Temperature measuring device for stator of electric machine with hairpin or rod wave winding

Abstract

The invention relates to a temperature measuring device (1) for a stator (31) of an electric machine (30) having a hairpin or rod wave winding (32, 33, 34), the temperature measuring device for measuring the temperature of the stator (31), the temperature measuring device having: a sensor device (2) for measuring the temperature of the stator (31); a retaining device (3) for retaining the sensor device (2) on the winding (32) of the stator (31), wherein the retaining device (3) is designed to engage behind at least one winding (33, 34) of the stator (31) and latch onto the at least one winding. The invention also relates to an electric machine (30) having a hairpin or rod wave winding and having a temperature measuring device (1).

Description

Technical Field

[0001] The present invention relates to a temperature measuring device for a stator of an electric machine having a hairpin or rod-shaped wave winding, the temperature measuring device being used to measure the temperature of the stator. The present invention also relates to an electric machine having a hairpin or rod-shaped wave winding. Background Art

[0002] With regard to the development of electric machines, in particular with regard to the development of electric machines for electric hybrid vehicles and for electric vehicles or for wheel hub drives, various winding technologies for the stators of electric machines are known.

[0003] For example, an arrangement for temperature detection of a stator winding of an electric machine according to DE 10 2013 201 835 A1 is known from the prior art.

[0004] In this arrangement, the temperature sensor arranged on the nozzle can be inserted in a self-supporting manner between two stator winding sections.

[0005] The temperature sensor is arranged in the housing of the electric machine via a connecting conductor alignment element and the temperature sensor is also protected by an outer plastic sheath.

[0006] This design is not suitable for particularly dense or compact windings, such as so-called hairpin or rod-wave windings, since the gaps between the individual winding sections are very small.

[0007] In other words, temperature sensing in the case of such windings (hairpin or rod wave windings) is difficult because such windings are wound or equipped so tightly that a conventional temperature sensor cannot be inserted between the windings or the corresponding wires, or this may be achieved very poorly and with great effort. Summary of the invention

[0008] Therefore, the object of the present invention is to provide a temperature measuring device for the stator of an electric machine with a hairpin or rod wave winding, and the temperature measuring device is used to measure the temperature of the stator, as well as to provide an inexpensive and simple electric machine with a hairpin or rod wave winding, and preferably to provide a permanent and stable thermal connection of the temperature sensor to the hairpin or rod wave winding of the stator.

[0009] Another object of the invention is to propose a temperature measuring device and a motor which compensate for manufacturing and material tolerances as well as for movements due to vibrations and temperature variations.

[0010] According to the invention, these objects are achieved by the following features.

[0011] According to the present invention, in a first aspect of the present invention, a temperature measuring device for a stator of a motor having a hairpin or bar wave winding is provided, the temperature measuring device being used to measure the temperature of the stator, the temperature measuring device comprising:

[0012] - a sensor device for measuring the temperature of the stator; and

[0013] A holding device for holding the sensor device on the winding of the stator.

[0014] The retaining device is preferably designed to engage behind at least one winding of the stator and latch onto said winding.

[0015] In other words, preferably, the holding device is designed to press the sensor device against the winding or against the geometry of the winding or the insulating paper on the outside of the hollow cylindrical stator and to latch it in a removable manner on the inside to at least one winding of the hollow cylindrical stator. In this way, a cheap, simple and preferably permanent and all-inclusive removable connection of the sensor device to the hairpin or rod wave winding of the stator can be provided. This also allows compensation for manufacturing and material tolerances of the stator and movements of the stator due to vibrations and temperature changes during operation of the electric machine, since the sensor device is no longer arranged inside the stator as in the prior art but outside. Therefore, a stable thermal connection of the sensor device to the hairpin or rod wave winding can also be provided.

[0016] The holding device advantageously has a receiving portion for the sensor device and / or at least one latching portion for latching to at least one winding of the stator and / or at least one positioning portion for positioning the temperature measuring device on the winding.

[0017] The receiving portion is preferably formed and aligned in a first plane and the at least one latch portion is formed and aligned in a second plane.

[0018] It may be provided that the first plane and the second plane intersect, in particular are aligned perpendicularly to one another.

[0019] It is also advantageous if the holding device has a first end and a second end in the axial direction.

[0020] The at least one positioning portion is preferably arranged at the first end.

