Wiring configuration for stator, temperature sensor device and system for detecting temperature

Abstract

The invention relates to a wiring configuration (10) for a stator (100) of an electric machine. The wiring configuration (10) comprises a busbar (14) forming a switching ring segment with an external connection part (16) and a winding connection part (18). The external connection element and the winding connection element are arranged in a wiring area (22). The wiring configuration (10) further comprises a receiving element (12) which is at least thermally coupled to the busbar (14). The receiving element (12) is arranged outside the wiring area (22). The invention further relates to a temperature sensor device (50) for being inserted into the receiving element (12) of the wiring configuration (10) and a system (74) for detecting the temperature of the stator (100).

Description

[0001] The present invention relates to an interconnection mechanism for a stator of an electric machine and a temperature sensor device for the interconnection mechanism. One aspect relates to a system for detecting temperature at a stator and a stator of an electric machine having an interconnection mechanism on which a temperature sensor is arranged.

[0002] According to known designs, the stator coils or stator windings of the electric machine can be contacted with external terminal points or power terminals by means of interconnection mechanisms so that corresponding voltages can be applied to the individual phases of the windings by means of electrical circuits or power electronics.

[0003] Known interconnection mechanisms have, for example, connector rings housed in a carrier. The carrier simultaneously enables the rings to be positioned and the connector rings to be electrically insulated from one another. The connector rings are securely fixed in the carrier.

[0004] The connector ring has winding terminals, for example, for connecting the interconnection mechanism to the stator windings and external terminals. Via the external terminals, the individual stator windings are each placed in contact with an external terminal, for example with a power cable of a power electronics device.

[0005] During operation of the electric machine, the stator may heat up. For example, it is necessary to detect current temperature values ​​at the stator or at the interconnection during operation. The temperature sensor may be positioned directly on the coil conductors of the stator winding or on the connecting conductors of the interconnection, for example.

[0006] JP 2012 057 980 A discloses a temperature detector having a temperature sensor. The temperature sensor is arranged on a linear conductor forming a coil of a motor so as to detect the temperature of the linear conductor.

[0007] A temperature sensor fastened to a current contact is known from DE 20 2016 103 030 U1. The temperature sensor is fastened with a heat-shrinkable sleeve, and the mechanism is arranged in the plug housing.

[0008] US 2013 270 973 A1 discloses a rotating electric machine. The electric machine comprises a winding conductor and a neutral line in contact with the winding. The neutral line is wound around a temperature sensor so as to detect the temperature of the neutral line. The neutral line and the temperature sensor are surrounded by a cast housing.

[0009] In known designs, the temperature sensor is fastened, for example, in the coil conductor region for making electrical contact with adjacent coil conductors. This may result in the disadvantage that the replaceability of the sensor (for example in the event of a sensor failure) may also result in damage to the electrical contacts.

[0010] The temperature sensor can be fastened, for example, by means of an injection-molded package, so that the temperature sensor can be permanently fixed. However, in the case of a temperature sensor fastened by means of an injection-molded package, for example, removing the temperature sensor increases the risk of damaging the stator part to which the temperature sensor is attached. Likewise, the welded joint between the stator and the temperature sensor may be particularly susceptible to damage or indeed to an undesired short circuit when the temperature sensor is removed.

[0011] The object of the present invention is to provide a design that allows temperature detection and simple replacement of temperature sensors at the interconnection mechanism for the stator.

[0012] This object is achieved according to the subject matter of the independent claims. Further aspects and further developments of the invention which may bring further advantages are described in the dependent claims, in the following description and in the associated illustrated drawings.

[0013] To this end, according to the present invention, an interconnection mechanism for a stator of an electric machine is provided. The interconnection mechanism comprises at least one busbar, which forms at least one segment of a connector ring having an external terminal and a winding terminal. The winding of the stator can be connected to the winding terminal. For example, power electronic equipment can be connected to the external terminal in order to drive or operate the stator winding. In this case, the contact elements of the external terminal and the winding terminal are arranged in an interconnection area formed in the circumferential direction of the connector ring segment. The current path of the interconnection mechanism passes through the interconnection area from the external terminal to the winding terminal.

