Laminated core for an electric machine, in particular of a motor vehicle, electric machine, and motor vehicle

Abstract

The invention relates to a laminated core (1) for an electric machine, comprising at least three laminated core parts (2, 3, 4, 5) arranged in succession in the axial direction (9), specifically a first laminated core part (2) which has at least two first temperature-control channels (16, 17) through which a temperature-control medium for controlling the temperature of the laminated core (1) can flow, and a second laminated core part (3) which axially adjoins a first axial end face (A1) of the first laminated core part (2) and has at least one second temperature-control channel (19) which is fluidically connected at least to the two first temperature-control channels (16, 17) and through which the temperature-control medium at least from the two first temperature-control channels (16, 17) can thus flow and which has a first flow cross section through which the temperature-control medium can flow.

Description

[0001] Laminated core for an electrical machine, in particular of a motor vehicle, electrical machine and motor vehicle

[0002] The invention relates to a laminated core for an electrical machine, in particular a motor vehicle. The invention also relates to an electrical machine for a motor vehicle having at least one such laminated core. Furthermore, the invention also relates to a motor vehicle.

[0003] EP 2 933 901 B1 discloses a method for the automated production of a stator winding of a rotating electrical machine. Furthermore, DE 102008 064495 B3 discloses an electrical machine.

[0004] EP 3 324 517 A1 discloses an electric machine. Furthermore, US 2021 / 0347245 A1 discloses a cooling system for an electric motor.

[0005] The object of the present invention is to provide a laminated core for an electrical machine, in particular of a motor vehicle, an electrical machine for a motor vehicle with at least one such laminated core, and a motor vehicle, so that a particularly advantageous temperature control, i.e. cooling and / or heating, of the laminated core can be realized in a particularly simple manner.

[0006] This object is achieved according to the invention by a laminated core having the features of patent claim 1, by an electrical machine having the features of patent claim 8, and by a motor vehicle having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] A first aspect of the invention relates to a laminated core for an electrical machine, in particular of a motor vehicle. This means, for example, that the motor vehicle, also simply referred to as a vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, has the electrical machine in its fully manufactured state and can be driven by means of the electrical machine, in particular purely electrically. The electrical machine has the laminated core. The laminated core has at least three laminated core parts arranged consecutively and one behind the other in the axial direction of the laminated core and thus in the axial direction of the electrical machine. When the laminated core is in the installed position, the axial direction of the laminated core coincides with the axial direction of the electrical machine.In particular, the electric machine comprises a stator and a rotor, which is driven by the stator and thus rotatable relative to the stator about a machine rotation axis. The axial direction of the electric machine, and thus of the laminated core, coincides with the machine rotation axis. The laminated core assumes its installed position when the electric machine, which includes the laminated core, is fully manufactured.

[0008] A first of the laminated core parts has at least two, in particular more than two, first temperature control channels through which a preferably liquid temperature control medium can flow for temperature control, i.e. for cooling and / or heating the laminated core, in particular in the axial direction of the laminated core. By means of the temperature control medium, which is designed, for example, as an oil and can be a component of the electrical machine, the laminated core can be cooled, in particular by heat transfer from the laminated core to the temperature control medium. This occurs in particular when the temperature control medium has a lower temperature than the laminated core. The temperature control medium is then used as a coolant, in particular as a cooling liquid, to cool the laminated core. It is also conceivable for the temperature control medium to be used to heat the laminated core.In this case, heat is transferred from the temperature control medium to the laminated core, which occurs particularly when the temperature control medium has a higher temperature than the laminated core. In particular, the temperature control medium is an oil. In particular, the temperature control medium can flow through the respective first temperature control channel along a respective first flow direction, wherein it is preferably provided that the first flow direction runs in the axial direction of the laminated core and thus of the electric machine, thus parallel to the axial direction of the laminated core.

