Stator for an electric machine, in particular belonging to a motor vehicle, and an electric machine for a motor vehicle

Abstract

The invention relates to a stator (2) for an electric machine (1), comprising at least two temperature-control channels (6) which are at least partially separated from one another, through which a temperature-control medium can flow and via which the stator (2) is to be temperature-controlled by means of the temperature-control medium, wherein each temperature-control channel (6) has at least two length regions (L1, L2) which extend obliquely or perpendicularly to one another and are fluidically connected to one another, namely a first length region (L1) and a second length region (L2), via which the respective first length region (L1) of the respective temperature-control channel (6) can be supplied with the temperature-control medium, wherein the temperature-control channels (6) are assigned a common supply channel (10) through which the temperature-control medium can flow and via which the temperature-control channels (6) can be supplied with the temperature-control medium, and the second length regions (L2) differ from one another with regard to their flow cross sections (Q1, Q2) through which the temperature-control medium can flow.

Description

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

[0002] The invention relates to a stator for an electrical machine, in particular of a motor vehicle, according to the preamble of patent claim 1. Furthermore, the invention relates to an electrical machine for a motor vehicle.

[0003] DE 102018203939 A1 discloses a stator for an electrical machine. CN 102204062 B discloses an electrical machine. Furthermore, US 8648 505 B2 discloses an electrical machine. Furthermore, JP 5121833 B2 discloses a stator for an electrical machine.

[0004] The object of the present invention is to provide a stator for an electrical machine, in particular of a motor vehicle, as well as an electrical machine with such a stator, so that a particularly advantageous temperature control, i.e. cooling and / or heating of the electrical machine, can be realized.

[0005] This object is achieved according to the invention by a stator having the features of patent claim 1 and an electrical machine having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] A first aspect of the invention relates to a stator for an electric machine, in particular of a motor vehicle. This means that the electric machine, in its fully manufactured state, has the stator. For example, in its fully manufactured state, the electric machine also has a rotor, which can be driven, for example, by means of the stator and is thus rotatable about a machine axis of rotation relative to the stator. Thus, for example, the motor vehicle, also simply referred to as a vehicle and preferably designed as a motor vehicle, in particular as a passenger car, has the electric machine in its fully manufactured state, wherein the motor vehicle can be driven, in particular purely electrically, by means of the electric machine. Thus, the motor vehicle is preferably a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV).For example, the electric machine can provide drive torques via its rotor for driving the motor vehicle, in particular purely electrically. The electric machine is very preferably a high-voltage component whose electrical voltage, in particular the electrical operating or rated voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts.

[0007] The stator has at least two temperature control channels through which a preferably liquid temperature control medium can flow. The temperature control medium is preferably a fluid, in particular a liquid, wherein the temperature control medium can flow through the temperature control channels. Very preferably, the temperature control medium is a component of the stator. The temperature control channels are at least partially separated from one another, so that, for example, a first mass flow of the temperature control medium can flow through a first of the temperature control channels and a second mass flow of the temperature control medium can flow through a second of the temperature control channels, in particular without the mass flows mixing with one another. In particular, it is conceivable for the temperature control channels to be separated from one another over their respective, at least predominant extent or length. The stator can be temperature-controlled, i.e. cooled and / or heated, via the temperature control channels using the temperature control medium.For this purpose, while the temperature control medium flows through the temperature control channels, a heat exchange can take place between at least a partial area of ​​the stator and the temperature control medium. In order to cool the stator using the temperature control medium, for example, the temperature control medium has a lower temperature on its way through the respective temperature control channel than the aforementioned partial area, so that heat can be transferred from the partial area to the temperature control medium. This allows at least the partial area to be cooled. In order to heat at least the partial area, for example, the temperature control medium has a higher temperature than the partial area when it flows through the respective temperature control channel, so that heat can be transferred from the temperature control medium to the partial area. This allows at least the partial area to be heated. For example, the temperature control medium can be an oil. It would also be conceivable for the temperature control medium to comprise at least water.

