machine, in particular of a motor vehicle, according to the preamble of patent claim 7. The invention also relates to a stator for an electrical machine, in particular of a motor vehicle. The invention also relates to a rotor for an electrical machine, in particular of a motor vehicle. Furthermore, the invention relates to an electrical machine for a motor vehicle.

[0003] An electric motor is known from EP 2 474 083 B1.

[0004] DE 10 2014 213 595 A1 discloses a device for producing a stator of an electrical machine from stator segments. A stator for an electrical machine is known from DE 10 2018 203 939 A1. DE 10 2019 112 389 B4 discloses a stator for an electrical machine. Furthermore, CH 343509 A discloses a stator winding.

[0005] The object of the present invention is to provide an arrangement of at least one winding on a laminated core for an electrical machine, a method for producing a stator or a rotor for an electrical machine, a stator for an electrical machine, a rotor for an electrical machine and an electrical machine for a motor vehicle, so that a particularly advantageous temperature control of the electrical machine can be realized.

[0006] This object is achieved according to the invention by an arrangement having the features of patent claim 1, by a method having the features of patent claim 7, by a stator having the features of patent claim 13, by a rotor having the features of patent claim 14, and by an electrical machine having the features of patent claim 15. Advantages Embodiments of the invention are the subject of the dependent claims.

[0007] A first aspect of the invention relates to an arrangement of at least one winding on a laminated core for an electrical machine, in particular of a motor vehicle. This means that the electrical machine, in its fully manufactured state, has the aforementioned arrangement and thus the winding and the laminated core, wherein the winding is formed separately from the laminated core. In particular, the winding is formed from a metallic material such as copper. The laminated core is formed from a metallic material. In particular, it is conceivable for the winding to be formed from a first metallic material and the laminated core to be formed from a second metallic material different from the first metallic material.The electrical machine is preferably a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. In the arrangement, the laminated core has at least one slot. The at least one slot is also referred to as the first slot. When reference is made previously and hereinafter to the slot or to the at least one slot, this refers to the first slot unless otherwise stated. Length sections of the winding are received and thus arranged in the slot. In the arrangement, the winding is held on the laminated core and thus supported by the laminated core.For example, the laminated core has a plurality of grooves, namely the aforementioned first groove and at least one or more further grooves, wherein the grooves of the laminated core are arranged successively, for example in the circumferential direction of the laminated core, and in particular are spaced apart from one another.

[0008] In its fully manufactured state, the electric machine has a stator or a rotor, which can be driven by the stator and is therefore rotatable about a machine axis of rotation relative to the stator. The circumferential direction of the laminated core runs around the machine axis of rotation. The laminated core, whose axial direction coincides with the machine axis of rotation, can be used either as a laminated core of the stator or as a laminated core of the rotor. The laminated core, whose radial direction runs perpendicular to the axial direction of the laminated core and thus perpendicular to the machine axis of rotation, is composed, for example, of several separately formed laminated core segments, also referred to as individual laminates. For example, in its fully manufactured state, the electric machine can provide drive torques via the rotor for driving the motor vehicle, in particular purely electrically.The winding is also referred to as the first winding. When reference is made to the winding above and below, this refers to the first winding unless otherwise stated. For example, additional lengths of the first winding and / or lengths of a second winding are arranged and thus accommodated in the respective "further winding."