[0009] In particular, the first laminated core part is formed from a plurality of separately formed and interconnected laminated core parts, in particular individual laminates, which can be arranged successively in the axial direction of the laminated core. The first laminated core part has a first axial end face. A second of the laminated core parts adjoins the first axial end face of the first laminated core part axially, i.e. in the axial direction of the laminated core and thus of the electrical machine. The second laminated core part has a second axial end face which, in the axial direction of the laminated core and thus of the electrical machine, faces away from the first end face of the first laminated core, i.e., points away. A third of the laminated cores adjoins the second end face of the second laminated core axially, i.e., in the axial direction of the laminated core and thus of the electrical machine.The second laminated core part has at least one, in particular more than one, second temperature control channel, which is fluidically connected at least to the two first temperature control channels of the first laminated core part and through which the temperature control medium can flow at least from the two first temperature control channels. This means that the temperature control medium can flow, in particular initially, through the first temperature control channels and out of the temperature control channels, thereby flowing into the second temperature control channel common to the first temperature control channels and subsequently flowing through the second temperature control channel. In particular, the temperature control medium can flow through the second temperature control channel in the axial direction of the laminated core.This means, for example, that the temperature control medium can flow through the second temperature control channel along a second flow direction, wherein the second flow direction preferably runs in the axial direction of the laminated core, thus parallel to the axial direction of the laminated core. Because the second temperature control channel is fluidically connected to the second temperature control channels, the first temperature control channels are, so to speak, merged into or to the second temperature control channel, so that the second laminated core part brings about a channel merger or channel merging. During channel merging, the first temperature control channels are merged to form the second temperature control channel. Since the second temperature control channel runs in the second laminated core part, the aforementioned channel merging is integrated into the second laminated core part and is thus an integrated channel merging.For example, the second laminated core part is formed from a plurality of second laminated core parts, in particular second individual laminates, which are formed separately from one another and connected to one another and can be arranged consecutively in the axial direction of the laminated core. Alternatively or additionally, for example, the third laminated core part can be formed from a plurality of third laminated core parts, in particular individual laminates, which are formed separately from one another and connected to one another and can be arranged consecutively in the axial direction of the laminated core. When reference is made below to the axial direction or "axial", this means, unless otherwise stated, the axial direction of the laminated core and thus of the electrical machine.

[0010] The second temperature control channel has a first flow cross-section through which the temperature control medium can flow, in particular along or in the second flow direction. The third temperature control channel, which is axially adjacent to the second end face of the second laminated core part, has a third temperature control channel that is fluidically connected to the second temperature control channel and through which the temperature control medium from the second temperature control channel can flow. This third temperature control channel has a second flow cross-section that is smaller than the first flow cross-section. In particular, the temperature control medium can flow through the third temperature control channel in the axial direction of the laminated core.In other words, for example, the third temperature control channel can be flowed through by the temperature control medium along a third flow direction, wherein the third flow direction preferably runs in the axial direction of the laminated core, thus parallel to the axial direction of the laminated core. In particular, it is provided that for each second temperature control channel of the second laminated core part, in particular precisely, an associated third temperature control channel of the third laminated core part is provided, wherein the second temperature control channel is fluidically connected to the associated third temperature control channel, so that the temperature control medium, in particular the same temperature control medium, can flow through the second temperature control channel and the third temperature control channel.The third temperature control channel has a second flow cross-section that is smaller than the first flow cross-section, so that a constriction, a narrowing, or a reduction in the flow cross-section is formed or brought about by the third temperature control channel or by the third laminated core part. This results in a jet formation, within the scope of which a spray jet, also simply referred to as a jet, is formed from the temperature control medium by means of the third temperature control channel or by means of the third flow cross-section. This spray jet is formed by the temperature control medium flowing through the third temperature control channel. This spray jet can be or is sprayed, for example, from the laminated core as a whole into the area surrounding the laminated core, in particular during operation of the electrical machine.It can be seen that the second temperature control channel bundles and thus brings together the first temperature control channels and thus the temperature control medium flowing through the first temperature control channels and embodied, for example, as an oil, wherein the third temperature control channel forms the aforementioned spray jet from the temperature control medium flowing through the second temperature control channel and the third temperature control channel, which spray jet is sprayed out of the laminated core into its surroundings via the third temperature control channel. For example, the spray jet sprayed out of the laminated core is sprayed against a partial area of ​​at least one winding of the electrical machine carried by the laminated core. In particular, the partial area can be a winding overhang of the winding, the winding overhang of which is particularly advantageously wetted with the temperature control medium by the spray jet being sprayed against the winding overhang. As a result, the winding overhang can be temperature-controlled particularly advantageously.Overall, the laminated core enables particularly advantageous guidance of the temperature control medium and advantageous delivery of the spray jet, eliminating the need for additional components for guiding the temperature control medium and generating the spray jet. This allows for particularly simple, time- and cost-effective production or assembly of the laminated core and the electrical machine.

