Electric machine having fastening clip for thermally coupling temperature sensor to stator winding

Abstract

The invention relates to an electric machine (1) comprising a stator (6, 6a), comprising a laminated stator core (7, 7a) and a stator winding (8, 8a) arranged in the laminated stator core (7, 7a). Furthermore, the electric machine (1) comprises a temperature sensor (13, 13a) thermally conductively coupled to the stator winding (8, 8a) and configured to measure a temperature of the stator winding (8, 8a). The thermally conductive coupling is produced by a fastening clip (14, 14a, 14b) having a latching connection (30), wherein the fastening clip (14, 14a, 14b) presses the temperature sensor (13, 13a) against the stator winding (8, 8a) or a thermally conductive element (16, 16a) connected to the stator winding in a thermally conductive manner. The invention further relates to a vehicle (32) having such an electric machine (1) and to a method for producing a thermally conductive coupling between a temperature sensor (13, 13a, 13c) of an electric machine (1) and a stator winding (8, 8a) or a thermally conductive element (16, 16a), which is connected to the stator winding in a thermally conductive manner.

Description

Field of the Invention

[0001] The present invention relates to an electric machine including a stator, the stator including a stator lamination core having a plurality of stator laminations axially stacked on top of each other and a stator winding arranged in the stator lamination core. Furthermore, the electric machine includes a temperature sensor thermally coupled to the stator winding and configured to measure the temperature of the stator winding. Furthermore, the present invention relates to a vehicle having such an electric machine and also to a method for creating a thermal coupling between the temperature sensor of the electric machine and the stator winding or a thermal element, the thermal element being thermally connected to the stator winding. Background Art

[0002] Such an electric machine, such a vehicle, and such a method are in principle known from the prior art. The problem here is that known solutions for creating a thermal coupling between the temperature sensor of the electric machine and the stator winding are sometimes cumbersome, difficult to reproduce, and / or difficult to maintain. For example, it is known to use a thermally conductive adhesive to bond the temperature sensor to the stator winding. The problems here are in particular the correct application of the adhesive, which should not reach other points of the electric machine in an uncontrolled manner, and the fixing of the temperature sensor until the adhesive has cured. These processes cannot be reproduced or can only be reproduced with a high level of technical effort within strict tolerances. Mounting the temperature sensor on the stator winding also takes a relatively long time. Finally, if the temperature sensor fails, it is not easy to replace. In particular, there is a high risk of damaging the insulation of the stator winding here. Summary of the Invention

[0003] Accordingly, it is an object of the present invention to provide an improved electric machine, an improved vehicle, and an improved method for creating a thermal coupling between the temperature sensor of the electric machine and the stator winding. In particular, the thermal coupling between the temperature sensor of the electric machine and the stator winding should be able to be established quickly and the process should be reliable. Furthermore, it should also be possible to easily replace the temperature sensor, in particular without damaging the insulation of the stator winding.

[0004] The object of the present invention is achieved by an electric machine of the type mentioned at the beginning, wherein the thermal coupling between the temperature sensor and the stator winding is created by a fastening clip having a latching connection, and the fastening clip presses the temperature sensor against the stator winding or a thermal element thermally connected to the stator winding.

[0005] Furthermore, the object of the present invention is achieved by a vehicle having such an electric machine, the electric machine being provided for driving the vehicle.

[0006] Finally, the object of the present invention is achieved by a method for creating a thermal coupling between the temperature sensor of an electric machine (in particular an electric machine of the type mentioned above) and the stator winding or a thermal element, the thermal element being thermally connected to the stator winding, the method including the following steps:

[0007] - Arrange the temperature sensor and the stator winding or the heat conducting element in a fastening clip, and

[0008] - By closing the fastening clip, create a thermally conductive coupling between the temperature sensor and the stator winding or the heat conducting element, wherein the latch connection of the fastening clip latches, and wherein the fastening clip presses the temperature sensor against the stator winding or the heat conducting element.