[0009] In order to be able to particularly advantageously control the temperature of the laminated core and / or the winding and thus the electrical machine, i.e. to cool and / or heat them, a plastic is arranged in the groove between at least one of the longitudinal regions arranged in the groove and the laminated core. This means in particular that an element made of the plastic, which is preferably designed as a solid body, is arranged in the groove between the at least one longitudinal region and the laminated core. The plastic, i.e., the element and the at least one longitudinal region, defines a temperature control channel arranged between the plastic and the at least one longitudinal region, through which a preferably liquid temperature control medium can flow for temperature control, i.e., for cooling and / or heating the laminated core and / or the at least one longitudinal region. The temperature control medium is preferably a component of the arrangement.In principle, it would be conceivable for the temperature control medium to be a gas. However, the temperature control medium is very preferably a liquid. The temperature control medium is, for example, an oil. Furthermore, it is conceivable for the temperature control medium to comprise at least water. On its path through the temperature control channel, heat can be exchanged between the temperature control medium and the at least one longitudinal region and / or between the temperature control medium and the laminated core, as a result of which the temperature of the at least one longitudinal region and / or the laminated core can be controlled, i.e. cooled and / or heated. In order to cool the at least one longitudinal region and / or the laminated core, for example, the temperature control medium has a lower temperature on its path through the temperature control channel than the at least one longitudinal region or the laminated core, such that heat can be transferred from the at least one longitudinal region or the laminated core to the temperature control medium.For example, to heat the at least one longitudinal region and / or the laminated core, the temperature control medium has a higher temperature on its path through the temperature control channel than the at least one longitudinal region and / or the laminated core, whereby heat can be transferred from the temperature control medium to the at least one longitudinal region or the laminated core. Thus, it is particularly provided that, in a method for operating the electric machine, the temperature control medium flows through the temperature control channel, particularly in one flow direction.

[0010] Preferably, the temperature control channel runs perpendicular to a plane that runs perpendicular to the axial direction of the laminated core. The axial direction of the laminated core coincides with the machine's axis of rotation. In particular, it is conceivable for the temperature control channel to run in the axial direction of the laminated core and thus in the axial direction of the electric machine, thus running parallel to the axial direction of the laminated core, so that, for example, the temperature control channel runs perpendicular to the aforementioned plane.

[0011] The invention enables particularly advantageous temperature control of the electrical machine to be achieved, so that a particularly high level of performance of the electrical machine can be achieved. In particular, excessively high temperatures of the electrical machine as well as excessively low temperatures of the electrical machine can be avoided during operation of the electrical machine. The background to the invention is in particular that the longitudinal regions of the winding are conductors subject to high thermal stress and designed to conduct electrical energy or electrical current, which can now be temperature-controlled, in particular cooled, particularly effectively and efficiently by the invention. The at least one longitudinal region and the plastic are used to delimit the temperature-control channel, in particular directly in each case.The temperature control channel is thus a flow space arranged very close to the at least one length region and thus close to the conductor, through which the temperature control medium can flow or flows during the said operation of the electrical machine.

[0012] The respective length range comprises, for example, a conductor formed from the metallic material, in particular from the first metallic material from which the winding is formed, and, for example, a sheath which is formed, for example, from a material that is different from the metallic material from which the winding and thus the conductor are formed. The conductor is, in particular, completely surrounded by or by the sheath along its circumferential direction and is thus sheathed by or by the sheath. In this case, it is particularly conceivable for the temperature control channel to be delimited directly by the sheath on the one hand and directly by the plastic on the other, so that the temperature control medium, on its way through the temperature control channel, directly contacts the sheath or the at least one length range on the one hand and directly contacts the plastic on the other.This allows for particularly advantageous temperature control. Since the at least one length region and the plastic are used to define the temperature control channel, additional components for forming the temperature control channel can be avoided, allowing effective and efficient temperature control to be realized in a particularly simple, weight-, cost-, and space-saving manner.

[0013] In order to be able to realize a particularly advantageous temperature control in a particularly advantageous manner, it is provided in one embodiment of the invention that the plastic is injected into the groove and is thereby injected, in particular directly, against the laminated core.

[0014] A further embodiment is characterized in that the plastic forms a body that is separate from the laminated core and separate from the longitudinal sections arranged in the groove. This body is particularly designed as a solid body and is, for example, the aforementioned element. This allows, for example, the laminated core or the groove to be provided with the plastic particularly easily and thus in a time- and cost-effective manner, thus enabling advantageous temperature control of the electrical machine in a particularly advantageous manner.

[0015] In a further embodiment of the invention, the longitudinal regions are arranged successively in the groove along a particularly straight arrangement direction. The arrangement direction runs, for example, in the aforementioned plane. In particular, it is conceivable that the arrangement direction runs in the radial direction of the laminated core and thus perpendicular to the axial direction of the laminated core.

