EP3881416A1 - Machine électrique à capteur de température intégré et capteur d'état de rotor - Google Patents

Machine électrique à capteur de température intégré et capteur d'état de rotor

Info

Publication number
EP3881416A1
EP3881416A1 EP19804625.2A EP19804625A EP3881416A1 EP 3881416 A1 EP3881416 A1 EP 3881416A1 EP 19804625 A EP19804625 A EP 19804625A EP 3881416 A1 EP3881416 A1 EP 3881416A1
Authority
EP
European Patent Office
Prior art keywords
electrical machine
sensor
temperature sensor
stator
rotor
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.)
Pending
Application number
EP19804625.2A
Other languages
German (de)
English (en)
Inventor
Andreas Ruppert
Michael Marsetz
Thomas Fritz
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 EP3881416A1 publication Critical patent/EP3881416A1/fr
Pending 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
    • 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 for driving a motor vehicle, such as a car, truck, bus or other commercial vehicle, in particular for a drive train or for a wheel hub drive of a hybrid vehicle or egg Nes electric vehicle, with a stator, a rotatable relative to the stator rotor , a arranged to detect a temperature of the stator and trained temperature sensor and a arranged to detect a speed and / or rotational position of the rotor arranged and designed stator-fixed rotor condition detection sensor.
  • a motor vehicle such as a car, truck, bus or other commercial vehicle, in particular for a drive train or for a wheel hub drive of a hybrid vehicle or egg Nes electric vehicle
  • a stator a rotatable relative to the stator rotor
  • a arranged to detect a temperature of the stator and trained temperature sensor and a arranged to detect a speed and / or rotational position of the rotor arranged and designed stator-fixed rotor condition detection sensor.
  • DE 10 2017 1 16 232 A1 discloses a hybrid module for a drive train of a motor vehicle with a rotor position sensor and a temperature sensor.
  • the temperature sensor and the rotor state detection sensor are implemented as subsystems of a common sensor system, a first subsystem having the temperature sensor having an elastic, thermally conductive contact element connected to the temperature sensor, which contact element is fixed to a contact area of the stator brought.
  • the assembly effort is significantly reduced.
  • the temperature sensor is attached in a particularly stable manner to compensate for tolerances, so that particularly reliable temperature detection during operation is ensured.
  • the following advantages also result: fewer screw connections and less daily effort; fewer tolerances due to reduced number of components; automated assembly processes; Contacting of the temperature sensor on a measuring surface is ensured by a compensating element (contact element); less machining of the existing castings; only one cable duct; just a plug.
  • the contact element bears on a radial outer side, a radial inner side, a circumferential side or an axial side of a coil winding of the stator or at least partially within the coil winding, ie preferably between two adjacent wires of the coil winding development / is inserted.
  • the temperature sensor is provided for the most precise possible temperature detection on the stator. This advantage is further increased if the contact element is pressed directly onto a wire of the coil winding.
  • the contact element is pressed onto the wire in such a way that the wire at least partially elastically deforms the contact element.
  • the contact element nestles against the wire and surrounds it from several sides.
  • the result is heat transfer to the contact element that is as loss-free as possible.
  • the first subsystem via a snap connection, i. H. with at least one or more snap lugs / hooks, indirectly or directly connected to a second subsystem having the rotor state detection sensor. This significantly simplifies assembly.
  • the first subsystem is connected to a housing region of the sensor system which forms a cable channel (via this snap connection).
  • the second subsystem is also attached / integrated to the housing area.
  • a power supply is implemented in a particularly space-saving manner if a main line guided in the cable duct is further connected to the temperature sensor and the rotor state detection sensor.
  • the first subsystem and / or the second subsystem are / is preferably electrically connected to a line connection of the sensor system. This results in a central line connection in the form of a plug; the structure is thus further simplified.
  • the invention relates to a hybrid module for a motor vehicle drive train, with an electrical machine according to the invention according to at least one of the Designs previously described and at least one clutch operatively connected to the rotor.
  • a hybrid module is understood here to mean a special type of electric machine or a special electrical system.
  • an integration of a temperature sensor including tolerance compensation takes place in connection with a rotor position sensor system.
  • the rotor position sensor (rotor state sensor) and the temperature sensor are integrated in a common superordinate sensor system, which sensor system in turn has a subsystem having the rotor position sensor and a subsystem having the temperature sensor, which subsystems function independently of one another and are flexibly connected to one another.