[0008] The respective temperature control channel has at least two longitudinal sections running obliquely or perpendicular to one another and fluidically connected to one another, namely a respective first longitudinal section and a respective second longitudinal section. Thus, the respective longitudinal sections of the respective temperature control channel can be flowed through by the temperature control medium. For example, the respective longitudinal sections of the respective temperature control channel directly adjoin one another. This means that in the flow direction of the temperature control medium flowing through the respective temperature control channel, which, for example, flows through the respective temperature control channel in the flow direction during operation of the electrical machine, no other, further longitudinal section of the respective temperature control channel runs between the respective longitudinal sections of the respective temperature control channel.The respective first length range of the respective temperature control channel can be supplied with the temperature control medium via the respective second length range of the respective temperature control channel, so that, in the flow direction of the temperature control medium flowing through the respective temperature control channel, the respective first length range of the respective temperature control channel is arranged downstream of the respective second length range of the temperature control channel. Conversely, in the flow direction of the temperature control medium flowing through the respective temperature control channel, the respective second length range of the respective temperature control channel is arranged upstream of the respective first length range of the respective temperature control channel.

[0009] For example, the respective first longitudinal region of the respective temperature control channel runs in the axial direction of the stator, i.e. parallel to the axial direction of the stator, so that, for example, the respective first longitudinal region of the respective temperature control channel runs perpendicular to a first plane which runs perpendicular to the axial direction of the stator, the radial direction of which runs perpendicular to the axial direction of the stator. The axial direction of the stator coincides with the aforementioned machine axis of rotation. Furthermore, it is conceivable for the respective first longitudinal region of the respective temperature control channel to run obliquely to the first plane. Alternatively or additionally, it is conceivable for the respective first longitudinal region of the respective temperature control channel to run in a second plane which runs obliquely or perpendicular to the first plane.It is conceivable that the second plane runs in the axial direction of the stator, i.e. parallel to the axial direction of the stator and thus parallel to the machine rotation axis. The respective second length range of the respective temperature control channel runs, for example, in the radial direction of the stator. For example, the respective second length range of the respective temperature control channel runs obliquely or parallel to the first plane. It is conceivable that the respective second length range runs obliquely or perpendicular to the second plane. Since the respective first length range of the respective temperature control channel can be supplied with the temperature control medium from the respective second length range by means of the respective second length range of the respective temperature control channel, the respective second length range is also referred to as a feed or oil feed, particularly when the temperature control medium is an oil.If, for example, the respective second length range runs in the radial direction of the stator, i.e. parallel to the radial direction of the stator, the respective second length range of the respective temperature control channel is also referred to as radial feed or radial oil feed.

[0010] In order to be able to realize particularly advantageous temperature control, i.e. cooling and / or heating of the stator, i.e. at least of the aforementioned partial region of the stator, it is provided according to the invention that the temperature control channels are assigned, in particular precisely, a common supply channel through which the temperature control medium can flow, via which the temperature control channels, in particular both or all of the temperature control channels can be supplied with the temperature control medium. The supply channel is thus arranged upstream of the respective temperature control channel, i.e. upstream of both temperature control channels, in the flow direction of the temperature control medium flowing through the supply channel and the respective temperature control channel. In particular, the temperature control channels are thus connected in parallel to one another in terms of flow. Furthermore, the respective temperature control channel is thus, for example, connected in series with the supply channel in terms of flow.In particular, it is provided that the respective temperature control channel is directly connected to the supply channel, so that in the flow direction of the temperature control medium flowing through the supply channel and the respective temperature control channel, no other, additional channel of the stator runs between the supply channel and the respective temperature control medium. The respective temperature control channel is fluidically connected to the supply channel, so that the temperature control medium initially flowing through the supply channel can flow out of the supply channel and subsequently into the respective temperature control channel and subsequently through the respective temperature control channel. In particular, if the respective temperature control channel is directly connected to the supply channel, the respective temperature control channel branches off directly from the supply channel, so to speak.Here, it may be advantageous to ensure that, when the stator is supplied with the temperature control medium from the center, the temperature control medium flows in both axial directions of the stator after the supply channel and not just in one direction.