[0021] It is also advantageous that the at least one latching part is arranged, in particular spring-mounted, on the first end. In this way, a force can be generated by means of a spring-loaded design.

[0022] The at least one positioning portion and the at least one latching portion are advantageously spaced apart from one another in the circumferential direction.

[0023] The at least one latching part advantageously has a first end and a second end in radial direction, the at least one latching part preferably being connected to the receiving part of the holding device, in particular in one piece, via its first end. The one-piece design simplifies manufacturing and assembly work and reduces costs.

[0024] It is also advantageous if the at least one latching portion extends in a radial direction away from the receiving portion in a self-supporting manner.

[0025] It is also advantageous if the at least one latching part has at its second end a latching part, in particular a hook, for engaging behind the winding and latching onto it.

[0026] The at least one latching part advantageously has a spring element which is arranged between the first end and the second end of the latching part in order to press the sensor device against the winding or the insulating paper by means of a spring force.

[0027] It is also advantageous if the spring element has, in particular, a Σ-shaped or E-shaped profile in the second plane. The spring element preferably has the task of generating a force in the second plane which generates a tensioning force in order to fix the temperature measuring device.

[0028] Furthermore, it can be provided that the retaining device comprises two latching parts which are spaced apart from one another in the circumferential direction.

[0029] The at least one positioning portion is preferably arranged at the first end of the holding device.

[0030] Furthermore, it is preferred that the at least one positioning portion extends in a radial direction away from the receiving portion of the holding device.

[0031] The at least one positioning portion is advantageously designed to be in the shape of a cuboid.

[0032] It is also advantageous if the at least one positioning portion is connected to the receiving portion in one piece.

[0033] It can also be provided that the holding device comprises two positioning portions which are spaced apart from each other in the circumferential direction.

[0034] It is also conceivable that the two positioning portions are spaced apart from one another, so that the sensor device can be arranged between the two positioning portions.

[0035] Furthermore, it is possible that the at least one positioning portion and the at least one latching portion extend from the receiving portion in the same direction, in particular in the same second plane.

[0036] The receiving part advantageously has a receiving section for receiving the sensor device, which receiving section is designed in particular as a recess.

[0037] It is also advantageous if the receiving portion extends from a first end to a second end of the holding device.

[0038] It is also advantageous if the temperature measuring device comprises an alignment element which is arranged in the receiving section and aligns the sensor device on the winding of the stator.

[0039] In other words, it is preferred that the temperature measuring device comprises an alignment element which is arranged between the holding device and the sensor device to exert a force on the sensor device such that the sensor device can be pressed against the winding over a large area.

[0040] The alignment element preferably extends along the receiving section.

[0041] Furthermore, it can be provided that the alignment element is made of plastic, in particular of a preferably soft elastomeric material. In this way, a stable thermal connection of the sensor device to the hairpin or rod wave winding can be provided. In other words, the alignment element is designed to deform so that the sensor device is always pressed against the hairpin or rod wave winding of the motor in the best possible way, ensuring the largest possible area of ​​contact between the sensor device and the wave winding.

[0042] The sensor device preferably comprises a temperature sensor.

[0043] It is also preferred that the sensor device comprises a cable connection for connecting the temperature sensor to the evaluation unit.

[0044] The cable connection is preferably at least partially connected to the holding device, in particular partially cast in the holding device.

[0045] The sensor device advantageously has a first end and a second end in the axial direction, the temperature sensor preferably being arranged at the first end and the cable connection being arranged at the second end.

[0046] Furthermore, it is advantageous if the sensor device comprises a protective device, in particular a PTFE sheath, for example in the form of a shrink tube, which in particular completely encloses the temperature sensor and at least partially encloses the cable connection.

[0047] Furthermore, it is advantageous if the sensor device is adapted in shape and size to the receiving section of the holding device. Of course, the receiving section can also be adapted to the geometry of the sensor device.

[0048] Finally, it should also be noted that it can be provided that the temperature measuring device is produced from plastic.

[0049] A second aspect of the invention comprises an electric machine having a hairpin or bar wave winding.

[0050] Reference is explicitly made to the fact that the features of the temperature measuring device mentioned in the context of the first aspect can be used in the electrical machine individually or in combination with one another.

[0051] In other words, the above-mentioned features related to the temperature measuring device in the first aspect of the present invention may also be combined with other features in the second aspect of the present invention.

