WO2017194264A1 - Stator d'une machine électrique muni d'un dispositif d'interconnexion pour bobines de stator et machine électrique équipée d'un tel stator - Google Patents

Stator d'une machine électrique muni d'un dispositif d'interconnexion pour bobines de stator et machine électrique équipée d'un tel stator Download PDF

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Publication number
WO2017194264A1
WO2017194264A1 PCT/EP2017/058912 EP2017058912W WO2017194264A1 WO 2017194264 A1 WO2017194264 A1 WO 2017194264A1 EP 2017058912 W EP2017058912 W EP 2017058912W WO 2017194264 A1 WO2017194264 A1 WO 2017194264A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
coils
connection
electrical machine
interconnection device
Prior art date
Application number
PCT/EP2017/058912
Other languages
German (de)
English (en)
Inventor
Martin Geiger
Matthias Weidner
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 WO2017194264A1 publication Critical patent/WO2017194264A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the present invention relates to a stator of an electric machine with a wiring arrangement for stator coils according to the preamble of claim 1.
  • a generic stator is known from EP 1 184 957 B1, in which an interconnecting device with a plurality of axially staggered concentric connection conductors is arranged axially adjacent to a plurality of stator coils fixed to the stator in a ring-shaped manner and attached to the winding bodies of these stator coils.
  • the coil ends occur axially from the coils and are connected to terminal areas, which in each case protrude from the connecting conductors to a radially outer peripheral region of the interconnection means or are led out.
  • the object of the present invention is to provide a stator of an electrical machine of the type mentioned at the outset and an electrical machine with an assembly-safe and easy-to-install interconnecting device for the stator coils.
  • a stator of an electric machine with an annular stator lamination which is fixed to a stator and on which a number of stator coils is arranged and wherein the coil ends project axially from the stator lamination.
  • the stator comprises, on the stator side, a stator coil interconnection device which has a plurality of mutually coaxially arranged and mutually insulated connection conductors arranged axially adjacent to the stator coils, and wherein the connection conductors comprise coil terminal areas for the coil ends and power terminal areas for powering the electrical machine.
  • the proposed stator is characterized in that the interconnection device is arranged outside of the stator coils and thus on the stator carrier and / or on a component fixedly connected thereto and is axially supported. In this way, forces acting on the interconnection device, in particular contacting forces, can be kept away from the coils themselves and be dissipated onto the stator carrier and / or other components.
  • the coil connection areas may be formed on the front side of the interconnection device, whereby a sufficient space for engagement of an assembly tool is given.
  • the coil ends can thereby be connected in particular under the action of an axial contacting force directed toward the stator lamination stack.
  • the interconnection device for arranging the connection conductors can have a plastic carrier element and a reinforcing metallic reinforcing element reinforcing it, in particular a sheet metal element which extends in the radial direction over the coil connection regions of the connection conductors to receive contacting forces.
  • the reinforcing element and the plastic carrier element can proceed, for example, as a common hybrid component and be produced, for example, by a casting process.
  • the reinforcing element can thus be axially surrounded on both sides by plastic.
  • the reinforcing element and the plastic carrier element can also be connected to one another by means of a non-detachable connection, in particular a rivet connection or the like.
  • the reinforcing element can be arranged axially between the stator coils and the connecting conductors.
  • the fixing or the fastening and the axial support of the interconnection device on the stator carrier or on a component permanently connected thereto can advantageously be effected by the reinforcing element and in particular by means of an axial connecting section provided on the reinforcing element.
  • an axial gap can be formed between the interconnection device and the coils, which permits the passage of a coolant, in particular an air flow or a cooling fluid, which is in heat transfer with the coils in the circumferential direction and / or in the radial direction.
  • a coolant in particular an air flow or a cooling fluid, which is in heat transfer with the coils in the circumferential direction and / or in the radial direction.
  • this creates a movement scope for receiving a deformation when contacting the interconnecting the coil ends.
  • both the reinforcing element and the stator can be designed as sheet metal parts and connected to each other by means of a reliable non-detachable connection, in particular by means of a riveted joint.
