EP4029114A1 - Machine électrique comportant des épaulements entre une pluralité de conducteurs et pattes d'une zone de logement d'enroulement d'un stator ou d'un rotor - Google Patents

Machine électrique comportant des épaulements entre une pluralité de conducteurs et pattes d'une zone de logement d'enroulement d'un stator ou d'un rotor

Info

Publication number
EP4029114A1
EP4029114A1 EP20767719.6A EP20767719A EP4029114A1 EP 4029114 A1 EP4029114 A1 EP 4029114A1 EP 20767719 A EP20767719 A EP 20767719A EP 4029114 A1 EP4029114 A1 EP 4029114A1
Authority
EP
European Patent Office
Prior art keywords
tabs
stator
electrical machine
shoulder
conductors
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Withdrawn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
EP20767719.6A
Other languages
German (de)
English (en)
Inventor
Michael Marsetz
Fabian Oehler
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 EP4029114A1 publication Critical patent/EP4029114A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings
    • H02K1/265—Shape, form or location of the slots
    • 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
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating

Definitions

  • the invention relates to an electrical machine for driving a (hybrid or purely electrically driven) motor vehicle, such as a car, truck, bus or other utility vehicle, with a stator and a rotor mounted rotatably relative to the stator, the stator or the rotor with a winding receiving area having a plurality of radially extending longitudinal slots distributed in a circumferential direction, and each longitudinal slot being provided on a radial side with an opening, which opening is limited in its width by two ends of two tabs directed towards one another in the circumferential direction.
  • a motor vehicle such as a car, truck, bus or other utility vehicle
  • a stator and a rotor mounted rotatably relative to the stator the stator or the rotor with a winding receiving area having a plurality of radially extending longitudinal slots distributed in a circumferential direction, and each longitudinal slot being provided on a radial side with an opening, which opening is limited in its width by two ends of two tabs directed towards one
  • FIG. 8 A generic electrical machine known from the prior art can be seen in FIG. 8 in the area of its stator 2.
  • a plurality of conductors 10 are accommodated within a longitudinal slot 4 of the stator 2.
  • the area of the longitudinal slot 4 receiving the conductor 10 is limited by a wedge K ei.
  • the wedge K is inserted into a receiving contour, whereby inside half of the wedge K remaining tabs are formed, which limit an opening to the environment.
  • each longitudinal slot is provided radially between a chamber area accommodating several conductors and the two tabs with at least one shoulder reducing a width (dimension in the circumferential direction) of the chamber area, the ladder in a radial direction on the at least one shoulder Shoulder are supported.
  • a radial area is created within the conductor through which the magnetic field lines are deflected significantly less abruptly towards the tabs. This increases the efficiency of the electrical machine.
  • the conductors are also supported directly by this shoulder, which means that additional elements such as support wedges are avoided.
  • the at least one shoulder is spaced apart radially from the two tabs, a radial area is made available within which the magnetic flux lines are diverted even more gently. In this context, it is therefore further advantageous if a width of the longitudinal slot remains the same or is further reduced radially from the at least one shoulder in the direction of the tabs.
  • a sensor preferably in the form of a temperature sensor, is arranged in a cavity formed between the at least one shoulder and the tabs.
  • the one located between the at least one shoulder and the tabs is part of a coolant duct and consequently forms the coolant duct. This directly cools the electrical machine and makes it even more powerful.
  • each tab has a conical side flank facing the conductors, the result is an even gentler deflection of the magnetic field lines.
  • each side flank is set in such a way that it runs away from the conductors in the direction of the end.
  • the contour of the longitudinal slot can be produced as simply as possible.
  • the winding receiving area is advantageously formed by a plurality of individual metal sheets arranged as a stack.
  • the at least one shoulder and preferably also the entire longitudinal slot (including the tabs), is produced by punching.
  • an electrical machine with a groove shoulder in front of the tooth tip is implemented in a stator or a rotor.
  • Invention according to a beveled or grooved shoulder is provided in order to place the corre sponding conductor (and an insulation paper) exactly in a groove. This also influences the magnetic field lines.
  • the geometry of the groove shoulder can easily be adapted according to the winding or the insulation paper.
  • the groove shoulder prevents the turns from falling out or slipping out of the groove in the radial direction.
  • Fig. 1 is a schematic cross-sectional view of an electrical machine according to the invention according to a first exemplary embodiment with a stator shown in detail, the section plane being selected so that several longitudinal slots forming a winding receiving area, distributed in the circumferential direction, can be clearly seen,
