DE102021211917A1 - electrical machine - Google Patents

Abstract

Electrical machine (1), in particular for a motor vehicle, comprising a temperature control device which is designed to convey a temperature control medium through a temperature control channel (6) to control the temperature of at least one section of the electrical machine (1), which electrical machine (1) has two den Temperature control channel (6) has ring guide elements (4, 5) delimiting it in the axial direction, with a first ring guide element (4, 5) being designed to feed the temperature control medium into at least one stator slot (9) of the stator (2) of the electrical machine (1) formed first temperature control channel section (7, 8), wherein a second annular guide element (4, 5) is formed to convey the temperature control medium into at least one second temperature control channel section (7, 8th ) to direct.

Description

The invention relates to an electrical machine, in particular for a motor vehicle, comprising a temperature control device which is designed to convey a temperature control medium through a temperature control channel to control the temperature of at least one section of the electrical machine.

Electrical machines for motor vehicles are known in principle from the prior art, for example DE 10 2017 213 662 A1 , DE 10 2017 112 365 A1 or off U.S. 2019 229 566 A1 known electrical machines with cooling devices. Such electrical machines have a stator, which can be divided into a stator space and a rotor space, for example. The stator slots, in which the individual conductors, which are also called "hairpins", are housed, are located in the stator space, while the rotor is arranged in the rotor space. A so-called air gap is formed between the rotor and the stator, for example the tips of the teeth of the stator slots and the rotor rotating or rotatably mounted in the rotor chamber. In order to separate the rotor space from the stator space, for example to isolate the rotor space from the stator space, a can can be used, for example. The can thus bears on the inside of the stator space and separates the rotor space from the stator space in the radial direction, so that there is no connection between the stator slots and the rotor space.

When cooling the electrical machine, cooling devices are usually used which have a jacket around the stator, so that coolant can be conveyed between the jacket and a stator base body in order to dissipate heat from the stator base body of the electrical machine. In this case, long distances are required for the paths along which heat is dissipated, since cooling is ultimately carried out "from the outside". In addition, it is known to operate the electrical machine completely wet, which means that both the rotor space and the stator space can be filled with coolant or oil. Herein lies the disadvantage that the rotating rotor accelerates the coolant and thus losses occur in the movement of the rotor in the coolant.

The invention is based on the object of specifying an electrical machine that is improved in comparison thereto, in which, in particular, temperature control of the electrical machine is possible in an improved manner.

The object is achieved by an electrical machine having the features of claim 1. Advantageous configurations are the subject matter of the dependent claims.

As described, the invention relates to an electrical machine, in particular an electrical machine for a motor vehicle. The electric machine can be designed in particular as a traction drive for the motor vehicle, i.e. the electric machine can generate torque that is used to drive the motor vehicle. As described above, the temperature control device of the electrical machine has a temperature control channel through which the temperature control medium can be conveyed. The invention is based on the finding that the electrical machine has two ring guide elements that delimit the temperature control channel in the axial direction, with a first ring guide element being designed to conduct the temperature control medium into a first temperature control channel section formed in at least one stator slot of the stator of the electric machine, with a second Ring conducting element is designed to conduct the temperature control medium in at least one second temperature control channel section formed in a stator yoke of the stator of the electrical machine.

The invention thus proposes two ring guide elements that can be connected to a stator base body of the stator in the axial direction. The basic stator body has at least one stator slot, in particular a large number of stator slots, ie those slots into which the conductors of the electrical machine are laid or introduced. The stator base body has, in particular, a multiplicity of stator slots which are arranged in the circumferential direction on an inner side of the stator base body and extend in the axial direction. Furthermore, the stator base body has a stator yoke. The stator yoke is arranged at a greater radial position than the stator slots. In other words, the stator yoke is arranged radially further outward than the stator slots. As described, the first tempering channel section is formed in the area of the stator slots. In particular, each stator slot has a first tempering channel section, which runs at least in sections within the stator slots. In particular, each of the stator slots can be used as the first tempering channel section. The second tempering channel sections are located in the stator yoke of the stator.