[0011] In particular, the third tempering channel opens at a fourth axial end face of the third laminated core part, the fourth axial end face of which faces away from the first axial end face and from the second axial end face in the axial direction of the laminated core, and thus points away.

[0012] In order to achieve particularly advantageous temperature control, it is preferably provided that the respective temperature control channel is formed, in particular, completely circumferentially along its respective circumferential direction and directly through the respective laminated core part. The respective circumferential direction of the respective temperature control channel extends around the respective flow direction along which the temperature control medium can or does flow through the respective temperature control channel.

[0013] The second laminated core part adjoins the first laminated core part in a connection direction running in the axial direction of the laminated core, and the third laminated core part adjoins the second laminated core part in the connection direction. It is preferably provided that, viewed in the connection direction, the third laminated core part is the last laminated core part of the laminated core, which completes the laminated core, thereby enabling particularly advantageous beam formation and thus temperature control.

[0014] The first laminated core part has a third axial end face which points away in the axial direction from the first axial end face and from the second axial end face and also from the fourth axial end face, and is thus facing away.

[0015] In order to be able to realize a particularly simple and thus cost-effective supply of the temperature control channels with the temperature control medium and consequently a particularly advantageous temperature control, it is provided in one embodiment of the invention that the laminated core has a fourth laminated core part which adjoins the third axial end face of the first laminated core part axially, i.e. in the axial direction of the laminated core, and which has a fourth temperature control channel which is fluidically connected to one of the first temperature control channels and a fifth temperature control channel which is fluidically connected to the other of the first temperature control channels.The fourth temperature control channel and the fifth temperature control channel each have an inlet opening extending in the radial direction or obliquely to the radial direction of the laminated core and thus of the electrical machine, through which the preferably liquid temperature control medium can be introduced from outside the laminated core into the fourth temperature control channel and the fifth temperature control channel in the radial direction or along a direction running obliquely to the radial direction of the laminated core and thus of the electrical machine. Unless otherwise stated, references to "radial" or "radial direction" refer to the radial direction of the laminated core and thus of the electrical machine, perpendicular to the radial direction of the laminated core and thus of the electrical machine.This embodiment enables a particularly simple and advantageous introduction of the temperature control medium into the fourth temperature control channel and the fifth temperature control channel, and via these into the other temperature control channels of the laminated core. The previous and following explanations regarding the respective first temperature control channel, the second temperature control channel, and the third temperature control channel can also be readily applied to the fourth temperature control channel and the fifth temperature control channel, and vice versa.

[0016] Another embodiment is characterized by the fact that the laminated core components are manufactured separately and independently of one another and are arranged adjacent to one another in the axial direction of the laminated core, thus joining them together. This allows for a particularly simple and cost-effective construction of the laminated core, thus enabling particularly effective and efficient cooling in a simple and cost-effective manner.