[0011] For example, it is provided that the supply channel extends in the circumferential direction of the stator, the circumferential direction of which runs around the machine axis of rotation and thus around the axial direction of the stator, in particular around the temperature control channels. In particular, it is provided, for example, that the respective second longitudinal region runs obliquely or perpendicular to the supply channel. This is to be understood in particular that, for example, the respective second longitudinal region of the respective temperature control channel runs perpendicular to a respective third plane which, for example, is tangent to the supply channel. In this case, it is particularly conceivable that the third plane runs parallel to the axial direction of the stator. In particular, it is conceivable that, viewed in the circumferential direction of the stator running around the axial direction of the stator and thus around the machine axis of rotation, the second longitudinal regions are spaced from one another and follow one another.Furthermore, it is conceivable that, viewed in the circumferential direction of the stator, the first length regions are spaced apart from one another and follow one another.

[0012] Since, in the flow direction of the temperature control medium flowing through the supply channel and the respective temperature control channel, the respective second length range of the respective temperature control channel is arranged upstream of the respective first length range of the respective temperature control channel and downstream of the supply channel, the respective second length range of the respective temperature control channel is arranged between the respective first length range of the respective temperature control channel and the supply channel. In particular, it can be provided that, viewed in the radial direction of the stator, the respective second length range of the respective temperature control channel is arranged between the respective first length range of the respective temperature control channel and the supply channel.

[0013] Furthermore, the invention provides that the second length regions differ from one another with regard to their flow cross-sections through which the temperature control medium can flow. This means that one of the second length regions has a first flow cross-section through which the temperature control medium can flow, and the other second length region has a second flow cross-section through which the temperature control medium can flow, so that, in particular during the aforementioned operation, the temperature control medium flows through the first flow cross-section and the second flow cross-section, in particular on its way from the supply channel to and into the first length regions. The first flow cross-section and the second flow cross-section differ from one another, so that, for example, the first flow cross-section is larger or smaller than the second flow cross-section.This allows for an advantageous, at least substantially uniform distribution or apportionment of the temperature control medium from the supply channel across the second length ranges to the first length ranges, thus enabling a particularly advantageous, in particular at least substantially uniform, temperature control of the stator. Since the first flow cross-section and the second flow cross-section differ from one another, the flow cross-sections of the second length ranges are, so to speak, an assistance system to one another, i.e., they are designed differently from one another. This prevents an excessively uneven distribution of the temperature control medium from the supply channel to the first length ranges.Since the temperature control medium can be supplied or is supplied to the first length regions from the supply channel via the second length regions and thus via the aforementioned flow cross-sections of the second length regions, the first flow cross-section and the second flow cross-section, thus the flow cross-sections of the second length regions, are also referred to as supply cross-sections or supply cross-sections. If, for example, the first flow cross-section is smaller than the second flow cross-section, the temperature control medium is throttled more strongly by means of the first flow cross-section than by means of the second flow cross-section, so that a particularly advantageous, in particular at least substantially uniform, distribution of the temperature control medium from the supply channel to the first length regions can be realized.

[0014] It has proven particularly advantageous if the respective second length ranges differ from one another with respect to their respective smallest flow cross-sections through which the temperature control medium can flow. This means that the first flow cross-section is the smallest flow cross-section through which the temperature control medium can flow in the second length range having the first flow cross-section, and that the second flow cross-section is the smallest flow cross-section through which the temperature control medium can flow in the second length range having the second flow cross-section. This allows the temperature control medium to be distributed particularly advantageously between the second length ranges, so that particularly advantageous temperature control, i.e., cooling and / or heating of the stator, can be achieved.

[0015] In order to be able to realize a particularly advantageous supply of the temperature control channels with the temperature control medium and thus a particularly advantageous temperature control of the stator, it is provided in a further embodiment of the invention that the supply channel is assigned, in particular precisely, a supply channel which runs obliquely or perpendicular to the supply channel and through which the temperature control medium can flow, via which the supply channel can be supplied with the temperature control medium. This means that in the flow direction of the temperature control medium flowing through the supply channel, the supply channel, and the temperature control channels, the supply channel is arranged upstream of the supply channel, so that the supply channel is arranged downstream of the supply channel and upstream of the temperature control channels in the flow direction of the temperature control medium flowing through the supply channel, the supply channel, and the temperature control channels.For example, the supply channel runs perpendicular to a fourth plane, which, for example, is tangent to the supply channel, particularly when the supply channel runs in the circumferential direction of the stator, in particular such that the supply channel runs in an arcuate, in particular circular, manner when viewed in the first plane running perpendicular to the axial direction of the stator. It is conceivable that the fourth plane coincides with one of the third planes. In particular, it is conceivable that the fourth plane runs in the axial direction of the stator, thus running parallel to the axial direction of the stator. For example, the fourth plane runs perpendicular to the first plane.