As described, the temperature control channel can thus have any number of first temperature control channel sections, which in particular corresponds to the number of stator slots of the stator, and have any number of second temperature control channel sections, which guide the temperature control medium through the stator yoke. In particular, exactly as many first tempering channel sections can be provided as there are stator slots in the stator base body points. The number of second temperature control channel sections can be matched to the number of first temperature control channel sections, so that each first temperature control channel section opens into a second temperature control channel section or is connected to such. In particular, the supply and discharge of the temperature control medium can thus take place via the ring guide elements, in which case the ring guide elements can ultimately be arranged on the axial end surfaces of the stator base body and can connect the temperature control channel sections to one another. The temperature control channel sections are aligned in particular in the axial direction, with the ring guide elements being able to guide the temperature control medium both in the axial direction and in the radial direction. In particular, the second ring guide element can connect the first temperature control channel sections to the second temperature control channel sections.

According to a development of the electrical machine, it can be provided that the first annular duct element has a first separating element in a first annular space of the first annular duct element and/or the second annular duct element has a second separating element in a second annular space of the second annular duct element, with the first separating element having the first annular space into a first outer and a first inner annular space and the second separating element separates the second annular space into a second outer and a second inner annular space, wherein the at least one first temperature control channel section divides the first inner annular space with the second inner annular space and the second temperature control channel section separates the first outer Annulus connects to the second outer annulus. Separating elements are thus provided within the ring guide elements, which divide or separate the respective annular space. The separating elements bring about a geometric or spatial division of the annular space into an inner annular space and an outer annular space. In other words, the separating elements bring about a radial division of the respective annular space. The division of the annular spaces into inner annular spaces and outer annular spaces enables the temperature control medium to be guided in a defined manner through the electrical machine, in particular through the annular conducting elements and the stator base body.

In this case, the temperature control device can be designed in particular to transfer temperature control medium from the first inner annular space through the at least one first temperature control channel section into the second inner annular space and from the second inner annular space into the second outer annular space and from the second outer annular space through the at least one second temperature control channel section into to promote the first outer annulus or vice versa. The direction of flow depends on the arrangement of the inlet and outlet. In principle, the arrangement of the inlet and outlet can be chosen arbitrarily. For example, the inlet can be assigned to the first inner annular space and the outlet can be assigned to the second outer annular space.

It is thus possible for the first inner annular space, that is to say the radially inner area of the first annular guide element, which is located radially inside the first separating element, to be used for the inflow of the temperature control medium. Starting from the first inner annular space, the temperature control medium can be supplied to the first temperature control channel sections or to the at least one first temperature control channel section. The temperature control medium can thus flow through the stator base body through the first temperature control channel sections in the axial direction and flow out of the first temperature control channel sections into the second inner annular space.

As previously described, the second inner annulus is the radially inner region radially inward of the second separator in the second annulus. The temperature control medium can flow from the second annular space, in particular through openings in the second separating element, into the second outer annular space. Here, as can be seen, the temperature control medium is deflected in the radial direction into the second outer annular space. The temperature control medium can flow from the second outer annular space through the second temperature control channel sections to the first outer annular space. The direction of flow of the temperature control medium in the first temperature control channel section and the second temperature control channel section is therefore opposite. The temperature control medium can flow out through the outlet from the second outer annular space.

The electrical machine can also be further developed such that at least one throttle element is formed in the first and/or second separating element, which restricts the flow cross section through the first or second separating element. As described, the separating elements are arranged in the annular spaces of the ring guide elements, which adjoin the stator base body in the axial direction. The annular spaces thus form a collection point for the temperature control medium which flows out of the temperature control channel sections or before the temperature control medium flows into the temperature control channel sections.

The at least one throttle element forms a way of influencing or specifically setting the pressure distribution within the temperature control channel. In particular, the tempering channel sections on the inlet side can thus be reliably filled or remain filled. Furthermore, a pressure equalization and a homogenization of the distribution of the pressure and the temperature control medium can be achieved. If the temperature control medium flows, for example, first through the first temperature control channel sections, which are formed in the stator slots, and then through the throttle elements in the second separating element, before the temperature control medium flows into the second temperature control channel sections, irregularities in the first temperature control channel sections can be compensated for by the at least one throttle element.

If, for example, conductors are accommodated in the first tempering channel sections, i.e. accommodated in the stator slots, a different flow through the individual stator slots will occur due to the geometry or the individual interconnection of the individual conductors. Since the at least one throttle element causes the temperature control medium to build up in the second inner annular space, the different individual flow cross sections are compensated for by the stator slots and thus both the flow through the individual stator slots and the heat conduction or heat dissipation are homogenized.