  • FIG. 2 shows a detailed view of the stator used in FIG. 1 in the area of a longitudinal slot
  • Fig. 3 is a detailed view of the stator, similar to Fig. 2, now several magnetic flux lines built up in operation are shown schematically,
  • Fig. 5 is a detailed view of a longitudinal slot of an electrical machine according to the invention's rule according to a second embodiment, wherein in comparison to the first embodiment in a cavity of the longitudinal slot between several conductors and two tabs of the Wicklungsier receiving area, a temperature sensor is used,
  • FIG. 6 shows a front view of a stator of an electrical machine according to the invention implemented according to a third exemplary embodiment, the stator now having four fastening means receiving holes,
  • FIG. 7 shows a detailed view of the stator according to FIG. 6 in the area of three longitudinal slots, as well as
  • FIG. 8 shows a detailed view of a stator of the prior art in the area of a longitudinal slot.
  • the figures are only of a schematic nature and are used exclusively for understanding the invention.
  • the same elements are provided with the same reference numerals.
  • the different features of the various exemplary embodiments can also be freely combined with one another.
  • FIG. 1 initially shows a basic structure of an electrical machine 1 according to the invention based on a first exemplary embodiment.
  • the electric machine 1 is used as a drive machine in a drive train of a hybrid or purely electric motor vehicle.
  • the electrical machine 1 has, in the usual way, a stator 2 which is fixed to the housing and a rotor 3 which is rotatably mounted relative to this stator 2.
  • the electrical machine 1 is implemented as an internal rotor and the Ro tor 3 is consequently received radially inside the annular stator 2.
  • a winding receiving area 5 designed according to the invention and described in more detail below is implemented in the stator 2.
  • the rotor 3 is consequently equipped with a plurality of magnets which interact with the winding receiving area 5 during operation.
  • a reverse arrangement is selected so that the rotor 3 is equipped directly with the winding receiving area 5.
  • the objectively used th directional information axially, radially and in the circumferential direction / tangentially to an axis of rotation 19 of the rotor 3 are related. Consequently, the axial / axial direction is a direction along / parallel to the axis of rotation 19, the radial / radial direction is a direction perpendicular to the axis of rotation 19 and the circumferential direction is a direction along a circular line running coaxially around the axis of rotation 19.
  • the stator 2 has a plurality of individual metal sheets 17, which are stacked in the axial direction and are implemented as identical parts. One of these individual sheets 17 can be seen in FIG. 1. Each individual sheet 17 and consequently also the entire stacking package / Laminated core on individual laminations 17 is provided with a plurality of longitudinal slots 4 that run in the axial direction and are open inward in the radial direction. These longitudinal slots 4 together form the winding receiving area 5.
  • the longitudinal slots 4 are all implemented the same and are evenly distributed in the circumferential direction.
  • a multiplicity of rod-shaped conductors 10 here six conductors 10
  • which serve to form a corresponding coil winding / coil is arranged within the respective longitudinal slot 4.
  • the longitudinal slot 4 shown as representative for all other longitudinal slots 4 has a chamber region 11 running (exclusively) in the radial direction and having a constant width / constant dimension in the circumferential direction.
  • the cross-sectional view of FIGS. 2 and 4 have a rectangular shape.
  • the conductors 10 are accommodated in the chamber area 11, forming a conductor package / winding package.
  • the conductors 10 are entirely wrapped with an insulating paper 20.
  • the conductor package, i.e. the conductors 10 with the insulation paper 20, are jointly secured in position in the chamber area 11 in the radial direction.
  • two shoulders 12a, 12b projecting in the circumferential direction serve to radially secure the conductors 10, of which only one shoulder 12a or 12b is provided in further embodiments according to the invention.
  • two tabs 9a, 9b directed towards one another in the circumferential direction are implemented as a single material with the respective single sheet 17 / the section of the stator 2 forming the chamber area 11.
  • a first tab 9a consequently has a (first) free end 8a which is directed in the circumferential direction in the opposite direction / facing towards a (second) free end 8b of the second tab 9b.
  • the two tabs 9a, 9b are essentially dimensioned the same.
  • the two ends 8a, 8b of the tabs 9a, 9b are spaced apart in the circumferential direction, so that a radial opening 7 is formed between them.
  • the radial opening 7 is in this embodiment is arranged on a first radial side 6a in the form of a radial inner side of the conductor 10.
  • a continuously encircling ring area 21 of the respective individual sheet 17 extends, as can be seen in FIG. 1.
  • the tabs 9a, 9b consequently form together a tooth head 24 of the stator 2.
  • the two shoulders 12a, 12b like the tabs 9a, 9b, are arranged on opposite peripheral sides. While a first shoulder 12a is arranged on the same circumferential side as the first tab 9a, a second shoulder 12b is arranged on the same circumferential side as the second tab 9b.