  • a stator is a robust prefabricated unit, which can then be used and mounted in a housing of the electrical machine, for example in a transmission housing of a motor vehicle.
  • the stator carrier may preferably be formed as a cylindrical sheet-metal element and the reinforcing element as a substantially disc-shaped body, of the latter for mutual connection of the parts in regions on the inner or Au PHusion several notches as a connection training areas are formed. The remaining gaps can form connection areas for connection to the plastic carrier element.
  • the coils can advantageously be fixed on the stator lamination stack by means of winding bodies, wherein in particular a winding body has a winding region which is formed by a winding carrier and two limbs delimiting the winding region in the axial direction and connected to the winding carrier.
  • a winding body has a winding region which is formed by a winding carrier and two limbs delimiting the winding region in the axial direction and connected to the winding carrier.
  • the present invention further relates to an electric machine having a rotor and a stator, the stator having at least one feature as explained above.
  • Figure 1 is a schematic representation of an electrical machine with a stator and a wiring device.
  • FIG. 2 shows a perspective view of the stator of FIG. 1 with the interconnection device
  • Fig. 3 is an end view of the stator of Fig. 2;
  • FIG. 4a shows an axial section of the stator of FIG. 3 in the region of coil ends entering the interconnection device
  • FIG. 4b shows a further axial section of the stator of FIG. 3 in a connecting region of a reinforcing element with a plastic carrier element of the interconnecting device.
  • Identical objects, functional units or comparable components are denoted by the same reference numerals across the figures. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in one representation, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description. In order to avoid repetition, a multiple description of identical objects, functional units or comparable components in various exemplary embodiments is dispensed with and only differences of the exemplary embodiments are described in this regard.
  • FIG. 1 schematically shows an electric machine 10, more precisely a permanent magnet synchronous machine of internal rotor type, with a rotor 14 rotatable about a rotor shaft 12 with a rotation axis A and with a stator 16 surrounding it radially outside.
  • the rotor 14 comprises a cup-shaped rotor carrier 18, on the cylindrical outer peripheral surface of a laminated laminated rotor core 20 is arranged, which carries a plurality of circumferentially spaced-apart permanent magnets 22.
  • the stator 16 comprises an annular stator carrier 24 which is present here as a cylindrical sheet-metal body, in the central recess of which an annular stator lamination stack 26 likewise formed from laminations is arranged.
  • the axis of rotation A thus forms at the same time the central axis A of the stator.
  • the stator support 24 may, for example, constitute an external or an intermediate housing of the electric machine 10 or be provided for installation in such.
  • a torque acting on the stator 16 is absorbed via a form-locking connection of the stator carrier 24 with the respective connection partner, for which purpose a plurality of recesses 24b distributed on the circumference are provided on the stator carrier for receiving engagement sections of the connection partner not shown here.
  • the laminated stator core 26 comprises an annular stator yoke 30, which bears against the stator carrier 24 and has teeth 32 projecting radially inwards from the latter and which is equipped with stator coils 36 to form a stator winding.
  • These stator coils 36 are wound with the help of two, consisting of a heat-resistant plastic insulating or bobbins 40, 42 of a copper wire around the teeth 32 and are secured against slipping there.
  • the bobbins 40, 42 each include a front side on the laminated core 26 adjacent base region or winding support 40a; 42a and two of them approximately at right angles and on the stator 16 axially projecting leg 40b, c; 42b, c, which define a winding region 43 in the radial direction.
  • the coils 36 are electrically associated with individual strands, for which purpose the coil ends 36a, b are interconnected in a predetermined manner by means of an interconnecting device 38 shown only schematically as a block in FIG. 1.
  • the interconnecting device 38 comprises for this purpose a carrier element 58 made of plastic, in which a plurality of mutually insulated connecting conductors 52, 54, 56 are arranged.
  • the connecting conductors 52, 54, 56 have for connection to the coil ends 36a, b at the end remote from the stator 16 end circumferentially spaced coil connection areas 521; 541, 561 on.