[0016] It has proven particularly advantageous if the temperature control channel is arranged along the arrangement direction between the at least one length region, which is also referred to as the first length region, and a second length region of the length regions arranged in the groove, which length region immediately follows the at least one length region along the arrangement direction. The feature that the second length region immediately follows the first length region along the arrangement direction, i.e. directly follows the first length region, is to be understood as meaning that the first length region and the second length region are adjacent to one another along the arrangement direction, so that, viewed along the arrangement direction, no other, further length region of the winding or of another winding is arranged between the first length region and the second length region.It is provided that the temperature control channel is defined by the plastic, by the first length range, and by the second length range, in particular directly in each case. This ensures particularly advantageous temperature control. The previous and following statements regarding the first length range, i.e., the at least one length range, can readily be applied to the second length range, and vice versa.

[0017] Another embodiment is characterized by the fact that the plastic is electrically insulating. Thus, the plastic or the body is a non-conductor, also known as an insulator, whose electrical conductivity is less than 10' 8 S*cm -1The plastic therefore has a dual function. On the one hand, the plastic is used to delimit the temperature control channel, in particular directly. On the other hand, the plastic is used as slot insulation in order to achieve advantageous electrical insulation. This allows particularly advantageous temperature control of the electrical machine to be achieved in a particularly lightweight, space-saving and cost-effective manner. In particular, the plastic acting as slot insulation can be used to achieve electrical insulation between the longitudinal sections arranged in the slot and the laminated core, so that additional, separate components for implementing such slot insulation can be avoided.

[0018] A second aspect of the invention relates to a method for producing a stator or a rotor for an electrical machine. In the following, the stator and the rotor are collectively referred to as machine parts, so that when reference is made to the machine part below, this refers to the rotor and the stator, unless otherwise stated.

[0019] In the method according to the invention, a laminated core of the machine part is provided, wherein the laminated core has at least one groove. In the method, longitudinal sections of a winding, which is formed separately from the laminated core and is fastened to the laminated core, are arranged in the groove.

[0020] In order to be able to realize particularly advantageous temperature control of the machine part and thus of the electrical machine, the second aspect of the invention provides that a plastic is arranged in the groove in such a way that the plastic is arranged between at least one of the longitudinal regions arranged in the groove and the laminated core. This is to be understood in particular that, in the fully manufactured state of the machine part, the plastic is arranged between at least one of the longitudinal regions arranged in the groove and the laminated core. In principle, it would be conceivable to arrange the at least one longitudinal region in the groove while the plastic is not yet arranged in the groove, whereupon the plastic is then arranged in the groove in order to thereby arrange the plastic between the at least one longitudinal region and the laminated core.Furthermore, it is conceivable and particularly advantageous to arrange the plastic in the groove while the at least one longitudinal region, in particular the longitudinal regions, is / are not yet arranged in the groove, whereupon the at least one longitudinal region, in particular the longitudinal regions, is / are arranged in the groove, whereby the plastic is arranged between the at least one longitudinal region and the laminated core. Thus, the steps of the method are not necessarily performed in the order in which they are mentioned.

[0021] In the method according to the second aspect of the invention, it is further provided that a temperature control channel arranged between the plastic and the at least one longitudinal region is delimited and thus formed by the plastic and the at least one longitudinal region, through which a temperature control medium can flow for temperature control, i.e., for cooling and / or heating the laminated core and / or the at least one longitudinal region. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

[0022] In order to be able to realize particularly advantageous temperature control of the machine part and thus of the electrical machine in a particularly simple and thus time- and cost-effective manner, one embodiment of the second aspect of the invention provides for the plastic to be injected into the groove. Thus, for example, an injection molding process, in particular a plastic injection molding process, is carried out, wherein during or by the injection molding process the plastic, in particular in the liquid state of the plastic, is injected into the groove and is thereby sprayed, in particular directly, against the laminated core. The plastic then hardens, for example, so that the plastic forms a body embodied as a solid and formed from the plastic.For example, the length regions and thus the at least one length region are then arranged in the groove in order to thereby arrange the plastic or the body between the at least one length region and the laminated core. In order to be able to produce the machine part particularly advantageously, in particular particularly time- and cost-effectively, and thus to realize particularly advantageous temperature control of the machine part in a particularly time- and cost-effective manner, it is provided in a further embodiment of the second aspect of the invention that in the method a plastic body is provided which is formed separately from the winding and separately from the laminated core and is produced independently of the laminated core and independently of the winding and formed from the plastic.The plastic body and thus the plastic are moved, in particular when the plastic body and thus the plastic are in the solid state, relative to the laminated core and thereby moved into the groove, whereby the plastic body and thus the plastic are arranged in the groove, in particular when the plastic body and thus the plastic are in the solid state. In particular, it is provided that the plastic body and thus the plastic are arranged in the groove, while the at least one longitudinal region, in particular the longitudinal regions, is or are still arranged, in particular completely, outside the groove, and therefore is or are not yet arranged in the groove, whereupon the at least one longitudinal region, in particular the longitudinal regions, of the winding are arranged in the groove, in particular in order to thereby arrange the plastic between the at least one longitudinal region and the laminated core.This makes it possible to produce the plastic body and the laminated core at the same time, so that the machine part can be manufactured particularly cost-effectively.