  • the two shoulders 12a, 12b have the same dimensions.
  • the shoulders 12a, 12b are arranged radially outside of the tabs 9a, 9b.
  • the shoulders 12a, 12b are spaced apart in a radial direction from the tabs 9a, 9b, so that a corresponding cavity 13 is formed between the inside of the conductor 10 and the tabs 9a, 9b.
  • the shoulders 12a, 12b which also serve as a radial stop / as a radial securing device for the conductors 10, the step-like transition of the magnetic field lines to be seen in FIG. 3 results during operation.
  • the shoulders 12a, 12b are designed so that they reduce the width of the chamber area 11 / are set from the peripheral side edges of the chamber area 11 in the circumferential direction.
  • the longitudinal slot 4 again extends over a transition area 23 to the tabs 9a, 9b.
  • the transition area 23 here has a constant width (dimension in the circumferential direction Rich) and delimits the cavity 13 with.
  • the tabs 9a, 9b in turn extend away to a radial inside of the transition region 23.
  • the tabs 9a, 9b are furthermore provided with side flanks 16a, 16b that run conically in the circumferential direction on a radial side facing the conductors 10.
  • a first side flank 16a (of the first tab 9a) thus increases its distance from the conductors 10 to the along its course free end 8a out.
  • a second side flank 16b (of the second tab 9b) increases its distance from the conductors 10 to the free end 8b along its course.
  • a further component can in principle be attached in the cavity 13.
  • a sensor 14 in the form of a temperature sensor is integrated in the cavity 13.
  • this cavity 13 is designed as part of a coolant duct 15 of a cooling device.
  • a coolant flows axially through this cavity 13 / the stator 2.
  • the opening 7 between the two tabs 9a, 9b is also closed by a cover.
  • tabs 9a, 9b have a non-conical extension and are consequently provided with straight side flanks 16a, 16b that run parallel to the inner sides of the conductors 10 / exclusively axially.
  • a slot geometry (geometry of the longitudinal slot 4) is implemented through which both the winding 10 can be placed in the slot 4 in a more defined manner and the electromagnetic lines take a more targeted guidance and thereby reduce iron losses. Additional components such as slot wedges should be dispensed with. This keeps the number of components, the process steps and therefore the costs low.
  • the solution can, if necessary, create space in the stator 2 (or rotor 3) in order to place the necessary components, such as sensors or tools, in the best possible locations to be able to.
  • Figs. 1 and 2 show a stator 2 in which the inventive solution can be seen.
  • This is a taper (by shoulders 12a, 12b) in front of the tooth head 24.
  • This groove shoulder 12a, 12b replaces, among other things, the previously used groove Key wedges and is used specifically to place the conductors 10 and the insulation paper 20 exactly in the groove 4.
  • the magnetic flux lines are also influenced by this. Since only a small shoulder 12a, 12b is necessary here, the geometry can easily be adapted to match the winding 10 or the insulation paper 20.
  • the groove shoulder 12a, 12b prevents the winding 10 from falling out or shifting in the radial direction.
  • the shoulder 12a, 12b is already introduced in the sheet metal cut, that is, when punching the stator sheet 17, and does not require an additional process step.
  • the inventive design of the slot shoulders 12a, 12b results in a more uniform or only slightly deflected course of those field lines 22 generated (Fig. 3).
  • the groove 4 can be used up to the shoulder 12a, 12b from already tested stators 2 for further stators 2, so that only the area of the tooth tip 24 needs to be changed for optimization.
  • Figures 6 and 7 show this advantage.
  • two different stators 2 of different electrical machines 1 are shown. Their geometrical dimensions and thus also performance classes are different.
  • the geometry of the groove 4 in the area of the winding 10 and the insulation paper 20 of one stator 2 can be transferred to the other.
  • the design is optimized here in the tooth tip 24.
  • the groove geometry in the area of the conductor 10, conductor material and insulation paper 20 are, however, identical in both stators 2 of FIG. 1 and FIG. 6.
  • Another advantage is the possibility of using the area (cavity 13) between the conductor material and the air gap for further components.
  • a temperature sensor 14 in order to be able to determine the temperature of the winding 10, the laminated core or the medium located therein (FIG. 5).
  • the space created between the conductor material and the air gap can also be used for (eg insertion) tools which would not fit through the gap 7 in the tooth tip 24.
  • the groove shoulder 12a, 12b implemented as a taper in front of the tooth tip 24: Control of the placement of the winding 10 in the groove 4 without additional components; - Targeted control of the electro magnetic flux; Use of identical geometries of the groove 4 in the area of the winding 10 for different stators 2 / rotors 3 (which results in a shortened development time); Use of identical wires 10 and insulation paper 20 for different stators 2 / rotors 3 (which leads to financial savings, a lower number of parts and a shortened development time); - Use of space 13 between conductor material and air gap for tools or components (eg sensors 14).