In the first or the second separating element, a plurality of throttle elements can be distributed, in particular uniformly, in the circumferential direction. This ensures that the individual temperature control channel sections are filled evenly and the temperature control medium flows through them and the flow through the individual temperature control channel sections is not dependent on or influenced by the arrangement of the conductors and the like in the stator slots. The number of throttle elements can in particular correspond to the number of temperature control channel sections, so that each first temperature control channel section outputs temperature control medium, which can flow through a throttle element into the associated second temperature control channel section.

According to a further configuration of the electrical machine, at least one conducting element which is arranged in the at least one stator slot and is closed in particular in the circumferential direction and which connects the first ring conducting element to the second ring conducting element can be provided. The guide element can also be referred to as a connecting element or hose element. The guide element is, for example, tubular or line-shaped and can be introduced into the at least one stator slot.

In particular, it can be provided that each stator slot has such a guide element that connects the corresponding sections of the first ring guide element to the second ring guide element. In particular, a large number of guide elements can thus be provided, with one guide element being provided in each stator slot. Each guide element thus forms or delimits one of the first tempering channel sections and connects the first annular guide element to the second annular guide element. Since the guide elements are designed to be closed, in particular in the circumferential direction, the guide elements simultaneously insulate or seal the tempering channel sections from the stator slot.

The first and second ring guide element can be segmented, in particular by wall segments, into ring segments that are delimited from one another in the circumferential direction. The individual ring segments thus form components of the ring guide elements, which are arranged in the circumferential direction in the form of chambers or pockets and thus form the ring guide elements. In other words, each ring guide element can have a plurality of ring segments arranged next to one another in the circumferential direction, which ring segments are delimited from one another, in particular by wall segments. In particular, this allows the temperature control medium to be distributed from the inlet to the individual ring segments.

A first temperature control channel section can be assigned to each ring segment of the first ring guide element, so that temperature control medium that flows into a ring segment can then flow through the associated temperature control channel section connected to the ring segment, in particular through a guide element. The temperature control medium can then flow out of the corresponding first temperature control channel section into the second ring guide element, also into a ring segment. The corresponding ring segment of the second ring guide element is in turn connected to a second temperature control channel section. Consequently, each first temperature control channel section and each second temperature control channel section, which are in particular connected to one another, can be assigned a respective ring segment in the ring guide elements.

At least one deflection section can be provided in the ring guide elements described, i.e. in the first ring guide element and/or in the second ring guide element, in particular their ring segments. Alternatively, the first ring guide element and/or the second ring guide element can have at least one deflection section. The deflection section is designed to deflect temperature control medium flowing through the annular guide element, in particular by 90°. Depending on how the temperature control medium flows into the ring guide element, a deflection of the temperature control medium is necessary for guiding the temperature control medium in the temperature control channel.

For example, an inflow into a ring guide element can take place axially, with the deflection section deflecting the temperature control medium into the ring segments or out of the ring segments into the temperature control channel sections.

It is also possible to arrange two deflection sections one behind the other in a ring segment. For example, the second ring guide element can have ring segments, which have two deflection sections arranged one behind the other and thus deflect temperature control medium flowing out of the first temperature control channel sections by 180°, so that the temperature control medium, after leaving the second ring guide element, has the second temperature control channel sections in the opposite direction with respect to the direction of flow in the first temperature control channel sections flows through.

In addition, the invention relates to a stator base body for an electrical machine, in particular an electrical machine described above, in particular for a motor vehicle, comprising a temperature control channel, which stator base body has two ring guide elements that delimit the temperature control channel in the axial direction, with a first ring guide element being designed to direct the temperature control medium into a first temperature control channel section formed in at least one stator groove of the stator base body, with a second annular guide element being formed to conduct the temperature control medium into at least one second temperature control channel section formed in a stator yoke of the stator base body. Furthermore, the invention relates to a motor vehicle, comprising an electric machine as described above.

• - Bereitstellen eines Stators, umfassend Statornuten;
• - Einbringen von Leitelementen in die Statornuten;
• - Einbringen der Leiter in die Leitelemente;
• - Anordnen von Ringleitelementen an den axialen Endflächen des Stators;
• - Einbringen des teilmontierten Stators in ein Gehäuse.

