WO2020089010A1 - Couvercle de carter conçu pour un moteur électrique, moteur électrique et procédé de montage - Google Patents

Couvercle de carter conçu pour un moteur électrique, moteur électrique et procédé de montage Download PDF

Info

Publication number
WO2020089010A1
WO2020089010A1 PCT/EP2019/078870 EP2019078870W WO2020089010A1 WO 2020089010 A1 WO2020089010 A1 WO 2020089010A1 EP 2019078870 W EP2019078870 W EP 2019078870W WO 2020089010 A1 WO2020089010 A1 WO 2020089010A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing cover
stator
rotor
housing
axial
Prior art date
Application number
PCT/EP2019/078870
Other languages
German (de)
English (en)
Inventor
Ralph Guehrer
Manfred Zimmer
Sebastian Baumgart
Christian Brückner
Original Assignee
Zf Friedrichshafen Ag
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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2020089010A1 publication Critical patent/WO2020089010A1/fr

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
    • H02K11/21—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
    • H02K5/225—Terminal boxes or connection arrangements

Definitions

  • Housing cover for an electrical machine, electrical machine
  • the present invention relates to a housing cover for an electrical machine and an electrical machine with a housing cover.
  • the invention further relates to a method for mounting a stator of a rotor position sensor on a rotor of the rotor position sensor.
  • a rotor position sensor serves as an electromagnetic transmitter for converting an angular position of a rotor into an electrical variable.
  • stator windings of the rotor position sensor are arranged in a cylindrical housing of a rotor position sensor.
  • An angular position of the rotor, which is accommodated in the housing, can be determined by evaluating voltage signals on the stator windings.
  • a motor with a rotor and a rotor control is known from JP 2009 126 189 (A).
  • the rotor is covered by a cover that is screwed to the housing.
  • a drive system with an electrical machine and a transmission wherein a transmitter of the electrical machine is arranged on a drive side of the electrical machine.
  • the encoder has an encoder stator and an encoder rotor, which are concealed in a gear housing.
  • the object of the present invention is therefore to provide a concept for the simple mounting of a stator of a rotor position sensor on a rotor of a rotor position sensor, by means of which an off-center arrangement of the stator with respect to the rotor of the rotor position sensor can be prevented.
  • a housing cover for an electrical machine in particular for an electrical machine of a motor vehicle, is provided.
  • the housing cover comprises a stator laminated core of a stator of a rotor position sensor with stator windings molded into the housing cover.
  • the stator laminated core protrudes on one side of the housing cover, which in an assembled state shows the electrical machine, axi al from the housing cover or a housing part of the housing cover and forms an axial protrusion of the housing cover.
  • the stator laminated core is firmly accommodated in the non-protruding area in the housing part of the housing cover or is integrated into this.
  • the stator laminated core can, for example, also be accommodated in a housing which encloses the stator laminated core and stator windings, and with these form the axial projection.
  • the axial protrusion is adapted to an axial recess formed around a rotor of the electrical machine on a housing end face of the electrical machine, so that when the axial protrusion of the housing cover is received in the axial recess of the electrical machine, the stator is self-centered around the rotor .
  • a centering of the stator around the rotor can in other words be described by a coaxial arrangement of the stator and the rotor or by collinearly arranged axes of symmetry or rotation of the stator and the rotor.
  • the housing cover and in particular the geometric shape of the axial protrusion can, for example, be designed differently for use on different machines.
  • the axial recess of the machine Housing of the electrical machine to be adapted to the axial projection of the housing cover.
  • the axial protrusion of the housing cover is e.g. form-fittingly adapted to the axial recess on a housing outside of the electrical machine, so that when the axial protrusion of the housing cover is received in the axial recess from the electrical machine, the stator is self-centered around the rotor.
  • the axial protrusion can have a single outer radius over its entire axial extent, or in axial sections with different, e.g. radii that decrease towards the outside. At an outer end region of the axial recess, this can be at least slightly rounded in order to simplify assembly.
  • the stator has one or more, e.g. three stator windings, each of which can comprise two contact connections. Furthermore, the stator has a corresponding cylindrical cavity for receiving the rotor. A housing part of the housing cover, which e.g. Plastic, is formed radially outside of the stator core around it. To form the axial protrusion, these are
  • Stator laminated core and the housing part are arranged axially offset.
  • the housing cover according to the invention has the advantage of a simplified mounting of the stator of the rotor position sensor around the rotor, whereby a centered arrangement can be ensured.
  • the axial projection of the housing cover causes the stator to self-center around the rotor, so that axis displacements between the stator and rotor or an asymmetrical arrangement of the stator around the rotor can be avoided.
  • the integration of the stator in the housing cover also enables a light assembly of the stator and a cover of the rotor, so that in contrast to a separate assembly of the two elements, an assembly step can be omitted.
  • the axial protrusion at least in some areas comprises a circular cross section.
  • the axial protrusion can be made completely hollow cylindrical, its inner diameter being larger than that Diameter of the rotor to be accommodated.
