WO2021122255A1 - Dispositif d'isolation, dispositif de stator, machine électrique et procédé de fabrication d'un dispositif de stator - Google Patents

Dispositif d'isolation, dispositif de stator, machine électrique et procédé de fabrication d'un dispositif de stator Download PDF

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Publication number
WO2021122255A1
WO2021122255A1 PCT/EP2020/085407 EP2020085407W WO2021122255A1 WO 2021122255 A1 WO2021122255 A1 WO 2021122255A1 EP 2020085407 W EP2020085407 W EP 2020085407W WO 2021122255 A1 WO2021122255 A1 WO 2021122255A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
stator
receiving space
axial direction
insulation device
Prior art date
Application number
PCT/EP2020/085407
Other languages
German (de)
English (en)
Inventor
Nils Krais
Stefan Denzinger
Original Assignee
Valeo Siemens Eautomotive Germany Gmbh
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 Valeo Siemens Eautomotive Germany Gmbh filed Critical Valeo Siemens Eautomotive Germany Gmbh
Priority to EP20824510.0A priority Critical patent/EP4078777A1/fr
Priority to CN202080087617.5A priority patent/CN115136462A/zh
Publication of WO2021122255A1 publication Critical patent/WO2021122255A1/fr

Links

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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • stator device electrical machine and method for manufacturing a stator device
  • the present invention relates to an insulation device for a stator having hairpin windings.
  • the invention relates to a stator device, an electrical machine and a method for producing a stator device.
  • Stators with hairpin windings are the focus of industrial development efforts, especially in the field of electric drives for vehicles. Compared to distributed windings, they allow in particular a largely automated production, because there is no need for laborious pulling in of windings formed from thin wires.
  • the document DE 102012219668 A1 discloses an electric motor with a stator having a plurality of slots. Hairpin bobbins are set in the slots. Furthermore, an electrically conductive connector is provided which surrounds the end regions of two hairpin coils in order to electrically connect the two hairpin coils to one another. An insulating cap is placed on the connector.
  • the arrangement of individual insulation caps on the end windings of the hairpin windings is very complex.
  • this is also time-consuming, sometimes results in soiling from the powder coating, and there is a risk that the coating can reach undesired locations on the stator.
  • cracks can arise in a powder coating obtained in this way.
  • the invention is therefore based on the object of providing a possibility for the improved, in particular less expensive, more durable and less dirt-free insulation of end windings of a stator having hairpin windings.
  • an insulation device for a stator having hairpin windings comprising a first wall which extends along an axial direction and a circumferential direction with respect to a central axis of the insulation device and a plurality of second walls which each extend along the axial direction and a Radialrich device extend with respect to the central axis and protrude from the first wall, where in pairs of adjacent second walls there are boundaries of a receiving space for a winding head of the hairpin windings in the circumferential direction and the first wall forms a delimitation of a respective receiving space in the radial direction.
  • the invention is based on the idea of realizing the insulation of the winding heads by an insulation device which can be attached to the end of the stator and which provides a receiving space for winding heads that are to be insulated from each other.
  • the receiving space forms boundaries in the radial direction and in the circumferential direction through the first wall and the second walls and thus defines required air and creepage distances between adjacent winding heads in the radial direction.
  • the isolation of the winding heads can thus advantageously be carried out in a single operation by attaching the Isolationsvorrich device, whereby the isolation becomes considerably less complex in terms of both time and manufacturing costs.
  • an expensive and polluting powder coating can be dispensed with.
  • the insulation device enables a more durable insulation with regard to the risk of crack formation in the case of a powder coating.
  • the insulation device is preferably formed from an electrically insulating plastic.
  • the insulation device according to the invention is typically designed as an injection-molded part.
  • the insulation device according to the invention can expediently have at least twelve, preferably at least twenty-four, particularly preferably at least thirty-six, very particularly preferably at least forty-eight second walls.
  • Hairpin windings in the context of the present invention are windings that are formed from essentially rigid, possibly curved, pins.
  • the term “hairpin winding” is also known for hairpin winding, so that the term “hairpin” - also in word combinations - can be replaced by “hairpin”.
  • the term “pin” can also be replaced by “metal rod”.
  • the insulation device according to the invention preferably further comprises a third wall which extends radially spaced from the first wall along the axial direction and the circumferential direction and forms a further delimitation of the respective receiving space in the radial direction. In this way, radial insulation of the winding heads on both sides is achieved.
