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

Abstract

The invention relates to a stator (2) for an electrical machine (1), having 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, wherein the temperature control channels (6) are assigned a common supply channel (10) through which the temperature control medium can flow, via which the temperature control channels (6) can be supplied with the temperature control medium, and the second longitudinal regions (L2) differ in terms of their flow cross sections (Q1,Q2) differ from each other.,

Description

The invention relates to a stator for an electric machine, in particular a motor vehicle, according to the preamble of claim 1.DE 10 2018 203 939 A1 discloses a stator for an electric machine. CN102204062 B discloses an electric machine as known. Furthermore, U.S. Pat. No. 8,648,505 B2 discloses an electric machine. Furthermore, a stator for an electric machine is known from JP 5121833 B2.It is the object of the present invention to provide a stator for an electric machine, in particular a motor vehicle, and an electric machine having such a stator, such that particularly advantageous temperature control, i.e. cooling and / or heating of the electric machine, can be realized.This object is achieved according to the invention by a stator having the features of patent claim 1 and by an electric machine having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.A first aspect of the invention relates to a stator for an electric machine, in particular a motor vehicle. This means that the electric machine has the stator in the completely manufactured state. For example, the electric machine in its completely produced state also has a rotor which can be driven, for example, by means of the stator and is thereby rotatable about a machine rotational axis relative to the stator. Thus, for example, the motor vehicle, which is also referred to simply as a vehicle and is preferably designed as a motor vehicle, in particular as a passenger car, has the electric machine in its completely produced state, wherein the motor vehicle can be driven electrically, in particular purely, by means of the electric machine. The motor vehicle is thus preferably a hybrid vehicle or else an electric vehicle, in particular a battery-electric vehicle (BEV). For example, the electric machine can provide drive torques via its rotor for, in particular purely, electric driving of the motor vehicle. The electric machine is very preferably a high-voltage component, the electrical voltage of which, in particular an electrical operating voltage or rated voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and is very preferably several hundred volts.The stator has at least two temperature control channels through which a preferably liquid temperature control medium can flow. Preferably, the temperature control medium is a fluid, in particular a liquid, wherein the temperature control medium can flow through the temperature control channels. Most 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. Via the temperature control channels, the stator can be temperature-controlled by means of the temperature control medium, i.e. cooled and / or heated. 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 region of the stator and the temperature control medium. In order, for example, to cool the stator by means of the temperature control medium, the temperature control medium, for example, has a lower temperature than the aforementioned partial region on its path through the respective temperature control channel, such that heat can transfer from the partial region to the temperature control medium. As a result, at least the partial region can be cooled. In order to heat at least the subregion, for example, the temperature control medium, when it flows through the respective temperature control channel, has a higher temperature than the subregion, such that heat can transfer from the temperature control medium to the subregion. As a result, at least the partial region is heated. For example, the temperature control medium can be an oil. Furthermore, it would be conceivable for the temperature control medium to comprise at least water.The respective temperature control channel has at least two length regions running obliquely or perpendicularly to one another and fluidically connected to one another, namely a respective first length region and a respective second length region. The respective length regions of the respective temperature control channel can thus be flowed through by the temperature control medium. For example, the respective length regions of the respective temperature control channel directly adjoin one another. This is to be understood as meaning that, in the flow direction of the temperature control medium flowing through the respective temperature control channel, which for example during operation of the electric machine flows in the flow direction through the respective temperature control channel, no other, further length region of the respective temperature control channel runs between the respective length regions of the respective temperature control channel. The respective first length region of the respective temperature control channel can be supplied with the temperature control medium via the respective second length region of the respective temperature control channel, such that the respective first length region of the respective temperature control channel is arranged downstream of the respective second length region of the temperature control channel in the flow direction of the temperature control medium flowing through the respective temperature control channel. Viewed in the opposite direction, in the flow direction of the temperature control medium flowing through the respective temperature control channel, the respective second length region of the respective temperature control channel is arranged upstream of the respective first length region of the respective temperature control channel.For example, the respective first length region of the respective temperature control channel runs in the axial direction of the stator, that is to say parallel to the axial direction of the stator, such that, for example, the respective first length 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 rotation axis. It is furthermore conceivable for the respective first length region of the respective temperature control channel to run obliquely to the first plane. Alternatively or additionally, it is conceivable that the respective first length region of the respective temperature control channel extends in a second plane, which extends obliquely or perpendicularly to the first plane. It is conceivable for the second plane to extend in the axial direction of the stator, that is to say parallel to the axial direction of the stator and thus parallel to the machine axis of rotation. The respective second length region of the respective temperature control channel runs, for example, in the radial direction of the stator. For example, the respective second length region of the respective