EP4029127A1 - Electrical machine - Google Patents

Electrical machine

Info

Publication number
EP4029127A1
EP4029127A1 EP20750588.4A EP20750588A EP4029127A1 EP 4029127 A1 EP4029127 A1 EP 4029127A1 EP 20750588 A EP20750588 A EP 20750588A EP 4029127 A1 EP4029127 A1 EP 4029127A1
Authority
EP
European Patent Office
Prior art keywords
detection device
sensor
rotor
housing
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20750588.4A
Other languages
German (de)
French (fr)
Inventor
Andreas Ruppert
Michael Marsetz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP4029127A1 publication Critical patent/EP4029127A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes

Definitions

  • the invention relates to an electrical machine with a stator and a rotor rotatable relative to the stator, a temperature detection device for detecting a temperature of the stator comprising a temperature sensor and a rotor detection device for detecting a speed and / or rotational position of the rotor comprising a rotor condition detection sensor.
  • Such an electrical machine is used, for example, to drive a motor vehicle such as a car, truck, bus or other commercial vehicle. It can be connected to a drive train, or it can serve as a hub drive for a hybrid vehicle or an electric vehicle.
  • a known electrical Ma machine, as used in hybrid vehicles is known, for example, from DE 10 2017 116232 A1, where a hybrid module for a drive train of a motor vehicle with a rotor position sensor and a temperature sensor is disclosed.
  • a sensor for detecting rotor information in relation to the speed or the rotational position relative to the stator i.e. rotation and / or angle information, for which purpose a corresponding rotor condition detection sensor is used as part of a rotor detection device.
  • a tem perature sensor is used as part of a temperature detection device, which is used to detect a temperature of the stator, an NTC or PTC resistance element being predominantly used as the sensor.
  • the invention is based on the problem of specifying a comparatively improved electrical cal machine.
  • the invention provides for an electrical machine of the type mentioned at the outset that the temperature detection device and the rotor detection device are connected to form a common assembly, the temperature detection device having a sensor section that can be moved via at least one spring element between two end positions and encompasses the temperature sensor .
  • the temperature detection device and the rotor detection device are a common assembly, which extremely simplifies the assembly effort. Because it is only this one assembly to assemble in order to position both detection devices on the stator side. This means that now after the assembly of the stator of the electrical machine in a machine housing and after assembly of the rotor, which has a component detected by the stator-side rotor condition detection sensor, the one-piece sensor system is assembled as a whole including the rotor condition sensor and the temperature sensor, for example on the Electric machine cover. In addition to the simplified assembly, which can also be automated, there are fewer tolerances due to the reduced number of components, which is advantageous with regard to correct positioning of the sensors.
  • the temperature sensor is not is fixedly mounted on the assembly, but movable.
  • the temperature sensor is arranged on a sensor section, which is movable relative to the entire assembly or an assembly housing or the like.
  • at least one spring element is used to move the sensor section between two end positions.
  • the temperature sensor or the sensor section is spring-loaded via the at least one spring element, so that on the one hand it can be moved relative to the component or the component housing, but on the other hand the temperature sensor can also be brought into contact with the component to be detected with a defined compressive force. It is useful if two spring elements resilient to the sensor section are provided, on the one hand to achieve a sufficiently high pressure force and a symmetrical application of force, and on the other hand, in the event of failure of one spring element, to continue to use the temperature sensor via the second redundant spring element to spring into the correct position.
  • the sensor section is preferably movable radially relative to the assembly.
  • the construction group itself is, as described, preferably arranged on a cover of the machine housing or the stator, and in this case preferably in the area of the winding head, so for example at an axial end of the hairpin or rod shaft winding, to the winding area directly Measure temperature.
  • the construction group whose housing, following the cylindrical winding geometry, z. B. is designed like a circular segment, preferably positioned within the winding or the winding head, so that the sensor section is movable in this case radially outward from the outer circumference of the component or component housing. If the assembly is arranged radially outside the winding or the winding head, the sensor section would of course be movable radially inward.
  • the temperature detection device itself expediently has a housing from which and into which the sensor section can be moved.
  • the temperature detection device is thus largely encapsulated, with the sensor section on which the temperature sensor is arranged, despite its mobility, being largely or completely sealed on the housing of the temperature detection device.
  • the housing of the temperature detection device can be in one piece with the housing of the rotor detection device, that is to say that the assembly has a common housing.
  • the housing of the temperature detection device is detachably arranged on a housing of the rotor detection device and electrically coupled to connection elements provided there and assigned to a downstream electrical or electronic device.
  • the assembly consists of two separate housings that can each be detachably connected to one another, namely on the one hand the temperature detection device housing and on the other hand the rotor detection device housing.
  • a detachable electrical coupling of the temperature sensor with this downstream device is provided by the housing of the Temperature detection device corresponding contact elements are provided which are automatically coupled to corresponding connection elements on the housing of the Ro tor detection device when the two housings are joined. This means that the electrical connection is automatically closed when the two housings are connected.
  • the housing of the temperature detection device can have a coupling section with a U-shaped cross section, on which the contact elements for electrically connecting the temperature sensor to the connection elements, which are attached to a connection section of the housing of the rotor detection device to be received in the coupling section. are arranged, provided, or vice versa.
  • the housing of the temperature detection device preferably has an encompassing plug-in coupling section into which a corresponding, for example flat, connecting section of the housing of the rotor detection device is inserted, the corresponding contact and connection elements being seen in the overlap area.
  • a connection to the downstream electrical or electronic device, which is used for signal transmission or the power supply of the temperature sensor is formed.
  • the geometric design of the two housings can of course also be reversed, i.e. the housing of the rotor detection device has the U-shaped connecting section into which the then rather flat coupling section of the housing of the temperature sensor device is inserted.
  • the temperature sensor is electrically coupled to a downstream electrical or electronic device via the electrically conductive spring element or elements.
  • the spring elements are responsible for the springing and thus the movement of the sensor section.
  • the or who the spring elements are integrated into the electrical line connection are therefore part of the signal or power line path by electrically coupling the temperature sensor with the electrical or electronic device connected downstream. This is particularly useful as it eliminates the need for any separate cable connection can, as far as the transition from the movable sensor section to fixed-position connections or lines within the component group is affected.
  • the temperature sensor is connected to one or two sensor-side contact shoes on which the spring element or elements are electrically contacted. Since the temperature sensor usually has a two-wire line, two sensor-side contact shoes are preferably provided, in which case two separate spring elements, one each for the corresponding line path, are provided, which are then each coupled to a corresponding connection element at the other end.
  • the spring element or elements are electrically contacted at the other end on one or another contact shoe that can be coupled to the connection elements on the housing of the rotor position detection device. Accordingly, one or two corresponding contact shoes are also provided at this end, so that there are defined connection conditions for the respective spring elements, with the contact shoe or shoes being coupled directly to corresponding connection elements on the housing of the rotor position detection device, and regardless of whether a common assembly housing is provided or separate, detachable housing.
  • the or each spring element itself is preferably designed as a helical spring, which can easily be designed as an electrically conductive element.
  • the or each spring element is also conceivable to design the or each spring element as an elastomer component, in particular a silicone, in which case the elastomer component is to be given a corresponding conductivity in the event that the electrical coupling is also to take place via this elastomer component.
  • Figure 1 is a partial view of an electrical machine according to the invention with the end housing cover and stator winding and not yet mounted assembly,
  • FIG. 2 shows the arrangement from FIG. 1 with the assembly mounted on the cover, inside for winding
  • FIG. 3 shows an enlarged partial view from FIG. 2 in the area of the contact of the sensor section of the temperature detection device having the temperature sensor on the winding
  • FIG. 4 is a perspective view of the temperature detection device with the sensor section fully extended
  • FIG. 5 shows the temperature detection device from FIG. 4 with a partially retracted sensor section
  • FIG. 6 shows the temperature detection device with the sensor section fully retracted
  • FIG. 7 is a partially sectioned perspective view of the temperature detection device from FIG. 5, and FIG.
  • Figure 8 is a perspective view of the rotor detection device.
  • FIG. 1 shows a partial view of an electrical machine 1 according to the invention, as it can be used, for example, for driving a motor vehicle, in an exploded view.
  • the electric machine naturally also includes a corresponding rotor which can be rotated within the stator and which is occupied with corresponding magnets and which can be rotated via a traveling electric field generated by the winding 4 .
  • an assembly 6 is provided, which comprises both a temperature detection device 7 and a rotor detection device 8.
  • the temperature detection device 7 is used to detect a temperature of the stator, in front of a temperature on the winding 4.
  • the rotor detection device 8 which has a corresponding rotor position sensor that detects a component arranged on the rotor and rotating with it, is used to detect the speed and / or the rotational position of the rotor relative to the stator 2.
  • the functions of the two separate devices are also well known.
  • Both devices 7, 8 are part of a common assembly 6, which is to be assembled as a one-piece component, although the two devices 7, 8 are detachable from each other, i.e. both have separate housings which, as will be discussed below, are detachably attached to each other can be.