[0014] Furthermore, the interconnection mechanism has a receiving element for the sensor, which is arranged outside the interconnection region on the connector ring segment. In this case, the receiving element is thermally coupled at least to the connector ring segment or the busbar in the interconnection region. In particular, the receiving element and the connector ring segment are provided to be formed in one piece. The arrangement of the receiving element outside the interconnection region can be an arrangement outside the interconnection region in the circumferential direction, in the axial direction or in the radial direction.

[0015] The receiving element can be an extension of a busbar or of a connecting conductor of the interconnection mechanism, the receiving element protruding beyond the interconnection area and / or protruding out of a housing surrounding the interconnection area or protruding from the interconnection area in the form of a branch. For example, the receiving element is formed by a rod onto which a sensor, in particular a temperature sensor, can be slid or pushed. Due to the thermal coupling, the temperature of the receiving element can be approximated to the temperature at the current path of the interconnection mechanism or substantially correspond thereto. Thus, the temperature of the stator with the interconnection mechanism can be measured or detected at the receiving element. The receiving element can, for example, be directly connected to the interconnection area or be arranged close to the interconnection area.

[0016] In this case, it is advantageous, for example, for the receiving element to be located outside the current path. Thus, the temperature sensor can be installed or replaced without the risk of damaging the contact points of the current path. Furthermore, in particular due to the protruding shape of the receiving element, which is freely accessible at least from one side, the temperature sensor can be simply attached to the receiving element, so that a direct replacement of the temperature sensor is also possible.

[0017] The busbars of the interconnection mechanism are formed, for example, from an electrically conductive material, in particular a metal. The busbars may, for example, comprise copper, a copper alloy, aluminum or an aluminum alloy. For example, a high level of thermal coupling or thermal conductivity between the interconnection region and the receiving element may advantageously be achieved in this way and / or the receiving element may be arranged simply and inexpensively at the same time. For example, the receiving element may thus also be electrically coupled to the interconnection region, but due to the electrically unloaded operation at the ends of the receiving element, the receiving element may be substantially dead (e.g. its current density during operation of the interconnection mechanism is less than 10% of the current density in the current path).

[0018] Thus, the proposed design for example presents the possibility of fastening the temperature sensor to an area of ​​the interconnection mechanism which is not provided for interconnection. This can be achieved by fastening the temperature sensor to an extension which protrudes specifically for connection purposes.

[0019] The receiving element extends, for example, in the circumferential direction of the connector segment. Alternatively or additionally, the receiving element can extend in the axial direction and / or in the radial direction of the connector segment. Thereby, the receiving element can be formed in such a way that access to the receiving element is obtained, in particular in the mounted state of the interconnection mechanism, in order to mount the temperature sensor directly on the receiving element. Therefore, one of the connecting conductors, for example a busbar, has at least one extension extending in the circumferential direction, in the radial direction and / or in the axial direction and / or extending away from the interconnection area at a given angle. The cross section of the extension can correspond to the cross section of the coil conductor, for example a stator winding, for example in order to better map the prevailing temperatures at the coil conductor.

[0020] For example, the receiving element comprises two receiving rods. In addition, a plurality of receiving elements or extensions can be provided on the connecting conductor or busbar, so that, for example, a plurality of temperature sensors for temperature measurement can be used. For example, a temperature sensor can be mounted on each of the two receiving rods to achieve redundant temperature detection.

[0021] The width of the extension or receiving rod can correspond to the width of the provided temperature sensor in order to orient the temperature sensor in an optimal manner and thus connect it to the receiving element in a thermally reproducible manner. This enables a particularly simple mounting of the temperature sensor.

[0022] The receiving element comprises, for example, at its end remote from the interconnection region, at least one retaining projection. The retaining projection may, for example, extend in a radial direction or in an axial direction. The retaining projection may improve the positioning of the temperature sensor and / or increase the stability of the fastening of the temperature sensor. For example, the profile of the receiving element has a shoulder at its free end, which serves for axial fastening and / or axial orientation of the fixing element (for example, the sensor housing) according to the connection variant provided for the temperature sensor. The receiving element may also, for example, comprise at least one notch, to which, for example, a clip-on housing of the temperature sensor may be fastened.