[0017] For example, the fourth laminated core part is formed or composed of a plurality of fourth sheet metal parts, in particular individual sheets, which are formed separately from one another and connected to one another and are arranged successively, for example, in the axial direction. It is conceivable for the respective sheet metal part to be formed integrally, thus being formed from a single piece. In other words, it is preferably provided that the respective sheet metal part is not composed of a plurality of parts formed separately from one another and connected to one another, but rather the respective sheet metal part is preferably formed from a single piece, thus being formed by a monoblock or being designed as a monoblock.In a further, particularly advantageous embodiment of the invention, it is provided that the first laminated core part has a plurality of teeth, which are arranged successively in the circumferential direction of the laminated core running around the axial direction of the laminated core, for supporting the aforementioned winding. In particular, the winding has first longitudinal regions over which the winding is held on the teeth. Second longitudinal regions of the winding protrude from the laminated core, for example in the axial direction of the laminated core and form, for example, the aforementioned winding overhang. In particular, when the laminated core is a component of the stator of the electrical machine, the teeth are also referred to as stator teeth. Furthermore, it is provided that the first laminated core part has a plurality of slots, which are arranged successively in the circumferential direction of the laminated core running around the axial direction of the laminated core and are arranged between the teeth for passing through the winding.In other words, for example, in the fully manufactured state of the electrical machine, the winding, in particular the first length regions, is guided through the slots, in particular in the axial direction.

[0018] The first temperature control channels of the first laminated core are channels or are also simply referred to as channels. In order to be able to realize particularly effective and efficient temperature control, a further embodiment of the invention provides that a first of the channels is assigned to one of the teeth, wherein in the radial direction of the laminated core and thus of the electrical machine, the assigned first channel overlaps at least partially towards the outside. This allows the temperature of one tooth to be controlled particularly advantageously. The previous and following explanations regarding one tooth can easily be applied to the other teeth and vice versa.

[0019] Furthermore, it is preferably provided that the second channel is assigned to one of the slots, wherein the one slot is at least partially overlapped outwardly in the radial direction of the laminated core by the assigned second channel. This allows the temperature of one slot and thus the first longitudinal region of the winding arranged in the one slot to be effectively and efficiently controlled. The previous and following statements regarding one slot can easily be applied to the other slots, and vice versa.

[0020] A further embodiment is characterized in that the first channel has a radially elongated flow cross-section through which the tempering medium can flow. In other words, the first channel is preferably designed as a slot whose elongated extension or elongated extension direction runs in the radial direction of the laminated core. This allows for particularly advantageous tooth tempering.

[0021] To enable particularly advantageous temperature control of the groove, a further embodiment of the invention provides for the second channel to have a flow cross-section that is elongated, viewed in the circumferential direction of the laminated core, and through which the temperature control medium can flow. In other words, it is preferably provided that the second channel is a slot whose elongated extension or direction of extension runs in the circumferential direction of the laminated core. This allows the groove to be temperature-controlled particularly effectively and efficiently.

[0022] It is preferably provided that the first flow cross-section and / or the second flow cross-section are circular, whereby a particularly advantageous formation of the spray jet can be realized. The grooves and the teeth of the first laminated core part form a groove pattern or are part of a groove pattern which is also provided, for example, in the second laminated core part, the third laminated core part and / or the fourth laminated core part. Thus, the previous and following statements regarding the first laminated core part with regard to the grooves and the teeth can also be transferred to the second laminated core part, the third laminated core part and the fourth laminated core part. For example, the statements regarding the first channel of the first laminated core part can also be transferred to the fourth tempering channel, which is, for example, fluidically connected to the first channel.Furthermore, the previous statements regarding the second channel can be applied to the fifth temperature control channel, which is fluidly connected to the second channel, for example. This allows for particularly advantageous guidance of the temperature control medium and, consequently, particularly advantageous temperature control.

[0023] A second aspect of the invention relates to an electric machine for a motor vehicle, wherein the electric machine has at least one laminated core according to the first aspect of the invention. 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.

[0024] In a particularly advantageous embodiment of the second aspect of the invention, the electric machine comprises the stator and the rotor, wherein the laminated core is a laminated core of the stator, thus a stator laminated core. This allows for particularly advantageous temperature control of the electric machine.

[0025] A third aspect of the invention relates to a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, which has at least one electric machine according to the second aspect of the invention and can be driven, in particular purely electrically, by means of the electric machine. Advantages and advantageous embodiments of the first aspect and 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.