[0023] In a further, particularly advantageous embodiment of the invention, it is provided that after the plastic body, which is, for example, the aforementioned body, has been arranged in the groove, the plastic body is deformed while the plastic body is arranged in the groove and, in particular, while the plastic body is solid. As a result, for example, the plastic body can be particularly advantageously snugly conformed to the laminated core, in particular over a particularly large area, so that particularly advantageous temperature control can be achieved in a particularly simple manner. In particular, an advantageous heat exchange between the temperature control medium flowing through the temperature control channel and the laminated core can thus be ensured, for example, via the plastic body.

[0024] For example, the plastic body is deformed while it is arranged in the groove in such a way that the plastic body is subjected to pressure, in particular directly, whereby the plastic body is deformed. For this purpose, for example, a fluid which causes the pressure, i.e. exerts the pressure at least indirectly, in particular directly, on the plastic body and which is in the form of a gas, for example, is introduced into the groove, whereby the plastic body arranged in the groove is subjected to the fluid, in particular directly. Thus, for example, an internal high-pressure forming process (IHU process) is carried out, also referred to as internal high-pressure forming or IHU, by means of which the plastic body arranged in the groove is deformed. In the IHU process, the fluid is introduced into the groove, whereby the plastic body is at least indirectly, in particular directly, subjected to the fluid and thus deformed.This allows for particularly advantageous temperature control to be achieved in a particularly advantageous manner. In particular, according to the hydroforming process, the at least one longitudinal region, in particular the longitudinal regions, are arranged in the groove.

[0025] In order to achieve particularly advantageous temperature control of the machine part, a further embodiment of the invention provides that, by forming the plastic body, partial regions of the plastic body that are initially spaced from the wall regions of the laminated core, in particular those directly bordering the groove, are brought into, in particular direct, support contact with the wall regions. As a result, the plastic body conforms particularly advantageously, in particular over a particularly large area, to the wall regions and thus to the laminated core, thus ensuring a particularly advantageous, effective, and efficient heat exchange between the temperature control medium and the laminated core.

[0026] A further embodiment of the second aspect of the invention is characterized in that, by forming the plastic body, at least one cavity is produced in the plastic body, the cavity of which defines the temperature control channel, in particular directly. In particular, the cavity is convex and thus curved away from the at least one longitudinal region. This allows the temperature control channel to be manufactured simply and as needed, thus enabling efficient temperature control.

[0027] A third aspect of the invention relates to a stator for an electrical machine, wherein the stator has an arrangement according to the first aspect of the invention. Advantages and advantageous embodiments of the first aspect and of the second aspect of the invention are to be regarded as advantages and advantageous embodiments of the third aspect of the invention, and vice versa. Thus, in the third aspect of the invention, the laminated core is a laminated core of the stator, and the winding is a winding of the stator, also referred to as a stator winding. A fourth aspect of the invention relates to a rotor for an electrical machine, wherein the rotor has an arrangement according to the first aspect of the invention. Advantages and advantageous embodiments of the first aspect of the invention, the second aspect of the invention, and the third aspect of the invention are to be regarded as advantages and advantageous embodiments of the fourth aspect of the invention, and vice versa.Thus, in the fourth aspect of the invention, the laminated core is on the laminated core of the rotor, and the winding is a winding of the rotor, also referred to as a rotor winding.