  • the second walls cross the first wall, so that the pairs each form boundaries of a second receiving space, which is radially spaced from the first receiving space, for a winding head of the hairpin windings in the circumferential direction and the first wall forms a boundary of a respective second receiving space in the radial direction.
  • an effective insulation of hairpin windings which have two winding heads at respective positions in the circumferential direction, can be realized.
  • the insulation device further comprises a fourth wall, which extends along the axial direction and the circumferential direction at a radial distance from the first wall, so that the fourth wall has a further one Delimitation of the respective second receiving space in the radial direction ausbil det. In this way, radial isolation of the second receiving spaces on both sides can be realized.
  • the insulation device also includes a rear wall from which the first wall and the second walls protrude and which forms a delimitation of the receiving space in the axial direction.
  • the delimitation is designed in such a way that the winding heads can protrude into the receiving space on a side of the first receiving space opposite the rear wall.
  • the rear wall forms a delimitation of the respective second receiving space in the axial direction.
  • the delimitation is designed such that the end winding can protrude into the second receiving space on a side opposite the rear wall.
  • the third wall protrudes from the rear wall.
  • the fourth wall protrudes from the rear wall.
  • the insulation device can advantageously be adapted to the shape of a stator housing.
  • the isolation device according to the invention particularly advantageously comprises one or more latching elements for positively locking the isolation device.
  • the isolation device can be attached with little effort, but at the same time robustly, by means of a latching connection.
  • the invention also relates to an insulation device for a stator having hairpin windings, comprising a first wall which extends along an axial direction device and a circumferential direction with respect to a central axis of the Isolationsvorrich device and a plurality of second walls, which each extend along the axial direction and a radial direction with respect to the central axis and protrude from the first wall, pairs of adjacent second walls each delimiting a receiving space for a winding head form the hairpin windings in the circumferential direction and the first wall forms a delimitation of a respective receiving space in the radial direction.
  • the isolation device comprises one or more latching elements for positively locking the isolation device.
  • stator device for an electrical machine comprising an insulation device according to the invention and the stator, the end windings being introduced into the receiving spaces.
  • each winding head can expediently be formed from at least two cohesively connected hairpin elements of the hairpin windings.
  • the hairpin elements are typically welded or soldered.
  • the hairpin windings of the stator device according to the invention can be formed from hairpin elements.
  • the hairpin elements or some of the hairpin elements can be U-pins, for example, which penetrate stator slots, are bent over on an end face of the stator opposite the winding heads and are guided back through another stator slot.
  • the hairpin elements or some of the hairpin elements can also be I-pins, which are materially connected to other hairpin elements on both end faces of the stator.
  • the hairpin windings typically have an electrically insulating surface layer outside the insulation device.
  • the stator device comprises a stator housing, it being possible for the insulation device to be attached to the stator housing, preferably to a bearing plate of the stator housing.
  • the stator housing expediently comprises locking elements for producing a locking connection with the or a respective locking element of the isolation device.
  • the insulation device is attached to the stator by means of a potting compound arranged in at least some of the receiving spaces, enclosing the winding heads received in the receiving spaces and / or by means of an adhesive.
  • the object on which the invention is based is also achieved by an electrical machine, comprising a stator device according to the invention.
  • the electrical cal machine is typically designed to drive an electrically drivable vehicle, for example an electric vehicle (BEV) or a hybrid vehicle.
  • BEV electric vehicle
  • the central axis of the Isolationsvor direction corresponds to an axis of rotation of the electrical machine.
  • the object on which the invention is based is also achieved by a method for producing a stator device, comprising the following steps: providing an insulation device according to the invention; Providing the stator with the hairpin windings; Arranging the isolation device on the Wickelköp fen the hairpin windings, so that the winding heads are introduced into the receiving spaces; and attaching the isolation device.
  • the manufacturing method according to the invention further comprises the following steps: providing a Statorge housing; wherein the isolation device is attached to the stator housing, preferably to egg nem end shield of the stator housing.
  • the following steps can be provided: arranging a potting compound and / or that of an adhesive in at least some of the receiving spaces so that the Isolation device is attached to the stator after curing of the potting compound and / or the adhesive.
  • Fig. 1 is a sectional view of an embodiment of an electrical machine's rule with an embodiment of the stator device according to the invention and an embodiment of the insulation device according to the invention;
  • FIG. 2 shows a detailed view of FIG. 1 in the area of a first and second exception room of the isolation device.