temperature control channel runs obliquely or parallel to the first plane. It is conceivable for the respective second length region to extend obliquely or perpendicularly to the second plane. Since the respective first length region of the respective temperature control channel can be supplied with the temperature control medium from the respective second length region by means of the respective second length region of the respective temperature control channel, the respective second length region is also referred to as a feed or oil feed, in particular when the temperature control medium is an oil. If, for example, the respective second length region runs in the radial direction of the stator, and therefore parallel to the radial direction of the stator, then, for example, the respective second length region of the respective temperature control channel is also referred to as a radial feed or radial oil feed.In order to be able to realize a particularly advantageous temperature control, i.e. cooling and / or heating of the stator, i.e. at least the mentioned partial region of the stator, it is provided according to the invention that the temperature control channels are assigned, in particular exactly, a common supply channel through which the temperature control medium can flow, via which the temperature control channels, in particular both or all, can be supplied with the temperature control medium. Thus, the supply channel is 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 connected, for example, fluidically in series with the supply channel. In particular, it is provided that the respective temperature control channel directly adjoins the supply channel, so that no other, further channel of the stator runs in the flow direction of the temperature control medium flowing through the supply channel and the respective temperature control channel 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 flowing initially through the supply channel can flow out of the supply channel and subsequently flow into the respective temperature control channel and subsequently can flow through the respective temperature control channel. In particular when the respective temperature control channel directly adjoins the supply channel, the respective temperature control channel branches off directly from the supply channel, as it were. Here, it may be advantageous if appropriate to take care of or ensure that, in the case of a central flow or supply of the stator with the temperature control medium, the temperature control medium flows after the supply channel in both axial directions of the stator and not just in one direction.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 rotation axis 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 length region runs obliquely or perpendicularly to the supply channel. This is to be understood in particular to mean that, for example, the respective second length region of the respective temperature control channel runs perpendicular to a respective third plane which, for example, is tangent to the supply channel. It is in particular conceivable for the third plane to extend 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 length regions are spaced apart from one another and follow one another. Furthermore, it is conceivable that the first length regions are spaced apart from one another and follow one another when viewed in the circumferential direction of the stator.Since the respective second length region of the respective temperature control channel is arranged upstream of the respective first length region of the respective temperature control channel and downstream of the supply channel in the flow direction of the temperature control medium flowing through the supply channel and the respective temperature control channel, the respective second length region of the respective temperature control channel is arranged between the respective first length region 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 region of the respective temperature control channel is arranged between the respective first length region of the respective temperature control channel and the supply channel.Furthermore, it is provided according to the invention 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, in particular on its path from the supply channel to and into the first length regions, through the first flow cross section and the second flow cross section. 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. In this way, an advantageous, at least substantially uniform distribution or division of the temperature control medium from the supply channel over the second length regions to the first length regions can be realized, so that a particularly advantageous, in particular at least substantially uniform, temperature control of the stator can be realized. Since the first flow cross section and the second flow cross section differ from one another, the flow cross sections of the second length regions are designed to be assist systems with respect to one another, that is to say different from one another. This makes it possible to avoid an excessive unequal distribution of the temperature control medium from the supply channel to the first length regions. Since the temperature control medium can be supplied or is supplied to the first longitudinal regions from the supply channel via the second longitudinal regions and thus via the flow cross sections of the second longitudinal regions, the first flow cross section and the second flow cross section, and therefore the flow cross sections of the second longitudinal 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, then, for example, 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.It has been shown to be particularly advantageous if the respective second length regions differ from one another with regard to their respective smallest flow cross sections through which the tempering medium can flow. This means that the first flow cross section is the smallest flow cross section of the second length region having the first flow cross section through which the temperature control medium can flow, and that the second flow cross section is the smallest flow cross section of the second length region having the second flow cross section through which the temperature control medium can flow. As a result, the temperature control medium can be divided particularly advantageously into the second length regions, so that a particularly advantageous temperature control, i.e. cooling and / or heating of the stator can be achieved.