[0009] The proposed measures allow for a rapid establishment of a thermally conductive coupling between the temperature sensor and the stator winding of the electric machine and are process-reliable. Advantageously, the fastening clip can be opened again after closing without being damaged, so that the coupling between the temperature sensor and the stator winding can be released. This allows the temperature sensor to be easily replaced without damaging the insulation of the stator winding during the process. However, it is also conceivable that the fastening clip cannot be opened again without being destroyed after closing, so that the thermal coupling between the temperature sensor and the stator winding cannot be released or cannot be released without being destroyed, for example if this is not planned or necessary after commissioning the electric machine.

[0010] The term "thermally conductive coupling between the temperature sensor and the stator winding" particularly refers to heat exchange between the stator winding and the temperature sensor by heat conduction, and to the extent that heat exchange by radiation or convection, if any, is negligible. In particular, the proportion of the heat transferred between the stator winding and the temperature sensor by heat conduction is greater than 95% of the total amount of heat transferred between the stator winding and the temperature sensor. The term "thermally conductive connection" can also be used as a synonym instead of "thermally conductive coupling".

[0011] The temperature sensor can be directly connected to the stator winding. The thermally conductive connection is then "direct". However, one or more heat conducting elements for achieving heat conduction can also be arranged between the stator winding and the temperature sensor. The thermally conductive connection is then "indirect".

[0012] The heat conducting element can also be designed as a "bus bar". In particular when the heat conducting element has a mechanical support function, this can also be interpreted as a "sensor carrier" and so named. Equivalent terms for "fastening clip" are in particular also "fastening clamp".

[0013] When considered in conjunction with the appended Figure 1 Further advantageous refinements and developments of the invention can be derived from the dependent claims and the description.

[0014] Advantageously, the ends of individual parts of the stator winding of the electric machine or the ends of individual stator windings are electrically connected to a connector that extends annularly or arcuately around the stator axis of the stator, and

[0015] - The heat conducting element is formed by or included in the connector.

[0016] For example, in this case, the stator winding can be constituted by "U-shaped pins", the free ends of which are electrically connected to the connector. However, the connector not only has an electrical function but also serves as a heat-conducting element between the temperature sensor and the stator winding. The connector thus has a dual function, and in this case, the heat-conducting connection between the stator winding and the temperature sensor is thus "indirect". In particular, the connector can form the electrical star point of the electric machine.

[0017] Particularly advantageously, the heat-conducting element has an extension to which the fastening clip is fastened. This allows the heat-conducting coupling between the temperature sensor and the heat-conducting element to be produced particularly easily. The connector can be integrally formed with the extension. As an alternative, the extension can be fastened as a separate part on the base part of the connector. The extension preferably extends axially, but can also extend radially or axially and radially.

[0018] Furthermore, particularly advantageously, the contact pressure produced by the fastening clip (in the closed state) is in the range of 10 N ≤ F ≤ 40 N. This ensures good heat transfer to the temperature sensor even when vibrations occur during the operation of the electric machine. In addition, the temperature sensor is not subjected to excessive mechanical loads here, and the fastening clip can be easily closed by hand. The specified contact pressure is particularly relevant to the new state of the fastening clip. Over time, this contact pressure decreases due to settlement and material creepage.

[0019] In another advantageous design variant of the electric machine, the fastening clip has a projection that projects into a recess in the stator winding or the heat-conducting element, or the fastening clip has a recess into which a projection of the stator winding or the heat-conducting element projects. This can result in better fixation of the heat-conducting element in the fastening clip, for example, axial fixation. For example, the recess in the stator winding or the heat-conducting element can be made with a chisel or a center punch. The resulting material upset area advantageously has no fastening clip in order to rule out any negative influence on the contact pressure.

[0020] Advantageously, the fastening clip has a guide for the heat-conducting element. This makes it easier to mount the fastening clip on the heat-conducting element. For example, the guide can include laterally arranged protrusions or pins.

[0021] Advantageously, the temperature sensor is loosely arranged in a recess in the fastening clip, for example, before the temperature sensor and the fastening clip are fastened to the stator winding or the heat-conducting element. This allows the temperature sensor to be connected to the fastening clip very quickly. However, it is also advantageous for the temperature sensor to be fastened to the fastening clip. This prevents the temperature sensor from accidentally detaching from the fastening clip during the installation process.