[0016] To achieve particularly advantageous temperature control of the stator, it has proven particularly advantageous if, viewed in the circumferential direction of the stator, one of the second length regions is spaced further from the supply channel than the other second length region. This allows the temperature control medium to be advantageously supplied to the first length regions, allowing the stator to be advantageously temperature controlled.

[0017] In order to distribute the temperature control medium from the feed channel and from the supply channel particularly advantageously to the first length ranges, in particular in such a way that an at least substantially uniform distribution of the temperature control medium to the first length ranges and consequently an at least substantially uniform temperature control of the stator can be realized, it is provided in a further embodiment of the invention that the flow cross section of the other second length range is smaller than the second flow cross section of the one second length range.

[0018] The supply channel is also referred to as the global supply or global temperature control medium supply. Since the flow cross-section of the other second length region is preferably smaller than the flow cross-section of the one second length region, and since the one second length region is preferably further away from the supply channel, i.e. further away from the global supply, than the other second length region when viewed in the circumferential direction of the stator, the temperature control medium is throttled more strongly on its way to and into the first length regions by means of the other second length region than by means of the one second length region, whereby a particularly advantageous, in particular at least substantially uniform distribution of the temperature control medium over the first length regions can be achieved. This makes it possible to avoid local overheating and the resulting damage to the stator. Likewise, excessively low stator temperatures can be avoided.As a result, the electrical machine can achieve particularly high performance.

[0019] In a further embodiment of the invention, it has proven particularly advantageous if the smallest flow cross-section of the other second length range through which the temperature control medium can flow is smaller than the smallest flow cross-section of the one second length range through which the temperature control medium can flow. This allows advantageous, different throttling through the second length ranges to be realized, so that a particularly advantageous, in particular at least substantially uniform, distribution or apportionment of the temperature control medium from the supply channel to the first length ranges can be achieved. As a result, the stator can be temperature-controlled, i.e., cooled and / or heated, in a particularly advantageous, in particular at least substantially uniform, manner.

[0020] In order to be able to supply the first length regions particularly advantageously with the temperature control medium and subsequently advantageously temperature control the stator, it is provided in a further embodiment of the invention that, in particular in the flow direction of the temperature control medium flowing through the temperature control channels, the smallest flow cross section of the other second length region is followed by a flow cross section of the other second length region through which the temperature control medium can flow, which is larger than the smallest flow cross section of the other second length region.Alternatively or additionally, it can be provided that, particularly with regard to the flow direction of the temperature control medium flowing through the temperature control channels, the smallest flow cross-section of the other second length range is preceded by a flow cross-section of the other second length range through which the temperature control medium can flow, which is larger than the smallest flow cross-section of the other second length range. This means that, in the flow direction of the temperature control medium flowing through the respective temperature control channel, the other second length range has a further flow cross-section downstream and / or upstream of the smallest flow cross-section of the other second length range, which is larger than the smallest flow cross-section of the other second length range. This allows a particularly advantageous division or distribution of the temperature control medium between the first length ranges to be achieved.In order to be able to control the temperature of the stator particularly advantageously, a further embodiment of the invention provides for the respective temperature control channel to run, in particular entirely, within a laminated core of a stator. In particular, for example, the respective temperature control channel is formed completely circumferentially along its respective circumferential direction directly by the laminated core.