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 running obliquely or perpendicularly 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 the feed channel is arranged upstream of the feed channel in the flow direction of the temperature control medium flowing through the feed channel, the feed channel and the temperature control channels, so that the feed channel is arranged downstream of the feed channel and upstream of the temperature control channels in the flow direction of the temperature control medium flowing through the feed channel, the feed channel and the temperature control channels. For example, the feed channel runs perpendicular to a fourth plane, which, for example, runs in particular when the feed channel runs in the circumferential direction of the stator, in particular in such a way that the feed channel, as viewed in the first plane running perpendicular to the axial direction of the stator, runs in an arc-shaped, in particular circular, manner tangent to the feed channel. It is conceivable that the fourth plane coincides with one of the third planes. In particular, it is conceivable for the fourth plane to extend in the axial direction of the stator, and therefore to extend parallel to the axial direction of the stator. For example, the fourth plane extends perpendicular to the first plane.In order to realize a particularly advantageous temperature control of the stator, it has proven to be particularly advantageous if, viewed in the circumferential direction of the stator, one of the second length regions is spaced further from the feed duct than the other second length region. As a result, the temperature control medium can be advantageously supplied to the first length regions, so that the stator can be advantageously temperature controlled.In order to divide the temperature control medium from the feed channel and from the supply channel particularly advantageously into the first length regions, in particular in such a way that an at least substantially uniform distribution of the temperature control medium over the first length regions 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 region is smaller than the second flow cross section of the one second length region.The feed channel is also referred to as a global feed or global tempering medium feed. 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 spaced further from the feed channel, i.e. further from the global feed, as viewed in the circumferential direction of the stator than the other second length region, 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, as a result of which a particularly advantageous, in particular at least substantially uniform, distribution of the temperature control medium over the first length regions can be produced. This makes it possible to avoid local overheating and damage to the stator resulting therefrom. Also, excessively low temperatures of the stator can be avoided. As a result, a particularly high performance of the electric machine can be produced.In a further embodiment of the invention, it has been shown to be particularly advantageous if the smallest flow cross section of the other second length region through which the temperature control medium can flow is smaller than the smallest flow cross section of the one second length region through which the temperature control medium can flow. In this way, advantageous different restrictions can be realized by the second length regions, so that a particularly advantageous, in particular at least substantially uniform, distribution or distribution of the temperature control medium from the supply channel to the first length regions can be realized. As a result, the stator can be temperature-controlled, i.e. cooled and / or heated, particularly advantageously, in particular at least substantially uniformly.In order to be able to supply the first length regions with the temperature control medium in a particularly advantageous manner and subsequently to be able to 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, a flow cross section of the other second length region which is larger than the smallest flow cross section of the other second length region and through which the temperature control medium can flow adjoins the smallest flow cross section of the other second length region. Alternatively or additionally, it can be provided that, in particular with respect to the flow direction of the tempering medium flowing through the tempering channels, a flow cross section of the other second length region that is larger than the smallest flow cross section of the other second length region and through which the tempering medium can flow precedes the smallest flow cross section of the other second length region. This means that the other second length region has a further flow cross section in the flow direction of the temperature control medium flowing through the respective temperature control channel downstream and / or upstream of the smallest flow cross section of the other second length region, which is larger than the smallest flow cross section of the other second length region. This allows a particularly advantageous division or distribution of the temperature control medium over the first length regions to be presented.In order to be able to temperature the stator particularly advantageously, it is provided in a further embodiment of the invention that the respective temperature control channel runs, in particular completely, within a laminated core of a stator. In particular, for example, the respective temperature control channel is formed completely circumferentially directly by the laminated core along its respective circumferential direction.The laminated core is composed, for example, of stamped individual sheets, also referred to as sheet metal segments. The temperature control channels and in particular the flow cross sections can be produced in a simple and appropriate manner, in particular by punching the sheet metal segments, so that a particularly advantageous temperature control of the stator can be realized in a particularly simple manner. During production of the laminated core, that is to say during a method for producing the laminated core, which is assembled or assembled from the sheet metal segments during the method and is thus produced, an alignment of the sheet metal 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 method. The alignment of the sheet metal segments relative to one another can be effected, for example, as a function of at least one or more markings with which, for example, the sheet metal segments are or are 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 be produced advantageously 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, as a result of which the laminated core and subsequently the temperature control channels can be produced advantageously.Finally, it has been shown to be 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 to more than half or else 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.It is conceivable for the feed channel to extend, 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 feed channel runs, in particular completely, within a housing of the stator, which housing is formed in particular separately from the laminated core and in the housing of which the laminated core is arranged, for example, at least partially, in particular at least predominantly and thus at least to an extent of more than half or else completely. In particular, it is conceivable for the feed channel to open directly into the supply channel, so that no other, further channel of the stator runs in