  • the temperature sensor subsystem has a flexible or elastic element in order to provide a clean thermal conductive connection of the temperature sensor subsystem with the stator of the electrical machine.
  • Fig. 1 is a detailed perspective view of an inventive, in one
  • Hybrid module used electrical machine, where a location of a temperature sensor of a sensor system can be clearly seen,
  • FIG. 2 is a perspective view of the sensor system cut in the area of the temperature sensor
  • FIG. 3 shows a front view of the sensor system in the area of the temperature sensor
  • Fig. 4 is a perspective view of the in Figs. 1 to 3 sensor systems used from the bottom
  • 5 is a perspective view of the sensor system of FIG. 4 from an upper side
  • FIG. 6 is a perspective view of a temperature sensor
  • FIG. 7 is a sectional view of the subsystem of FIG. 7, so that a Mixele element can be seen,
  • FIGS. 6 and 7 are perspective views of the subsystem according to FIGS. 6 and 7 in a state removed from a housing area of the sensor system
  • FIG. 9 is a perspective view of the first subsystem with the housing area rich in the assembled state
  • Fig. 10 is a perspective view of the sectioned subsystem according to
  • Fig. 1 1 is a perspective view of an alternatively designed subsystem with a copper insert.
  • An electrical machine 1 according to the invention is preferably part of a flybrid module 20 in its operation, which can be seen in part in FIG. 1.
  • the electrical machine 1 is therefore preferably part of a motor vehicle drive train, such as a drive train or a flybrid vehicle pure electric vehicle.
  • the electrical machine 1 is thus used as a drive machine in the drive train.
  • the hybrid module 20 typically has one of the couplings, not shown for the sake of clarity, which are set on the input or output side of a rotor 3.
  • the electrical machine 1 can also be integrated directly into a wheel drive.
  • a housing 24 of the electrical machine 1 is shown schematically.
  • a stator 2 is fixedly connected to the housing 24.
  • the stator 2 can be seen in particular with its coil winding 14, which is firmly accommodated in the housing 24.
  • a rotor 3 (rotor shaft) of the electrical machine 1 is mounted in the housing 24 such that it can rotate relative to the stator 2 about an axis of rotation.
  • a sensor system 8 according to the invention is attached to the housing / stator.
  • the sensor system 8 according to the invention has both a temperature sensor 4 (NTC or PTC) and a rotor condition detection sensor 5 in the form of a rotor position sensor.
  • NTC temperature sensor
  • PTC rotor condition detection sensor
  • the temperature sensor 4 and the rotor state sensor 5 are each integrated in a separate subsystem 6, 7 of the sensor system 8.
  • the two subsystems 6, 7 and thus the temperature sensor 4 and the ro torstatus-detection sensor 5 are interconnected.
  • the two subsystems 6, 7 are flexibly coupled / connected to one another. In this version, this is in connection with FIGS. 6 to 10 recognizable first subsystem 6 via a snap connection 16, ie positively, attached to a housing area 18 of the sensor system 8.
  • the first subsystem 6 has a contact element 9 which, according to the invention, bears directly / directly on a wire 15 of the coil winding 14. The basic position of the first subsystem 6 / of the contact element 9 can be seen in FIG. 1.
  • the contact element 9 is positioned on an axial side 13 of the coil winding 14, the contact element 9 in principle also in other areas, for example a radial outer side 11 or a radial inner side 12 or between a plurality of wires 15 of the coil winding 14 according to further versions can be arranged.
  • the contact between the contact element 9 and the coil winding 14 takes place at a contact area 10 of the coil winding 14, which contact area 10 is implemented here on a wire 15 of the coil winding 14.
  • the contact element 9 is thus ge according to FIGS. 2 and 3 flat on the stator 2 / the coil winding 14.
  • the heat-conducting contact element 9 conducts the heat generated in the stator 2 partially to the temperature sensor 4 as it is embedded in the first subsystem 6, in order to thus detect the temperature of the stator 2.
  • the contact element 9 can for example be in the form of a silicone pad, an elastomer or in the form of a Druckfe.
  • the temperature sensor 4 is then further typically electrically connected to a main line 19 of the sensor system 8 by means of a first line 22, which is shown here partially schematically.
  • the first subsystem 6 also has a recording element 29 in which the temperature sensor 4 and the contact element 9 are introduced.
  • the first subsystem 6 is, as in cooperation with FIGS. 8 and 9, attached to the housing area 18 via a snap connection 16.
  • the receiving element 29 has two snap hooks 26 / snap noses which are elastically deformable. These snap hooks 26 clasp the housing area 18 and are engaged in corresponding recesses 28 of the housing area 18 Ge.
  • the receiving element 29 Hal tenasen 30, which are inserted into opposite receptacles 31 of the housing area 18.