[0028] A fifth aspect of the invention relates to an electric machine for a motor vehicle, wherein the electric machine according to the fifth aspect of the invention has a stator according to the third aspect of the invention and / or a rotor according to the fourth aspect of the invention. Advantages and advantageous embodiments of the first, second, third, and fourth aspects of the invention are to be regarded as advantages and advantageous embodiments of the fifth aspect of the invention, and vice versa.

[0029] Further details of the invention will become apparent from the following description of preferred embodiments with the accompanying drawings. In the drawings:

[0030] Fig. 1 shows a partial schematic and sectional front view of a first embodiment of an arrangement of at least one winding on a laminated core for an electrical machine;

[0031] Fig. 2 shows a partial schematic and sectional front view of a second embodiment of the arrangement;

[0032] Fig. 3 shows a partial schematic and sectional front view of a third embodiment of the arrangement;

[0033] Fig. 4 shows a partial schematic and sectional front view of a fourth embodiment of the arrangement;

[0034] Fig. 5 is a schematic perspective view of a plastic body used in a first embodiment of a method for manufacturing the assembly; and Fig. 6 is a schematic representation of the first embodiment of the

[0035] procedure.

[0036] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0037] Fig. 1 shows a detail in a schematic and sectional front view of a machine part 1 for an electrical machine, in particular of a motor vehicle. The machine part 1 is a rotor or a stator of the electrical machine, so that the previous and following statements about the machine part 1 can be applied to both the rotor and the stator of the electrical machine. Fig. 1 shows a first embodiment of the machine part 1. In its fully manufactured state, the electrical machine has the stator and the rotor, which can be driven by means of the stator and is therefore rotatable about a machine axis of rotation relative to the stator. Via its rotor, the electrical machine can provide drive torques by means of which the motor vehicle can be driven, in particular purely electrically. The machine part 1 has an arrangement 2 of at least one winding 3 on a laminated core 4. Thus, Fig.1 shows a detail of the arrangement 2 in a schematic and sectional front view. It can be seen that the machine part 1 has the laminated core 4 and the winding 3 and the arrangement 2. The winding 3 is formed separately from the laminated core 4. The laminated core 4 has a plurality of slots 5 which are spaced apart from one another and arranged successively in the circumferential direction of the laminated core 4. The circumferential direction of the laminated core 4, the axial direction of which coincides with the machine axis of rotation, is illustrated by a double arrow 6 and runs around the machine axis of rotation and thus around the axial direction of the laminated core 4, the radial direction of which runs perpendicular to the axial direction of the laminated core 4. The axial direction of the laminated core 4 and thus of the electrical machine and the machine part 1 is illustrated by a double arrow 7, which runs perpendicular to the image plane of Fig. 1.The radial direction of the laminated core 4 and thus of the electrical machine and the machine part 1 is illustrated by a double arrow 8. The respective slot 5 is delimited on both sides by the laminated core 4, in particular directly, in the circumferential direction of the machine part 1 and thus of the laminated core 4. In the radial direction inwards of the machine part 1 and of the laminated core 4, the respective slot 5 is open on its own. In the radial direction outwards of the laminated core 4, the respective slot is delimited on its own, in particular directly, by the laminated core 4. It can be seen that a respective closure element 9, also referred to as a cover slide or designed as a cover slide, is arranged in the respective slot and is designed separately from the winding 3 and separately from the laminated core 4.The respective closure element 9 closes the respective groove 5 in the radial direction of the laminated core 4 inwards, in particular completely.

[0038] It can be seen from Fig. 1 that longitudinal regions L of the winding 3 are accommodated and thus arranged in at least one of the slots 5. The respective longitudinal region L has a respective electrically conductive conductor 10 for conducting and transmitting electrical energy or electrical current. The respective conductor 10 is formed from a material, in particular a metallic material, such as copper. For example, the conductors 10 of the longitudinal regions L of the winding 3 accommodated in the at least one slot 5 can be formed integrally with one another, i.e., formed from a single piece.Furthermore, the respective length range L has a respective sheath 11, wherein the respective conductor 10 of the respective length range L is surrounded in the circumferential direction of the respective conductor 10, in particular completely circumferentially by or from the sheath 11 and is thus sheathed, in particular such that the respective sheath 11 directly touches the respective, associated conductor 10. For example, the respective sheath 11 is formed from a varnish, in particular from an electrically insulating varnish, so that, for example, the sheath 11 is a non-conductor. In the context of the present disclosure, a non-conductor is understood to mean a non-conductor whose electrical conductivity is less than 10. -8 S*cm -1The material from which the respective conductor 10 is formed is also referred to as the first material. For example, the laminated core 4 is formed from a second material that is different from the first material and is, for example, a metallic material.