[0026] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. In the drawings:

[0027] Fig. 1 is a schematic and perspective exploded view of a

[0028] Laminated core for an electrical machine of a motor vehicle;

[0029] Fig. 2 shows a partial schematic perspective view of the laminated core;

[0030] Fig. 3 shows a further schematic perspective view of the

[0031] laminated core;

[0032] Fig. 4 shows a further schematic perspective view of the

[0033] laminated core; and

[0034] Fig. 5 shows a further schematic perspective view of the

[0035] sheet package.

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

[0037] Fig. 1 shows a schematic and perspective exploded view of a laminated core 1 for an electric machine of a motor vehicle, also simply referred to as a vehicle. This means that the motor vehicle, in its fully manufactured state, has the electric machine and can be driven by the electric machine, in particular purely electrically. The electric machine has a stator and a rotor, which can be driven by the stator and is therefore rotatable about a machine axis of rotation relative to the stator. Via its rotor, the electric machine can provide drive torques for driving the motor vehicle. The motor vehicle is thus, for example, a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV).Preferably, the electrical machine is 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 most preferably amounts to several hundred volts.

[0038] The laminated core 1 is preferably a component of the stator and thus a stator laminated core. The laminated core 1 has, in this case, seven laminated core parts, namely a first laminated core part 2, a second laminated core part 3, a third laminated core part 4, a fourth laminated core part 5, a fifth laminated core part 6, a sixth laminated core part 7, and a seventh laminated core part 8. The laminated core parts 2 and 6 are preferably identical, and thus structurally identical. Preferably, the laminated core parts 3 and 7 are identical, and thus structurally identical. Furthermore, it is preferably provided that the laminated core parts 4 and 8 are identical, and thus structurally identical. It can be seen that the laminated core parts 2, 3, 4, 5, 6, 7 and 8 are arranged one after the other in the axial direction of the laminated core 1 and thus of the electrical machine, whose axial direction coincides with the axial direction of the laminated core 1 and with the machine rotation axis.The axial direction of the laminated core 1 and thus of the electrical machine is illustrated by a double arrow 9. It can be seen that in the axial direction of the laminated core 1, the laminated core parts 4 and 8 are the last laminated core parts of the laminated core 1. Furthermore, it can be seen that the laminated core part 2 is arranged in the axial direction between the laminated core parts 3 and 5 and the laminated core part 3 is arranged in the axial direction between the laminated core parts 2 and 4. The laminated core part 5 is arranged in the axial direction between the laminated core parts 2 and 6, the laminated core part 6 is arranged in the axial direction between the laminated core parts 5 and 7, and the laminated core part 7 is arranged in the axial direction between the laminated core parts 6 and 8. In particular, the laminated core part 5 is arranged in the axial direction of the laminated core 1 exactly in the middle of the laminated core 1, so that the laminated core part 5 is also referred to as the middle part.

[0039] From Fig. 1, using the example of the laminated core part 4, it is particularly clear that the respective laminated core part 2, 3, 4, 5, 6, 7, 8 has a plurality of teeth 10, also referred to as stator teeth, which follow one another in the circumferential direction running around the axial direction of the laminated core 1, as well as a plurality of slots 11, also referred to as stator slots, which follow one another in the circumferential direction of the laminated core 1 and are arranged between the teeth 10. The circumferential direction of the laminated core 1 is illustrated by a double arrow 12 and runs around the axial direction of the laminated core 1. In the fully manufactured state of the electrical machine, at least one winding of the electrical machine, also referred to as the stator winding, is held on the laminated core 1, in particular by the winding being held on the laminated core 1 over first length regions of the winding.The first longitudinal regions extend, for example, in the axial direction of the laminated core 1 and are guided through the slots 11. Respective second longitudinal regions of the winding protrude in the axial direction of the laminated core 1 from the laminated core 1 and thus from the last laminated core parts 4 and 8, whereby the second longitudinal regions form at least one winding head of the at least one winding. The winding head protruding in the axial direction from the laminated core 1 from the last laminated core part 4, viewed in the axial direction, can be seen in Fig. 3 and is designated by 13 there. Furthermore, Fig.1 that the laminated core part 3 adjoins the laminated core part 2 in a first connection direction running in the axial direction and illustrated by an arrow 14, and the laminated core part 4 adjoins the laminated core part 3 in the first connection direction, and the laminated core part 2 adjoins the laminated core part 5 in the first connection direction. The laminated core part 5 adjoins the laminated core part 2 in a second connection direction running in the axial direction, opposite to the first connection direction and illustrated by an arrow 15, and the laminated core part 6 adjoins the laminated core part 5 in the second connection direction, and the laminated core part 7 adjoins the laminated core part 6 in the second connection direction, and the laminated core part 8 adjoins the laminated core part 7 in the second connection direction.