[0022] Advantageously, the cable of the temperature sensor is guided through an opening in the fastening clip, where the opening is smaller than the length of the temperature sensor measured transversely to the longitudinal length of the cable or a heat shrink tube mounted on the cable. This allows the temperature sensor to be fixed particularly well in the fastening clip. Due to the elasticity of the heat shrink tube, which also covers at least a part of the temperature sensor, the thermal conduction coupling between the temperature sensor and the stator winding or the heat conducting element can be additionally strengthened.

[0023] Furthermore, advantageously, an elastic element is arranged between the temperature sensor and the fastening clip and / or between the stator winding or the heat conducting element and the fastening clip. For example, the elastic element can be made of silicone resin and can also be used to better compensate for manufacturing tolerances. In particular, the elastic element can be designed such that it enhances the thermal conduction coupling between the temperature sensor and the stator winding or the heat conducting element.

[0024] In one embodiment, the fastening clip is configured as multi-piece. This makes it easier to install the fastening clip in certain cases, for example when the fastening clip has to be installed in a hard-to-reach location.

[0025] In another embodiment, the fastening clip is configured as a single piece. This makes the production of the fastening clip particularly cost-effective. In addition, the individual parts of the fastening clip are not lost, which increases the process reliability when installing the fastening clip.

[0026] Two parts of the fastening clip, which can pivot relative to each other, are optionally connected to each other via a joint. For example, the joint can be formed by a thin plastic web.

[0027] Advantageously, the fastening clip contains plastic, in particular polyphenylene sulfide. This enables easy production, for example by an injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Exemplary embodiments of the invention are shown by way of example in the drawings. In the drawings:

[0029] Figure 1 A semi-sectional view of an exemplary electric motor is shown;

[0030] Figure 2 A perspective view of a detailed exemplary embodiment of an exemplary stator is shown;

[0031] Figure 3 A perspective view of an exemplary fastening clip in an unmounted state is shown;

[0032] Figure 4 Shows Figure 3 the fastening clip into which the temperature sensor is inserted;

[0033] Figure 5 Shows Figure 3 and Figure 4a fastening clip into which a heat-conducting element is additionally inserted;

[0034] Figure 6 shows the fastening clip in the closed state Figures 3 to 5 of the fastening clip;

[0035] Figure 7 shows Figure 5 a side view of the fastening clip, and

[0036] Figure 8 shows an exemplary vehicle having an electric motor of the proposed type. Detailed Description

[0037] It is pointed out by way of introduction that the same components in different embodiments have the same reference numerals or the same component names, with different numerals where appropriate. In the description, the disclosure of a component can be transferred accordingly to another component having the same reference numeral or the same component name. Furthermore, the positional terms selected in the description, such as "top", "bottom", "rear", "front", "side", etc. are related to the directly described and illustrated figures, and in the case of a change in position, should be transferred accordingly to the new position.

[0038] Figure 1 shows a semi-sectional view of the schematically illustrated electric motor 1 having a multi-piece motor housing 2 which includes a stator housing 3, a front end plate 4 and a rear end plate 5. Furthermore, the electric motor 1 has a stator 6 which has a stator lamination core 7 not shown in detail and a stator winding 8 arranged in the stator lamination core 7. In addition, the electric motor 1 includes a rotor shaft 9 on which a rotor 10 is mounted, the rotor having a rotor lamination core 11 not shown in detail and a rotor magnet or rotor winding (not shown) arranged in the rotor lamination core. The rotor shaft 9 is mounted by means of (roller) bearings 12a, 12b so as to be rotatable relative to the stator 6 about a rotor axis or a stator axis A. Specifically, the first bearing 12a is arranged in the front end plate 4 and the second bearing 12b is arranged in the rear end plate 5.

[0039] Furthermore, the electric motor 1 includes a temperature sensor 13 which is arranged in a fastening clip 14 and is connected to a (sensor) cable 15 which is guided through the motor housing 2. The temperature sensor 13 is thermally coupled to the stator winding 8 and is configured to measure the temperature of the stator winding 8. For this purpose, the electric motor 1 has a heat-conducting element 16 which is thermally connected to the stator winding 8 and is guided into the fastening clip 14. The fastening clip 14 in the closed state presses the temperature sensor 13 against the heat-conducting element 16 and in this way creates a thermal coupling between the temperature sensor 13 and the stator winding 8. The fastening clip 14 has a latch connection by means of which the fastening clip 14 remains closed.