[0052] An electric machine with a hairpin or rod wave winding preferably comprises:

[0053] a hollow cylindrical stator, in particular made with a hairpin or bar wave winding, having at least one winding; and

[0054] - The temperature measuring device according to the first aspect.

[0055] Furthermore, it is preferred that the temperature measuring device has its sensor device arranged on a first winding and has the two latching parts latched to the other winding in order to hold the temperature measuring device in place on the stator.

[0056] The latching portion preferably has a length such that the latching portion extends from the outer circumferential surface of the stator to the inner circumferential surface of the stator. In other words, advantageously, the latching portion extends through the wall thickness of the hollow cylindrical stator, while the temperature measuring device is located on the outer side or outer surface of the stator.

[0057] The inventive concepts presented above will be further described below in different expressions.

[0058] The concept preferably comprises—in short—mounting the temperature sensor or the sensor device on a hairpin or rod-shaped wave winding of the stator by means of a clip or a retaining device.

[0059] By means of the alignment element, preferably made of elastomer, radial and tangential compensation of manufacturing and material tolerances as well as compensation of movements due to vibrations and temperature changes is preferably performed and a permanent and stable thermal connection is provided. This concept is characterized by particularly simple and safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The present invention will be described in more detail below using exemplary embodiments in conjunction with the associated drawings. In the schematically shown drawings:

[0061] Figure 1 A three-dimensional view of a temperature measuring device according to the invention for a stator of an electric machine is shown;

[0062] Figure 2 Shown from Figure 1 A three-dimensional view of the sensor device; and

[0063] Figures 3 to 6 Shown is a Figure 1 Different side views and different spatial views of a detail of an electric machine of the temperature measuring device according to the invention. DETAILED DESCRIPTION

[0064] In the following description, the same reference numerals will be used for the same components.

[0065] Figure 1 A three-dimensional view of a temperature measuring device 1 according to the invention for a stator 31 of an electric machine 30 is shown.

[0066] To explain in more detail, Figure 1 A temperature measuring device 1 for a stator 31 of an electric machine 30 having a hairpin or bar-wave winding 32 , 33 , 34 is shown, which serves to measure the temperature of the stator 31 .

[0067] The temperature measuring device 1 has a sensor device 2 for measuring the temperature of a stator 31 and a holding device 3 for holding the sensor device 2 on a winding 32 of the stator 31 .

[0068] The retaining device 3 is designed to engage behind the two windings 33, 34 of the stator 31 and latch onto them (cf. e.g. Figures 3 to 6 ).

[0069] also, Figure 1 The holding device 3 is shown to have a receiving portion 4 for the sensor device 2 , two latching portions 5 , 6 for latching onto a winding 32 of a stator 31 , and two positioning portions 7 , 8 for positioning the temperature measuring device 1 on the winding 32 .

[0070] according to Figure 1 , the receiving portion 4 is formed and aligned in a first plane E1, and the two latching portions 5, 6 are formed and aligned in a second plane E2, wherein the first plane E1 and the second plane E2 are aligned perpendicularly relative to each other.

[0071] In the axial direction A, the holding device 3 has a first end 9 and a second end 10 , wherein the two positioning parts 7 , 8 and the two latching parts 5 , 6 are arranged on the first end 9 .

[0072] As from Figure 1It can also be seen that the two latch parts 5 and 6 are spaced apart from each other in the circumferential direction U, and each latch part has a first end 11 and a second end 12 in the radial direction R, wherein each latch part 5 and 6 is integrally connected to the receiving part 4 of the retaining device 3 via its first end 11.

[0073] Each latching part 5, 6 also extends in a self-supporting manner in the radial direction R from the receiving part 4, wherein each latching part 5, 6 has a latching element 13 designed as a hook at its second end 12 for reaching behind the winding 33, 34 and latching onto the winding 33, 34 or onto the insulating paper of the electric machine 30 (see also Figures 3 to 6 ).

[0074] The spring element 14 is arranged between the first end 11 and the second end 12 of the latch parts 5 , 6 to press the sensor device 2 against the winding 32 by means of a spring force.

[0075] The spring element 14 has a Σ-shaped or E-shaped profile, in particular in the second plane E2 . This profile can look different depending on the design of the spring element 14 .