  • An outer diameter of the circular cross-section of the axial projection is adapted to an outer diameter, for example a minimum outer diameter of the axial recess.
  • the axial protrusion does not have to be in contact with the entire axial recess, but can be designed to rest on the axial recess only in partial regions thereof.
  • the axial protrusion in a predetermined circumferential area has a shape, in particular a rectangular shape, which protrudes radially over a hollow cylindrical shape of the axial protrusion and which enables the housing cover to be positioned in a predetermined manner on the electrical machine.
  • the radially protruding shape can be, for example, a partially round and / or angular, e.g. have triangular geometry.
  • the radially projecting shape can be arranged facing an upper side of the housing and a corresponding rectangular shape of the axial recess can be arranged facing an upper side of the electrical machine. This can prevent the housing cover from twisting relative to the electrical machine. Due to the rectangular shape, the housing cover can only be mounted on the electrical machine at a predetermined angle, for example.
  • the rectangular shape of the axial projection is formed by a rectangular shape of the stator core, on which an electrical contact connection of at least one stator winding of the stator is formed.
  • the housing cover has fastening means radially outside the stator laminated core for fastening the housing cover to a machine housing of the electrical machine.
  • the fastening means can be formed by receptacles for screws or rivets.
  • pins for inserting the housing cover into the machine housing can be formed on the housing cover.
  • the axial protrusion can be designed to engage in force with the axial recess of the electrical machine in the inserted state, so that the housing cover can also be attached to the electrical machine by means of insertion
  • the housing cover can be closed on a side facing away from the axial projection, so that the housing cover is designed, in a state mounted on the electrical machine, to completely cover an end region of the rotor of the electrical machine.
  • the advantage is that the rotor is protected by the housing cover, so that no contaminants can reach the rotor from the outside, and / or in no other direction, lubricants of the rotor can reach the outside.
  • this has on the side of the axial projection a radially enclosing the stator groove for receiving a sealing element.
  • a sealing element such as a sealing ring can be attached to the connection point between the housing cover and the electrical machine, and the sealing of the rotor to the outside can be further increased.
  • electrical contact connections to at least one stator winding of the stator of the rotor position sensor are electrically connected to electrical contacts of an integrated plug contact element in the housing cover. This enables the stator to be contacted from the outside of the housing cover by means of a plug contact. This is particularly advantageous if the closed housing cover completely covers the stator in the assembled state.
  • the plug contact enables simple and reliable contacting of the stator from the outside by means of a plug.
  • the plug contact element can provide a plug receptacle or socket, the electrical contacts of which are each connected to connections of the stator.
  • the connection can be realized by means of electrical conductors integrated in the housing cover, for example punched grids, which are guided through a housing or on the housing of the housing cover, so that the mounted housing cover, for example, the rotor and the Can hide the stator of the rotor position sensor and thereby enables an external connection to the stator of the rotor position sensor.
  • the electrical conductors extend in the housing cover from the stator to the plug connection or plug contact element.
  • Electrical contact surfaces of the integrated plug contacts and / or the electrical conductors which are guided through the housing cover or a housing part of the provided stator device to at least one stator winding of the stator are electrically connected to the stator winding.
  • the electrical conductors can be contacted with the stator by means of a welded connection or a clamp connection.
  • the stator of the housing cover provides the stator of a rotor position sensor of the electrical machine and the rotor of the electrical machine, around which the stator of the housing cover can be arranged by mounting the housing cover on the electrical machine, provides the rotor comprising a rotor winding of the rotor position sensor.
  • the stator of the housing cover is therefore part of a rotor position sensor of an electrical machine for detecting an angular position of the rotor of the electrical machine. An electrical machine with a rotor position sensor is described below.
  • the electrical machine comprises a housing cover according to one of the preceding claims with a stator of the rotor position sensor and an axial projection formed by a stator laminated core of the rotor position sensor.
  • a machine housing has a radial axial recess formed around the rotor in which the axial projection of the housing cover is received. Due to a positive engagement of the axial projection with the axial recess, the stator of the rotor position sensor is centered around the rotor of the electrical machine.
  • the housing cover is fastened to a machine housing of the electrical machine by means of fastening means.
  • the electrical machine and the housing cover mounted on the electrical machine are thus designed to be adapted to one another, so that the axial recess of the Machine housing can take the axial protrusion of the housing cover in a form-fitting manner. Due to the self-centering caused by the axial projection of the stator of the housing cover around the rotor of the electrical machine, the reliability of a measurement of the rotor position by the rotor position sensor can be increased.
  • the electrical machine can be provided in a drive of an electrically driven motor vehicle.