[0040] From Fig. 2, it can be seen that the respective laminated core part 2, 6 has a plurality of first temperature control channels 16 and 17, wherein the first temperature control channels 16 are also referred to as first channels and the first temperature control channels 17 are also referred to as second channels. A preferably liquid temperature control medium can flow through the temperature control channels 16 and 17 for temperature control, i.e., for cooling and / or heating the laminated core 1.

[0041] The laminated core part 2 has a first axial end face A1, with the laminated core part 3 adjoining the axial end face A1 in the axial direction of the laminated core 1. The laminated core part 3 has a second axial end face A2, with the laminated core part 4 adjoining the axial end face A2 axially, i.e. in the axial direction of the laminated core 1. In Fig. 2, arrows 18 illustrate a respective flow of the temperature control medium through the temperature control channels 16 and 17. It can be seen that the laminated core part 3 has second temperature control channels 19 and 20. The temperature control channels 19 are also referred to as third channels, for example, and the temperature control channels 20 are also referred to as fourth channels, for example.2 that one of the temperature control channels 19 is fluidically connected to at least two, in particular to at least or exactly three, of the first temperature control channels 16 and 17 of the first laminated core part 2, in this case such that one of the temperature control channels 19 is fluidically connected to at least or exactly two of the temperature control channels 17 and to at least or exactly one of the temperature control channels 16. As a result, two of the temperature control channels 17 and one of the temperature control channels 16 are combined, in particular exactly, to form one of the temperature control channels 19, thus being bundled, so that the laminated core part 3 effects channel bundling or channel merging. Furthermore, it can be seen that, for example, the respective temperature control channel 20 is fluidically connected, in particular exactly, to one of the temperature control channels 16.

[0042] The respective temperature control channel 16, 17 has a respective first flow cross-section through which the temperature control medium can flow.

[0043] The laminated core part 4 has third temperature control channels 21 and 22, wherein one of the temperature control channels 21 is fluidically connected to one of the temperature control channels 19, and one of the temperature control channels 22 is fluidically connected to one of the temperature control channels 20. The respective temperature control channel 20, 21 has a respective second flow cross-section, which is smaller than the respective first flow cross-section. As a result, the laminated core part 4 causes a cross-sectional constriction or tapering. This allows the temperature control medium to flow through the temperature control channels 16, 17, 19, 20, 21, and 22, whereby the temperature control channels 21 and 22 form a spray jet, also referred to simply as a jet, from the temperature control medium flowing through the temperature control channels 21 and 22, which is sprayed out of the laminated core 1 as a whole via the temperature control channels 21 and 22 and thereby sprayed onto an area 23 surrounding the laminated core 1. In Fig.In Fig. 2, arrows 24 illustrate the spray jets that flow out of the temperature control channels 21 and 22 and are sprayed into the surrounding area 23 via them. It can be seen that the respective second flow cross-section of the respective temperature control channel 21, 22 is circular, whereby the respective spray jet is formed particularly advantageously. The spray jets are shown particularly schematically in Fig. 3 and designated 25. From Fig. 3, it can be seen that the spray jets 25 are sprayed against the winding head 13, which is thereby wetted with the temperature control medium forming the spray jets 25. As a result, the winding head 13 is effectively and efficiently temperature-controlled.

[0044] The laminated core part 4 has a fourth axial end face A4, which faces away from the end faces A1 and A2 in the axial direction, thus facing away. From Fig. 2, it can be seen that the tempering channels 21 and 22 open into or onto the surrounding area 23 at the axial end face A4, so that the spray jets 25 are ejected from the laminated core 1 as a whole at the fourth axial end face A4.