  • the rotor state detection sensor 5 is typically positioned and designed to detect a rotational speed and a rotational position of the rotor 3 of the electrical machine 1.
  • the rotor condition detection sensor 5 is part of a second subsystem 7 of the sensor system 8.
  • the rotor state detection sensor 5 is connected to the line connection 21 via a second line 23.
  • the second line 23 is preferably implemented as a 6-pin (alternatively also 4-pin) line.
  • the two lines 22 and 23 are finally summarized in a main line 19 (6-pin or 8-pin cable), the main line in turn being guided in the housing area 18, forming a cable channel 17.
  • the main line is finally connected to the line connection 21, which line connection 21 forms a plug.
  • a signal transmission / power supply takes place in operation in a typical manner via the line connection 21 to power electronics, which are not shown here for the sake of clarity.
  • the rotor state detection sensor 5 is thus firmly attached to the stator 2.
  • the rotor state detection sensor 5 cooperates with a rotatably coupled to the rotor 3 th encoder 25.
  • the encoder 25 is preferably implemented as a corresponding encoder wheel and generates a signal corresponding to the rotational position on the rotor state detection sensor 5.
  • the rotor state detection sensor 5 is primarily designed to determine the rotational position, i. H. to grasp the angular position of the rotor 3.
  • the rotor state detection sensor 5 is simultaneously designed to detect a speed of the rotor 3.
  • the second subsystem 7 is also attached to the housing region 18 in this embodiment.
  • the two subsystems 6, 7 are firmly connected to one another and integrated in a common module. Al ternatively, the first subsystem 6 is directly connected to the second subsystem 7 / attached thereto.
  • the inventive solution for an electrical machine 1 is to integrate two sensor systems 6, 7 in an overall sensor system 8, which further comprises an RPS subsystem 7 and an NTC subsystem 6 exists, which continue to work independently of each other.
  • the advantage essentially consists in the integration of the overall system 8, since it is now possible to integrate the overall sensor system 8 in one, and no longer both, independently and one after the other.
  • this system 8 offers an advantage over the prior art: because the entire assembly is joined blind the correct position must be ensured from the outset and the installation tolerances must also be compensated for.
  • the NTC 6 has a flexible element (contact element 9). This flexible element 9 adapts to the contour of the electric machine 1 and ensures guaranteed contact between the NTC 6 and the winding 14 of the electric machine 1. All tolerances can thus be compensated.
  • the temperature sensor 4 (for example an NTC or PTC) is combined with an RPS sensor 5. Either the temperature sensor 4 can be permanently or flexibly integrated into the RPS sensor 5. In any case, a contact surface must be established between the temperature sensor 4 and the winding 14 of the electric machine 1 in order to record the temperature. This is difficult to achieve with a fixed connection, since axial, radial and / or tangential tolerances have to be compensated for.
  • the contact surface produced, ideally in the area of the windings 14, can be produced at any point on the electric machine 1 (stator 2), for example radially, tangentially or axially.
  • the contact surface of the temperature sensor 4 can be located radially below the electric machine winding 14, radially above, inside the windings 14 and axially outside of the windings 14.
  • the contact surface of the temperature sensor 4 can act actively or passively on the measuring surface to be detected.
  • the temperature sensor 4 has to rest against the winding 14 at a defined and firmly seated position.
  • the rotor position sensor 5 can be, for example, the functional principle of a resolver, eddy current sensor, GMR, etc. Novel sensors are also conceivable.
  • RPS stands for "rotor position sensor” and is referred to in the German translation as RLS / rotor position sensor. This integration also allows the number of components to be reduced, since, for example, a cable duct 17 or a common plug 21 can be used.
  • the temperature sensor 4 is usually 2-pole, ie it has two Signal lines.
  • the RPS sensor 5 is usually 4 or 6 poles.
  • the two signal lines of the temperature sensor 4 are preferably routed through the RPS sensor 5 to the power electronics. In the RPS sensor 5, this is done by a correspondingly expanded circuit board / PCB. Outside the sensor 5 by appropriate cables.
  • the NTC 6 is connected via a plug connection / clip connection 16 to the RPS 5, 7 or to the RPS cable duct (housing area 18). A sufficient fuse is thus made.
  • the entire cable (main line 19) can be prefabricated.
  • the RPS 5 with its 6 cores and the NTC 4 with its 2 cores or poles are attached to the cable 19.
  • the flexible element 9 can be designed, for example, in the form of a silicone pad, an elastomer or in the form of a compression spring.
  • the flexible element 9 may contain a copper core 27. Thus, the temperature can be glided more directly and better to the pearl. Another conductive material can also be used.