  • the invention also relates to a method for mounting a stator of a rotor position sensor on an electrical machine, wherein the stator of the rotor position sensor is molded in egg NEN housing cover and protruding axially on one side of the housing cover axially over the housing cover an axial projection of the housing cover bil det.
  • the method comprises introducing the axial protrusion of the housing cover into an axial recess formed around a rotor of the electrical machine on an end face of a machine housing of the electrical machine, so that when the axial protrusion is received in the axial recess, the stator is self-centered around the Rotor is effected.
  • the method further comprises fixing the housing cover in the position centered on the machine housing with respect to the rotor.
  • the method enables simple mounting of a stator of a rotor position sensor around a rotor of the rotor position sensor.
  • the self-centering caused by the axial projection of the housing cover makes it possible to ensure an automatic centered arrangement of the stator around the rotor when mounting.
  • the invention thus ensures precise alignment and centering of the rotor position sensor stator with the rotor position sensor rotor, for example despite an indirect connection of the rotor position sensor stator to a housing e.g. an electric axle drive.
  • Figure 1 shows an embodiment of a housing cover with an integrated stator.
  • Fig. 3 shows a schematic section of an electrical machine with a montier th housing cover.
  • Fig. 1 shows an embodiment of a housing cover 10 with an integrated stator 11, which is designed as a stator of a rotor position sensor.
  • the stator 1 1 comprises a stator laminated core 12, which is taken up in a housing 13 of the housing cover 10.
  • the housing 13 is, for example, an injection molded housing and has a side 13a, e.g. a front of the housing, which was in an assembled state of the housing cover 10 on an electrical machine is aligned with an end face of the electrical machine.
  • the stator laminated core 12 or its flattening protrudes axially on the side 13a above the housing 13 and thereby forms an axial projection 14 of the housing cover 10.
  • the first region 12a of the axial extent of the stator core is thus formed freely from the housing 13 and serves to insert a further component, e.g. an electrical machine to be centered.
  • the stator laminated core 12 of the rotor position sensor stator 11 is, for example, punch-packed and accommodated in the cover 13 via the second region 12b of its axial extent.
  • the stator laminated core 12 can either be encapsulated by the cover 13 or can be firmly received in it by means of a press fit.
  • the axial projection 14 is adapted to an axial recess of a housing of an electrical machine, on which the housing cover is to be mounted.
  • an outer diameter 15 of a circular cross section of the axial projection is adapted to an outer diameter of the axial recess. According to the example shown in FIG.
  • the axial protrusion 14 has a rectangular shape 16 which projects radially beyond a hollow cylindrical region of the axial protrusion 14 and on which electrical contact connections 17a, 17b of a stator winding of the stator 11 are formed.
  • the housing 13 has, for example, a plug region 13b with a plug connection. Electrical connection contacts of the plug connection are by means of an electrical conductor guided in the housing 13, e.g. a lead frame, with the contact connections 17a, 17b of the stator winding electrically connected.
  • the housing 13 has on its front side 13a a groove 18 formed around the stator 11, in which a sealing ring can be introduced.
  • cylindrical cavities or screw tabs for receiving screws ben form fasteners 19a, 19b of the housing cover 10.
  • the rotor position sensor stator 1 1 is thus received and fixed in a cover, by means of which it is attached to the housing of a further component, e.g. attached to an electric machine who can.
  • the screw tabs are axially displaced with respect to the first region of the axial projection in the direction of the second region of the axial projection.
  • Fig. 2 shows the housing cover 10 schematically in a side sectional view. It can be clearly seen that the first axial region 12a of the stator 11 protrudes axially on the side 13a beyond the housing 13 and forms the axial projection 14 of the housing cover 10.
  • the housing 13 has a closed surface on a rear side 13c of the housing cover facing away from side 13a.
  • An integrated plug contact element 20 is provided in the plug region 13b, the electrical contact Conclusions about an electrical conductor 21 integrated in the housing 13 are contacted with electrical connections 17a, 17b of the stator 12.
  • Fig. 3 shows a schematic section of an electrical machine 30 with a housing cover 10 mounted according to the inventive method.
  • the electrical machine 30 has a housing 31 in which a rotor 33 mounted by means of a ball bearing 32 is received. An end region 33a of the rotor 33 with a rotor winding is centered in the stator core 12 of the housing cover 10.
  • the axial projection 14 of the housing cover is received in an axial recess 34 of the housing 31 of the electrical machine 30 formed around the rotor 33.
  • the housing cover 10 is fastened to the housing 31 of the machine by means of screws 35 and the fastening means 19a, 19b of the housing cover 10, so that the end region 33a of the rotor 33 is completely enclosed by the housing cover 10 and the housing 31.
  • the stator 12 can be contacted in the assembled state of the housing cover 10, as shown in FIG. 3, for example by means of the plug contact element 20.
  • the invention provides a concept for centering a stator of a rotor position sensor around a rotor of the rotor position sensor.
  • the axial projection of the housing cover with the stator of the rotor position sensor enables simple and reliable self-centering of the stator around the rotor during assembly.
  • the rotor position sensor covered by the housing cover can be electrically contacted from the outside in a simple manner by means of the external plug contact.