[0039] In order to be able to implement particularly advantageous temperature control, i.e. heating and / or cooling of the machine part 1 and thus of the electrical machine comprising the machine part 1, a plastic K is accommodated in the respective groove 5 between the respective longitudinal regions L arranged in the respective groove 5 and the laminated core 4. In the first embodiment shown in Fig. 1, a respective body 12 formed from the plastic K is arranged in the respective groove 5 between the respective regions L arranged in the respective groove 5 and the laminated core 4. In the present case, the bodies 12 are formed separately from one another. Since the respective body 12 is formed from the plastic, the respective body 12 is a respective plastic body.A temperature control channel 13 arranged between the plastic K and the at least one length range L is delimited, in particular directly, by the plastic K and by at least one of the length ranges L arranged in the respective groove 5, and a preferably liquid temperature control medium can flow through said channel 13 for controlling the temperature of the laminated core 4 and / or the at least one length range L. It can be seen that the respective temperature control channel 13 is delimited, on the one hand, in particular directly, by the plastic K and, on the other hand, in particular directly, by the respective casing 11 of the respective length range L, so that the temperature control medium directly contacts the plastic K and the respective casing 11 on its way through the temperature control channel 13.

[0040] It can be seen particularly well from Fig. 1 that the respective longitudinal regions L arranged in the respective groove 5 are arranged successively along an arrangement direction. The arrangement direction is illustrated by a double arrow 15 and, in the first embodiment, runs in the radial direction of the machine part 1 and thus of the laminated core 4. In the first embodiment, viewed along the arrangement direction, at least or exactly one tempering channel 13 or at least exactly two tempering channels 13 are arranged between each two longitudinal regions L which are directly and thus directly consecutive and thus adjacent to one another along the arrangement direction, whereby effective and efficient tempering can be achieved.The respective temperature control channel 13 is thus delimited, on the one hand, in particular directly, by the plastic K and, on the other hand, in particular directly, by the adjacent longitudinal regions L, in particular by their casings 11. This allows for effective and efficient temperature control. In the first embodiment, at least one temperature control channel 13 is arranged along the arrangement direction and, viewed in pairs, between each longitudinal region L adjacent to one another along the arrangement direction.

[0041] Fig. 2 shows a detail in a schematic and sectional front view of a second embodiment of the machine part 1 and thus of the arrangement 2. In the second embodiment, viewed along the arrangement direction, at least or exactly one tempering channel 13, in particular at least or exactly two tempering channels 13, is arranged only between every second longitudinal region L adjacent to one another along the arrangement direction.

[0042] Fig. 3 shows a third embodiment of the machine part 1 and thus of the arrangement 2. The respective length ranges L of the winding 3 accommodated in the respective slot 5 form a length range group in which, as explained above, the length ranges L are arranged successively along the arrangement direction (double arrow 15). The respective length range group has a first side S1 and a second side S2, wherein the sides S1 and S2 of the respective length range group point away from one another in the circumferential direction of the machine part 1 and thus of the laminated core 4, and are therefore facing away from one another. In the first, second and third embodiments, respective temperature control channels 13 are arranged on both the respective first side S1 and the respective second side S2, wherein the temperature control channels 13 arranged on the respective side S1, S2 follow one another along the arrangement direction.The temperature control channels 13 arranged on the respective side S1 form a first temperature control channel group, and the temperature control channels 13 arranged on the respective side S2 form a second temperature control channel group. In the first and second embodiments, the first temperature control channel group and the second temperature control channel group are arranged at the same height along the arrangement direction, thus not offset from one another.

[0043] In the third embodiment shown in Fig. 3, the first tempering channel group is arranged offset along the arrangement direction to the second tempering channel group, so that, viewed in pairs, only, i.e. exactly one, tempering channel 13 is arranged between each two length regions L which are immediately consecutive along the arrangement direction and thus adjacent to one another.