Furthermore, the invention relates to a method for assembling an electrical machine, in particular an electrical machine for a motor vehicle, comprising a temperature control device which is designed to convey a temperature control medium through a temperature control channel to control the temperature of at least one section of the electrical machine, comprising the steps:

• - providing a stator comprising stator slots;
• - Introducing guide elements into the stator slots;
• - Introducing the conductors into the guiding elements;
• - Arranging ring guide elements on the axial end faces of the stator;
• - Introducing the partially assembled stator into a housing.

According to the assembly method described, a stator, in particular a stator base body, is provided which has stator slots. Guide elements can be introduced into the stator slots, for example hose-like or tube-like guide elements which have closed profiles in the circumferential direction. The guide elements can thus seal off or insulate the stator slots or the interior of the stator slots from the inner surfaces of the stator slots. Conductors can be introduced into said conducting elements, i.e. electrical conductors, which can also be referred to as “hairpins”.

Ring guide elements can then be arranged on the stator base body of the described stator, in particular on the axial end faces of the stator base body. The partially assembled stator can then be inserted into a housing of an electrical machine. Further components of the electrical machine can then be installed.

All the advantages, details and features that have been described in relation to the electric machine can be fully transferred to the motor vehicle, the stator base body and the method.

• 1 eine schematische Darstellung einer elektrischen Maschine;
• 2 eine Schnittdarstellung der elektrischen Maschine von 1;
• 3 einen Ausschnitt der Schnittdarstellung der elektrischen Maschine von 1, 2;
• 4 einen Ausschnitt einer axialen Ansicht eines ersten Ringleitelements der elektrischen Maschine von 1-3;
• 5 einen Ausschnitt einer axialen Ansicht eines zweiten Ringleitelements der elektrischen Maschine von 1-3; und
• 6 eine schematische Explosionsdarstellung mit Leitelementen der elektrischen Maschinen von 1-3.

The invention is explained below using exemplary embodiments with reference to the figures. The figures are schematic representations and show:

• 1 a schematic representation of an electrical machine;
• 2 a sectional view of the electrical machine from 1 ;
• 3 a section of the sectional view of the electrical machine from 1 , 2 ;
• 4 a detail of an axial view of a first annular guide element of the electrical machine 1-3 ;
• 5 a detail of an axial view of a second ring guide element of the electrical machine 1-3 ; and
• 6 a schematic exploded view with guide elements of the electrical machines from 1-3 .

1 , 2 show an electric machine 1 for a motor vehicle, not shown in detail. The electrical machine 1 has a stator 2 with a stator base body 3 . A first ring guide element 4 and a second ring guide element 5 adjoin the stator base body 3 in the axial direction. Basically, within the scope of this description, the terms “first” and “second” can be arbitrarily exchanged or the description can be transferred accordingly.

The electrical machine 1 has a temperature control channel 6 in the stator base body 3 , which in this exemplary embodiment has a plurality of first temperature control channel sections 7 and a plurality of second temperature control channel sections 8 . The first tempering channel sections 7 each extend through stator slots 9 in the stator base body 3 . The second tempering channel sections 8 are designed as channels in a stator yoke of the stator base body 3 . The stator yoke designates the area of the stator base body 2 that lies radially on the outside, on which in particular a laminated core is arranged. In principle, the first tempering channel sections 7 can thus run in the stator slots 9 , for example tempering medium can flow around conductors which are arranged in the stator slots 9 . The second tempering channel sections 8 extend through the stator yoke, it being possible for the flow direction in the first tempering channel sections 7 and the second tempering channel sections 8 to be directed in opposite directions.

According to one exemplary embodiment, guide elements 10 can be provided which connect the first ring guide element 4 to the second ring guide element 5 . The guide elements 10, which can be seen, for example, in a section of an exploded view in 6 are shown can be placed in the stator slots 7 and thus delimit the first tempering channel sections 7 . In particular, the guide elements 10 can have a closed shape in the circumferential direction. For example, the guide elements 10 are designed in the manner of a hose or tube and thus have a closed profile that connects the two ring guide elements 4, 5 to one another. In other words, temperature control medium can flow from the first annular guide element 4 into the guide elements 10 and from the guide elements 10 into the second annular guide element 5 .

The ring guide elements 4 , 5 can also have separating elements 11 , 12 , in particular the first ring guide element 4 has a first separating element 11 and the second ring guide element 5 has a second separating element 12 . The separating elements 11, 12 separate the annular spaces, ie the inner volume of the ring guide elements 4, 5 radially. The separating element 11 can in particular divide the first annular space of the first annular guide element 4 into a first inner annular space 13 and a first outer annular space 14 . Analogously, the second separating element 12 can separate or divide the second annular space of the second annular guide element 5 into a second inner annular space 15 and a second outer annular space 16 .