[0040] It is also conceivable that the fastening clip 14 can be mounted directly on the stator winding 8, thereby also creating a thermally conductive coupling between the temperature sensor 13 and the stator winding 8. Then the separate thermally conductive element 16 can be dispensed with.

[0041] At this point, it should be noted that the motor housing 2 can also be configured differently and can include more or fewer components than Figure 1 shown. For example, the stator housing 3 can be pot-shaped and the front end plate 4 can be dispensed with. Thus, the first housing part 3 and the second housing part 5 can also be shaped differently.

[0042] Figure 2 A perspective view of a slightly more detailed embodiment of the stator 6a is now shown. The stator 6a in turn has a stator lamination core 7a and a stator winding 8a arranged in the stator lamination core. In this case, the ends 17 of the individual parts of the stator winding 8a are electrically connected to a connector 18, where the connector 18 extends annularly or arcuately around the stator axis A of the stator 6a. For example, the stator winding 8a can be formed by "U-shaped pins" in this case. The thermally conductive element or extension 16a against which the temperature sensor 13 abuts is connected to the connector 18 or is included by the connector.

[0043] In Figure 2 the temperature sensor 13 is covered by a fastening clip 14a, and the fastening clip 14a is not additionally mounted on Figure 2 the extension 16a in Figure 2 In this case, both the connector 18 and its extension 16a are thermally conductive intermediate members. The thermally conductive connection between the stator winding 8a and the temperature sensor 13 is thus "indirect" in this case. In addition,

[0044] Then, Figures 3 to 7 an example of the fastening clip 14b in different states is shown in different views.

[0045] Figure 3 A perspective view of the fastening clip 14b in the unmounted state is shown, Figure 4 the inserted temperature sensor 13a is shown, Figure 5 the additionally inserted thermally conductive element 16a is shown, Figure 6 the closed state is shown, Figure 7 a side view of the open state is shown.

[0046] In this exemplary embodiment, the fastening clip 14b is configured as a one-piece unit and has an upper part 20 and a lower part 21 which are connected to each other via a joint 22 and are thus pivotable relative to each other. In this example, the fastening clip 14b is made of plastic (in particular polyphenylene sulfide), where the joint 22 is formed by a narrow plastic web. However, the joint 22 can also be configured differently. Additionally, the fastening clip 14b can also be made of different materials.

[0047] The fastening clip 14b has two side projections 23 on its upper part 20, each having a recess 24 arranged therein. Two latching lugs 25 are arranged on the lower part, which interact with the side projections 23 or with the recesses 24 in the closed state of the fastening clip 14b (see in particular in this regard Figure 6 ). The lower part 21 further includes a support surface 26 for the temperature sensor 13a and a guide 27 for the heat-conducting element 16b. A downwardly projecting portion 28 is additionally provided on the upper part 20. Finally, an opening B for the cable 15 is located at the rear of the fastening clip 14b.

[0048] In Figure 4 , the temperature sensor 13a has been inserted into the fastening clip 14b and rests on the support surface 26. The cable 15 is guided through the opening B. The temperature sensor 13a can rest loosely on the support surface 26 or be attached (e.g., glued) to the support surface. It is also conceivable that the temperature sensor 13a is arranged in a recess in the fastening clip 14b and is in particular fastened in this recess.

[0049] In Figure 5 , the heat-conducting element 16a is additionally inserted into the fastening clip 14b. Specifically, the heat-conducting element rests on the temperature sensor 13a and is laterally fixed by the guide 27. The heat-conducting element 16a has a recess 29 into which the projecting portion 28 projects in the closed state of the fastening clip 14b, and axially fixes the heat-conducting element 16a to prevent it from slipping out of the fastening clip 14b.