[0023] The housing of the interconnection means, which delimits the receiving element at the end facing the interconnection area, forms, for example, a limit stop for a sliding temperature sensor device. In this way, the mounting of the temperature sensor device on the interconnection means can be simplified, since the temperature sensor can be slid as far as the limit stop in order to be positioned as desired. The connecting conductors of the interconnection means, for example busbars forming the respective connector ring segments, can be insulated from one another, for example by means of a potting compound, for example can be partially or completely encapsulated in an injection-molded plastic. The extension outside the interconnection means is, for example, an area without potting compound or injection-molded encapsulation, so that the sensor head can be attached directly to the surface of the extension. Thus, the casting compound can provide a simple adjustment of the receiving limit stop for the temperature sensor.

[0024] One aspect of the invention relates to a temperature sensor device for sliding onto a receiving element of an interconnection mechanism, for example as described above. In this case, a temperature sensor of the temperature sensor device is arranged in a sensor housing comprising a hard component and / or a soft component. Furthermore, the sensor housing has an opening for receiving the receiving element, and the temperature sensor is arranged on a surface inside the opening. Thus, for example, when the temperature sensor device is in a slid-on state, the temperature sensor is automatically positioned, for example, in a predetermined, reproducible and / or standardized contact with the receiving element.

[0025] The housing is, for example, at least partially formed by a hard component, for example a thermoplastic. The housing can have a spring element for fixing the housing to the receiving element. The spring element can, for example, be fastened in the aforementioned recess in the receiving element.

[0026] Another option for fastening the temperature sensor to the receiving element is to use a soft component housing, for example comprising an elastomer. In this way, a flexible housing can be provided that can stably fasten the temperature sensor. The housing material can in particular have a high temperature resistance and / or a predetermined elastic modulus. Alternatively or additionally, a heat shrinkable sleeve can be used to fasten the temperature sensor to the receiving element. Due to the rod-shaped configuration of the receiving element with a free end, the temperature sensor can be simply replaced and refastened by means of a heat shrinkable sleeve without the need to isolate the electrical contacts.

[0027] One aspect of the invention relates to a system for detecting the temperature at a stator. The system comprises an interconnection mechanism having a receiving element arranged outside the interconnection region of the interconnection mechanism. The system also has a temperature sensor, wherein the temperature sensor is arranged in contact with the receiving element. In other words, the temperature sensor and the receiving element are thermally coupled. The system comprises, for example, the above-described interconnection mechanism and the above-described temperature sensor device. The temperature sensor is fastened to the receiving element, for example by a plastic housing that can be removed from the receiving element or by a heat-shrinkable sleeve.

[0028] For example, the interconnection mechanism can have three connecting conductors or connector ring segments, which are arranged in the axial direction or indeed in the radial direction relative to the stator coil so as to be connected to each other. Each connecting conductor has a contact point via which the coil conductor can be welded to the connecting conductor. For example, all contact points of the interconnection mechanism define an interconnection area. For example, exactly one of the three connecting conductors has a receiving element for a temperature sensor.

[0029] One aspect of the invention relates to a stator for an electric machine. In order to bring the windings of the stator (stator winding) into contact with a switchgear or power electronics for supplying power to the stator winding, the stator has an interconnection mechanism according to the above or below description. Furthermore, the invention relates to an electric machine with a stator, the electric machine comprising a corresponding interconnection mechanism, which is placed in contact with a power terminal, for example.

[0030] For example, the temperature can be measured at a plurality of different points of the stator. To measure the temperature, the temperature sensor can be fastened, for example, by means of a holder to an axial end face of a winding (eg a concentrated winding or a pull-in winding) and / or in an opening between two coils or winding coils.

[0031] Further developments of the system, stator and motor relate to further developed features as already described in conjunction with the interconnection mechanism or the slideable temperature sensor. Therefore, the description is not repeated and the corresponding features are considered to be also disclosed with respect to the system, stator and motor. Other aspects of the invention are also disclosed in conjunction with the following examples.

[0032] Several examples of the device are described in more detail below by way of example with reference to the accompanying drawings, in which:

[0033] Figure 1 An exemplary embodiment of an interconnect mechanism having a receiving element for a temperature sensor is shown;

[0034] Figure 2 is a plan view of an interconnection mechanism having a receiving element;

[0035] Figure 3An exemplary embodiment of an interconnect mechanism having a constrained receiving element for adjusting a temperature sensor is shown;

[0036] Figure 4 is a plan view of an interconnect mechanism having a constrained receiving element;

[0037] Figure 5 An exemplary embodiment of a temperature sensor in a housing that is slidable and includes a hard component is shown;