[0076] from Figure 1 It can also be seen in FIG. 1 that each positioning portion 7 , 8 is arranged at a first end 9 of the holding device 3 , wherein each positioning portion 7 , 8 extends in a radial direction R away from the receiving portion 4 of the holding device 3 .

[0077] Therefore, the positioning portions 7 , 8 and the latching portions 5 , 6 extend from the receiving portion 4 in the same direction.

[0078] Furthermore, the positioning parts 7 , 8 are rectangular parallelepiped and connected to the receiving part 4 in a single piece.

[0079] Furthermore, the two positioning portions 7 , 8 of the holding device 3 are spaced apart from one another in the circumferential direction U, ie such that the sensor device 2 is arranged between the two positioning portions.

[0080] Also like Figure 1 As shown, the receiving part 4 has a receiving section 15 for receiving the sensor device 2 , which is designed in particular as a recess.

[0081] The receiving section 15 extends from the first end 9 to the second end 10 of the holding device 3 .

[0082] exist Figure 1 or better yet Figure 6 It can also be seen in FIG. 1 that the temperature measuring device 1 comprises an alignment element 16 which is arranged in the receiving section 15 and which can align the sensor device 2 on the winding 32 of the stator 31 .

[0083] Therefore, the temperature measuring device 1 has an alignment element 16 between the holding device 3 and the sensor device 2 to exert a force on the sensor device 2 so that the sensor device can be pressed against the winding 32 over a large area (for example, in this case, Figures 3 to 6 ).

[0084] The alignment element 16 extends along the receiving section 15 and is produced from an elastomeric material.

[0085] Figure 2 Shown from Figure 1 A three-dimensional view of the sensor device 2.

[0086] Here, the sensor device 2 has a temperature sensor 17 and a cable connection 18 for connecting the temperature sensor 17 to the evaluation unit. Such a connection between the temperature sensor 17 and the cable connection 18 is preferably realized by conventional connection techniques, for example by welding or crimping the temperature sensor 17 and the required cable connection 18.

[0087] The temperature sensor 17 may be an NTC resistor element or a PTC resistor element.

[0088] The cable connection 18 is partially connected to the holding device 3 or partially cast in the holding device (see Figure 1 , the second end 10 of the holding device 3).

[0089] The sensor device 2 also has, in the axial direction A, a first end 19 and a second end 20 , wherein the temperature sensor 17 is arranged at the first end 19 and the cable connection 18 is arranged at the second end 20 .

[0090] Furthermore, the sensor device 2 has a protective device 21 , in particular a PTFE sheath, for example in the form of a shrink tube, which completely and partially encloses the temperature sensor 17 and the cable connection 18 .

[0091] In order to be able to arrange the sensor device 2 in the receiving section 15 of the holding device 3, the sensor device is adapted in shape and size to the receiving section 15. Of course, the receiving section 15 can also be adapted to the geometry of the sensor device 2.

[0092] Finally, refer to Figure 1 It should be noted that the temperature measuring device 1 is made of plastic.

[0093] Figures 3 to 6 Each shows a Figure 1 FIG. 1 shows different side views and different spatial views of a detail of an electric machine 30 of a temperature measuring device 1 according to the invention.

[0094] Strictly speaking, Figures 3 to 6 An electric machine 30 is shown having a hairpin or rod wave winding.

[0095] The electric motor 30 has a hollow cylindrical stator 31 which is manufactured from hairpin or bar wave windings 32 , 33 , 34 and has a plurality of, in particular three, windings 32 , 33 , 34 .

[0096] Here, from Figure 1 and Figure 2 The temperature measuring device 1 is arranged on the stator 31 .

[0097] At this point, further description regarding the temperature measuring device 1 is omitted and reference is made to Figure 1 and Figure 2 Regarding the above-mentioned remarks, these remarks apply analogously here.

[0098] As already about Figure 1 As described, the temperature measuring device 1 comprises a sensor device 2 for measuring the temperature of a stator 31 and a holding device 3 for holding the sensor device 2 on a winding 32 of the stator 31 .

[0099] In other words, the holding device 3 is designed to press the sensor device 2 against the winding 32 on the outside AS of the hollow cylindrical stator 31 and to engage it in a detachable manner on the several windings 33 , 34 of the hollow cylindrical stator 31 on the inside IS.