Landscapes

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

Abstract

L'invention concerne une machine électrique (1) pour un dispositif d'entraînement d'un véhicule à moteur, comprenant un stator (2), un rotor (3) rotatif par rapport au stator (2), un capteur de température (4) disposé et conçu pour détecter la température du stator (2) et un capteur d'état de rotor (5) logé de manière fixe sur le stator, disposé et conçu pour détecter une vitesse de rotation et/ou une position de rotation du rotor (3), le capteur de température (4) et le capteur d'état de rotor (5) étant conçus en tant que systèmes partiels (6, 7) d'un système de capteur commun (8). Un premier système partiel (6) présentant le capteur de température (4) comporte un élément de contact (9) thermoconducteur, élastique, raccordé au capteur de température (4), ledit élément de contact étant fixé à demeure sur une zone de contact (10) du stator (2). L'invention concerne en outre un module hybride (20) équipé de cette machine électrique (1).
EP19804625.2A 2018-11-12 2019-11-04 Machine électrique à capteur de température intégré et capteur d'état de rotor Pending EP3881416A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018128178.1A DE102018128178A1 (de) 2018-11-12 2018-11-12 Elektrische Maschine mit integriertem Temperatursensor und Rotorzustandserfassungssensor
PCT/DE2019/100942 WO2020098871A1 (fr) 2018-11-12 2019-11-04 Machine électrique à capteur de température intégré et capteur d'état de rotor

Publications (1)

Publication Number Publication Date
EP3881416A1 true EP3881416A1 (fr) 2021-09-22

Family

ID=68581120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19804625.2A Pending EP3881416A1 (fr) 2018-11-12 2019-11-04 Machine électrique à capteur de température intégré et capteur d'état de rotor

Country Status (5)

Country Link
US (1) US11670992B2 (fr)
EP (1) EP3881416A1 (fr)
CN (1) CN112997388B (fr)
DE (1) DE102018128178A1 (fr)
WO (1) WO2020098871A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019124088A1 (de) * 2019-09-09 2021-03-11 Schaeffler Technologies AG & Co. KG Elektrische Maschine
DE102021131877A1 (de) * 2021-12-03 2023-06-07 Schaeffler Technologies AG & Co. KG Niedervolt-Verbindungsvorrichtung für einen elektrischen oder hybriden Fahrzeugantrieb sowie elektrischer oder hybrider Fahrzeugantrieb
DE102023100434A1 (de) 2023-01-10 2024-07-11 Seg Automotive Germany Gmbh Sensorhalterung, elektrische Maschineneinheit und Verwendung einer Sensorhalterung

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Publication number Priority date Publication date Assignee Title
DE19505543C2 (de) * 1995-02-18 2002-04-18 Wilo Gmbh Kreiselpumpe mit Drehzahlsensor
EP1322026A1 (fr) * 2001-12-22 2003-06-25 Grundfos a/s Stator d'un moteur électrique
JP2004140976A (ja) * 2002-10-21 2004-05-13 Nissei Corp ブラシレスモータ
JP2011259549A (ja) * 2010-06-07 2011-12-22 Toyota Motor Corp 温度検出器
DE102010030968B4 (de) * 2010-07-06 2012-02-02 Zf Friedrichshafen Ag Temperatursensor und Anordnung zur Erfassung einer Temperatur einer elektrischen Maschine mit einem Temperatursensor
DE102012211675A1 (de) * 2012-07-05 2014-01-09 Zf Friedrichshafen Ag Kupplungsanordnung für ein Getriebe, sowie Verfahren zum Steuern einer Trennkupplung
DE102013201835A1 (de) * 2013-02-05 2014-08-21 Zf Friedrichshafen Ag Anordnung zur Temperaturerfassung einer Statorwicklung einer elektrischen Maschine
DE102013214385A1 (de) * 2013-07-23 2015-01-29 Zf Friedrichshafen Ag Elektrische Maschine
DE102013017975A1 (de) * 2013-11-29 2015-06-03 Fte Automotive Gmbh Elektromotorisch angetriebene Flüssigkeitspumpe, insbesondere zur Zwangsschmierung eines Schaltgetriebes für Kraftfahrzeuge
FR3018014B1 (fr) * 2014-02-24 2016-03-25 Lohr Electromecanique Machine synchrone equipee d'un capteur de position angulaire
JP6259715B2 (ja) * 2014-05-30 2018-01-10 Ｋｙｂ株式会社 回転電機
DE102014225978A1 (de) * 2014-12-16 2016-06-16 Volkswagen Aktiengesellschaft Temperatursensor-Einheit für einen Elektromotor, insbesondere für den Elektromotor einesKraftfahrzeugs
CN204376641U (zh) * 2015-01-08 2015-06-03 上海宏昊企业发展有限公司 一种转速反馈调节型水冷变频电机
DE102017116232A1 (de) 2017-01-13 2018-07-19 Schaeffler Technologies AG & Co. KG Hybridmodul für ein Kraftfahrzeug sowie Antriebsstrang mit Hybridmodul

Also Published As

Publication number Publication date
CN112997388A (zh) 2021-06-18
WO2020098871A1 (fr) 2020-05-22
US11670992B2 (en) 2023-06-06
US20220006364A1 (en) 2022-01-06
DE102018128178A1 (de) 2020-05-14
CN112997388B (zh) 2024-08-30

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