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

Abstract

L'invention concerne un couvercle de carter (10) conçu pour un moteur électrique (30). Ce couvercle de carter (10) comprend, moulé dans ledit couvercle de carter (10), un empilement de tôles statoriques (12) d'un stator (11) d'un capteur de position de rotor, qui sur un côté (13a) du couvercle de carter (10) fait saillie axialement sur le couvercle de carter (10) et forme une structure saillante (14) axiale du couvercle de carter (10). Cette structure saillante (14) axiale est adaptée à un évidement (34) axial formé autour d'un rotor (33) du moteur électrique (30) sur une face frontale de carter du moteur électrique (30), de sorte que lorsque la structure saillante (14) axiale du couvercle de carter (10) est logée dans l'évidement (34) axial du moteur électrique (30), il se produise un auto-centrage du stator (11) autour du rotor (33). Cette invention concerne en outre un moteur électrique (30) comprenant un tel couvercle de carter (10), ainsi qu'un procédé pour monter un stator (11) d'un capteur de positon de rotor sur un rotor (33) de capteur de positon de rotor.
PCT/EP2019/078870 2018-10-30 2019-10-23 Couvercle de carter conçu pour un moteur électrique, moteur électrique et procédé de montage WO2020089010A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018218529.8A DE102018218529A1 (de) 2018-10-30 2018-10-30 Gehäusedeckel für eine elektrische Maschine, elektrische Maschine und Montageverfahren
DE102018218529.8 2018-10-30