the flow direction of the temperature control medium flowing through the feed channel and the supply channel between the feed channel and the supply channel.A second aspect of the invention relates to an electric machine for a motor vehicle, wherein the electric machine has at least or exactly one stator according to the first aspect of the invention. Advantages and advantageous configurations of the first aspect of the invention are to be regarded as advantages and advantageous configurations of the second aspect of the invention and vice versa.Further details of the invention will become apparent from the following description of a preferred exemplary embodiment with the associated drawings. In this case, the following shows a schematic and cut-away front view of an electric machine for a motor vehicle; and FIG. 1 shows a detail of a further schematic and sectional front view of the electric machine; FIG. 2 shows a detail of a further schematic and sectional front view of the electric machine; and FIG. 3 shows a detail of a further schematic and cut front view of the electric machine.In the figures, identical or functionally identical elements are provided with identical reference symbols.FIG. 1 shows a schematic and sectional front view of a detail of an electric machine 1 for a motor vehicle. This means that the motor vehicle has the electric machine 1 in its completely produced state and can be driven electrically, in particular purely, by means of the electric machine 1. The electric machine 1 has a stator 2 and a rotor, not shown in detail in the figures, which can be driven by means of the stator 2 and is thereby rotatable about a machine rotation axis 3 relative to the stator 2. The stator 2, the axial direction of which 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 at least in a rotationally fixed manner, with the result that relative rotations between the laminated core 4 and the housing 5 which take place about the machine axis of rotation 3 are prevented. Here, the housing 5 and the laminated core 4 are formed separately from one another and are connected to one another at least in a rotationally fixed manner.It can be seen particularly well from a combination of FIGS. 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 designed, for example, as an oil, can flow. This means that the temperature control medium flows through the temperature control channels 6 in a flow direction during operation of the electric machine 1. It can be seen from FIGS. 1 to 3 that the temperature control channels 6 are spaced apart 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, in particular viewed in pairs. It can also be seen that the respective temperature control channel 6, in particular completely, runs within the laminated core 4. This is to be understood to mean that the respective temperature control channel 6 is preferably to be regarded as a respective channel which runs in particular completely within the laminated core 4.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 winding is carried by the laminated core 4, in particular in that the winding is wound around the laminated core 4. For example, a magnetic field can be generated by means of the winding, by means of which magnetic field the rotor can be driven and can thereby be rotated about the machine rotation axis 3 relative to the stator 2.It can be seen particularly well from FIGS. 2 and 3 that the respective temperature control channel 6 has two length regions running obliquely or in the present case perpendicular to one another and fluidically connected to one another, namely a respective first length region L 1 and a respective second length region L 2. In the exemplary embodiment shown in the figures, the respective length region L 1 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 length region L 2 runs in the radial direction of the stator 2 and thus parallel to the first plane. In other words, the respective second length region L 2 runs perpendicular to a respective second plane which runs perpendicular to the first plane and in this case 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 plane of the drawing of FIG. 1 The radial direction of the stator 2 is illustrated by a double arrow 8 and runs, for example, in the plane of the drawing 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 rotational 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 region L 1 of the respective temperature control channel 6 can be supplied with the temperature control medium via the respective second length region L 2 of the respective temperature control channel 6, such that the respective length region L 2 of the respective temperature control channel 6 is arranged upstream of the respective length region L 1 of the respective temperature control channel 6 in the flow direction of the temperature control medium flowing through the respective temperature control channel 6. In the exemplary embodiment shown in the figures, the respective length regions L 1 and L 2 of the respective temperature control channel 6 are directly adjacent to one another.In order to be able to temperature, i.e. cool and / or heat, the stator 2, i.e. at least a partial region of the stator 2, particularly advantageously, precisely one common supply channel 10 through which the temperature control medium can flow is assigned to the temperature control channels 6, which supply channel is bounded in the present case, for example, inward in the radial direction of the stator 2, in particular directly, by the laminated core 4 and, for example, outward in the radial direction of the stator, in particular directly, by the housing 5, i.e. in particular by an inner-circumferential lateral surface of the housing 5. In particular, it is provided that the supply channel 10, in particular completely, extends outside the laminated core 4. For example, the supply channel 10 is formed by a clearance of the housing 5, which clearance runs completely in particular in the circumferential direction of the stator 2. The length regions L 2 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 the, in particular all, length regions L 2 and thus upstream of the, in particular all, temperature control channels 6. On its way to and into the length regions L 1, the temperature control medium flows initially through the supply channel 10. From the supply channel 10, the temperature control medium can flow out inward in the radial direction of the stator 2 and thus flow in the radial direction of the stator 2 into the respective length region L 2 and consequently flow through the respective length region L 2, in particular in the radial direction of the stator 2. The temperature control medium can flow further out of the respective length region L 2 and into the respective length region L 1 and subsequently flow through the respective length region L 1 axially, i.e. in the axial direction of the stator 2.It can be seen particularly well from FIGS. 3 and 4 that the respective second length region L 2 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 on its path from or out of the supply channel 10 