[0038] Figure 6 An exemplary embodiment of a temperature sensor in a housing that is slidable and includes a soft component is shown;

[0039] Figure 7 is a cross-sectional view of a temperature sensor in a housing that is slidable and includes a soft component;

[0040] Figure 8 is a schematic diagram of the rear portion of a housing for a temperature sensor;

[0041] Fig. 9 An exemplary embodiment of an interconnect mechanism having a receiving element and an attached temperature sensor is shown;

[0042] Fig.10 is a plan view of an interconnect mechanism having a receiving element and an attached temperature sensor;

[0043] Fig.11 is a cross-sectional view of a receiving element with an attached temperature sensor; and

[0044] Fig.12 An exemplary embodiment of a stator having an interconnection mechanism with a receiving element is shown.

[0045] Figure 1 An exemplary embodiment of an interconnection mechanism 10 with a receiving element 12 for fastening a temperature sensor is shown. The interconnection mechanism 10 has three busbars 14, 14a, 14b, each of which forms a connector ring segment with an external terminal 16, 16a, 16b and a winding terminal 18, 18a, 18b. The winding terminals 18, 18a, 18b each include four mutually insulated terminal lugs, with which a turn of the stator winding can be placed in contact in each case. The respective connector ring segment is accommodated in a housing 20, which fixes the connector ring segment and electrically insulates the connector ring segments from one another. The external terminals 16, 16a, 16b and the winding terminals 18, 18a, 18b are arranged in an interconnection region 22 of the interconnection mechanism 10. The interconnection region 22 is delimited circumferentially. The busbars 14, 14a, 14b are surrounded by the housing 20, for example, within the interconnection region 22.

[0046] The receiving element 12 is arranged on one of the busbars 14, 14a, 14b outside the interconnection area 22. The housing 20 does not surround the receiving element 12, for example. The receiving element 12 shown in this example is an extension of the busbar 14b. The receiving element 12 therefore forms a unit with the busbar 14b, and the receiving element is therefore also electrically conductive. In this case, the current path extends from the external terminal 16b of the busbar 14b through the interconnection area 22 to the coil terminal or winding terminal 18b, and no current path is formed in the receiving element 12. Because the receiving element 12 and the busbar 14b of the interconnection mechanism 10 are configured as one piece, a good thermal connection is obtained between the receiving element 12 and the busbar 14b. For example, the busbar 14b includes copper or aluminum, which not only provides electrical conductivity but also provides good thermal conductivity. This allows the temperature at the receiving element 12 of the busbar 14b to substantially correspond to the temperature of the connector ring segment of the busbar 14b in the interconnection area 22. Therefore, the temperature sensor attached to the receiving element 12 can detect the temperature of the contact area between the external terminal and the stator winding with a high level of accuracy.

[0047] The receiving element 12 of the exemplary embodiment is configured in two parts, with a first 12a and a second 12b of circumferentially extending rods respectively provided. This makes it possible, for example, to attach two separate temperature sensors to the receiving element 12. In addition, a marking point 13 is provided on the side of the receiving element 12 facing the housing 20. The marking point 13 can indicate to what extent the housing of the temperature sensor to be attached to the receiving element 12 can be pushed in the direction of the housing 20 of the interconnection mechanism, for example, during installation to achieve an optimal positioning of the temperature sensor.

[0048] The external terminals 16, 16a, 16b comprise fastening means to which, for example, a power electronics busbar or a power supply for the stator winding can be fastened by screw fixing or a plug-in connector. The turn ends of the stator winding can be fastened, for example, non-detachably to the terminal lugs of the winding terminals (for example by means of a welded joint).

[0049] Figure 2 is a plan view of an interconnection mechanism 10 with a receiving element 12. The figure reveals shoulders or projections 24a, 24b of the respective rods 12a, 12b formed in each case in radial direction on the receiving element 12. The projections 24a, 24b can be provided for fixing a push-on temperature sensor or for aligning a push-on temperature sensor.

[0050] Figure 3 An example of an interconnect mechanism 10 having a receiving element 12 comprising two rods 12a, 12b protruding separately from a housing 20 of the interconnect mechanism 10 is shown. Figure 3 and Figure 4In the example shown, the housing 20 of the interconnection mechanism is widened circumferentially at the receiving element 12. The widened portion is provided with a housing limit stop 26, the position of which can correspond to the position of the marking point 13 of the above example. By providing the housing limit stop 26, the installation of the temperature sensor on the receiving element 12 can be simplified. The temperature sensor can be pushed onto the receiving element 12 (or onto the corresponding rods 12a, 12b), for example, until the housing of the temperature sensor abuts against the limit stop 26.