  • the temperature detection device 7 comprises, as will be discussed below, a temperature sensor, while the rotor detection device 8 comprises a rotor state sensor. Both deliver corresponding sensor signals and are also to be supplied with power, for which purpose a corresponding plug connector 9 is provided on the assembly 6, to which a connector 10 is to be plugged in, from the connecting lines 11 to a downstream electrical or electronic device that handles the signal processing or serve for control or power supply, run.
  • FIG. 2 shows the arrangement from FIG. 1, the assembly 6 being mounted on the cover 3 of the stator 2 here.
  • the assembly 6 is set in the inner circumference of the winding 4 respec tive of the winding head 5 and fixed in position on the cover 3 with corresponding connecting screws 12 which are screwed into corresponding threaded holes in the cover 3.
  • the rotor detection device and the rotor condition detection sensor are positioned accordingly in order to interact with the component on the rotor side.
  • the temperature sensor of the temperature detection device 7 is also correctly positioned after the assembly 6 has been installed and, in the example shown, is brought into defined contact with the inner circumference of the end winding 5, as FIG. 3 in particular shows.
  • a Sensorab section 13 is provided on the temperature sensor detection device 7, which is movable relative to the assembly 6, in the case shown, it is movable radially outward relative to the assembly 6.
  • the temperature sensor usually a PTC or NTC resistance element, is arranged at the end of this sensor section 13 and is preferably injected or pressed in there.
  • a corresponding protective layer for example made of an elastomer such as a silicone elastomer or the like.
  • a corresponding protective layer for example made of an elastomer such as a silicone elastomer or the like.
  • it is brought into direct contact with the winding head 5 by springing the sensor section 13, which will be discussed below, via two spring elements and is pressed radially outwards. Because of this radial mobility, it is possible to bridge larger distances from the winding head 5 and at the same time bring the temperature sensor into a defined system.
  • FIGS. 4-6 show the temperature detection device 7, which has a housing 14, which here has a cylindrical section 15, in and out of which the likewise cylindrical sensor section 13 can be moved.
  • the temperature sensor 16 is located at the lower, free, leading end of the sensor section 13.
  • the sensor section 13 is fully extended, a stop element 17, which extends through a longitudinal slot 18 in the cylindrical housing section 15, is moved towards the lower end of the slot.
  • FIG. 5 shows the temperature detection device 7 with the sensor section 13 partially retracted into the housing section 15; the stop element 17 is in a central position in the slot 18.
  • FIG. 6 shows the temperature detection device 7 with the sensor section 13 retracted almost completely into the cylindrical housing section 15, the stop element 17 being in the stop at the upper end of the slot.
  • the stop element 17 and the slot 18 have two defined end positions, namely the maximum extended and maximum retracted positions, between which the sensor section 13 and the temperature sensor 16 can be moved is.
  • This shift length enables a considerable tolerance-related distance s to compensate for the contact surface on the end winding 5.
  • the temperature detection device 7 and the rotor detection device 8 are detachable from one another, for which purpose the temperature detection device 7 has a housing 14 and the rotor detection device 8 has a corresponding housing 30.
  • the temperature detection device 7 or the housing 14 has a coupling section 19 which is U-shaped in cross section and has two legs 20, on the inner sides of which two contact elements 21 (which are shown in FIGS. 4-6 and 7 in part by dashed lines) are provided.
  • the rotor detection device 8 or its housing 30 has a connecting section 22, see FIG. 8, which is designed and dimensioned in such a way that it can be pushed between the legs 20, that is, into the U-shaped coupling section 19.
  • a connecting section 22 On the connecting section 22, two connection elements 23 are provided on both sides, which are automatically contacted with one another when the housings 14 and 30 are pushed together, so that the two housings are electrically connected to one another. Since the two contact elements 21 are also electrically connected to the temperature sensor 16 at the same time, there is consequently an electrical connection between the temperature sensor 16 and the connection elements 23, which in turn are connected to corresponding contacts in the area of the plug connection 9, so that ultimately the Temperature sensor 16 is coupled to the downstream electrical or electronic device.
  • FIG. 7 shows a sectional view through the temperature detection device 7, the cylindrical housing section 15 as well as the sensor section 13 being shown cut here.
  • the temperature sensor 16 for example an NTC resistance element, sometimes also called an NTC bead, which z. B. in silicone is embedded for protection purposes, arranged.
  • the temperature sensor 16 is here connected to two contact shoes 25 via two connecting lines 24.
  • the contact shoes 25 are attached to the sensor section 13.
  • two electrically conductive spring elements 26 are provided here in the form of helical springs 27, the lower end of which bear against the contact shoes 25, that is to say spring them down.
  • the other ends of the spring elements 26 are supported meet on further contact shoes 28, which contact shoes 28 are fixed in the housing 14 and with the two con tact elements 21 are connected.
  • the two spring elements 26 have a double function. On the one hand, they spring on the sensor section 13, that is to say press it continuously out of the housing 14, as it were. The sensor section 13 can be pressed into the housing section 15 against the restoring force of the spring elements 26. On the one hand, the automatic positioning of the sensor section 13 and thus of the temperature sensor 16 with respect to the component to be detected in terms of its temperature, here the end winding 5 and a defined contact contact, is ensured on the one hand.
  • the two spring elements 26 also serve as the second function as electrically conductive transmission elements after they electrically connect the contact shoes 25 and 28 to one another.
  • the spring elements 26 are made of a conductive material, usually metal, so that signal transmission from the temperature sensor to the downstream electrical or electronic device and vice versa, as well as a power supply or the like, is possible via this. Any cable connection is therefore not required in this area.
  • a helical spring 27 as the spring element 26
  • an electrically conductive elastomer element for example made of a silicone elastomer, which fulfills the tasks of resilience and electrical line connection.
  • FIG. 7 shows a lug 29 which is used to assemble the housing 14 on the housing 30, that is to say as assembly coding in a corresponding guide groove is introduced into the housing 30, so that an exact position arrangement of the housing 14 on the housing 30 is possible.
  • the electrical machine according to the invention has a number of advantages over known electrical machines. This means that there is less assembly effort due to the use of only one assembly containing the two detection devices, and fewer screw connections have to be set. In particular, an automatic assembly process is possible. Due to the lower number of components, fewer tolerances have to be compensated. Any tolerances in the area of the positioning of the temperature sensor are compensated for by the integrated elasticity or suspension of the sensor section, including the temperature sensor. Only one cable duct is also required, since a common plug connection is provided to connect the two detection devices to a downstream electrical or electronic device via just one, for example, 8-pin connector. Finally, since only one assembly is positioned, fewer machining operations must be carried out on the relevant components, in particular the cover to which the assembly is attached. Another important advantage is that no separate lines have to be provided for connecting the temperature sensor to the downstream electronic or electrical device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

The invention relates to an electrical machine, comprising: a stator (2); a rotor, which can be rotated relative to the stator (2); a temperature-sensing device (7) for sensing a temperature of the stator (2), which temperature-sensing device comprises a temperature sensor (16); and a rotor-sensing device (8) for sensing the rotational speed and/or rotational position of the rotor, which rotor-sensing device comprises a rotor-state-sensing sensor, the temperature-sensing device (7) and the rotor-sensing device (8) being connected to form a common assembly (6), the temperature-sensing device (7) having a sensor portion (13), which can be moved between two end positions by means of at least one spring element (26) and which comprises the temperature sensor (16).

Description

Elektrische Maschine Electric machine
Die Erfindung betrifft eine elektrische Maschine, mit einem Stator und einem relativ zum Stator drehbaren Rotor, einer Temperaturerfassungseinrichtung zur Erfassung einer Temperatur des Stators umfassend einen Temperatursensor und einer Rotorer fassungseinrichtung zur Erfassung einer Drehzahl und/oder Drehposition des Rotors umfassend einen Rotorzustandserfassungssensor. The invention relates to an electrical machine with a stator and a rotor rotatable relative to the stator, a temperature detection device for detecting a temperature of the stator comprising a temperature sensor and a rotor detection device for detecting a speed and / or rotational position of the rotor comprising a rotor condition detection sensor.
Eine solche elektrische Maschine kommt beispielsweise als Antrieb eines Kraftfahr zeugs wie eines Pkws, Lkws, Busses oder eines sonstigen Nutzfahrzeuges zum Ein satz. Sie kann in einen Antriebsstrang geschaltet sein, oder als Nabenantrieb eines Hybridfahrzeugs oder eines Elektrofahrzeugs dienen. Eine bekannte elektrische Ma schine, wie sie in Hybridfahrzeugen eingesetzt wird, ist beispielsweise aus DE 10 2017 116232 A1 bekannt, wo ein Hybridmodul für einen Antriebsstrang eines Kraft fahrzeugs mit einem Rotorlagesensor und einem Temperatursensor offenbart ist. Such an electrical machine is used, for example, to drive a motor vehicle such as a car, truck, bus or other commercial vehicle. It can be connected to a drive train, or it can serve as a hub drive for a hybrid vehicle or an electric vehicle. A known electrical Ma machine, as used in hybrid vehicles, is known, for example, from DE 10 2017 116232 A1, where a hybrid module for a drive train of a motor vehicle with a rotor position sensor and a temperature sensor is disclosed.