[0050] For example, the recess 29 in the heat-conducting element 16a can be made using a chisel or a center punch. The resulting material upset area advantageously does not have the fastening clip 14b in order to rule out any negative influence on the contact pressure. Specifically, in this example, the projecting portion 28 is arranged outside the area of the side projections 23. It is also conceivable that for the axial fixing of the heat-conducting element 16a, the fastening clip 14b has a recess into which the projecting portion of the heat-conducting element 16a projects. Of course, it is also conceivable that the projecting portion 28 and the recess 29 are arranged at positions different from the positions shown.

[0051] The temperature sensor 13a can be axially fixed by the opening B, which is smaller than the length of the temperature sensor 13a measured transversely to the longitudinal length of the cable 15, in particular asFigure 4 As shown. In addition, it is conceivable that the temperature sensor 13a is axially fixed by a heat shrink tube mounted on the temperature sensor 13a and / or the cable 15, and the length of the heat shrink tube measured transversely to the longitudinal length of the cable 15 is greater than the opening B.

[0052] Due to the latching connection 30 formed by the latching lug 25 and the side protrusion 23 in this example, and also due to the elasticity of the material selected for the fastening clip 14b and the deformation present in the closed state of the fastening clip 14b, a contact pressure F generated by the fastening clip 14b is generated, which presses the temperature sensor 13a against the heat conducting element 16a, and thus a thermal conduction coupling is generated between the temperature sensor 13a and the stator windings 8, 8a. The contact pressure F generated by the fastening clip 14b is advantageously in the range of 10N ≤ F ≤ 40N. This ensures good heat transfer to the temperature sensor 13a, even when vibrations occur during the operation of the electric motor 1. In addition, the temperature sensor 13a is not subjected to excessive loads here, and the fastening clip 14b can be easily closed by hand. The specified contact pressure F is particularly related to the new state of the fastening clip 14b. Over time, the contact pressure F will decrease due to settlement and material creepage.

[0053] In addition, it is conceivable that an elastic element is arranged between the temperature sensor 13a and the fastening clip 14b and / or between the heat conducting element 16a and the fastening clip 14b (not shown), and optionally strengthens the thermal conduction coupling between the temperature sensor 13a and the heat conducting element 16a. For example, the elastic element can be made of silicone resin and can be used to better compensate for manufacturing tolerances. The heat shrink tube covering at least a part of the temperature sensor 13a, due to its elasticity, can also strengthen the thermal conduction coupling between the temperature sensor 13a and the heat conducting element 16a, and thus also assumes the function of such an elastic element.

[0054] Figure 7 In addition, a retaining tongue 31 is also shown, which fixes the temperature sensor 13a at least at one end to prevent it from falling off, which is particularly advantageous when the temperature sensor 13a is only loosely inserted into the fastening clip 14b. In particular, the combined retaining action of the cable 15 guided through the opening B and any axial fixation, such as by a heat shrink tube, results in a relatively firm fixation of the temperature sensor 13a in the fastening clip 14b, such that the fastening clip can be reliably attached during the process.

[0055] In the example shown, the fastening clips 14, 14a, 14b are attached in the regions of the (separate) heat-conducting elements 16, 16a. However, as an alternative, it is also conceivable that the fastening clips 14, 14a, 14b are mounted directly on the stator windings 8, 8a. For example, the stator windings 8, 8a can then be guided through a larger opening B. When the fastening clips 14, 14a, 14b are mounted on the stator windings 8, 8a, the heat-conducting elements 16, 16a can be dispensed with.

[0056] It is also conceivable that the fastening clip 14b is not a one-piece structure as Figures 3 to 7 shown, but a two-piece structure. Then the joint 22 can be dispensed with, and the upper part 21 and the lower part 21 exist as separate parts. Thus, in certain cases, especially when the stator windings 8, 8a are to be guided through the fastening clip 14b, the installation is simplified.