to and into the respective length region L 1 of the respective temperature control channel 6 through the respective smallest flow cross section of the respective second length region L 2 of the respective temperature control channel 6. In FIG. 3, a first of the smallest flow cross sections of the length regions L 2 is denoted by Q 1, and in FIG. 4, a second of the smallest cross sections of the length regions L 2 is denoted by Q 2. The second length region L 2 having the smallest flow cross section Q 1 is one of the second length regions L 2, and the second length region L 2 having the smallest flow cross section Q 2 is another one of the second length regions L 2.The length region L 2 having the smallest flow cross section Q 2 is also referred to as one of the second length regions L 1, and the length region L 2 having the smallest flow cross section Q 1 is also referred to as another one of the second length regions L 2. It can be seen from FIGS. 3 and 4 that the one second longitudinal region L 2 and the other second longitudinal region L 2 thus differ from one another with regard to their respective smallest flow cross sections Q 1 and Q 2 through which the temperature control medium can flow, in the present case in such a way that the smallest flow cross section Q 2 is smaller than the smallest flow cross section Q 1.It can also be seen from FIGS. 3 and 4 that the supply channel 10 is assigned precisely one supply channel 11, also referred to as global supply, through which the tempering medium can flow. The supply channel 10 can be supplied with the tempering medium via the supply channel 11. The feed channel 11 extends perpendicularly or however in the present case obliquely to the feed channel 10.It can also be seen from FIGS. 3 and 4 that, viewed in the circumferential direction of the stator 2, the one second length region having the smallest flow cross section Q 1 is spaced further from the feed duct 11 than the other second length region L 2 having the smallest flow cross section Q 2. The smallest flow cross section Q 2 of the other second length region L 2 is smaller than the smallest flow cross section Q 1 of the one second length region L 2. As a result, the temperature control medium can be divided or distributed from the supply channel 11 and the supply channel 10 particularly advantageously, in particular at least substantially uniformly, to the first longitudinal regions L 1, such that a particularly advantageous, in particular at least substantially uniform, temperature control of the stator 2 can be realized. It can be seen that the flow cross section Q 2 acts as a throttle, in particular as a stronger throttle, compared to the flow cross section Q 1. In other words, the temperature control medium is throttled more strongly on its way to the length regions L 1 by means of the flow cross section Q 2 than by means of the flow cross section Q 1, as a result of which the temperature control medium can be divided particularly advantageously into the length regions L 1.It can be seen from FIGS. 2 and 3 that the laminated core 4 has slots 12 which are arranged in the circumferential direction of the stator 2 in succession and are spaced apart from one another and in particular are at least partially separated from one another and in which respective length regions LB of the mentioned winding are accommodated. It can also be seen that one of the length regions L 1 is arranged in each case, in particular exactly, between two grooves 12 which are directly successive in the circumferential direction of the stator 2 and are thus adjacent to one another, in particular in such a way that the respective grooves 12 which are adjacent to one another in the circumferential direction of the stator 2 and between which the respective, in particular exactly one length region L 1 is arranged form a pair of grooves, and in such a way that one of the respective grooves 12 of the respective pair of grooves is at least partially covered or overlapped, as viewed in the circumferential direction and toward the respective other groove 12 of the respective pair of grooves, by the respective length region L 1 arranged in the circumferential direction between the grooves 12 of the respective pair of grooves. A particularly advantageous temperature control can thereby be ensured. The respective longitudinal region L 1 is a respective channel region close to the groove, through which the tempering medium can flow.In FIG. 4, the flow direction of the temperature control medium flowing through the respective length region L 2 is illustrated by an arrow 13. It can be seen that the temperature control medium flowing through in the flow direction of the length region L 2 having the smallest flow cross section Q 2 adjoins the smallest flow cross section Q 2 a third flow cross section Q 3 of the length region L 2 having the smallest flow cross section Q 2, wherein the flow cross section Q 3 is smaller than the smallest flow cross section Q 2. In addition, the smallest flow cross section Q 2 is preceded by a fourth flow cross section Q 4 of the second length region L 2 having the smallest flow cross section Q 2, wherein the fourth flow cross section Q 4 is larger than the smallest flow cross section Q 2. This allows an advantageous throttling of the temperature control medium to be realized, so that the temperature control medium can be advantageously divided between the length regions L 1.It is conceivable that at least or exactly one of the length regions L 2 has the smallest flow cross section Q 1, or else preferably a plurality of first ones of the length regions L 2 have the flow cross section Q 1. It is further conceivable that at least or exactly one of the length areas L 2 has the flow cross section Q 2, wherein it is preferably provided that a plurality of second length areas L 2 have the flow cross section Q 2. For example, the laminated core 4 has at least two or more regions, as viewed in the circumferential direction of the stator 2, the number of which regions 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 L 2 have the flow cross section Q 1 in at least or exactly one first of the regions, in particular in a plurality of first of the regions, and for example the, in particular all, length regions L 2 have the flow cross section Q 2 at least or exactly one second of the regions, in particular in a plurality of second of the regions. It is conceivable that, viewed in the circumferential direction of the stator 2, the first regions and the second regions alternate. Preferably, the flow cross sections Q 1 are the same. Preferably, the flow cross sections Q2 are the same.List of reference characters1 Electric machine 2 Stator 3 Machine axis of rotation 4 Laminated core 5 Housing 6 Temperature control duct 7 Double arrow 8 Double arrow 9 Double arrow 10 Supply duct 11 Supply duct 12 Groove 13 Arrow L 1 First longitudinal region L 2 Second longitudinal region LB Longitudinal regions Q 1 Flow cross section Q 2 Flow cross section Q 3 Flow cross section Q 4 Flow cross sectionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2018 203 939 A1