  • FIG. 5 shows a detailed view of a latching element of the insulation device.
  • FIG. 1 is a sectional illustration of an exemplary embodiment of an electrical machine 1.
  • the electrical machine 1 comprises a stator device 2, within which a rotor 4 connected non-rotatably to a shaft 3 is rotatably mounted.
  • the stator device 2 comprises a stator 5, which is formed from a multiplicity of historical individual laminations and has stator slots formed axially with respect to an axis of rotation of the rotor 4. Hairpin windings 6 are received in the stator slots of the stator 5 and form winding heads 8 on a first end face.
  • the stator device 2 furthermore comprises an exemplary embodiment of an isolation device 9.
  • FIG. 2 is a detailed view of FIG. 1 in the area of a first receiving space 10 and a second receiving space 11 of the insulation device 9.
  • the insulation device 9 comprises a first wall 12, which extends along an axial direction and a circumferential direction with respect to a central axis, which here is identical to the axis of rotation of the rotor 4 (see FIG. 1).
  • the Isolationsvor device 9 further comprises a plurality of second walls 13a, 13b (see FIG. 3), of which only the second wall 13a is visible in FIG. 2.
  • the second walls 13a, 13b each extend along the axial direction and a radial direction with respect to the central axis and protrude from the first wall 12 in the Ra dial direction. Adjacent pairs of the second walls 13a, 13b each form a delimitation of the first receiving space 10 for receiving a winding head 8 in the circumferential direction.
  • the first wall 12 forms an inner boundary Be a respective first receiving space 10 in the radial direction.
  • the insulation device 9 comprises a third wall 14, which extends along the axial direction and the circumferential direction at a radially outward distance from the first wall 12.
  • the third wall 14 forms an outer boundary of the respective first receiving space 10 in the radial direction.
  • the second walls 13a, 13b and the first wall 12 intersect so that the pairs of the adjacent second walls 13a, 13b each form boundaries of the second receiving spaces 11 in the circumferential direction.
  • the first Wall 12 forms an outer boundary of the respective second receiving space 11 in the radial direction.
  • One of the winding heads 8 is received in each of the second receiving spaces 11.
  • a fourth wall 15 of the insulation device 9 extends along the axial direction and the circumferential direction radially inwardly spaced from the first wall 12, so that the fourth wall 15 forms an inner boundary of the respective second receiving space 11 in the radial direction.
  • the insulation device 9 includes a rear wall 16 from which the first wall 12, the second walls 13a, 13b, the third wall 14 and the fourth wall 15 protrude in the axial direction.
  • the rear wall 16 forms a delimitation of the first and second receiving spaces 10, 11 in the axial direction.
  • the rear wall 16 is inclined relative to the first wall 12 with respect to the axial direction.
  • the insulation device 9 in the present example has forty-eight second walls 13a, 13b which are arranged equidistantly in the circumferential direction.
  • the number of first receiving spaces 10 and the number of second receiving spaces 11 correspond to the number of second walls 13a, 13b.
  • the insulation device 9 further comprises three locking elements 17, which are arranged equidistantly from one another in the circumferential direction on the rear wall 16.
  • FIG. 5 is a detailed view of a latching element 17. It can be seen that it protrudes axially from the rear wall 16 and has a latching lug 18 extending radially inward.
  • the stator device 2 has a stator housing 19 which comprises a bearing plate 20 arranged on the end face 7.
  • the Isola tion device 9 rests on the bearing plate 20, the inclination of the rear wall 16 tracks an inclination of the bearing plate 20.
  • the end shield 20 also includes locking elements 21, which are designed opposite the locking elements 17 of the Isola tion device 9 and with these form a positive locking connection for fastening the isolation device 9 on the stator housing 19 or on the end shield 20.
  • the stator housing 19 also includes a second end shield, which is not shown in FIG. 1 for reasons of clarity and is arranged on a second end face 22 opposite the first end face 7.
  • the winding heads 8 are each formed from free ends of hairpin elements 23, 24 that are connected to one another in a materially bonded manner.
  • the hairpin elements 23, 24 forming the winding heads 8 are each U-pins, which extend from the free end shown in FIG. 2 through the stator slots, are bent at the second end face 22 by 180 ° and from there pass through another stator slot extend axially. There they are cohesively connected to other hairpin elements according to a predetermined winding scheme.
  • stator device 2 An exemplary embodiment of a production method for the stator device 2 is described below.
  • the insulation device 9 is provided.
  • the stator 5 is provided.
  • the insulation device 9 is arranged on the winding heads 8 of the hairpin windings 6, so that the winding heads 8 are inserted into the receiving spaces 10, 11.
  • the insulation device 9 is then attached. This takes place in that the insulation device 9 is connected to the end shield 20 by means of the latching connection.
  • a potting compound or an adhesive can be filled in, the winding heads 8 being inserted into the receiving spaces 10, 11 in such a way that the potting compound or the adhesive at least partially encloses them.
  • the insulation device 9 is attached to the stator 5.