[0051] Figure 5 An exemplary embodiment of a temperature sensor arrangement 50 is shown in a housing 52 that includes hard components. Figure 5 The temperature sensor device 50 is shown pushed onto the receiving element 12 of the interconnection mechanism 10 (see, for example, Figures 1 to 4 ). In the process, the housing 52 of the temperature sensor device 50 abuts against the housing limit stop 26 of the housing 20 of the interconnection mechanism 10. Within the housing 52 of the temperature sensor device 50, a temperature sensor 54 is arranged with a sensor head or sensor element 56. The temperature sensor 54 shown is, for example, an NTC (negative temperature coefficient) sensor.

[0052] The receiving element 12 is accommodated in an opening in the housing 52, which opening is geometrically adapted to the receiving element 12. The temperature sensor 54 forms the inner surface of the opening, so that the temperature sensor 54 is in direct contact with the receiving element 12. On the side of the housing 20 facing the interconnection mechanism 10, the housing 52 has a cable opening for leading out a cable 58 of the temperature sensor 54, which can be connected, for example, to a device for temperature evaluation. Figure 5 The temperature sensor device 50 shown in FIG. 5 shows the releasable fixing of the temperature sensor 54 by means of a plastic clip, where the housing 52 is configured as a plastic clip. The plastic clip may be at least partially composed of a thermoplastic plastic part.

[0053] The plastic clip 52 or the housing 52 is perpendicular to Figure 5 The configuration may be C-shaped or U-shaped in the plane shown and have a base region 52a and two legs 52b protruding perpendicularly from the base region, Figure 5 Only one leg can be seen in the cross-sectional view of . A slot is provided between the two legs 52 b, via which a temperature sensor 54 can be introduced from the side opposite to the base region 52. An opening can be formed on the receiving element 12 or on a projection of a connecting conductor or bus bar (for example on the receiving element 12), into which the leg 52 b of the plastic clip 52 can be inserted. A spring element 53 in the form of a spring tongue 53 is formed on the base region 52 a, via which the plastic clip 52 and the temperature sensor 54 accommodated therein are fixed to the receiving element 12.

[0054] Figure 6 An alternative possibility for connecting the temperature sensor 54 to the receiving element 12 of the connecting conductor is shown. In this case, a housing 60 is provided as a housing for accommodating the temperature sensor 54, which comprises a flexible plastic element (e.g. a soft component), such as an elastomer. The housing 60 is made of silicone, for example.

[0055] The housing 60 including the soft part is, for example, substantially of a cubic configuration and has an opening 62 whose cross section and / or length are adapted to the receiving element of the interconnection mechanism. The cross section of the opening 62 is, for example, smaller than the cross section of the receiving element 12, so that when the extension 12 is inserted into the opening 62, the elastomer is in a tensioned state, thereby fixing the housing 60 and the temperature sensor 54 to the receiving element 12. The rod 12a of the receiving element 12 can, for example, be accommodated in the opening 62. The housing 60 has a shaped portion 64, for example, which can simplify the installation of the housing 60 on the extension or the removal from the extension. Alternatively, the plastic element can have a cylindrical configuration.

[0056] Figure 7 6 is a cross-sectional view of a housing 60 with a temperature sensor 54 already mounted on an extension or receiving element 12. On one end face (e.g. the back side), the plastic element has an opening for introducing the temperature sensor 54, through which the cable 58 of the temperature sensor 54 can be guided, for example. On the other opposite end face, the plastic element has, for example, an open configuration (e.g. due to the opening 62) so that the plastic element together with the temperature sensor 54 already accommodated therein can be pushed onto the receiving element 12. In this case, the dimensions of the elastic plastic element are selected, for example, so that in the installed state there is a mechanical pretensioning, so that the temperature sensor 54 is pressed against the receiving element 12. The leg of the plastic element, on which the temperature sensor 54 is placed, has, for example, a retaining projection for supporting the cable 58 of the temperature sensor 54.