[0002] CN102204062 B

[0002] U.S. Pat. No. 8,648,505 B2

[0002] JP 5121833 B2

[0002]

Claims

Stator (2) for an electric machine (1), having at least two temperature control channels (6) which are at least partially separated from one another and through which a temperature control medium can flow, via which the stator (2) can be temperature controlled by means of the temperature control medium, wherein the respective temperature control channel (6) has at least two length regions (L1, L2) which run 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, characterized in that: - the temperature control channels (6) are assigned a common supply channel (10) through which the temperature control medium can flow, via which the temperature control channels (6) can be supplied with the temperature control medium; and - the second longitudinal regions (L2) differ from one another with regard to their flow cross sections (Q1, Q2) through which the tempering medium can flow.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.Stator (2) according to Claim 1 or 2, characterized in that the supply channel (10) is assigned a feed channel (11) which runs obliquely or perpendicularly to the supply channel (10) and through which the tempering medium can flow, via which feed channel the supply channel (10) can be supplied with the tempering medium.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 spaced further from the feed duct (11) than the other second length region (L2).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).Stator (2) according to Claim 5, characterized in that the smallest flow cross section (Q2) of the other second length region (L2) through which the temperature control medium can flow is smaller than the smallest flow cross section (Q1) of the one second length region (L2) through which the temperature control medium can flow.Stator (2) according to Claim 6, characterized in that: - the smallest flow cross section (Q2) of the other second length region (L2) is adjoined by a flow cross section (Q3) of the other second length region (L2) which is larger than the smallest flow cross section (Q2) of the other second length region (L2) through which the temperature control medium can flow; and / or - the smallest flow cross section (Q2) of the other second length region (L2) is preceded by a flow cross section (Q4) of the other second length region (L2) which is larger than the smallest flow cross section (Q2) of the other second length region (L2) through which the temperature control medium can flow.Stator (2) according to one of the preceding claims, characterized in that the respective temperature control channel (6) runs within a laminated core (4) of the stator (2).Stator (2) according to Claim 8, characterized in that the supply channel (10) is at least partially delimited by the laminated core (4).Electric machine (1) for a motor vehicle, having a stator (2) according to one of the preceding claims.

Images