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

Abstract

L'invention concerne un dispositif d'isolation (9) pour un stator (5) ayant des bobines en épingle à cheveux (6), le dispositif d'isolation comprenant : une première paroi, qui s'étend le long d'une direction axiale et d'une direction périphérique par rapport à un axe central du dispositif d'isolation (9) ; une pluralité de deuxièmes parois, qui s'étendent chacune le long de la direction axiale et d'une direction radiale par rapport à l'axe central et font saillie de la première paroi, des paires de deuxièmes parois adjacentes formant des limites d'espaces de réception respectifs pour une tête de bobine (8) des bobines en épingle à cheveux (6) dans la direction périphérique, et la première paroi formant une limite de chaque espace de réception dans la direction radiale ; et un ou plusieurs éléments d'arrêt (17) pour la fixation par complémentarité de formes du dispositif d'isolation (9).
PCT/EP2020/085407 2019-12-17 2020-12-10 Dispositif d'isolation, dispositif de stator, machine électrique et procédé de fabrication d'un dispositif de stator WO2021122255A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20824510.0A EP4078777A1 (fr) 2019-12-17 2020-12-10 Dispositif d'isolation, dispositif de stator, machine électrique et procédé de fabrication d'un dispositif de stator
CN202080087617.5A CN115136462A (zh) 2019-12-17 2020-12-10 绝缘装置、定子装置、电机和用于制造定子装置的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019134792.0 2019-12-17
DE102019134792.0A DE102019134792A1 (de) 2019-12-17 2019-12-17 Isolationsvorrichtung, Statorvorrichtung, elektrische Maschine und Verfahren zur Herstellung einer Statorvorrichtung