[0021] The laminated core, for example, is composed of stamped individual sheets, also referred to as sheet segments. The temperature control channels and, in particular, the flow cross-sections can be produced easily and as required, particularly by stamping the sheet segments, so that particularly advantageous temperature control of the stator can be achieved in a particularly simple manner. During production of the laminated core, i.e., during a process for producing the laminated core, which is assembled or assembled from the sheet segments and thus manufactured, the alignment of the sheet segments relative to one another is then taken into account, for example, in order to be able to advantageously produce the temperature control channels during the process.The alignment of the sheet metal segments relative to one another can, for example, depend on at least one or more markings with which the sheet metal segments are or will be provided. For example, the respective marking is arranged on a respective circumference of the respective sheet metal segment or its punching geometry. For example, the marking is or comprises a groove. For example, the marking can advantageously be produced by punching the sheet metal segment. In particular, the marking or the markings enable an advantageous alignment of the sheet metal segments relative to one another in the circumferential direction of the stator, whereby the laminated core and subsequently the temperature control channels can be advantageously produced.

[0022] Finally, it has proven particularly advantageous if the supply channel (in particular in the radial direction of the stator towards the inside) is delimited at least partially, in particular at least predominantly and thus at least more than half or completely, by the laminated core, in particular directly. This allows an advantageous supply of the temperature control channels with the temperature control medium to be realized, so that the stator can be advantageously temperature controlled.

[0023] It is conceivable for the supply channel to run, in particular completely, outside the laminated core, as a result of which, for example, the supply channel can advantageously be supplied with the temperature control medium. For example, the supply channel runs, in particular completely, within a stator housing that is designed separately from the laminated core, in the housing of which, for example, the laminated core is arranged at least partially, in particular at least predominantly and thus at least more than half or completely. In particular, it is conceivable for the supply channel to open directly into the supply channel, so that no other, further channel of the stator runs between the supply channel and the supply channel in the flow direction of the temperature control medium flowing through the supply channel and the supply channel.

[0024] A second aspect of the invention relates to an electric machine for a motor vehicle, wherein the electric machine has at least or precisely one stator 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.

[0025] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. Therein: shows a partial schematic and sectional front view of an electric machine for a motor vehicle; and

[0026] Fig. 1 shows a further schematic and sectioned

[0027] Front view of the electrical machine;

[0028] Fig. 2 shows a further schematic and sectioned

[0029] Front view of the electrical machine; and

[0030] Fig. 3 shows a further schematic and sectioned

[0031] Front view of the electric machine.

[0032] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0033] Fig. 1 shows a detail of an electric machine 1 for a motor vehicle in a schematic and sectional front view. This means that the motor vehicle, in its fully manufactured state, has the electric machine 1 and can be driven by the electric machine 1, in particular purely electrically. The electric machine 1 has a stator 2 and a rotor (not shown in detail in the figures), which can be driven by the stator 2 and is therefore rotatable about a machine axis of rotation 3 relative to the stator 2. The stator 2, whose axial direction coincides with the machine axis of rotation 3, has a laminated core 4 and a housing 5 in which the laminated core 4 is arranged. The laminated core 4 is connected at least indirectly, in particular directly, to the housing 5 in an at least rotationally fixed manner, such that relative rotations between the laminated core 4 and the housing 5 about the machine axis of rotation 3 are prevented.The housing 5 and the laminated core 4 are formed separately from each other and are connected to each other at least in a rotationally fixed manner.

[0034] It can be seen particularly well from a combination of Fig. 1 to 3 that the stator 2, the radial direction of which runs perpendicular to the axial direction of the stator 2 and thus perpendicular to the machine axis of rotation 3, has a plurality of temperature control channels 6 through which a preferably liquid temperature control medium, which is in the form of an oil, for example, can flow. This means that the temperature control medium flows through the temperature control channels 6 in a flow direction during operation of the electrical machine 1. It can be seen from Fig. 1 to 3 that the temperature control channels 6 are spaced from one another and follow one another in the circumferential direction of the stator 2 running around the axial direction of the stator 2 and thus around the machine axis of rotation 3, wherein the temperature control channels 6 are at least partially separated from one another, particularly when viewed in pairs.It can also be seen that the respective tempering channel 6 runs, in particular completely, within the laminated core 4. This is to be understood that the respective tempering channel 6 is preferably a respective channel which runs, in particular, completely within the laminated core 4.

[0035] For example, the stator 2 has at least one winding formed separately from the laminated core 4 and also separately from the housing 5, which is supported by the laminated core 4, in particular by the winding being wound around the laminated core 4. For example, a magnetic field can be generated by means of the winding, by means of which, for example, the rotor can be driven and thus rotated about the machine rotation axis 3 relative to the stator 2.