[0057] In summary, a method for creating a thermally conductive coupling between the temperature sensors 13, 13a and the stator windings 8, 8a or the heat-conducting elements 16, 16a in the electric machine 1 (where the heat-conducting elements are thermally connected to the stator windings) can include the following steps:

[0058] - Arranging the temperature sensors 13, 13a and the stator windings 8, 8a or the heat-conducting elements 16, 16a in the fastening clips 14, 14a, 14b, and

[0059] - Creating a thermally conductive coupling between the temperature sensors 13, 13a and the stator windings 8, 8a or the heat-conducting elements 16, 16a by closing the fastening clips 14, 14a, 14b, where the latch connection 30 of the fastening clips 14, 14a, 14b latches, and where the fastening clips 14, 14a, 14b press the temperature sensors 13, 13a against the stator windings 8, 8a or the heat-conducting elements 16, 16a.

[0060] The fastening clips 14, 14a, 14b can generally be releasable or non-releasable. Figures 3 to 7 The shown fastening clip 14b is releasable - provided that the material of the fastening clip 14b has sufficient elasticity. For the purpose of release, the side protrusions 23 are bent slightly to the side in order to cancel the latch connection 30. This allows for easy replacement of the temperature sensor 13a. However, it is also conceivable that, through a corresponding design of the latch connection 30, the fastening clips 14, 14a, 14b cannot be opened again without being damaged after closing, and thus the thermal coupling between the temperature sensor 13a and the stator winding 8, 8a cannot be released or cannot be released without being damaged, for example if this is not planned or necessary after commissioning the electric machine 1.

[0061] Figure 8Finally, the electric motor 1 installed in the vehicle 32 is shown. The vehicle 32 has two axles, one of which is driven. Specifically, the electric motor 1 is connected to the half shaft 34 of the rear axle via an optional gearbox 33. Finally, the driven wheel 35 is mounted on the half shaft 34. The vehicle 32 is at least partially or temporarily driven by the electric motor 1. This means that the electric motor 1 can be used as the sole drive device of the vehicle 32, or can be provided, for example, together with an internal combustion engine (hybrid drive device).

[0062] In summary, it should be emphasized that the scope of protection is determined by the claims. However, the description and the drawings are applied to interpret the claims. The features contained in the drawings can be exchanged and combined with each other as needed. In particular, it should also be emphasized that the shown devices can actually include more or fewer constituent parts than those shown. In some cases, the shown devices or their constituent parts can also be shown not to scale and / or to scale up and / or to scale down.

[0063] List of reference signs

[0064] 1 Electric motor

[0065] 2 Electric motor housing

[0066] 3 Stator housing

[0067] 4 Front end plate

[0068] 5 Rear end plate

[0069] 6, 6a Stator

[0070] 7, 7a Stator lamination core

[0071] 8, 8a Stator winding

[0072] 9 Rotor shaft

[0073] 10 Rotor

[0074] 11 Rotor lamination core

[0075] 12a, 12b (Roller) bearing

[0076] 13, 13a Temperature sensor

[0077] 14, 14a, 14b Fastening clip

[0078] 15 (Sensor) cable

[0079] 16, 16a Heat conducting element / extension

[0080] 17 End of stator winding part

[0081] 18 Connector

[0082] 19 Stator winding connection

[0083] 20 Upper part of fastening clip

[0084] 21 Lower part of fastening clip

[0085] 22 Connector

[0086] 23 Side protrusion

[0087] 24 Side protrusion recess

[0088] 25 Latch lug

[0089] 26 Support surface for temperature sensor

[0090] 27 Guide for heat conducting element

[0091] 28 Fastening clip protrusion

[0092] 29 Heat conducting element recess

[0093] 30 Latch connection

[0094] 31 Retaining tongue

[0095] 32 Vehicle

[0096] 33 Gearbox

[0097] 34 Half shaft

[0098] 35 Wheel

[0099] A Stator axis / Rotor axis

[0100] B Opening for (sensor) cable

[0101] F Contact pressure

Claims

1. A motor (1), comprising: - a stator (6, 6a) comprising a stator laminate core (7, 7a) having a plurality of stator laminates stacked axially on top of each other and a stator winding (8, 8a) arranged in the stator laminate core (7, 7a), - a temperature sensor (13, 13a) thermally coupled to the stator winding (8, 8a) and configured to measure the temperature of the stator winding (8, 8a), It is characterized in that - A thermally conductive coupling between the temperature sensor (13, 13a) and the stator winding (8, 8a) is produced by a fastening clip (14, 14a, 14b) having a latching connection (30), and the fastening clip (14, 14a, 14b) presses the temperature sensor (13, 13a) against the stator winding (8, 8a) or against a heat-conducting element (16, 16a) which is thermally conductively connected to the stator winding (8, 8a).