[0044] In the first, second and third embodiments, the respective tempering channel 13 is delimited, in particular directly, by a respective partial region T of the plastic K which is convex and thus curved away from the at least one length region L.

[0045] Fig. 4 shows a partial schematic and sectional front view of a fourth embodiment of the machine part 1 and thus of the arrangement 2. In the fourth embodiment, the respective partial area T of the plastic K is angular.

[0046] Fig. 5 shows a schematic perspective view of the aforementioned plastic body designated 14, which is formed, i.e. manufactured, from the plastic K. With reference to Fig. 5, a first embodiment for producing the machine part 1 and thus the arrangement 2 is explained, wherein the method according to the first embodiment can be used, for example, to produce the arrangement 2 according to the first, second, third and fourth embodiments from machine part 1. In the method for producing the machine part 1 and thus the arrangement 2, the laminated core 4 is provided, which has the respective slot 5. Furthermore, in the method, the respective length regions L are arranged in the respective slot 5, wherein the winding 3 is fastened to the laminated core 4. This is done, for example, in such a way that the winding 3 is wound around the laminated core 4.

[0047] In the first embodiment of the method, the plastic body 14 is provided, which is formed separately from the winding 3 and separately from the laminated core 4 and is manufactured independently of the laminated core 4 and independently of the winding 3 and formed from the plastic K. The method according to the first embodiment is illustrated schematically in Fig. 6. For example, the plastic body 14 is provided in a first step of the method. In a second step SR2 of the method, the plastic body 14 is arranged in the respective groove, whereby the plastic K is arranged in the respective groove 5.

[0048] In a third step SR3 of the method, which follows in particular the second step SR2 and thus after the plastic body 14 has been arranged in the respective groove 5, a forming process is carried out by means of which the plastic body 14 is formed while it is arranged in the respective groove 5. In the first embodiment of the method shown in Fig. 5 and 6, the forming process is or comprises, for example, an internal high-pressure forming process in which a fluid, for example gaseous, i.e. in the form of a gas, is introduced into the respective groove 5 while the plastic body 14 is arranged in the respective groove 5, as a result of which the plastic body 14 arranged in the respective groove 5 is at least indirectly, in particular directly, exposed to the fluid, in particular on a side of the plastic body 14 facing away from the laminated core. As a result, as shown in Fig.6 is illustrated by arrows in the third step SR3, a pressure caused by the fluid is exerted at least indirectly, in particular directly, on the plastic body 14 arranged in the respective groove 5, whereby the plastic body 14 is deformed.

[0049] From Fig. 6 it can be seen that initially and for example in the second step SR2, respective partial regions TB of the plastic body 14 are spaced from wall regions W of the laminated core 4 which delimit the respective groove 5, in particular directly, wherein the partial regions TB are arranged in the respective groove 5. As a result of the forming of the plastic body 14 in the respective groove 5 which takes place in the third step SR3, the partial regions TB of the plastic body 14 which are initially spaced from the wall regions W and arranged in the respective groove 5 are brought into, in particular direct, support contact with the wall regions W of the laminated core 4, so that as a result of the forming of the plastic body 14, its partial regions TB directly touch the wall regions W.As a result, the plastic body 14 in the respective groove 5 nestles particularly advantageously, in particular over a particularly large area, against the laminated core 4, so that an advantageous, effective and efficient heat exchange can take place between the laminated core and the temperature control medium flowing through the temperature control channel 13 via the plastic K.

[0050] In a fourth step SR4 of the method, which particularly follows the third step SR3 in terms of time, the respective length ranges L are arranged in the respective groove 5, whereby the plastic K is arranged between the laminated core 4 and the respective length range L in the respective groove 5. As a result, as illustrated in Fig. 6 by an area B shown enlarged in Fig. 6, the respective temperature control channel 13 is delimited on the one hand, in particular directly, by the plastic K and on the other hand, in particular directly, by the respective length range L.