Publications (1)

Publication Number Publication Date
WO2021122255A1 true WO2021122255A1 (fr) 2021-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/085407 WO2021122255A1 (fr) 2019-12-17 2020-12-10 Dispositif d'isolation, dispositif de stator, machine électrique et procédé de fabrication d'un dispositif de stator

Country Status (4)

Country Link
EP (1) EP4078777A1 (fr)
CN (1) CN115136462A (fr)
DE (1) DE102019134792A1 (fr)
WO (1) WO2021122255A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021208851A1 (de) 2021-08-12 2023-02-16 Valeo Eautomotive Germany Gmbh Stator für eine elektrische Maschine, Verfahren zur Herstellung eines Stators, elektrische Maschine und Fahrzeug
DE102022104442A1 (de) * 2022-02-24 2023-08-24 Schaeffler Technologies AG & Co. KG Isolationsring, Stator und Verfahren zur Herstellung eines Stators

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000209802A (ja) * 1999-01-18 2000-07-28 Denso Corp 接合部の絶縁構造、回転電機の絶縁構造およびその製造方法
DE10130117A1 (de) * 2001-06-22 2003-01-30 Minebea Co Ltd Gehäusedeckel für einen Elektromotor, insbesondere für einen elektronisch kommutierten Gleichstrommotor
DE102004027653A1 (de) * 2003-09-02 2005-03-31 Sew-Eurodrive Gmbh & Co. Kg Elektromotor
EP2372879A2 (fr) * 2010-03-31 2011-10-05 Fujitsu General Limited Stator de moteur et compresseur rotatif
US20120274156A1 (en) * 2011-04-29 2012-11-01 Chamberlin Bradley D Electric machine module insulation system and method
EP2642637A2 (fr) * 2012-03-23 2013-09-25 Fujitsu General Limited Moteur moulé
DE102012219668A1 (de) 2012-05-14 2013-11-14 Hyundai Mobis Co., Ltd. Verfahren zum Binden von Statorspulen eines Motors
DE102018203993A1 (de) * 2018-03-15 2019-09-19 Zf Friedrichshafen Ag Isoliereinheit für eine elektrische Maschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015216322A1 (de) * 2015-08-26 2017-03-02 Continental Automotive Gmbh Plastikkappen zur elektrischen Isolierung
DE102017214958A1 (de) * 2017-08-28 2019-02-28 Zf Friedrichshafen Ag Verschaltungsanordnung für eine elektrische Maschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000209802A (ja) * 1999-01-18 2000-07-28 Denso Corp 接合部の絶縁構造、回転電機の絶縁構造およびその製造方法
DE10130117A1 (de) * 2001-06-22 2003-01-30 Minebea Co Ltd Gehäusedeckel für einen Elektromotor, insbesondere für einen elektronisch kommutierten Gleichstrommotor
DE102004027653A1 (de) * 2003-09-02 2005-03-31 Sew-Eurodrive Gmbh & Co. Kg Elektromotor
EP2372879A2 (fr) * 2010-03-31 2011-10-05 Fujitsu General Limited Stator de moteur et compresseur rotatif
US20120274156A1 (en) * 2011-04-29 2012-11-01 Chamberlin Bradley D Electric machine module insulation system and method
EP2642637A2 (fr) * 2012-03-23 2013-09-25 Fujitsu General Limited Moteur moulé
DE102012219668A1 (de) 2012-05-14 2013-11-14 Hyundai Mobis Co., Ltd. Verfahren zum Binden von Statorspulen eines Motors
DE102018203993A1 (de) * 2018-03-15 2019-09-19 Zf Friedrichshafen Ag Isoliereinheit für eine elektrische Maschine

Also Published As

Publication number Publication date
EP4078777A1 (fr) 2022-10-26
CN115136462A (zh) 2022-09-30
DE102019134792A1 (de) 2021-06-17

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