[0057] Figure 8 A schematic diagram of a rear part 66 of a housing (e.g., comprising a thermoplastic or an elastomer) for pushing onto the receiving element 12 of a temperature sensor 54 is shown. The figure shows an opening 68, through which the temperature sensor 54 can be introduced into the housing, for example, and which can also, for example, fix the cable 58 of the temperature sensor 54, so that the temperature sensor 54 does not change its position relative to the receiving element 12 even if mechanical tension is applied to the cable.

[0058] Fig. 9An exemplary embodiment of an interconnect mechanism 10 having temperature sensors 54a, b attached thereto is shown. Here, the temperature sensors 54a, b are fastened to the receiving element 12 of the interconnect mechanism 10 by means of heat shrinkable sleeves. The first temperature sensor 54a is fastened to the first rod of the receiving element 12 by means of a first heat shrinkable sleeve 70a. The second temperature sensor 54b is fastened to the second rod of the receiving element 12 by means of a second heat shrinkable sleeve 70b. The use of heat shrinkable sleeves can improve the contact of the respective temperature sensors 54a, b on the respective rods of the receiving element 12.

[0059] The corresponding connecting cables 58a, 58b of the temperature sensors 54a, b are led out of the heat-shrinkable sleeves 70a, 70b and connected to a common plug-in element 72 (e.g., also possible in embodiments with different sensor housings). Thus, the temperature sensors 54a, b can be connected to the evaluation electronics particularly easily, for example, via a plug-in connection.

[0060] Fig.10 The plan view shows the Fig. 9 Exemplary embodiment of the invention. The interconnection mechanism with installed temperature sensors 54a, b provides a system 74 for detecting the temperature, wherein replacing one or both temperature sensors 54a, b is particularly simple. In this respect, in the event of a defect in a temperature sensor, it is possible, for example, to loosen the corresponding heat-shrinkable sleeve 70a and replace the temperature sensor. In this respect, in particular, no work has to be performed in the interconnection region of the interconnection mechanism 10, so that even when a winding contact is made with respect to the stator winding (see Fig.12 ), the risk of damage to the corresponding contact points is also minimized.

[0061] Fig.11 2 is a cross-sectional view of a temperature sensor 54a having a sensor element 56 being fastened to a receiving element 12 by means of a heat shrinkable sleeve 70a. The receiving element 12 protrudes out of the housing 20 of the interconnection mechanism 10. The shrunken heat shrinkable sleeve 70a here presses the temperature sensor 54a onto the receiving element 12 and simultaneously fixes the sensor cable 58a of the temperature sensor 54 in place.

[0062] When the temperature sensor 54a is fastened using a heat shrink sleeve, the temperature sensor 54a is attached to the extension or receiving element 12 and is encapsulated with the extension 12 by the heat shrink sleeve 70a. For example, a heat gun can be used to shrink the hose to optimally fasten the sensor head to the receiving element 12. In addition, the inner surface of the heat shrink sleeve 70a can be configured to be self-adhesive to ensure additional fixation and / or simpler installation. The injection molded package of the interconnect mechanism 10 (e.g., housing 20) can define a stop point for positioning the heat shrink sleeve on the receiving element 12.

[0063] Fig.12 A stator 100 is shown with an interconnection mechanism 10. The stator has a stator winding 102 with turn ends 104 which are in electrical contact at respective terminal lugs of winding terminals 18, 18a, 18b of respective busbars of the interconnection mechanism 10. In this case, it is particularly evident that the contact between the interconnection mechanism 10 and the stator winding 102 is only achieved in the interconnection region 22. On the other hand, in the region of the receiving element 12, no contact is made with the stator winding 102, so that at the exposed extension 12, the temperature sensor device 50 can be attached and replaced to directly measure the temperature of the interconnection mechanism 10 or the stator 100.

[0064] The proposed means for fastening the temperature sensor can for example also simplify the initial installation of the temperature sensor. In this case, the fastening of the temperature sensor can be carried out for example when the stator is installed, as a step after the interconnection and impregnation of the stator. A number of different options for fastening the temperature sensor on the receiving element or the extension are proposed.

[0065] The invention proposes the concept of fastening the temperature sensor to an extension or receiving element of the connecting conductor arranged outside the interconnection area. Thus, if replacement is required, the temperature sensor can be directly separated from the extension, for example, wherein the risk of damage to the entire interconnection mechanism or in particular the electrical contacts is minimized.