The first separating element 11 and the second separating element 12 or only one of the two separating elements 11, 12, in particular the second separating element 12, can have throttle elements 17, in particular throttle elements 17 distributed uniformly in the circumferential direction. The throttle elements 17 are designed to allow a flow through the respective separating element 11, 12 to limit. In particular, a pressure drop at the respective separating element 11, 12 can thus be adjusted. In this case, it can be provided in particular that the temperature control medium is backed up on the separating element 11, 12, which has the throttle elements 17, so that the temperature control channel section 7, 8 in front remains reliably filled.

In 3 a section of the electrical machine 1 is shown in order to clarify the fluid routing of the temperature control medium in the electrical machine 1 . The electrical machine 1 has an inlet 18 in the first ring guide element 4 . Temperature control medium can thus flow through the inlet 18 into the first annular guide element 4, in particular into a first outer annular space 14. The temperature control medium can penetrate the first separating element 11 from the first outer annular space 14, for example through openings or throttle elements 17 in the first separating element 11 and thus flow into the first inner annular space 13 . A deflection section 19 is arranged in the first inner annular space 13, which is designed to align the flow direction from the radial direction in which the temperature control medium has flowed into the annular guide element 4 in the axial direction, so that the temperature control medium can flow into the first temperature control channel sections 7. As already described, the first temperature control channel sections 7 can be arranged in guide elements 10 or the temperature control medium can be guided through the guide elements 10 along the first temperature control channel sections 7 .

As already described, the second ring guide element 5 is arranged at the opposite end of the stator base body 2 . The second ring guide element 5 has two deflection sections 19 which deflect the temperature control medium by a total of 180°. The temperature control medium first flows through the second inner annular space 15 through the second separating element 12, in particular the throttle elements 17 in the second separating element 12, into the second outer annular space 16 and from there through the second temperature control channel sections 8 in the stator yoke of the stator base body 2 into an outlet 20

4 , 5 show a section of an axial view of the ring guide elements 4, 5. In particular 4 the section of the first ring guide element 4 and 5 shows the section of the second ring guide element 5. The ring guide elements 4, 5 are divided into individual ring segments 21 by wall segments. Here, the individual ring segments 21 can form chambers of the ring guide elements 4, 5, which adjoin one another in the circumferential direction connect. In particular, such a ring segment 21 can be associated with each stator slot 9 or each first temperature control channel section 7 and each second temperature control channel section 8 . It can thus be ensured that the fill level and the pressure profile in the individual temperature control channel sections 7 remain as constant as possible, so that heat dissipation and a flow rate of the temperature control medium via the electrical machine 1 are as homogeneous as possible. The arrangement of the throttle elements 17 in the second ring guide element 5 also ensures that the temperature control medium can flow back through the second temperature control channel sections 8 almost without pressure.

Out of 4 , 5 it can also be seen that in the first annular guide element 4 the temperature control medium flows from the first outer annular space 14 through throttle elements 17 into the first inner annular space 13 . The flow is divided into individual ring segments 21 from which the temperature control medium flows into the individual first temperature control channel sections 7 , in particular into guide elements 10 which delimit the first temperature control channel sections 7 . In 5 shows how the temperature control medium flows out of the first temperature control channel sections 7, in particular out of the guide elements 10, and out of the second inner annular space 15 into the second outer annular space 16, namely through the throttle elements 17. The second ring guide element 5 also has ring segments 21 which are assigned to the individual first tempering channel sections 7 . The tempering medium then flows from the second outer annular space 16, which is also divided into annular segments 21, into the second tempering channel sections 8 and thus to the outlet 20, as previously described.

As previously described, shows 6 a section of an exploded view, in which the guide elements 10 are shown outside of the stator base body 2 only for clarity. The guide elements 10 are accommodated within the stator slots 9 during operation and thus insulate the inner surfaces of the stator slots 9 from the first temperature control channel sections 7. The guide elements 10 also ensure that the temperature control medium cannot leave the first temperature control channel sections 7. Ultimately, the sealing surfaces for the temperature control channel 4 are therefore reduced to the connections between the ring guide elements 4, 5 and the guide elements 10.