  • the interconnecting device 38 is spatially axially positioned in the embodiment described here outside the stator coils 36 and fixed to the stator 24 and there also axially supported. Alternatively or together with this, a fixing and support can also take place on a component fixedly connected to the stator carrier 24, for example on the stator lamination stack 26.
  • the interconnection device 38 is connected via power connection regions 52c, 54c, 56c of the connection conductors 52, 54 by means of connection conductors 52d, 54d, 56d to power electronics 39a and control electronics 39b to an electrical energy source 39c, which is used to operate the electric machine 10 can apply a variable phase current and amplitude to the winding.
  • the connecting conductors 52, 54, 56 are made of a copper semifinished product, in particular of a copper plate or a copper sheet by means of a stamping process as a ring strip or annular bands.
  • the ring strips are arranged on the stator 16 coaxial with the central axis A and stacked radially to one another.
  • the connecting conductors 52, 54, 56 are in the illustrated embodiment, except for the coil terminal portions 521, 541; 561 approximately completely poured into the plastic matrix of the support member 58.
  • the coil terminal portions 521, 541; 561 are formed as axially highlighted regions on the front side of the annular disk-shaped connecting conductors 52, 54, 56 and thus stand out of the plastic matrix.
  • the coil connection regions 521, 541, 561 of all connection conductors 52, 54, 56 are arranged essentially within a common radial plane, that is to say at the same axial height.
  • the interconnection of the coil ends 36a, b for the realization of a delta connection with three connecting conductors 52, 54, 56 is shown. Furthermore, in each case two adjacent coil ends 36a, b of two circumferentially adjacent coils 36 are each connected to a coil connection region 521, 541, 561 of one of the connection conductors 52, 54, 56.
  • the contacting of the coil ends 36a, b with the connecting conductors 52, 54, 56 takes place cohesively, in particular by brazing, wherein per contact a mainly in the axial direction of the coils directed force of about 500N acts on the coil connection areas.
  • the reinforcing element 60 and the plastic carrier element 58 are non-detachably connected to one another in the radially outer region of the plastic carrier element 58 by means of a plurality of rivet connections 62.
  • a plurality of axial connecting sections 60a in particular axial notches with radially projecting end sections 60b, are provided in the radially outer region of the sheet-shaped reinforcing element 60.
  • These end portions 60b are also connected by means of a non-detachable connection 64, in particular by means of a plurality of rivet connections with a provided on the stator 24 radial collar 24a.
  • the reinforcing element 60 is arranged axially between the stator coils 36 and the connecting conductors 52-56 and that an axial gap 66, in particular an annular space, is formed between the interconnecting device 38 and the coils 36
  • a cooling medium can flow.
  • the coil ends 36 a, b are led out to the interconnection device 38 at the radially outer leg 40 of the winding body 40 that is spatially radially adjacent to the connecting section 60 a.
  • the stator of the electrical machine can be provided with a coating, for example a powder coating, a coating or with a silicone coating, at least in the region of the interconnection device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un stator (16) d'une machine électrique (10), muni d'un noyau feuilleté statorique (26) qui est fixé sur un support de stator (24) et sur lequel sont montées un certain nombre de bobines de stator (36) par les extrémités de bobines (36a, b) qui font saillie du noyau feuilleté statorique dans la direction axiale. Le stator comprend en outre un dispositif d'interconnexion (38) pour les bobines de stator (36), disposé sur la face frontale du noyau feuilleté statorique (26) et présentant plusieurs conducteurs de raccordement (52, 54, 56) agencés coaxialement les uns aux autres et isolés les uns des autres, lesquels sont disposé axialement au voisinage des bobines de stator (36). Les conducteurs de raccordement (52 - 56)comprennent des zones de raccordement aux bobines (52 a - 56 a) pour les extrémités des bobines (36 a, b) et des zones de raccordement de puissance (52 c - 56 c) pour alimenter la machine électrique (10) en courant. Selon l'invention, le dispositif d'interconnexion (38) doit être monté et soutenu axialement à l'extérieur des bobines de stator (36) et par conséquent sur le support de stator (24) et/ou sur un élément solidarisé au support de stator.
PCT/EP2017/058912 2016-05-12 2017-04-13 Stator d'une machine électrique muni d'un dispositif d'interconnexion pour bobines de stator et machine électrique équipée d'un tel stator WO2017194264A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016208150.0A DE102016208150A1 (de) 2016-05-12 2016-05-12 Stator einer elektrischen Maschine mit einer Verschaltungseinrichtung für Statorspulen und elektrische Maschine mit einem derartigen Stator
DE102016208150.0 2016-05-12