[0100] As especially from Figure 3 and Figure 4 As can be seen in FIG. 1 , the temperature measuring device 1 has its sensor device 2 arranged on a first winding 32 and has two latching parts 5 , 6 latched to the other windings 33 , 34 in order to hold the temperature measuring device 1 in place on the stator 31 .

[0101] The latching portions 5 , 6 have such a length that they extend from the outer side surface AS of the stator 31 to the inner side surface IS thereof, whereby the latching element 13 latches onto the windings 33 , 34 .

[0102] The following is presented Figures 1 to 6 Describe it again, but describe it in a different way.

[0103] Here, preferably Figure 3 The basic idea of ​​the solution of the present invention is shown in FIG.

[0104] Here, the sensor device 2 is held by a clip-shaped piece or by a holding device 3 which latches onto the hairpin or rod wave winding and is guided by a soft element or alignment element 16 , such as an elastomer, the sensor device being pressed evenly against the outer geometry of the winding 32 .

[0105] For example, in Figure 1 The structure of the solution of the present invention is shown in FIG.

[0106] The connecting element or cable connection 18 of the sensor device 3 is preferably connected to the signal line or cable by means of a connection technique (for example welding, crimping, etc.).

[0107] The clip or temperature measuring device 1 can be a plastic injection-molded part based on the geometry of the winding. The clip 1 also has an elastomer or alignment element 16 in the receiving section 15 of the holding device 3, see Figure 6 The elastomer or the alignment element has the task of compensating for radial tolerances and pressing the temperature sensor 17 or the entire sensor arrangement 2 against the winding.

[0108] This alignment element 16 is positioned subsequently or is produced from the outset together with the holding device 3 .

[0109] The elastomer or alignment element 16 between the temperature measuring device 1 and the sensor device 2 improves radial tolerance compensation, since the temperature sensor 17 or the sensor device 2 is pressed against the winding and against the alignment element 16 .

[0110] The material of the alignment element 16 is preferably selected such that it can be compressed by slight pressure and returns to the starting position when the temperature measuring device 1 is removed in order to be repositioned later.

[0111] In order to mount the temperature measuring device 1 on the geometry of the hairpin or rod-shaped wave winding 32 , additional webs or positioning sections 7 , 8 are used for guidance and angular orientation.

[0112] When the end mounted temperature measuring device 1 is pressed against the hairpin or rod wave winding 32, see Figures 3 to 6 , the external force is applied radially outward.

[0113] The positioning parts 7 , 8 now preferably have the task of guiding the temperature measuring device 1 via the hairpin part until it is locked in the end position of the temperature measuring device by means of the fixing hook or locking element 13 .

[0114] Before this happens, the sensor device 3 is pressed against the soft elastomer or alignment element 16. Thus, in the end position of the temperature measuring device 1 an optimum connection of the temperature sensor 17 or sensor device 2 and the hairpin or rod-like wave winding 32 is established.

[0115] Reference numerals list

[0116] 1 Temperature measuring device 2 Sensor device 3 Holding device 4 Receiving portion 5 Latching portion 6 Latching portion 7 Positioning portion 8 Positioning portion 9 First end of the holding device 10 Second end of the holding device 11 First end of the latching portion 12 Second end of the latching portion 13 Latching element 14 Spring element 15 Receiving section 16 Alignment element 17 Temperature sensor 18 Cable connection 19 First end of the sensor device 20 Second end of the sensor device 21 Protective device 30 Motor 31 Stator 32 Winding 33 Winding 34 Winding A Axial direction R Radial direction U Circumferential direction E1 First plane E2 Second plane AS Outside IS Inside

Claims

1. A temperature measuring device (1) for a stator (31) of an electric machine (30) having a hairpin or rod wave winding (32, 33, 34), the temperature measuring device being used to measure the temperature of the stator (31), the temperature measuring device comprising: - a sensor device (2) for measuring the temperature of the stator (31); - a holding device (3) for holding the sensor device (2) on the winding (32) of the stator (31), -in, The retaining device (3) is designed to engage radially outside at least one winding (33, 34) of the stator (31) and latch onto the at least one winding, and the retaining device (3) has: a receiving portion (4) for the sensor device (2) and at least one latching portion (5, 6) connected to the receiving portion; the receiving portion (4) is formed and aligned in a first plane (E1), and the at least one latching portion (5, 6) is formed and aligned in a second plane (E2), and the first plane (E1) and the second plane (E2) intersect.