[0036] 2 and 3 that the respective temperature control channel 6 has two longitudinal regions which run obliquely or, in this case, perpendicular to one another and are fluidically connected to one another, namely a respective first longitudinal region L1 and a respective second longitudinal region L2. In the exemplary embodiment shown in the figures, the respective longitudinal region L1 runs in the axial direction of the stator 2 and thus perpendicular to a first plane which runs perpendicular to the axial direction of the stator 2 and thus perpendicular to the machine rotation axis 3. In the exemplary embodiment shown in the figures, the respective second longitudinal region L2 runs in the radial direction of the stator 2 and thus parallel to the first plane. In other words, the respective second longitudinal region L2 runs perpendicular to a respective second plane which runs perpendicular to the first plane and thereby parallel to the axial direction of the stator 2.The axial direction of the stator 2 is illustrated by a double arrow 7 and runs, for example, perpendicular to the image plane of Fig. 1. The radial direction of the stator 2 is illustrated by a double arrow 8 and runs, for example, in the image plane of Fig. 1. The aforementioned circumferential direction of the stator 2 runs around the axial direction of the stator 2 and thus around the machine rotation axis 3 and is illustrated by a double arrow 9, wherein the circumferential direction runs, for example, in the first plane. The respective first length range L1 of the respective temperature control channel 6 can be supplied with the temperature control medium via the respective second length range L2 of the respective temperature control channel 6, so that in the flow direction of the temperature control medium flowing through the respective temperature control channel 6, the respective length range L2 of the respective temperature control channel 6 is arranged upstream of the respective length range L1 of the respective temperature control channel 6.In the embodiment shown in the figures, the respective length ranges L1 and L2 of the respective tempering channel 6 are directly connected to one another.

[0037] In order to be able to particularly advantageously temperature control the stator 2, that is to say at least a partial region of the stator 2, that is to say to cool and / or heat it, the temperature control channels 6 are assigned exactly one common supply channel 10 through which the temperature control medium can flow, which in the present case is delimited, for example, in the radial direction of the stator 2 inwards, in particular directly, by the laminated core 4 and, for example, in the radial direction of the stator outwards, in particular directly, by the housing 5, that is to say in particular by an inner circumferential surface of the housing 5. In particular, it is provided that the supply channel 10 runs, in particular completely, outside the laminated core 4. For example, the supply channel 10 is formed by a clearance of the housing 5 that runs completely around the circumference of the stator 2, in particular in the circumferential direction of the stator 2.The length ranges L2 and thus the temperature control channels 6 can be supplied with the temperature control medium via the supply channel 10. This means that, in the flow direction of the temperature control medium flowing through the supply channel 10 and the temperature control channels 6, the supply channel 10 is arranged upstream of, in particular all, length ranges L2 and thus upstream of, in particular all, temperature control channels 6. On its way to and into the length ranges L1, the temperature control medium first flows through the supply channel 10. From the supply channel 10, the temperature control medium can flow out inwards in the radial direction of the stator 2 and thus flow into the respective length range L2 in the radial direction of the stator 2 and subsequently flow through the respective length range L2, in particular in the radial direction of the stator 2.The temperature control medium can continue to flow out of the respective length range L2 and into the respective length range L1 and subsequently flow through the respective length range L1 axially, i.e. in the axial direction of the stator 2.

[0038] 3 and 4 that the respective second longitudinal region L2 of the respective temperature control channel 6 has a respective smallest flow cross-section through which the temperature control medium can flow, so that the temperature control medium flows through the respective smallest flow cross-section of the respective second longitudinal region L2 of the respective temperature control channel 6 on its way from or out of the supply channel 10 to and into the respective longitudinal region L1 of the respective temperature control channel 6. In Fig. 3, a first of the smallest flow cross-sections of the longitudinal regions L2 is designated Q1, and in Fig. 4, a second of the smallest cross-sections of the longitudinal regions L2 is designated Q2. The second longitudinal region L2 having the smallest flow cross-section Q1 is one of the second longitudinal regions L2, and the second longitudinal region L2 having the smallest flow cross-section Q2 is another of the second longitudinal regions L2.