[0045] From Fig. 2, it can be seen that the temperature control channels 16 and 17, which are fluidically connected to the temperature control channel 19, are spaced apart from one another, particularly in the circumferential direction of the laminated core 1. This results in a flow redirection, during which the temperature control medium is redirected on its path from the temperature control channels 16 and 17, which are fluidically connected to the temperature control channel 19, to and into the temperature control channel 19. This flow redirection occurs during channel merging, during which the two temperature control channels 17 and the one temperature control channel 16 are merged or combined, thus bundled, to form the temperature control channel 19.

[0046] The first laminated core part 2 has a third axial end face A3, which faces away from the axial end faces A1 and A2 and also from the axial end face A4 in the axial direction, thus facing away. The fourth laminated core part 5 adjoins the third axial end face A3 of the first laminated core part 2 in the second connection direction and thus in the axial direction of the laminated core 1.

[0047] For example, it is provided that the laminated core part 5 has a fourth temperature control channel 26 for each temperature control channel 16 of the laminated core part 2, in particular precisely, and a fifth temperature control channel 27 for each temperature control channel 17 of the laminated core part 2, in particular precisely,. The respective temperature control channel 26 is fluidically connected to the respective temperature control channel 16, and the respective temperature control channel 27 is fluidically connected to the respective temperature control channel 17. As a result, the temperature control channels 16 can be supplied with the temperature control medium via the temperature control channels 26, and the temperature control channels 17 can be supplied with the temperature control medium via the temperature control channels 27. The respective temperature control channel 26, 27 has a respective inlet opening that extends in the radial direction of the laminated core 1 or obliquely to the radial direction of the laminated core 1. The radial direction of the laminated core 1 is illustrated by a double arrow 28.The feature that the respective inlet opening extends in the radial direction of the laminated core 1, the radial direction of which runs in the radial direction of the electrical machine, means that the temperature control medium can be introduced from outside the laminated core 1 and thus from the surroundings 23 in the radial direction of the laminated core 1 or along a direction running obliquely to the radial direction of the laminated core 1 through the respective inlet opening and thereby into the respective temperature control channel 26, 27, so that the temperature control channels of the laminated cores 2, 3, 4, 6, 7 and 8 can be supplied with the temperature control medium via the central part (laminated core part 5). In other words, the temperature control medium can be introduced into the central part in the radial direction or in the direction running obliquely to the radial direction and distributed via this to the temperature control channels of the other laminated core parts 2, 3, 4, 6, 7 and 8.

[0048] The tempering channels 21 and 22 of the laminated core part 4 are also particularly clearly visible in Fig. 4. Furthermore, the teeth 10 and the grooves 11 arranged therebetween are particularly clearly visible in Fig. 4. The spray jets 25 are also shown in Fig. 5.

[0049] As can be seen from Figs. 2 and 4, the respective temperature control channel 16 has a flow cross-section that is elongated, viewed in the radial direction of the laminated core 1, and through which the temperature control medium can flow, and through which the respective tooth 10 is at least partially overlapped in the radial outward direction. This allows the teeth 10 to be particularly well temperature controlled. The respective temperature control channel 17 has a flow cross-section that is elongated, viewed in the circumferential direction of the laminated core 1, and through which the temperature control medium can flow, and through which the respective slot 11 is at least partially overlapped in the radial outward direction of the laminated core 1. This allows the slots 11 and the first longitudinal regions of the winding extending therein to be temperature controlled particularly advantageously. List of Reference Symbols