2. The temperature measuring device according to claim 1, - wherein the retaining device (3) is designed to press the sensor device (2) against the winding (32) on the radial outer side (AS) of the hollow cylindrical stator (31) and to engage in a detachable manner on the radial inner side (IS) of at least one winding (33, 34) of the hollow cylindrical stator (31).

3. The temperature measuring device according to claim 1, The at least one latching portion is for latching onto at least one winding (32) of the stator (31); and / or at least one positioning portion (7, 8) for positioning the temperature measuring device (1) on the winding (32), wherein: The first plane (E1) and the second plane (E2) are aligned perpendicularly with respect to each other.

4. The temperature measuring device according to claim 3, - wherein the retaining device (3) has a first end (9) and a second end (10) in the axial direction (A), -in, The at least one latching portion (5, 6) is spring-mounted on the first end (9), - wherein said at least one positioning portion (7, 8) is arranged on said first end (9).

5. The temperature measuring device according to claim 1, -in, The at least one latching part (5, 6) has a first end (11) and a second end (12) in a radial direction (R), - wherein the at least one latching part (5, 6) is connected in one piece via its first end (11) to the receiving part (4) of the retaining device (3), - wherein the at least one latching portion (5, 6) extends in a self-supporting manner from the receiving portion (4) in the radial direction (R), - wherein the at least one latching portion (5, 6) has a hook at its second end (12) for reaching behind the winding (32) and latching onto said winding, - wherein the at least one latching part (5, 6) has a spring element (14) which is arranged between the first end (11) and the second end (12) of the latching part (5, 6) in order to press the sensor device (2) against the winding (32) by means of a spring force.

6. A temperature measuring device according to claim 3 and according to claim 3, in, The at least one latching part (5, 6) has a first end (11) and a second end (12) in a radial direction (R), - wherein the at least one positioning portion (7, 8) is arranged at the first end (9) of the holding device (3), - wherein the at least one positioning portion (7, 8) extends from the receiving portion (4) of the holding device (3) in a radial direction (R), The temperature measuring device according to any of the preceding claims and according to claim 3, - wherein the at least one positioning portion (7, 8) is a cuboid, The temperature measuring device according to any of the preceding claims and according to claim 3, - wherein the at least one positioning portion (7, 8) is connected to the receiving portion (4) in one piece.

7. The temperature measuring device according to any one of the preceding claims 1 to 6, -in, The receiving part (4) has a receiving section (15) for receiving the sensor device (2), wherein the receiving section is designed as a recess. wherein the receiving section (15) extends from the first end (9) to the second end (10) of the holding device (3), wherein the temperature measuring device (1) comprises an alignment element (16) which is arranged in the receiving section (15) and aligns the sensor device (2) on the winding (32) of the stator (31).

8. The temperature measuring device according to claim 7, - wherein the alignment element (16) is made of plastic.

9. The temperature measuring device according to claim 7, The alignment element is made of an elastomeric material.

10. The temperature measuring device according to any one of the preceding claims 1 to 6, - wherein the sensor device (2) comprises a temperature sensor (17), -in, The sensor device (2) comprises a cable connection (18) for connecting the temperature sensor (17) to an evaluation unit, - wherein the cable connection (18) is at least partially connected to the holding device (3), - wherein the sensor device (2) comprises a protective device (21), a PTFE sheath in the form of a shrink tube, the protective device completely enclosing the temperature sensor (17), and the protective device at least partially enclosing the cable connection (18).

11. The temperature measuring device according to claim 10, The cable connection (18) is partially cast in the retaining device.

12. The temperature measuring device according to claim 10, The protective device (21) is a PTFE sheath in the form of a shrink tube.

13. An electric machine (30) having a hairpin or rod wave winding, the electric machine having: - a hollow cylindrical stator (31) made of hairpin or rod wave windings (32, 33, 34), the stator having at least one winding (32, 33, 34), - Temperature measuring device (1) according to any of the preceding claims.

14. The electric machine according to claim 13, - wherein the temperature measuring device (1) has its sensor device (2) arranged on a first winding (32) and its two latching parts (5, 6) respectively engaged on another winding (33, 34) in order to hold the temperature measuring device (1) in place on the stator (31), -in, The latching portion (5, 6) has a length such that the latching portion extends from an outer side surface (AS) of the stator (31) to an inner side surface (IS) of the stator.

Images