[0066] List of Reference Numerals

[0067] 10 Interconnection institutions

[0068] 12 Receiving components

[0069] 12a, 12b Rod of receiving element

[0070] 13 Marking points

[0071] 14, 14a, 14b Busbar

[0072] 16, 16a, 16b External terminals

[0073] 18, 18a, 18b Winding terminals

[0074] 20 Interconnection mechanism housing

[0075] 22 Interconnection Areas

[0076] 24a, 24b Retention projections

[0077] 26 Shell limit stop

[0078] 50 Temperature sensor device

[0079] 52 housing of temperature sensor device

[0080] 52a Base region

[0081] 52b Legs

[0082] 53 Spring element

[0083] 54 Temperature Sensor

[0084] 54a, 54b Temperature sensor

[0085] 56 Sensor element

[0086] 58 Temperature sensor cable

[0087] 60 Temperature sensor housing

[0088] 62 opening for receiving a receiving element

[0089] 64 Forming part

[0090] 66 Rear

[0091] 68 Opening for fixing cables

[0092] 70a, 70b Heat Shrinkable Sleeve

[0093] 72 Plug-in components

[0094] 74 System for detecting temperature

[0095] 100 Stator

[0096] 102 stator winding

[0097] 104 Turn End

Claims

1. A stator (100) for an electric machine having an interconnection mechanism (10) for electrically interconnecting a stator coil with an external terminal by means of a connector ring, the interconnection mechanism (10) comprising: a temperature sensor receiving element (12) which is designed as a one-piece projection of a busbar (14) or of a connecting conductor of the interconnection device (10), wherein a temperature sensor (54) is fixed to the temperature sensor receiving element (12), and the temperature sensor (54) is in thermal contact with the temperature sensor receiving element (12) in order to detect the temperature of the temperature sensor receiving element, and the temperature sensor (54) is arranged in a sensor housing (52, 60) on the temperature sensor receiving element (12), It is characterized in that - the temperature sensor (54) is arranged in a sensor housing (52, 60) comprising hard and / or soft components, wherein the temperature sensor (54) and the sensor housing (52, 60) form a temperature sensor device (50), and The sensor housing (52, 60) has an opening (62) for accommodating the temperature sensor receiving element (12), and the temperature sensor (54) is arranged on a surface inside the opening (62), and The temperature sensor device (50) is plugged or pushed with its sensor housing (52, 60) onto the receiving rod, and the temperature sensor (54) is in thermal contact with the temperature sensor receiving element (12).

2. The stator (100) according to claim 1, characterized in that: The busbar (14) forms a connector ring segment having an external terminal (16) and a winding terminal (18), - wherein the contact elements of the external terminal (16) and the winding terminal (18) are arranged in an interconnection area (22) formed in the circumferential direction of the connector ring segment, wherein the current path of the interconnection mechanism (10) extends from the external terminal (16) through the interconnection area (22) to the winding terminal (18), Therein, the temperature sensor receiving element (12) is configured outside the interconnection region (22) on the connector ring segment.

3. The stator (100) according to claim 2, characterized in that: The temperature sensor receiving element extends in a circumferential direction of the connector ring segment.

4. The stator (100) according to claim 2, characterized in that: The temperature sensor receiving element (12) extends in the axial direction and / or radial direction of the connector ring segment.

5. The stator (100) according to any one of claims 1 to 4, characterized in that: The temperature sensor receiving element (12) has two receiving rods (12a, 12b).

6. The stator (100) according to claim 2, characterized in that: The temperature sensor receiving element (12) has at least one retaining protrusion (24a) at its end remote from the interconnection region (22).

7. The stator (100) according to any one of claims 1 to 4, characterized in that: The interconnection mechanism (10) forms a housing (20) having a limit stop (26) for a sensor housing (52) of a temperature sensor device (50).

8. The stator (100) according to any one of claims 1 to 4, characterized in that: The sensor housing (52) is formed at least partially from a hard component and has a spring element (53) for fixing the sensor housing (52) on the temperature sensor receiving element (12).

9. The stator (100) according to any one of claims 1 to 4, characterized in that: The sensor housing (52, 60) is designed as a plastic sensor housing (52, 60) which can be removed from the temperature sensor receiving element (12).

10. An electric machine comprising a stator (100) according to any one of claims 1 to 9.

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