Es kommen also bei bekannten Anwendungen bereits verschiedene Sensoren zum Einsatz, die unterschiedliche, für den Betrieb der elektrischen Maschine relevante Pa rameter erfassen. Zum einen ein Sensor zur Erfassung einer Rotorinformation in Be zug auf die Drehzahl oder die Drehposition relativ zum Stator, also einer Rotations und/oder Winkelinformation, wozu ein entsprechender Rotorzustandserfassungs sensor als Teil einer Rotorerfassungseinrichtung dient. Zum anderen kommt ein Tem peratursensor als Teil einer Temperaturerfassungseinrichtung zum Einsatz, der dazu dient, eine Temperatur des Stators zu erfassen, wobei als Sensor überwiegend ein NTC- oder PTC-Widerstandselement verwendet wird. So there are already different sensors used in known applications that detect different parameters relevant to the operation of the electrical machine. On the one hand, a sensor for detecting rotor information in relation to the speed or the rotational position relative to the stator, i.e. rotation and / or angle information, for which purpose a corresponding rotor condition detection sensor is used as part of a rotor detection device. On the other hand, a tem perature sensor is used as part of a temperature detection device, which is used to detect a temperature of the stator, an NTC or PTC resistance element being predominantly used as the sensor.
Um Einflüssen von Torsion und Toleranzen im Betrieb auf die Sensoren zu minimie ren, werden diese so nah wie möglich an der elektrischen Maschine respektive an den zu sensierenden Bauteilen angebracht, wobei zumeist eine Integration in ein Gehäuse der elektrischen Maschine stattfindet. Es hat sich dabei jedoch als nachteilig heraus gestellt, dass die Sensoren üblicherweise einzeln mit ihrem Gehäuse, beispielsweise über Schraubverbindungen, verbunden werden müssen, das heißt, dass jeder Sensor respektive jede Erfassungseinrichtung ein separates Bauteil ist, das auch separat zu montieren ist. Dadurch besteht ein relativ hoher Montageaufwand. Des Weiteren exis tieren für die Spulen der elektrischen Maschine verschiedene Wicklungstechnologien, beispielsweise die Hairpin- oder Stabwellen-Wicklung. Diese Wicklungstechnologien führen zu sehr eng gewickelten Wicklungen, was es schwierig gestaltet, den Tempe ratursensor direkt an oder in der Wicklung anzuordnen, so dass oft der Sensor beab- standet zur Wicklung anzuordnen ist, mithin also die Wicklungstemperatur nur indirekt misst. In order to minimize the effects of torsion and tolerances on the sensors during operation, they are attached as close as possible to the electrical machine or to the components to be sensed, with integration in a housing of the electrical machine usually taking place. However, it has been found to be disadvantageous that the sensors usually have to be connected individually to their housing, for example via screw connections, that is to say that each sensor or each detection device is a separate component that must also be installed separately. This results in a relatively high installation effort. There are also various winding technologies for the coils of the electrical machine, for example hairpin or bar wave winding. These winding technologies lead to very tightly wound windings, which makes it difficult to arrange the temperature sensor directly on or in the winding, so that the sensor often has to be arranged at a distance from the winding, ie it only measures the winding temperature indirectly.
Der Erfindung liegt das Problem zugrunde, eine demgegenüber verbesserte elektri sche Maschine anzugeben. The invention is based on the problem of specifying a comparatively improved electrical cal machine.
Zur Lösung dieses Problems ist bei einer elektrischen Maschine der eingangs ge nannten Art erfindungsgemäß vorgesehen, dass die Temperaturerfassungseinrichtung und die Rotorerfassungseinrichtung zu einer gemeinsamen Baugruppe verbunden sind, wobei die Temperaturerfassungseinrichtung einen über wenigstens ein Fe derelement zwischen zwei Endpositionen bewegbaren, den Temperatursensor umfas senden Sensorabschnitt aufweist. To solve this problem, the invention provides for an electrical machine of the type mentioned at the outset that the temperature detection device and the rotor detection device are connected to form a common assembly, the temperature detection device having a sensor section that can be moved via at least one spring element between two end positions and encompasses the temperature sensor .
Erfindungsgemäß ist zum einen vorgesehen, die Temperaturerfassungseinrichtung und die Rotorerfassungseinrichtung als eine gemeinsame Baugruppe auszulegen, was den Montageaufwand extrem vereinfacht. Denn es ist lediglich diese eine Bau gruppe zu montieren, um beide Erfassungseinrichtungen statorseitig zu positionieren. Das heißt, dass nunmehr nach der Montage des Stators der elektrischen Maschine in ein Maschinengehäuse sowie nach der Montage des Rotors, der ein durch den stator seitigen Rotorzustandserfassungssensor erfasstes Bauteil aufweist, das einteilige Sensorsystem gesamtheitlich inklusive des Rotorzustandsensors und des Tempera tursensors montiert wird, beispielsweise am Deckel der elektrischen Maschine. Neben der vereinfachten Montage, die auch automatisiert erfolgen kann, sind aufgrund der reduzierten Bauteileanzahl weniger Toleranzen gegeben, was im Hinblick auf eine korrekte Positionierung der Sensoren von Vorteil ist. According to the invention, it is provided on the one hand to design the temperature detection device and the rotor detection device as a common assembly, which extremely simplifies the assembly effort. Because it is only this one assembly to assemble in order to position both detection devices on the stator side. This means that now after the assembly of the stator of the electrical machine in a machine housing and after assembly of the rotor, which has a component detected by the stator-side rotor condition detection sensor, the one-piece sensor system is assembled as a whole including the rotor condition sensor and the temperature sensor, for example on the Electric machine cover. In addition to the simplified assembly, which can also be automated, there are fewer tolerances due to the reduced number of components, which is advantageous with regard to correct positioning of the sensors.
In Bezug auf die korrekte Positionierung respektive Kontaktierung des Temperatur sensors ist erfindungsgemäß weiterhin vorgesehen, dass der Temperatursensor nicht fest an der Baugruppe montiert ist, sondern beweglich. Hierzu ist der Temperatur sensor an einem Sensorabschnitt angeordnet, der relativ zu der gesamten Baugruppe respektive einem Baugruppengehäuse oder dergleichen beweglich ist. Hierzu dient wenigstens ein Federelement, um den Sensorabschnitt zwischen zwei Endpositionen zu bewegen. Über diese Beweglichkeit besteht die Möglichkeit, extrem flexibel auf et waige Toleranzen reagieren zu können, da diese mühelos ausgeglichen werden kön nen, so dass der Temperatursensor stets korrekt in unmittelbare Anlage an das in sei ner Temperatur zu erfassende Bauteil positioniert werden kann. Das heißt, dass bei der Montage der Baugruppe letztlich lediglich bei der Positionierung des Rotorzu standsensor möglichst positionsgenau gearbeitet werden muss, während bei der Posi tionierung des Temperatursensors ein hohes Maß an Flexibilität im Hinblick auf einen Spiel- oder Abstandsausgleich gegeben ist. With regard to the correct positioning or contacting of the temperature sensor, it is further provided according to the invention that the temperature sensor is not is fixedly mounted on the assembly, but movable. For this purpose, the temperature sensor is arranged on a sensor section, which is movable relative to the entire assembly or an assembly housing or the like. For this purpose, at least one spring element is used to move the sensor section between two end positions. This mobility makes it possible to react extremely flexibly to any tolerances, as these can be easily compensated so that the temperature sensor can always be correctly positioned in direct contact with the component to be detected in its temperature. This means that when assembling the assembly, only the positioning of the rotor status sensor has to be carried out as precisely as possible, while the positioning of the temperature sensor provides a high degree of flexibility with regard to clearance or distance compensation.
Wie beschrieben ist der Temperatursensor respektive der Sensorabschnitt über das wenigstens eine Federelement angefedert, so dass es einerseits relativ zum Bauteil respektive dem Bauteilgehäuse bewegt werden kann, andererseits aber auch der Temperatursensor mit einer definierten Druckkraft in Anlage an das zu erfassende Bauteil gebracht werden kann. Zweckmäßig ist es, wenn zwei den Sensorabschnitt anfedernde Federelemente vorgesehen sind, um einerseits eine hinreichend hohe Andruckkraft und eine symmetrische Kraftbeaufschlagung zu realisieren, und um an dererseits im Falle eines Versagens des einen Federelements über das zweite, re dundante Federelement den Temperatursensor nach wie vor in die korrekte Position anzufedern. As described, the temperature sensor or the sensor section is spring-loaded via the at least one spring element, so that on the one hand it can be moved relative to the component or the component housing, but on the other hand the temperature sensor can also be brought into contact with the component to be detected with a defined compressive force. It is useful if two spring elements resilient to the sensor section are provided, on the one hand to achieve a sufficiently high pressure force and a symmetrical application of force, and on the other hand, in the event of failure of one spring element, to continue to use the temperature sensor via the second redundant spring element to spring into the correct position.