Publications (1)

Publication Number Publication Date
WO2020089010A1 true WO2020089010A1 (fr) 2020-05-07

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Application Number Title Priority Date Filing Date
PCT/EP2019/078870 WO2020089010A1 (fr) 2018-10-30 2019-10-23 Couvercle de carter conçu pour un moteur électrique, moteur électrique et procédé de montage

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DE (1) DE102018218529A1 (fr)
WO (1) WO2020089010A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020100271A1 (de) * 2020-01-09 2021-07-15 Bayerische Motoren Werke Aktiengesellschaft Rotorlagesensor und Motorbaugruppe
DE102020215978A1 (de) * 2020-12-16 2022-06-23 Robert Bosch Gesellschaft mit beschränkter Haftung Sensorbaugruppe für eine elektrische Antriebsvorrichtung, elektrische Antriebsvorrichtung für ein Fahrzeug und Verfahren zur Herstellung einer Sensorbaugruppe
DE102023102470A1 (de) 2023-02-01 2024-08-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sensoreinheit zur Winkellagedetektion eines Rotors in einer elektrischen Maschine eines Kraftfahrzeugs

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113949A1 (en) * 2004-01-30 2006-06-01 Shinji Nishimura Method for detecting/adjusting synchronous motor rotor position
JP2008104318A (ja) * 2006-10-20 2008-05-01 Mitsubishi Electric Corp 制御装置一体型回転電機
JP2009126189A (ja) 2007-11-19 2009-06-11 Mazda Motor Corp 車両のホイール駆動装置
US20090284106A1 (en) * 2008-05-19 2009-11-19 Mitsubishi Electric Corporation Rotary electric machine integrated with control device
US20110241498A1 (en) * 2008-09-03 2011-10-06 Societe De Technologie Michelin Device for mounting a resolver in an electric machine
US20140091682A1 (en) * 2011-08-08 2014-04-03 Mitsubishi Electric Corporation Controller-integrated electric rotating machine and assembling and disassembling methods of the same
DE102015217875A1 (de) 2015-09-17 2017-03-23 Siemens Aktiengesellschaft Antriebssystem mit einer elektrischen Maschine und einem Getriebe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4425045B2 (ja) * 2004-04-14 2010-03-03 三菱電機株式会社 レゾルバ
JP4514716B2 (ja) * 2006-01-16 2010-07-28 三菱電機株式会社 レゾルバ
JP5722096B2 (ja) * 2011-03-30 2015-05-20 株式会社ケーヒン レゾルバ
KR20140002395A (ko) * 2012-06-29 2014-01-08 삼성전기주식회사 레졸버 조립구조 및 이를 포함한 모터 어셈블리

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060113949A1 (en) * 2004-01-30 2006-06-01 Shinji Nishimura Method for detecting/adjusting synchronous motor rotor position
JP2008104318A (ja) * 2006-10-20 2008-05-01 Mitsubishi Electric Corp 制御装置一体型回転電機
JP2009126189A (ja) 2007-11-19 2009-06-11 Mazda Motor Corp 車両のホイール駆動装置
US20090284106A1 (en) * 2008-05-19 2009-11-19 Mitsubishi Electric Corporation Rotary electric machine integrated with control device
US20110241498A1 (en) * 2008-09-03 2011-10-06 Societe De Technologie Michelin Device for mounting a resolver in an electric machine
US20140091682A1 (en) * 2011-08-08 2014-04-03 Mitsubishi Electric Corporation Controller-integrated electric rotating machine and assembling and disassembling methods of the same
DE102015217875A1 (de) 2015-09-17 2017-03-23 Siemens Aktiengesellschaft Antriebssystem mit einer elektrischen Maschine und einem Getriebe

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