[0050] 1 sheet package

[0051] 2 first sheet package part

[0052] 3 second sheet package part

[0053] 4 third sheet package part

[0054] 5 fourth laminated core part

[0055] 6 laminated core part

[0056] 7 Laminated core part

[0057] 8 Laminated core part

[0058] 9 Double arrow

[0059] 10 teeth

[0060] 11 grooves

[0061] 12 double arrow

[0062] 13 Winding head

[0063] 14 Arrow

[0064] 15 Arrow

[0065] 16 temperature control channel

[0066] 17 Temperature control channel

[0067] 18 Arrow

[0068] 19 Temperature control channel

[0069] 20 temperature control channel

[0070] 21 Temperature control channel

[0071] 22 Temperature control channel

[0072] 23 Surroundings

[0073] 24 Arrow

[0074] 25 spray jet

[0075] 26 Temperature control channel

[0076] 27 Temperature control channel

[0077] 28 Double arrow

[0078] A1 first axial face

[0079] A2 second axial face

[0080] A3 third axial end face

[0081] A4 fourth axial end face

Claims

Patent claims Laminated core (1) for an electrical machine, with at least three laminated core parts (2, 3, 4, 5) arranged one after the other in the axial direction (9), namely: - a first laminated core part (2) which has at least two first tempering channels (16, 17) through which a tempering medium can flow for tempering the laminated core (1); - a second laminated core part (3) axially adjoining a first axial end face (A1) of the first laminated core part (2), which second laminated core part has at least one second tempering channel (19) which is fluidically connected at least to the two first tempering channels (16, 17) and can thereby be flowed through by the tempering medium from at least the two first tempering channels (16, 17) and has a first flow cross-section through which the tempering medium can flow; and - a third laminated core part (4) which is axially connected to a second axial end face (A2) of the second laminated core part (3) facing away from the first end face (A1) in the axial direction (9), said third laminated core part (4) having a third tempering channel (20) which is fluidically connected to the second tempering channel (19) and through which the tempering medium from the second tempering channel (19) can flow, said third tempering channel having a second flow cross-section which is smaller than the first flow cross-section.Laminated core (1) according to claim 1, characterized by a fourth laminated core part (5) which is axially connected to a third axial end face (A3) of the first laminated core part (2) which faces away from the first end face (A1) and from the second end face (A2) in the axial direction (9), and which has a fourth tempering channel (26) which is fluidically connected to one of the first tempering channels (16, 17) and a fifth tempering channel (27) which is fluidically connected to the other of the first tempering channels (16, 17), wherein the fourth tempering channel (26) and the fifth tempering channel (27) each have an inlet opening which extends in the radial direction (28) or obliquely to the radial direction (28), via which inlet opening the tempering medium can flow in the radial direction (28). or can be introduced from outside the laminated core (1) into the fourth tempering channel (26) and the fifth tempering channel (27) along a direction running obliquely to the radial direction (28). Laminated core (1) according to claim 1 or 2, characterized in that the laminated core parts (2, 3, 4, 5) are manufactured separately and independently of one another and are arranged next to one another in the axial direction (9). Laminated core (1) according to one of the preceding claims, characterized in that the first laminated core part (2) has a plurality of teeth (10) arranged one after the other in the circumferential direction (12) of the laminated core (1) for supporting at least one winding, and a plurality of grooves (11) arranged one after the other in the circumferential direction (12) of the laminated core (1) and arranged between the teeth (10) for passing through the winding. Laminated core (1) according to claim 4, characterized in that the first tempering channels (16, 17) are channels, wherein: - a first of the channels is assigned to one of the teeth (10) and is at least partially overlapped outwards in the radial direction (28) by the assigned first channel; and - the second channel is assigned to one of the grooves (11) and is at least partially overlapped outwards in the radial direction (28) by the assigned second channel. Laminated core (1) according to claim 5, characterized in that the first channel has a flow cross-section which, viewed in the radial direction (28), is elongated and through which the temperature control medium can flow. Laminated core (1) according to claim 5 or 6, characterized in that the second channel has a flow cross-section which, viewed in the circumferential direction (12) of the laminated core (1), elongated flow cross-section through which the temperature control medium can flow. An electric machine for a motor vehicle, comprising at least one laminated core (1) according to one of the preceding claims. An electric machine according to claim 8, characterized in that the electric machine comprises a stator and a rotor, wherein the laminated core (1) is a laminated core of the stator. A motor vehicle, comprising at least one electric machine according to claim 9.

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