Bevorzugt ist der Sensorabschnitt radial relativ zu der Baugruppe bewegbar. Die Bau gruppe selbst wird, wie beschrieben, bevorzugt an einem Deckel des Maschinenge häuses bzw. des Stators angeordnet, und hierbei bevorzugt im Bereich des Wick lungskopfes, also beispielsweise an einem axialen Ende der Hairpin- oder Stabwellen- Wicklung, um unmittelbar am Wicklungsbereich die Temperatur zu messen. Um die elektrische Maschine möglichst kompakt und kleinformatig zu bauen, wird die Bau gruppe, deren Gehäuse, der zylindrischen Wicklungsgeometrie folgend, z. B. kreisbo gensegmentartig ausgeführt ist, bevorzugt innerhalb der Wicklung respektive des Wicklungskopfes positioniert, so dass der Sensorabschnitt in diesem Fall radial nach außen aus dem Außenumfang des Bauteils respektive Bauteilgehäuses beweglich ist. Wird die Baugruppe radial außerhalb der Wicklung respektive des Wicklungskopfes angeordnet, so wäre der Sensorabschnitt natürlich radial nach innen bewegbar. The sensor section is preferably movable radially relative to the assembly. The construction group itself is, as described, preferably arranged on a cover of the machine housing or the stator, and in this case preferably in the area of the winding head, so for example at an axial end of the hairpin or rod shaft winding, to the winding area directly Measure temperature. In order to build the electrical machine as compact and small as possible, the construction group, whose housing, following the cylindrical winding geometry, z. B. is designed like a circular segment, preferably positioned within the winding or the winding head, so that the sensor section is movable in this case radially outward from the outer circumference of the component or component housing. If the assembly is arranged radially outside the winding or the winding head, the sensor section would of course be movable radially inward.
Die Temperaturerfassungseinrichtung selbst weist zweckmäßigerweise ein Gehäuse auf, aus dem und in das der Sensorabschnitt bewegbar ist. Die Temperaturerfas sungseinrichtung ist damit größtenteils gekapselt, wobei auch der Sensorabschnitt, an dem der Temperatursensor angeordnet ist, trotz seiner Beweglichkeit weitestgehend oder vollständig abgedichtet am Gehäuse der Temperaturerfassungseinrichtung an geordnet ist. The temperature detection device itself expediently has a housing from which and into which the sensor section can be moved. The temperature detection device is thus largely encapsulated, with the sensor section on which the temperature sensor is arranged, despite its mobility, being largely or completely sealed on the housing of the temperature detection device.
Dabei kann das Gehäuse der Temperaturerfassungseinrichtung einstückig mit dem Gehäuse der Rotorerfassungseinrichtung sein, das heißt, dass die Baugruppe ein gemeinsames Gehäuse aufweist. Alternativ und erfindungsgemäß bevorzugt jedoch ist das Gehäuse der Temperaturerfassungseinrichtung lösbar an einem Gehäuse der Rotorerfassungseinrichtung angeordnet und mit dort vorgesehenen, einer nachge schalteten elektrischen oder elektronischen Einrichtung zugeordneten Anschlussele menten elektrisch gekoppelt. Das heißt, dass die Baugruppe aus zwei separaten, je doch lösbar miteinander verbindbaren Gehäusen besteht, nämlich zum einen dem Temperaturerfassungseinrichtungsgehäuse, zum anderen dem Rotorerfassungsein richtungsgehäuse. Da natürlich die Signale, die der Temperatursensor liefert, an eine nachgeschaltete elektrische oder elektronische Einrichtung, üblicherweise eine ent sprechende Steuerungs- oder Verarbeitungseinrichtung, zu geben sind, ist auch eine lösbare elektrische Kopplung des Temperatursensors mit dieser nachgeschalteten Einrichtung vorgesehen, indem an dem Gehäuse der Temperaturerfassungseinrich tung entsprechende Kontaktelemente vorgesehen sind, die beim Fügen beider Ge häuse automatisch mit entsprechenden Anschlusselementen am Gehäuse der Ro torerfassungseinrichtung gekoppelt werden. Das heißt, dass die elektrische Verbin dung automatisch beim Verbinden der beiden Gehäuse geschlossen wird. The housing of the temperature detection device can be in one piece with the housing of the rotor detection device, that is to say that the assembly has a common housing. Alternatively and preferably according to the invention, however, the housing of the temperature detection device is detachably arranged on a housing of the rotor detection device and electrically coupled to connection elements provided there and assigned to a downstream electrical or electronic device. This means that the assembly consists of two separate housings that can each be detachably connected to one another, namely on the one hand the temperature detection device housing and on the other hand the rotor detection device housing. Since, of course, the signals that the temperature sensor delivers to a downstream electrical or electronic device, usually a corresponding control or processing device, are to be given, a detachable electrical coupling of the temperature sensor with this downstream device is provided by the housing of the Temperature detection device corresponding contact elements are provided which are automatically coupled to corresponding connection elements on the housing of the Ro tor detection device when the two housings are joined. This means that the electrical connection is automatically closed when the two housings are connected.
Erfindungsgemäß kann für ein einfaches, jedoch sicheres Verbinden das Gehäuse der Temperaturerfassungseinrichtung einen im Querschnitt U-förmigen Koppelabschnitt aufweisen, an dem die Kontaktelemente zum elektrischen Verbinden des Temperatur sensors mit den Anschlusselementen, die an einem im Koppelabschnitt aufzuneh menden Verbindungsabschnitt des Gehäuses der Rotorerfassungseinrichtung ange- ordnet sind, vorgesehen sind, oder umgekehrt. Das heißt, dass bevorzugt das Gehäu se der Temperaturerfassungseinrichtung einen umgreifenden Einsteck- Koppelabschnitt aufweist, in den ein entsprechender, beispielsweise flächiger Verbin dungsabschnitt des Gehäuses der Rotorerfassungseinrichtung eingeschoben wird, wobei im Übergriffsbereich die entsprechenden Kontakt- und Anschlusselemente vor gesehen sind. Über diese wird eine Verbindung zur nachgeschalteten elektrischen oder elektronischen Einrichtung, die der Signalübertragung oder auch der Stromver sorgung des Temperatursensors dient, ausgebildet. Daneben kann natürlich die geo metrische Ausgestaltung der beiden Gehäuse auch umgekehrt sein, das heißt, dass das Gehäuse der Rotorerfassungseinrichtung den U-förmigen Verbindungsabschnitt aufweist, in den der dann eher flächige Koppelabschnitt des Gehäuses der Tempera tursensoreinrichtung eingeschoben wird. According to the invention, for a simple but secure connection, the housing of the temperature detection device can have a coupling section with a U-shaped cross section, on which the contact elements for electrically connecting the temperature sensor to the connection elements, which are attached to a connection section of the housing of the rotor detection device to be received in the coupling section. are arranged, provided, or vice versa. This means that the housing of the temperature detection device preferably has an encompassing plug-in coupling section into which a corresponding, for example flat, connecting section of the housing of the rotor detection device is inserted, the corresponding contact and connection elements being seen in the overlap area. About this a connection to the downstream electrical or electronic device, which is used for signal transmission or the power supply of the temperature sensor, is formed. In addition, the geometric design of the two housings can of course also be reversed, i.e. the housing of the rotor detection device has the U-shaped connecting section into which the then rather flat coupling section of the housing of the temperature sensor device is inserted.
Wie beschrieben ist es natürlich erforderlich, den Temperatursensor mit der nachge schalteten elektrischen oder elektronischen Einrichtung zur Signalübertragung oder Stromversorgung etc. zu koppeln. Dies kann bei nicht lösbaren Gehäusen seitens der beiden Einrichtungen beispielsweise durch entsprechende Kabel, die vom Tempera tursensor zu einem Anschlussstecker am Gehäuse der Bauteilgruppe führen, realisiert werden. Aufgrund der Beweglichkeit des Sensorabschnitts würden diese Kabel jedoch im Rahmen der Montage bewegt, wenn der Sensorabschnitt aus- oder einfedert, um seine endgültige Montageposition einzunehmen, was sich mitunter nachteilig auf die Kontaktverbindung auswirken kann, es kann zu einem Verklemmen des Kabels kom men oder Ähnliches. Im Falle lösbarer Gehäuse ist eine Kabelverbindung ohnehin un zweckmäßig, da ansonsten entsprechende zusätzliche Kabelverbindungen zwischen den beiden Gehäusen geschlossen werden müssten. Um hier Abhilfe zu schaffen, sieht eine besonders zweckmäßige Weiterbildung der Erfindung vor, dass der Tempe ratursensor über das oder die elektrisch leitfähigen Federelemente elektrisch mit einer nachgeschalteten elektrischen oder elektronischen Einrichtung gekoppelt ist. Wie be schrieben ist das oder sind die Federelemente für das Anfedern und damit die Bewe gung des Sensorabschnitts verantwortlich. Erfindungsgemäß wird nun das oder wer den die Federelemente in die elektrische Leitungsverbindung integriert, sind also Teil des Signal- oder Strom leitungspfads, indem sie den Temperatursensor mit der nach geschalteten elektrischen oder elektronischen Einrichtung elektrisch koppeln. Dies ist besonders zweckmäßig, als hierdurch jedwede separate Kabelverbindung entfallen kann, soweit der Übergang vom beweglichen Sensorabschnitt zu positionsfesten An schlüssen oder Leitungen innerhalb der Bauteilgruppe betroffen ist. As described, it is of course necessary to couple the temperature sensor with the downstream electrical or electronic device for signal transmission or power supply, etc. In the case of non-detachable housings, this can be implemented by the two devices, for example, by means of appropriate cables that lead from the temperature sensor to a connector on the housing of the component group. Due to the mobility of the sensor section, however, these cables would be moved during assembly when the sensor section extends or compresses to assume its final assembly position, which can sometimes have a detrimental effect on the contact connection, the cable can jam or something similar . In the case of detachable housings, a cable connection is not expedient anyway, since otherwise corresponding additional cable connections between the two housings would have to be closed. In order to remedy this, a particularly expedient development of the invention provides that the temperature sensor is electrically coupled to a downstream electrical or electronic device via the electrically conductive spring element or elements. As described, it is or the spring elements are responsible for the springing and thus the movement of the sensor section. According to the invention, the or who the spring elements are integrated into the electrical line connection, are therefore part of the signal or power line path by electrically coupling the temperature sensor with the electrical or electronic device connected downstream. This is particularly useful as it eliminates the need for any separate cable connection can, as far as the transition from the movable sensor section to fixed-position connections or lines within the component group is affected.