[0039] The length range L2 having the smallest flow cross-section Q2 is also referred to as one of the second length ranges L1, and the length range L2 having the smallest flow cross-section Q1 is also referred to as another of the second length ranges L2. It can be seen from Figs. 3 and 4 that the one second length range L2 and the other second length range L2 differ from one another with regard to their respective smallest flow cross-sections Q1 and Q2 through which the temperature control medium can flow, in this case such that the smallest flow cross-section Q2 is smaller than the smallest flow cross-section Q1.

[0040] It can also be seen from Figs. 3 and 4 that, in this case, the supply channel 10 is assigned precisely one supply channel 11, also referred to as the global supply, through which the temperature control medium can flow. The supply channel 10 can be supplied with the temperature control medium via the supply channel 11. The supply channel 11 runs perpendicularly or, in this case, obliquely to the supply channel 10. This is implemented in this case such that the supply channel 11 runs perpendicular to a third plane, which in this case runs perpendicular to the first plane and, for example, parallel or, in this case, obliquely to the second plane.

[0041] 3 and 4 that, viewed in the circumferential direction of the stator 2, the second longitudinal region having the smallest flow cross-section Q1 is further spaced from the supply channel 11 than the other second longitudinal region L2 having the smallest flow cross-section Q2. The smallest flow cross-section Q2 of the other second longitudinal region L2 is smaller than the smallest flow cross-section Q1 of the one second longitudinal region L2. As a result, the temperature control medium from the supply channel 11 and the supply channel 10 can be divided or distributed particularly advantageously, in particular at least substantially evenly, between the first longitudinal regions L1, so that particularly advantageous, in particular at least substantially even, temperature control of the stator 2 can be achieved. It can be seen that the flow cross-section Q2 acts as a throttle, in particular as a stronger throttle, compared to the flow cross-section Q1.In other words, the temperature control medium is throttled more strongly on its way to the length ranges L1 by means of the flow cross section Q2 than by means of the flow cross section Q1, whereby the temperature control medium can be distributed particularly advantageously between the length ranges L1.

[0042] It can be seen from Fig. 2 and 3 that the laminated core 4 has, in the circumferential direction of the stator 2, successive and spaced apart and, in particular, at least partially separated slots 12 in which respective length regions LB of the aforementioned winding are accommodated.It can also be seen that between two slots 12 that are directly consecutive and thus adjacent to one another in the circumferential direction of the stator 2, one of the length ranges L1 is arranged, in particular exactly, in particular in such a way that the respective slots 12 that are adjacent to one another in the circumferential direction of the stator 2, between which the respective, in particular exactly one, length range L1 is arranged, form a pair of slots and in such a way that one of the respective slots 12 of the respective pair of slots, viewed in the circumferential direction and towards the respective other slot 12 of the respective pair of slots, is at least partially covered or overlapped by the respective length range L1 arranged in the circumferential direction between the slots 12 of the respective pair of slots. This can ensure particularly advantageous temperature control. The respective length range L1 is a respective channel region close to the slot through which the temperature control medium can flow.

[0043] In Fig. 4, the flow direction of the temperature control medium flowing through the respective length range L2 is illustrated by an arrow 13. It can be seen that, in the flow direction of the temperature control medium flowing through the length range L2 having the smallest flow cross section Q2, the smallest flow cross section Q2 is followed by a third flow cross section Q3 of the length range L2 having the smallest flow cross section Q2, wherein the flow cross section Q3 is smaller than the smallest flow cross section Q2. In addition, the smallest flow cross section Q2 is preceded by a fourth flow cross section Q4 of the second length range L2 having the smallest flow cross section Q2, wherein the fourth flow cross section Q4 is larger than the smallest flow cross section Q2. This allows advantageous throttling of the temperature control medium to be achieved, so that the temperature control medium can be advantageously distributed between the length ranges L1.