[0051] In a second embodiment of the method, not illustrated in the figures, a plastic injection molding process is carried out, for example, in which the plastic K, in particular in the liquid state of the plastic K, is injected into the respective groove 5. As a result, for example, the plastic K, in particular in the liquid state of the plastic K, is injected, in particular directly, against the laminated core 4. Subsequently, the initially liquid plastic K, for example, hardens, whereby the plastic K, in particular in the finished state of the machine part 1, forms a solid body made of the plastic K, also simply referred to as a body. In particular, the respective length ranges L of the respective groove are then arranged in order to thereby arrange the plastic K between the respective length range L and the laminated core 4. List of reference symbols

[0052] 1 Machine part 2 Arrangement 3 Winding 4 Laminated core 5 Slot 6 Double arrow 7 Double arrow 8 Double arrow 9 Closure element 10 Conductor 11 Sheath 12 Body

[0053] 13 Temperature control channel 14 Plastic body B Area K Plastic L Length areas S1 Side S2 Side SR2 Second step SR3 Third step SR4 Fourth step T Partial area TB Partial area W Wall area

Claims

Patent claims 1. Arrangement (2) of at least one winding (3) on a laminated core (4) for an electrical machine, in which the laminated core (4) has at least one groove (5) in which longitudinal regions (L) of the winding (3) held on the laminated core (4) are accommodated, characterized in that: - a plastic (K) is arranged in the groove (5) between at least one of the length regions (L) arranged in the groove (5) and the laminated core (4); and - a tempering channel (13) arranged between the plastic (K) and the at least one length region (L) is delimited by the plastic (K) and the at least one length region (L), through which a tempering medium can flow for tempering the laminated core (4) and / or the at least one length region (L).

2. Arrangement (2) according to claim 1, characterized in that the plastic (K) is injected into the groove (5) and thereby injected against the laminated core (4).

3. Arrangement (2) according to claim 1 or 2, characterized in that the plastic (K) forms a body (14) which is formed separately from the laminated core (4) and separately from the longitudinal regions (L).

4. Arrangement (2) according to one of the preceding claims, characterized in that the length regions (L) are arranged successively in the groove (5) along an arrangement direction (15).

5. Arrangement (2) according to claim 4, characterized in that the tempering channel (13) is arranged along the arrangement direction (15) between the at least one length region (L) as the first length region (L) and a second of the length regions (L) arranged in the groove (5) immediately following the at least one length region (L) along the arrangement direction (15), wherein the tempering channel (13) is delimited by the plastic (K), by the first length region (L) and by the second length region (L).

6. Arrangement (2) according to one of the preceding claims, characterized in that the plastic (K) is electrically insulating.

7. A method for producing a stator or a rotor for an electrical machine, in which: - a laminated core (4) of the stator or rotor is provided, wherein the laminated core (4) has at least one groove (5); and - longitudinal sections (L) of a winding (3) are arranged in the groove (5), which winding is fastened to the laminated core (4); characterized in that: - a plastic (K) is arranged in the groove (4) in such a way that the plastic (K) is arranged between at least one of the length regions (L) arranged in the groove (5) and the laminated core (4); and - a tempering channel (13) arranged in the groove (5) between the plastic (K) and the at least one length region (L) is delimited by the plastic (K) and the at least one length region (L), through which a tempering medium for tempering the laminated core (4) and / or the at least one length region (L) can flow.

8. Method according to claim 7, characterized in that the plastic (K) is injected into the groove (5).

9. Method according to claim 7, characterized in that a separate from the winding (3) and separately from the laminated core (4) and independently of the laminated core (4) and independently of the winding (3) manufactured and formed from the plastic (K) plastic body (14) and thereby the plastic (K) is arranged in the groove (5).

10. The method according to claim 9, characterized in that after arranging the plastic body (14) in the groove (5), the plastic body (14) is deformed while the plastic body (14) is arranged in the groove (5).

11. Method according to claim 10, characterized in that by forming the plastic body (14), partial regions (TB) of the plastic body (14) which are initially spaced apart from the wall regions (W) of the laminated core (4) delimiting the groove (5) are brought into support with the wall regions (W).

12. The method according to claim 10 or 11, characterized in that by forming the plastic body (14) at least one cavity of the plastic body (14) is produced, which delimits the tempering channel (13).

13. Stator for an electrical machine, comprising an arrangement (2) according to one of claims 1 to 6.

14. Rotor for an electrical machine, with an arrangement (2) according to one of claims 1 to 6.

15. An electric machine for a motor vehicle, comprising a stator according to claim 13 and / or a rotor according to claim 14.

Images