Für die elektrische Integration des oder der Federelemente ist es zweckmäßig, wenn der Temperatursensor an einen oder zwei sensorseitigen Kontaktschuhe angeschlos sen ist, an dem oder denen das oder die Federelemente elektrisch kontaktiert sind. Da der Temperatursensor üblicherweise eine zweiadrige Leitung aufweist, sind bevorzugt zwei sensorseitige Kontaktschuhe vorgesehen, wobei in diesem Fall dann auch zwei separate Federelemente, je eines für den entsprechenden Leitungspfad, vorgesehen sind, die dann jeweils mit einem entsprechenden Anschlusselement am anderen En de gekoppelt sind. For the electrical integration of the spring element or elements, it is useful if the temperature sensor is connected to one or two sensor-side contact shoes on which the spring element or elements are electrically contacted. Since the temperature sensor usually has a two-wire line, two sensor-side contact shoes are preferably provided, in which case two separate spring elements, one each for the corresponding line path, are provided, which are then each coupled to a corresponding connection element at the other end.
Für diese Kopplung am anderen Ende ist es zweckmäßig, wenn das oder die Fe derelemente mit dem anderen Ende an einem oder jeweils einem weiteren, mit den Anschlusselementen am Gehäuse der Rotorlagenerfassungseinrichtung koppelbaren Kontaktschuh elektrisch kontaktiert sind. Auch an diesem Ende ist demzufolge ein o- der sind bevorzugt zwei entsprechende Kontaktschuhe vorgesehen, so dass sich auch dort definierte Anschlussbedingungen für das respektive die Federelemente er geben, wobei der oder die Kontaktschuhe unmittelbar mit entsprechenden Anschlus selementen am Gehäuse der Rotorlagenerfassungseinrichtung gekoppelt werden, und zwar unabhängig davon, ob nun ein gemeinsames Baugruppengehäuse vorgesehen ist, oder separate, lösbare Gehäuse. For this coupling at the other end, it is expedient if the spring element or elements are electrically contacted at the other end on one or another contact shoe that can be coupled to the connection elements on the housing of the rotor position detection device. Accordingly, one or two corresponding contact shoes are also provided at this end, so that there are defined connection conditions for the respective spring elements, with the contact shoe or shoes being coupled directly to corresponding connection elements on the housing of the rotor position detection device, and regardless of whether a common assembly housing is provided or separate, detachable housing.
Das oder jedes Federelement selbst ist bevorzugt als Schraubenfeder ausgeführt, die ohne weiteres auch als elektrisch leitendes Element ausgelegt werden kann. Denkbar ist aber auch die Ausgestaltung des oder jedes Federelements als Elastomerbauteil, insbesondere ein Silikon, wobei dann für den Fall, dass über dieses Elastomerbauteil auch die elektrische Kopplung erfolgen soll, dem Elastomerbauteil eine entsprechen de Leitfähigkeit zu verleihen ist. The or each spring element itself is preferably designed as a helical spring, which can easily be designed as an electrically conductive element. However, it is also conceivable to design the or each spring element as an elastomer component, in particular a silicone, in which case the elastomer component is to be given a corresponding conductivity in the event that the electrical coupling is also to take place via this elastomer component.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Bezugnah me auf die Zeichnungen erläutert. Die Zeichnungen sind schematische Darstellungen und zeigen: Figur 1 eine Teilansicht einer erfindungsgemäßen elektrischen Maschine mit endseitigem Gehäusedeckel und Statorwicklung sowie noch nicht mon tierter Baugruppe, The invention is explained below using exemplary embodiments with reference to the drawings. The drawings are schematic representations and show: Figure 1 is a partial view of an electrical machine according to the invention with the end housing cover and stator winding and not yet mounted assembly,
Figur 2 die Anordnung aus Figur 1 mit am Deckel, zur Wicklung innenliegend, montierter Baugruppe, FIG. 2 shows the arrangement from FIG. 1 with the assembly mounted on the cover, inside for winding,
Figur 3 eine vergrößerte Teilansicht aus Figur 2 im Bereich des Kontakts des den Temperatursensor aufweisenden Sensorabschnitts der Tempera turerfassungseinrichtung an der Wicklung, FIG. 3 shows an enlarged partial view from FIG. 2 in the area of the contact of the sensor section of the temperature detection device having the temperature sensor on the winding,
Figur 4 eine Perspektivansicht der Temperaturerfassungseinrichtung mit voll ständig ausgefahrenem Sensorabschnitt, FIG. 4 is a perspective view of the temperature detection device with the sensor section fully extended,
Figur 5 die Temperaturerfassungseinrichtung aus Figur 4 mit teilweise eingefah renem Sensorabschnitt, FIG. 5 shows the temperature detection device from FIG. 4 with a partially retracted sensor section,
Figur 6 die Temperaturerfassungseinrichtung mit vollständig eingefahrenem Sensorabschnitt, FIG. 6 shows the temperature detection device with the sensor section fully retracted,
Figur 7 eine teilgeschnittene Perspektivansicht der Temperaturerfassungsein richtung aus Figur 5, und FIG. 7 is a partially sectioned perspective view of the temperature detection device from FIG. 5, and FIG
Figur 8 eine Perspektivansicht der Rotorerfassungseinrichtung. Figure 8 is a perspective view of the rotor detection device.
Figur 1 zeigt eine Teilansicht einer erfindungsgemäßen elektrischen Maschine 1 , wie sie beispielsweise für den Antrieb eines Kraftfahrzeugs verwendet werden kann, in ei ner Explosionsdarstellung. Gezeigt ist der Teil eines Stators 2 mit einem Deckel 3 so wie einer Wicklung 4, deren Wicklungskopf 5 aus dem Deckel 3 hervorragt. Nicht nä her dargestellt, jedoch hinlänglich bekannt, umfasst die elektrische Maschine natürlich auch einen entsprechenden, innerhalb des Stators drehbaren Rotor, der mit entspre chenden Magneten belegt ist, und der über ein elektrisches Wanderfeld, das seitens der Wicklung 4 erzeugt wird, gedreht werden kann. Vorgesehen ist des Weiteren eine Baugruppe 6, die sowohl eine Temperaturerfas sungseinrichtung 7 als auch eine Rotorerfassungseinrichtung 8 umfasst. Die Tempe raturerfassungseinrichtung 7 dient zur Erfassung einer Temperatur des Stators, vor liegend einer Temperatur an der Wicklung 4. Die Rotorerfassungseinrichtung 8, die einen entsprechenden Rotorlagesensor aufweist, der ein am Rotor angeordnetes, mit diesem rotierendes Bauteil erfasst, dient der Erfassung der Drehzahl und/oder der Drehposition des Rotors relativ zum Stator 2. Die Funktionen der beiden separaten Einrichtungen sind ebenfalls hinlänglich bekannt. Figure 1 shows a partial view of an electrical machine 1 according to the invention, as it can be used, for example, for driving a motor vehicle, in an exploded view. The part of a stator 2 with a cover 3 and a winding 4, the winding head 5 of which protrudes from the cover 3, is shown. Not shown in more detail, but well known, the electric machine naturally also includes a corresponding rotor which can be rotated within the stator and which is occupied with corresponding magnets and which can be rotated via a traveling electric field generated by the winding 4 . Furthermore, an assembly 6 is provided, which comprises both a temperature detection device 7 and a rotor detection device 8. The temperature detection device 7 is used to detect a temperature of the stator, in front of a temperature on the winding 4. The rotor detection device 8, which has a corresponding rotor position sensor that detects a component arranged on the rotor and rotating with it, is used to detect the speed and / or the rotational position of the rotor relative to the stator 2. The functions of the two separate devices are also well known.
Beide Einrichtungen 7, 8 sind Teil einer gemeinsamen, also als einteiliges Bauteil zu montierenden Baugruppe 6, wenngleich die beiden Einrichtungen 7, 8 voneinander lösbar sind, das heißt, beide weisen separate Gehäuse auf, die, worauf nachfolgend noch eingegangen wird, lösbar aneinander befestigt werden können. Both devices 7, 8 are part of a common assembly 6, which is to be assembled as a one-piece component, although the two devices 7, 8 are detachable from each other, i.e. both have separate housings which, as will be discussed below, are detachably attached to each other can be.