The advantages, details and features shown in the individual representations can be transferred to one another, combined with one another and interchanged with one another.

Reference List

1

electric machine

2

stator

3

stator body

4, 5

ring guide element

6

tempering channel

7, 8

tempering channel section

9

stator slot

10

guiding element

11, 12

separator

13

first inner annulus

14

first outer annulus

15

second inner annulus

16

second outer annulus

17

throttle element

18

Intake

19

deflection section

20

Sequence

21

ring segment

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102017213662 A1 [0002]
• DE 102017112365 A1 [0002]
• US2019229566A1 [0002]

Claims (11)

Electrical machine (1), in particular for a motor vehicle, comprising a temperature control device which is designed to convey a temperature control medium through a temperature control channel (6) to control the temperature of at least one section of the electrical machine (1), characterized by two the temperature control channel (6) Ring guide elements (4, 5) that delimit in the axial direction, a first ring guide element (4, 5) being designed to feed the temperature control medium into a first temperature control channel section (7 , 8), wherein a second annular conducting element (4, 5) is designed to conduct the temperature control medium into at least one second temperature control channel section (7, 8) formed in a stator yoke of the stator (2) of the electrical machine (1). Electrical machine (1) according to claim 1 , characterized in that the first annular guide element (4) has a first separating element (11) in a first annular space of the first annular guide element (4) and/or the second annular guide element (5) has a second separating element (12) in a second annular space of the second annular guide element (5), wherein the first separating element (11) separates the first annulus into a first outer and a first inner annulus (13, 14) and the second separating element (12) separates the second annulus into a second outer and a second inner annulus ( 15, 16), the at least one first temperature control channel section (7) separating the first inner annular space (13) with the second inner annular space (15) and the second temperature control channel section (8) separating the first outer annular space (14) with the second outer annular space ( 16) connects. Electrical machine (1) according to claim 2 , characterized in that the temperature control device is designed to transfer temperature control medium from the first inner annular space (13) through the at least one first temperature control channel section (7) into the second inner annular space (15) and from the second inner annular space (15) into the second outer Annular space (16) and promote from the second outer annular space (16) through the at least one second tempering channel section (8) in the first outer annular space (14) or vice versa. Electrical machine (1) according to one of the preceding claims, characterized in that at least one throttle element (17) is formed in the first and/or second separating element (11, 12) and limits the flow cross-section through the first or second separating element (17). . Electrical machine (1) according to one of the preceding claims, characterized in that a plurality of throttle elements (17) are arranged in the first or second separating element (11, 12), in particular distributed uniformly in the circumferential direction. Electrical machine (1) according to one of the preceding claims, characterized by at least one guide element (10) which is arranged in the at least one stator slot (9) and is in particular closed in the circumferential direction and which connects the first annular guide element (4) to the second annular guide element (5). . Electrical machine (1) according to one of the preceding claims, characterized in that the first and second ring guide element (4, 5) are segmented, in particular by wall segments, into ring segments (21) which are delimited from one another in the circumferential direction. Electrical machine (1) according to one of the preceding claims, characterized in that the first ring guide element (4) and/or the second ring guide element (5), in particular in the ring segments (21), have at least one deflection section (19) which is designed for this purpose is to deflect the temperature control medium flowing through the ring guide element (4, 5), in particular by 90°. Motor vehicle comprising an electric machine (1) according to one of the preceding claims. Stator base body (3) for an electrical machine (1), in particular for a motor vehicle, comprising a temperature control channel (6), characterized by two ring guide elements (4, 5) delimiting the temperature control channel (6) in the axial direction, with a first ring guide element (4, 5 ) is designed to direct the temperature control medium into a first temperature control channel section (7, 8) formed in at least one stator slot (9) of the stator base body (3), a second annular guide element (4, 5) being designed to direct the temperature control medium into at least one in a stator yoke of the stator base body (3) formed second temperature control channel section (7, 8). Method for assembling an electrical machine (1), in particular an electrical machine (1) for a motor vehicle, comprising a temperature control device which is designed to supply a temperature control medium through a temperature control channel (6) to control the temperature of at least one section of the electrical machine (1). promote, characterized by the steps of: - providing a stator (2) comprising stator slots (9); - Introducing guide elements into the stator slots (9); - Introducing the conductors into the guiding elements (10); - Arranging ring guide elements (4, 5) on the axial end faces of the stator (2); - Introduction of the partially assembled stator (2) in a housing.

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