2. The electric machine (1) according to claim 1, characterized in that - the ends (17) of the individual parts of the stator winding (8, 8a) are electrically connected to a connector (18), which extends in a ring or arc around the stator axis (A) of the stator (6, 6a), and - The heat conducting element (16, 16a) is formed by the connector (18) or is comprised in the connector.

3. The electric motor (1) according to claim 2, characterized in that The heat conducting element (16, 16a) has an extension to which the fastening clip (14, 14a, 14b) is fastened.

4. An electric machine (1) according to any one of the preceding claims, characterized in that The contact pressure (F) generated by the fastening clamp (14, 14a, 14b) is in the range of 10N ≤ F ≤ 40N.

5. The electric machine (1) according to any one of the preceding claims, characterized in that The fastening clamp (14, 14a, 14b) has a projection (28) which projects into a recess (29) in the stator winding (8, 8a) or the heat-conducting element (16, 16a), or the fastening clamp (14, 14a, 14b) has a recess into which a projection of the stator winding (8, 8a) or the heat-conducting element (16, 16a) projects.

6. An electric machine (1) according to any one of the preceding claims, characterized in that The fastening clip (14, 14a, 14b) has a guide (27) for the heat conducting element (16, 16a).

7. An electric machine (1) according to any one of the preceding claims, characterized in that The temperature sensor (13, 13a) is a) loosely arranged in a recess in the fastening clip (14, 14a, 14b) or b) fastened to the fastening clip (14, 14a, 14b).

8. An electric machine (1) according to any one of the preceding claims, characterized in that The cable (15) of the temperature sensor (13, 13a) is guided through an opening (B) in the fastening clamp (14, 14a, 14b), wherein the opening (B) is smaller than the length of the temperature sensor (13, 13a) or the heat shrink tubing mounted on the cable (15) measured transversely to the longitudinal length of the cable (15).

9. An electric machine (1) according to any one of the preceding claims, characterized in that The elastic elements are arranged as follows: - between the temperature sensor (13, 13a) and the fastening clip (14, 14a, 14b), and / or - between the stator winding (8, 8a) or the heat conducting element (16, 16a) and the fastening clip (14, 14a, 14b).

10. An electric machine (1) according to any one of the preceding claims, characterized in that The fastening clip (14, 14a, 14b) is constructed i) in multiple parts or ii) in one part.

11. An electric machine (1) according to any one of the preceding claims, characterized in that The two parts (20, 21) of the fastening clamp (14, 14a, 14b) are connected to each other via a joint (22), the two parts being pivotable relative to each other.

12. An electric machine (1) according to any one of the preceding claims, characterized in that The fastening clip (14, 14a, 14b) contains plastic, in particular polyphenylene sulfide.

13. A vehicle (32) having an electric machine (1) according to any one of claims 1 to 12, which is provided for driving the vehicle (32).

14. A method for producing a thermally conductive coupling between a temperature sensor (13, 13a) and a stator winding (8, 8a) or a thermally conductive element (16, 16a) of an electric machine (1), in particular an electric machine (1) according to any one of claims 1 to 12, the thermally conductive element being thermally conductively connected to the stator winding (8, 8a), the method comprising the following steps: - arranging the temperature sensor (13, 13a) and the stator winding (8, 8a) or the heat-conducting element (16, 16a) in the fastening clip (14, 14a, 14b), and - A thermally conductive coupling is produced between the temperature sensor (13, 13a) and the stator winding (8, 8a) or the heat-conducting element (16, 16a) by closing the fastening clamp (14, 14a, 14b), wherein the latching connection (30) of the fastening clamp (14, 14a, 14b) latches and the fastening clamp (14, 14a, 14b) presses the temperature sensor (13, 13a) against the stator winding (8, 8a) or the heat-conducting element (16, 16a).

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