Die Temperaturerfassungseinrichtung 7 umfasst, worauf nachfolgend noch eingegan gen wird, einen Temperatursensor, während die Rotorerfassungseinrichtung 8 einen Rotorzustandssensor umfasst. Beide liefern also entsprechende Sensorsignale res pektive sind auch mit Strom zu versorgen, wozu ein entsprechender Steckanschluss 9 an der Baugruppe 6 vorgesehen ist, an dem ein Anschlussstecker 10 anzustecken ist, von dem Verbindungsleitungen 11 zu einer nachgeschalteten elektrischen oder elekt ronischen Einrichtung, die der Signalverarbeitung oder der Ansteuerung oder der Stromversorgung dienen, laufen. The temperature detection device 7 comprises, as will be discussed below, a temperature sensor, while the rotor detection device 8 comprises a rotor state sensor. Both deliver corresponding sensor signals and are also to be supplied with power, for which purpose a corresponding plug connector 9 is provided on the assembly 6, to which a connector 10 is to be plugged in, from the connecting lines 11 to a downstream electrical or electronic device that handles the signal processing or serve for control or power supply, run.
Figur 2 zeigt die Anordnung aus Figur 1 , wobei hier die Baugruppe 6 am Deckel 3 des Stators 2 montiert ist. Die Baugruppe 6 ist in den Innenumfang der Wicklung 4 respek tive des Wickelkopfes 5 gesetzt und mit entsprechenden Verbindungsschrauben 12, die in entsprechende Gewindebohrungen im Deckel 3 eingeschraubt sind, positions fest am Deckel 3 fixiert. Flierüber ist zum einen die Rotorerfassungseinrichtung res pektive der Rotorzustandserfassungssensor entsprechend positioniert, um mit dem ro torseitigen Bauteil zusammen zu wirken. Bei dem Rotorzustandserfassungssensor handelt es sich um einen Rotorlagesensor, der beispielsweise nach Art eines Resol- vers, eines Wirbelstromsensors, eines GMR-Sensors (GMR = Giant Magnetore sistance) oder Ähnliches handeln kann. Auch der Temperatursensor der Temperaturerfassungseinrichtung 7 ist nach Montage der Baugruppe 6 korrekt positioniert und im gezeigten Beispiel in definierte Anlage am Innenumfang des Wicklungskopfes 5 gebracht, wie insbesondere Figur 3 zeigt. Zu diesem Zweck ist an der Temperatursensorerfassungseinrichtung 7 ein Sensorab schnitt 13 vorgesehen, der relativ zur Baugruppe 6 beweglich ist, im gezeigten Bei spiel ist er radial nach außen relativ zur Baugruppe 6 bewegbar. An diesem Sensor abschnitt 13 ist endseitig der Temperatursensor, üblicherweise ein PTC- oder NTC- Widerstandselement, angeordnet und dort bevorzugt eingespritzt oder eingepresst. Er kann mit einer entsprechenden Schutzschicht versehen sein, beispielsweise aus ei nem Elastomer wie einem Silikonelastomer oder ähnlichem In jedem Fall wird er in unmittelbaren Kontakt mit dem Wickelkopf 5 gebracht, indem der Sensorabschnitt 13, der, worauf nachfolgend noch eingegangen ist, über zwei Federelemente angefedert ist und radial nach außen gedrückt wird. Aufgrund dieser radialen Beweglichkeit ist es möglich, auch größere Abstände zum Wicklungskopf 5 zu überbrücken und gleichwohl den Temperatursensor in eine definierte Anlage zu bringen. FIG. 2 shows the arrangement from FIG. 1, the assembly 6 being mounted on the cover 3 of the stator 2 here. The assembly 6 is set in the inner circumference of the winding 4 respec tive of the winding head 5 and fixed in position on the cover 3 with corresponding connecting screws 12 which are screwed into corresponding threaded holes in the cover 3. On the one hand, the rotor detection device and the rotor condition detection sensor are positioned accordingly in order to interact with the component on the rotor side. The rotor state detection sensor is a rotor position sensor which can act, for example, in the manner of a resolver, an eddy current sensor, a GMR sensor (GMR = Giant Magnetore Resistance) or the like. The temperature sensor of the temperature detection device 7 is also correctly positioned after the assembly 6 has been installed and, in the example shown, is brought into defined contact with the inner circumference of the end winding 5, as FIG. 3 in particular shows. For this purpose, a Sensorab section 13 is provided on the temperature sensor detection device 7, which is movable relative to the assembly 6, in the case shown, it is movable radially outward relative to the assembly 6. The temperature sensor, usually a PTC or NTC resistance element, is arranged at the end of this sensor section 13 and is preferably injected or pressed in there. It can be provided with a corresponding protective layer, for example made of an elastomer such as a silicone elastomer or the like.In any case, it is brought into direct contact with the winding head 5 by springing the sensor section 13, which will be discussed below, via two spring elements and is pressed radially outwards. Because of this radial mobility, it is possible to bridge larger distances from the winding head 5 and at the same time bring the temperature sensor into a defined system.
Dies ist detailliert in den Figuren 4 - 6 dargestellt. Figur 4 zeigt die Temperaturerfas sungseinrichtung 7, die ein Gehäuse 14 aufweist, das hier einen zylindrischen Ab schnitt 15 aufweist, in und aus dem der ebenfalls zylindrische Sensorabschnitt 13 be wegbar ist. Am unteren, freien, vorlaufenden Ende des Sensorabschnitts 13 befindet sich der Temperatursensor 16. In Figur 4 ist der Sensorabschnitt 13 vollständig aus gefahren, ein Anschlagelement 17, das einen Längsschlitz 18 im zylindrischen Ge häuseabschnitt 15 durchgreift, ist gegen das untere Schlitzende bewegt. This is shown in detail in FIGS. 4-6. Figure 4 shows the temperature detection device 7, which has a housing 14, which here has a cylindrical section 15, in and out of which the likewise cylindrical sensor section 13 can be moved. The temperature sensor 16 is located at the lower, free, leading end of the sensor section 13. In FIG. 4, the sensor section 13 is fully extended, a stop element 17, which extends through a longitudinal slot 18 in the cylindrical housing section 15, is moved towards the lower end of the slot.
Figur 5 zeigt die Temperaturerfassungseinrichtung 7 mit teilweise in den Gehäuseab schnitt 15 eingefahrenem Sensorabschnitt 13, das Anschlagelement 17 befindet sich in einer Mittenstellung in dem Schlitz 18. FIG. 5 shows the temperature detection device 7 with the sensor section 13 partially retracted into the housing section 15; the stop element 17 is in a central position in the slot 18.
Schließlich zeigt Figur 6 die Temperaturerfassungseinrichtung 7 mit nahezu vollstän dig in den zylindrischen Gehäuseabschnitt 15 eingefahrenem Sensorabschnitt 13, das Anschlagelement 17 befindet sich im Anschlag am oberen Schlitzende. Das heißt, dass über das Anschlagelement 17 sowie den Schlitz 18 zwei definierte Endpositio nen gegeben sind, nämlich die maximale Ausfahr- und die maximale Einfahrstellung, zwischen denen der Sensorabschnitt 13 nebst dem Temperatursensor 16 bewegbar ist. Diese Verschiebelänge ermöglicht einen beachtlichen toleranzbedingten Abstand sausgleich zur Kontaktfläche am Wicklungskopf 5. Finally, FIG. 6 shows the temperature detection device 7 with the sensor section 13 retracted almost completely into the cylindrical housing section 15, the stop element 17 being in the stop at the upper end of the slot. This means that the stop element 17 and the slot 18 have two defined end positions, namely the maximum extended and maximum retracted positions, between which the sensor section 13 and the temperature sensor 16 can be moved is. This shift length enables a considerable tolerance-related distance s to compensate for the contact surface on the end winding 5.
Wie bereits vorstehend beschrieben, sind die Temperaturerfassungseinrichtung 7 und die Rotorerfassungseinrichtung 8 voneinander lösbar, wozu einerseits die Tempera turerfassungseinrichtung 7 ein Gehäuse 14 aufweist, wie auch die Rotorerfassungs einrichtung 8 ein entsprechendes Gehäuse 30 aufweist. Um beide Gehäuse 14, 30 auf einfache Weise miteinander zu verbinden, gleichzeitig aber auch, worauf nachfol gend noch eingegangen werden wird, eine elektrische Verbindung des Temperatur sensors 16 zu einer nachgeschalteten elektrischen oder elektronischen Einrichtung über den Steckanschluss 9 zu realisieren, weist die Temperaturerfassungseinrichtung 7 respektive das Gehäuse 14 einen im Querschnitt U-förmigen Koppelabschnitt 19 auf, der zwei Schenkel 20 aufweist, an deren Innenseiten zwei Kontaktelemente 21 (die in den Figuren 4 -6 sowie 7 zum Teil gestrichelt gezeigt sind) vorgesehen sind. As already described above, the temperature detection device 7 and the rotor detection device 8 are detachable from one another, for which purpose the temperature detection device 7 has a housing 14 and the rotor detection device 8 has a corresponding housing 30. In order to connect the two housings 14, 30 to one another in a simple manner, but at the same time, as will be discussed below, to realize an electrical connection of the temperature sensor 16 to a downstream electrical or electronic device via the plug-in connection 9, the temperature detection device 7 or the housing 14 has a coupling section 19 which is U-shaped in cross section and has two legs 20, on the inner sides of which two contact elements 21 (which are shown in FIGS. 4-6 and 7 in part by dashed lines) are provided.