[0044] It is conceivable that at least or exactly one of the longitudinal regions L2 has the smallest flow cross-section Q1, or preferably a plurality of first longitudinal regions L2 have the flow cross-section Q1. Furthermore, it is conceivable that at least or exactly one of the longitudinal regions L2 has the flow cross-section Q2, wherein it is preferably provided that a plurality of second longitudinal regions L2 have the flow cross-section Q2. For example, the laminated core 4, viewed in the circumferential direction of the stator 2, has at least two or more regions, the number of which does not have to be even, wherein the regions follow one another in the circumferential direction of the stator 2.For example, the, in particular all, length regions L2 have the flow cross-section Q1 in at least or exactly one first of the regions, in particular in several first of the regions, and for example, the, in particular all, length regions L2 have the flow cross-section Q2 in at least or exactly one second of the regions, in particular in several second of the regions. It is conceivable that, viewed in the circumferential direction of the stator 2, the first regions and the second regions follow one another alternately. Preferably, the flow cross-sections Q1 are identical. Preferably, the flow cross-sections Q2 are identical. List of reference symbols.

[0045] 1 electric machine

[0046] 2 Stator

[0047] 3 machine rotation axis

[0048] 4 sheet package

[0049] 5 housings

[0050] 6 temperature control channel

[0051] 7 Double arrow

[0052] 8 double arrow

[0053] 9 Double arrow

[0054] 10 supply channel

[0055] 11 Feed channel

[0056] 12 grooves

[0057] 13 Arrow

[0058] L1 first length range

[0059] L2 second length range

[0060] LB length ranges

[0061] Q1 flow cross-section

[0062] Q2 flow cross-section

[0063] Q3 Flow cross-section

[0064] Q4 Flow cross-section

Claims

Patent claims 1. Stator (2) for an electrical machine (1), with at least two at least partially separate temperature control channels (6) through which a temperature control medium can flow, via which the stator (2) is to be temperature controlled by means of the temperature control medium, wherein the respective temperature control channel (6) has at least two longitudinal regions (L1, L2) extending obliquely or perpendicularly to one another and fluidically connected to one another, namely a first longitudinal region (L1) and a second longitudinal region (L2), via which the respective first longitudinal region (L1) of the respective temperature control channel (6) can be supplied with the temperature control medium, characterized in that: - a common supply channel (10) through which the temperature control medium can flow is assigned to the temperature control channels (6), via which the temperature control channels (6) can be supplied with the temperature control medium; and - the second length ranges (L2) differ from one another with regard to their flow cross-sections (Q1, Q2) through which the temperature control medium can flow.

2. Stator (2) according to claim 1, characterized in that the respective second length regions (L2) differ from one another with regard to their respective smallest flow cross sections (Q1, Q2) through which the temperature control medium can flow.

3. Stator (2) according to claim 1 or 2, characterized in that the supply channel (10) is assigned a supply channel (11) which runs obliquely or perpendicularly to the supply channel (10) and through which the temperature control medium can flow, via which the supply channel (10) can be supplied with the temperature control medium.

4. Stator (2) according to claim 3, characterized in that, viewed in the circumferential direction (9) of the stator (2), one of the second length regions (L2) is further away from the feed channel (11) than the other second length range (L2).

5. Stator (2) according to claim 4, characterized in that the flow cross-section (Q2) of the other second length region (L2) is smaller than the flow cross-section (Q1) of the one second length region (L1).

6. Stator (2) according to claim 5, characterized in that the smallest flow cross-section (Q2) of the other second length range (L2) through which the temperature control medium can flow is smaller than the smallest flow cross-section (Q1) through which the temperature control medium can flow of the one second length range (L2).

7. Stator (2) according to claim 6, characterized in that: - the smallest flow cross-section (Q2) of the other second length range (L2) is followed by a flow cross-section (Q3) of the other second length range (L2) through which the temperature control medium can flow, which is larger than the smallest flow cross-section (Q2) of the other second length range (L2); and / or - the smallest flow cross-section (Q2) of the other second length range (L2) is preceded by a flow cross-section (Q4) of the other second length range (L2) through which the temperature control medium can flow, which flow cross-section is larger than the smallest flow cross-section (Q2) of the other second length range (L2).

8. Stator (2) according to one of the preceding claims, characterized in that the respective tempering channel (6) runs within a laminated core (4) of the stator (2).

9. Stator (2) according to claim 8, characterized in that the supply channel (10) is at least partially delimited by the laminated core (4).

10. Electrical machine (1) for a motor vehicle, with a stator (2) according to one of the preceding claims.

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