Publications (1)

Publication Number Publication Date
WO2017194264A1 true WO2017194264A1 (fr) 2017-11-16

Family

ID=58547533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/058912 WO2017194264A1 (fr) 2016-05-12 2017-04-13 Stator d'une machine électrique muni d'un dispositif d'interconnexion pour bobines de stator et machine électrique équipée d'un tel stator

Country Status (2)

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DE (1) DE102016208150A1 (fr)
WO (1) WO2017194264A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020111760A1 (de) 2020-04-30 2021-11-04 Schaeffler Technologies AG & Co. KG Statoreinheit für eine elektrische Maschine und entsprechende elektrische Maschine
DE102023000728A1 (de) 2022-03-16 2023-09-21 Sew-Eurodrive Gmbh & Co Kg Elektromotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2040465A1 (de) * 1970-08-14 1972-02-17 Siemens Ag Elektrische Maschine mit ringbewickeltem Staender
DE102008064500B4 (de) * 2008-12-23 2011-08-25 Siemens Aktiengesellschaft, 80333 Elektrische Maschine mit Abstützung der Wicklungsschaltung am Statorblechpaket
DE102011088051A1 (de) * 2011-12-08 2013-06-13 Robert Bosch Gmbh Verfahren zum Herstellen einer Verbindungsleiteranordnung für eine elektrische Maschine
US20150357877A1 (en) * 2013-04-26 2015-12-10 Mitsubishi Electric Corporation Rotating electric machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19544830A1 (de) * 1995-12-01 1997-06-05 Mulfingen Elektrobau Ebm Stator für Elektromotoren
JP3617810B2 (ja) 2000-08-31 2005-02-09 三菱電機株式会社 回転電機
DE102005050987A1 (de) * 2005-10-25 2007-05-03 Zf Friedrichshafen Ag Stator für eine elektrische Maschine
EP2139094B1 (fr) * 2008-06-26 2018-10-17 ZF Friedrichshafen AG Stator et arrangement de connection d'une machine électrique
DE102014211923A1 (de) * 2014-06-23 2015-12-24 Zf Friedrichshafen Ag Elektrische Maschine mit einer Statorverschaltungsanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2040465A1 (de) * 1970-08-14 1972-02-17 Siemens Ag Elektrische Maschine mit ringbewickeltem Staender
DE102008064500B4 (de) * 2008-12-23 2011-08-25 Siemens Aktiengesellschaft, 80333 Elektrische Maschine mit Abstützung der Wicklungsschaltung am Statorblechpaket
DE102011088051A1 (de) * 2011-12-08 2013-06-13 Robert Bosch Gmbh Verfahren zum Herstellen einer Verbindungsleiteranordnung für eine elektrische Maschine
US20150357877A1 (en) * 2013-04-26 2015-12-10 Mitsubishi Electric Corporation Rotating electric machine

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