Die Rotorerfassungseinrichtung 8 respektive deren Gehäuse 30 weist einen Verbin dungsabschnitt 22 auf, siehe Figur 8, der derart ausgelegt und bemessen ist, dass er zwischen die Schenkel 20, also in den U-förmigen Koppelabschnitt 19 eingeschoben werden kann. An dem Verbindungsabschnitt 22 sind zwei Anschlusselemente 23 beidseits vorgesehen, die beim Zusammenschieben der Gehäuse 14 und 30 automa tisch miteinander kontaktiert werden, so dass beide Gehäuse elektrisch miteinander verbunden sind. Da die beiden Kontaktelemente 21 gleichzeitig auch mit dem Tempe ratursensor 16 elektrisch verbunden sind, ist demzufolge eine elektrische Verbindung des Temperatursensors 16 zu den Anschlusselementen 23 gegeben, die ihrerseits wiederum mit entsprechenden Kontakten im Bereich der Steckverbindung 9 verbun den sind, so dass letztlich hierüber der Temperatursensor 16 mit der nachgeschalte ten elektrischen oder elektronischen Einrichtung gekoppelt ist. The rotor detection device 8 or its housing 30 has a connecting section 22, see FIG. 8, which is designed and dimensioned in such a way that it can be pushed between the legs 20, that is, into the U-shaped coupling section 19. On the connecting section 22, two connection elements 23 are provided on both sides, which are automatically contacted with one another when the housings 14 and 30 are pushed together, so that the two housings are electrically connected to one another. Since the two contact elements 21 are also electrically connected to the temperature sensor 16 at the same time, there is consequently an electrical connection between the temperature sensor 16 and the connection elements 23, which in turn are connected to corresponding contacts in the area of the plug connection 9, so that ultimately the Temperature sensor 16 is coupled to the downstream electrical or electronic device.
Figur 7 zeigt eine Schnittansicht durch die Temperaturerfassungseinrichtung 7, wobei hier der zylindrische Gehäuseabschnitt 15 wie auch der Sensorabschnitt 13 geschnit ten gezeigt sind. FIG. 7 shows a sectional view through the temperature detection device 7, the cylindrical housing section 15 as well as the sensor section 13 being shown cut here.
Am Sensorabschnitt 13 ist an dessen Spitze der Temperatursensor 16, beispielsweise ein NTC-Widerstandselement, mitunter auch NTC-Perle genannt, die z. B. in Silikon zu Schutzzwecken eingebettet ist, angeordnet. Der Temperatursensor 16 ist hier über zwei Verbindungsleitungen 24 mit zwei Kontaktschuhen 25 verbunden. Die Kontakt schuhe 25 sind am Sensorabschnitt 13 befestigt. At the tip of the sensor section 13, the temperature sensor 16, for example an NTC resistance element, sometimes also called an NTC bead, which z. B. in silicone is embedded for protection purposes, arranged. The temperature sensor 16 is here connected to two contact shoes 25 via two connecting lines 24. The contact shoes 25 are attached to the sensor section 13.
Zum Bewegen des Sensorabschnitts 13 relativ zum Gehäuse 14 sind zwei elektrisch leitende Federelemente 26 hier in Form von Schraubenfedern 27 vorgesehen, die mit ihrem unteren Ende an den Kontaktschuhen 25 anliegen, diese also anfedern. Die anderen Enden der Federelemente 26 sind an weiteren Kontaktschuhen 28 abge stützt, welche Kontaktschuhe 28 im Gehäuse 14 fixiert sind und mit den beiden Kon taktelementen 21 verbunden sind. To move the sensor section 13 relative to the housing 14, two electrically conductive spring elements 26 are provided here in the form of helical springs 27, the lower end of which bear against the contact shoes 25, that is to say spring them down. The other ends of the spring elements 26 are supported abge on further contact shoes 28, which contact shoes 28 are fixed in the housing 14 and with the two con tact elements 21 are connected.
Den beiden Federelementen 26 kommt eine Doppelfunktion zu. Zum einen federn sie den Sensorabschnitt 13 an, drücken ihn also kontinuierlich quasi aus dem Gehäuse 14 heraus. Der Sensorabschnitt 13 kann gegen die Rückstellkraft der Federelemente 26 in den Gehäuseabschnitt 15 eingedrückt werden. Flierüber wird einerseits die au tomatische Positionierung des Sensorabschnitts 13 und damit des Temperatursensors 16 zum in seiner Temperatur zu erfassenden Bauteil, hier also dem Wickelkopf 5 und ein definierter Anlagekontakt sichergestellt. Darüber hinaus dienen als zweite Funkti on die beiden Federelemente 26 auch als elektrisch leitende Übertragungselemente, nachdem sie die Kontaktschuhe 25 und 28 miteinander elektrisch verbinden. Die Fe derelemente 26 sind hierzu aus einem leitfähigen Material, üblicherweise Metall, so dass eine Signalübertragung von dem Temperatursensor zur nachgeschalteten elektrischen oder elektronischen Einrichtung und umgekehrt wie auch eine Stromver sorgung oder Ähnliches hierüber möglich ist. Irgendeine Kabelverbindung ist in die sem Bereich demzufolge nicht erforderlich. The two spring elements 26 have a double function. On the one hand, they spring on the sensor section 13, that is to say press it continuously out of the housing 14, as it were. The sensor section 13 can be pressed into the housing section 15 against the restoring force of the spring elements 26. On the one hand, the automatic positioning of the sensor section 13 and thus of the temperature sensor 16 with respect to the component to be detected in terms of its temperature, here the end winding 5 and a defined contact contact, is ensured on the one hand. In addition, the two spring elements 26 also serve as the second function as electrically conductive transmission elements after they electrically connect the contact shoes 25 and 28 to one another. For this purpose, the spring elements 26 are made of a conductive material, usually metal, so that signal transmission from the temperature sensor to the downstream electrical or electronic device and vice versa, as well as a power supply or the like, is possible via this. Any cable connection is therefore not required in this area.
Anstelle einer Schraubenfeder 27 als Federelement 26 ist es auch denkbar, ein elektrisch leitfähiges Elastomerelement, beispielsweise aus einem Silikonelastomer, zu verwenden, das die Aufgaben der Anfederung und elektrischen Leitungsverbin dung erfüllt. Instead of a helical spring 27 as the spring element 26, it is also conceivable to use an electrically conductive elastomer element, for example made of a silicone elastomer, which fulfills the tasks of resilience and electrical line connection.
Figur 7 zeigt schließlich noch eine der Montage des Gehäuses 14 am Gehäuse 30 dienende Nase 29, die also als Montagekodierung in eine entsprechende Führungsnut im Gehäuse 30 eingeführt wird, so dass hierüber eine positionsexakte Anordnung des Gehäuses 14 am Gehäuse 30 möglich ist. Finally, FIG. 7 shows a lug 29 which is used to assemble the housing 14 on the housing 30, that is to say as assembly coding in a corresponding guide groove is introduced into the housing 30, so that an exact position arrangement of the housing 14 on the housing 30 is possible.
Schließlich besteht noch die Möglichkeit, den Sensorabschnitt 13 mit einem Kupfer kern zu versehen, über den die Temperatur an den Temperatursensor geleitet werden kann, wobei auch ein anderes leitfähiges Material verwendet werden kann. Finally, there is also the possibility of providing the sensor section 13 with a copper core via which the temperature can be conducted to the temperature sensor, it also being possible to use a different conductive material.
Wie die vorstehende Figurenbeschreibung zeigt, weist die erfindungsgemäße elektri sche Maschine eine Reihe von Vorteilen gegenüber bekannten elektrischen Maschi nen auf. So ist ein geringerer Montageaufwand aufgrund der Verwendung nur einer Baugruppe enthaltend die beiden Erfassungseinrichtungen gegeben, es sind weniger Verschraubungen zu setzen. Insbesondere ist ein automatischer Montageprozess möglich. Aufgrund der geringeren Bauteileanzahl sind auch weniger Toleranzen aus zugleichen. Etwaige Toleranzen im Bereich der Positionierung des Temperatur sensors werden durch die integrierte Elastizität respektive Federung des Sensorab schnitts umfassend den Temperatursensor ausgeglichen. Auch ist nur ein Kabelkanal erforderlich, da eine gemeinsame Steckverbindung als Anschluss der beiden Erfas sungseinrichtungen zu einer nachgeschalteten elektrischen oder elektronischen Ein richtung über nur einen beispielsweise 8-poligen Stecker, gegeben ist. Schließlich sind, da nur eine Baugruppe positioniert wird, auch weniger Bearbeitungen an den re levanten Bauteilen, insbesondere dem Deckel, an dem die Baugruppe befestigt wird, vorzunehmen. Ein weiterer wichtiger Vorteil ist, dass auch keine separaten Leitungen zur Verbindung des Temperatursensors mit der nachgeschalteten elektronischen oder elektrischen Einrichtung vorzusehen sind. As the above description of the figures shows, the electrical machine according to the invention has a number of advantages over known electrical machines. This means that there is less assembly effort due to the use of only one assembly containing the two detection devices, and fewer screw connections have to be set. In particular, an automatic assembly process is possible. Due to the lower number of components, fewer tolerances have to be compensated. Any tolerances in the area of the positioning of the temperature sensor are compensated for by the integrated elasticity or suspension of the sensor section, including the temperature sensor. Only one cable duct is also required, since a common plug connection is provided to connect the two detection devices to a downstream electrical or electronic device via just one, for example, 8-pin connector. Finally, since only one assembly is positioned, fewer machining operations must be carried out on the relevant components, in particular the cover to which the assembly is attached. Another important advantage is that no separate lines have to be provided for connecting the temperature sensor to the downstream electronic or electrical device.
Bezuqszeichenliste Maschine Stator Deckel Wicklung Wicklungskopf Baugruppe Temperaturerfassungseinrichtung Rotorerfassungseinrichtung Steckanschluss Anschlussstecker Verbindungsleitung Verbindungsschraube Sensorabschnitt Gehäuse Abschnitt Temperatursensor Anschlagelement Längsschlitz Koppelabschnitt Schenkel Kontaktelement Verbindungsabschnitt Anschlusselement Verbindungsleitung Kontaktschuh Federelement Schraubenfeder Kontaktschuh Nase Gehäuse Bezuqszeichenliste machine stator cover winding winding head assembly temperature detection device rotor detection device plug connection connector connecting line connecting screw sensor section housing section temperature sensor stop element longitudinal slot coupling section leg contact element connecting section connecting element connecting line contact shoe spring element helical spring contact shoe nose housing

Claims

Patentansprüche Claims
1. Elektrische Maschine, mit einem Stator (2) und einem relativ zum Stator (2) drehbaren Rotor, einer Temperaturerfassungseinrichtung (7) zur Erfassung ei ner Temperatur des Stators (2) umfassend einen Temperatursensor (16) und einer Rotorerfassungseinrichtung (8) zur Erfassung einer Drehzahl und/oder Drehposition des Rotors umfassend einen Rotorzustandserfassungssensor, dadurch gekennzeichnet, dass die Temperaturerfassungseinrichtung (7) und die Rotorerfassungseinrichtung (8) zu einer gemeinsamen Baugruppe (6) ver bunden sind, wobei die Temperaturerfassungseinrichtung (7) einen über we nigstens ein Federelement (26) zwischen zwei Endpositionen bewegbaren, den Temperatursensor (16) umfassenden Sensorabschnitt (13) aufweist. 1. Electrical machine, with a stator (2) and a rotor rotatable relative to the stator (2), a temperature detection device (7) for detecting a temperature of the stator (2) comprising a temperature sensor (16) and a rotor detection device (8) for Detection of a speed and / or rotational position of the rotor comprising a rotor condition detection sensor, characterized in that the temperature detection device (7) and the rotor detection device (8) are connected to form a common assembly (6), the temperature detection device (7) having at least one Has spring element (26) movable between two end positions, the temperature sensor (16) comprising sensor section (13).
2. Elektrische Maschine nach Anspruch 1 , dadurch gekennzeichnet, dass zwei den Sensorabschnitt (13) anfedernde Federelemente (26) vorgesehen sind. 2. Electrical machine according to claim 1, characterized in that two spring elements (26) which spring-loaded the sensor section (13) are provided.
3. Elektrische Maschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Sensorabschnitt (13) radial relativ zu der Baugruppe (6) bewegbar ist. 3. Electrical machine according to claim 1 or 2, characterized in that the sensor section (13) can be moved radially relative to the assembly (6).
4. Elektrische Maschine nach einem der vorangehenden Ansprüche, dadurch ge kennzeichnet, dass die Temperaturerfassungseinrichtung (7) ein Gehäuse (14) aufweist, aus dem und in das der Sensorabschnitt (13) bewegbar ist. 4. Electrical machine according to one of the preceding claims, characterized in that the temperature detection device (7) has a housing (14) from which and into which the sensor section (13) can be moved.
5. Elektrische Maschine nach Anspruch 4, dadurch gekennzeichnet, dass das Gehäuse (14) lösbar an einem Gehäuse (30) der Rotorerfassungseinrichtung (8) angeordnet und mit einem oder mehreren gehäuseseitig vorgesehenen Kontaktelementen (21) an einem oder mehreren dort vorgesehenen, einer nachgeschalteten elektrischen oder elektronischen Einrichtung zugeordneten Anschlusselementen (23) elektrisch gekoppelt ist. 5. Electrical machine according to claim 4, characterized in that the housing (14) is detachably arranged on a housing (30) of the rotor detection device (8) and with one or more contact elements (21) provided on the housing side on one or more provided there, one downstream electrical or electronic device associated connection elements (23) is electrically coupled.
6. Elektrische Maschine nach Anspruch 5, dadurch gekennzeichnet, dass das Gehäuse (14) der Temperaturerfassungseinrichtung (7) einen im Querschnitt U-förmigen Koppelabschnitt (19) aufweist, an dem das oder die Kontaktele mente (21) zum elektrischen Verbinden des Temperatursensors (16) mit dem oder den Anschlusselementen (23), die an einem im Koppelabschnitt (19) auf zunehmenden Verbindungsabschnitt (22) des Gehäuses (30) der Rotorerfas sungseinrichtung (8) angeordnet sind, vorgesehen sind, oder umgekehrt. 6. Electrical machine according to claim 5, characterized in that the housing (14) of the temperature detection device (7) has a coupling section (19) with a U-shaped cross section, on which the one or more contact elements (21) for electrically connecting the temperature sensor ( 16) with the or the connection elements (23) which are arranged on a connecting section (22) of the housing (30) of the rotor detection device (8) which increases in the coupling section (19), or vice versa.
7. Elektrische Maschine nach einem der vorangehenden Ansprüche, dadurch ge kennzeichnet, dass der Temperatursensor (16) über das oder die elektrisch leit fähigen Federelemente (26) elektrisch mit einer nachgeschalteten elektrischen oder elektronischen Einrichtung gekoppelt ist. 7. Electrical machine according to one of the preceding claims, characterized in that the temperature sensor (16) is electrically coupled to a downstream electrical or electronic device via the one or more electrically conductive spring elements (26).
8. Elektrische Maschine nach Anspruch 7, dadurch gekennzeichnet, dass der Temperatursensor (16) an einen oder zwei sensorseitige Kontaktschuhe (25) angeschlossen ist, an dem oder denen das oder die Federelemente (26) elektrisch kontaktiert sind. 8. Electrical machine according to claim 7, characterized in that the temperature sensor (16) is connected to one or two sensor-side contact shoes (25) on which the spring element or elements (26) are electrically contacted.
9. Elektrische Maschine nach Anspruch 8 und Anspruch 4, dadurch gekennzeich net, dass das oder die Federelemente (26) mit dem anderen Ende an einem oder jeweils einem weiteren, mit den Anschlusselementen (23) am Gehäuse (30) der Rotorlageerfassungseinrichtung (8) koppelbaren Kontaktschuh (28) elektrisch kontaktiert sind. 9. Electrical machine according to claim 8 and claim 4, characterized in that the spring element or elements (26) with the other end on one or each other with the connection elements (23) on the housing (30) of the rotor position detection device (8) connectable contact shoe (28) are electrically contacted.
10. Elektrische Maschine nach einem der vorangehenden Ansprüche, dadurch ge kennzeichnet, dass das oder jedes Federelement (26) als Schraubenfeder (27) oder als Elastomerbauteil, insbesondere ein Silikon, ausgeführt ist. 10. Electrical machine according to one of the preceding claims, characterized in that the or each spring element (26) is designed as a helical spring (27) or as an elastomer component, in particular a silicone.
EP20750588.4A 2019-09-09 2020-07-22 Electrical machine Withdrawn EP4029127A1 (en)

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ES2409029T3 (en) * 2009-10-01 2013-06-24 Ebm-Papst Mulfingen Gmbh & Co. Kg Stator arrangement for an electric motor.
DE202013007490U1 (en) * 2013-08-23 2013-11-19 Elth S.A. Temperature sensor for a fluid
JP5726277B1 (en) * 2013-11-29 2015-05-27 三菱電機株式会社 Rotating electric machine, rotating electric machine stator, and method of manufacturing rotating electric machine stator
DE102014225978A1 (en) * 2014-12-16 2016-06-16 Volkswagen Aktiengesellschaft Temperature sensor unit for an electric motor, in particular for the electric motor of a motor vehicle
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FR3049128B1 (en) * 2016-03-21 2020-02-28 Valeo Equipements Electriques Moteur BRUSH HOLDER FOR ROTATING ELECTRIC MACHINE PROVIDED WITH AN INTEGRATED TEMPERATURE SENSOR HOLDER
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DE102018128178A1 (en) * 2018-11-12 2020-05-14 Schaeffler Technologies AG & Co. KG Electrical machine with integrated temperature sensor and rotor condition detection sensor
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