Landscapes

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

Abstract

L'invention concerne une machine électrique (1) destinée à entraîner un véhicule automobile, comprenant un stator (2) et un rotor (3) monté rotatif par rapport au stator (2), le stator (2) ou le rotor (3) étant équipé d'une zone de logement d'enroulement (5) ayant une pluralité de fentes longitudinales s'étendant radialement (4) réparties dans une direction circonférentielle, et chaque fente longitudinale (4) comportant une ouverture (7) vers un côté radial (6a), la largeur de ladite ouverture (7) étant délimitée par deux extrémités (8a, 8b) de deux pattes (9a, 9b) orientées l'une vers l'autre dans la direction circonférentielle, chaque fente longitudinale (4) présentant, entre une zone de chambre (11) recevant une pluralité de conducteurs (10) et les deux pattes (9a, 9b), au moins un épaulement (12a, 12b) réduisant une largeur de la zone de chambre (11), les conducteurs (10) étant soutenus dans une direction radiale par l'au moins un épaulement (12a, 12b).
EP20767719.6A 2019-09-10 2020-08-25 Machine électrique comportant des épaulements entre une pluralité de conducteurs et pattes d'une zone de logement d'enroulement d'un stator ou d'un rotor Withdrawn EP4029114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019124226.6A DE102019124226A1 (de) 2019-09-10 2019-09-10 Elektrische Maschine mit Schultern zwischen mehreren Leitern und Laschen eines Wicklungsaufnahmebereiches eines Stators oder eines Rotors
PCT/DE2020/100743 WO2021047721A1 (fr) 2019-09-10 2020-08-25 Machine électrique comportant des épaulements entre une pluralité de conducteurs et pattes d'une zone de logement d'enroulement d'un stator ou d'un rotor

Publications (1)

Publication Number Publication Date
EP4029114A1 true EP4029114A1 (fr) 2022-07-20

Family

ID=72380870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20767719.6A Withdrawn EP4029114A1 (fr) 2019-09-10 2020-08-25 Machine électrique comportant des épaulements entre une pluralité de conducteurs et pattes d'une zone de logement d'enroulement d'un stator ou d'un rotor

Country Status (5)

Country Link
US (1) US20240055913A1 (fr)
EP (1) EP4029114A1 (fr)
CN (1) CN114365389B (fr)
DE (1) DE102019124226A1 (fr)
WO (1) WO2021047721A1 (fr)

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AT93548B (de) * 1922-02-14 1923-07-10 Siemens Schuckertwerke Wien Anordnung zur Kühlung der Wicklungen elektrischer Maschinen.
US4994700A (en) * 1990-02-15 1991-02-19 Sundstrand Corporation Dynamoelectric machine oil-cooled stator winding
EP1322026A1 (fr) * 2001-12-22 2003-06-25 Grundfos a/s Stator d'un moteur électrique
DE102006016249A1 (de) * 2006-03-31 2007-10-04 Robert Bosch Gmbh Stator für eine Elektromaschine und Verfahren zur Herstellung
US20080084139A1 (en) * 2006-10-04 2008-04-10 Emerson Electric Co. Motor having rotor position sensor
JP5331160B2 (ja) * 2011-05-18 2013-10-30 トヨタ自動車株式会社 回転電機のコイル固定部材、および、回転電機
JP5839851B2 (ja) * 2011-06-23 2016-01-06 日立オートモティブシステムズ株式会社 回転電機
DE102011053299A1 (de) * 2011-09-06 2013-03-07 Antriebstechnik Katt Hessen Gmbh Kühlsystem für eine hochausgenutzte hochtourige rotierende elektrische Synchronmaschine
CN104160594B (zh) * 2012-03-19 2016-09-14 三菱电机株式会社 车用旋转电机的定子及其制造方法
US10164487B2 (en) * 2013-01-28 2018-12-25 Asmo Co., Ltd. Motor, method for manufacturing magnetic plate, and method for manufacturing stator
JP5939446B2 (ja) * 2013-03-29 2016-06-22 株式会社デンソー 固定子及びその固定子を備えた回転電機並びにその固定子の製造方法
CN203774895U (zh) * 2014-01-26 2014-08-13 广东威灵电机制造有限公司 改进型电机定子结构和电机
CN108028556B (zh) * 2015-09-17 2020-02-14 日立汽车系统株式会社 旋转电机
FR3065591B1 (fr) * 2017-04-20 2021-01-01 Valeo Equip Electr Moteur Machine electrique tournante a largeur d'encoche statorique variable
CN206948051U (zh) * 2017-05-17 2018-01-30 温岭市九洲电机制造有限公司 一种电机定子的冲片结构及车辆牵引用的电机
US20180367005A1 (en) * 2017-06-14 2018-12-20 GM Global Technology Operations LLC Stator assembly with uneven conductors
DE102017220123A1 (de) * 2017-11-13 2019-05-16 Audi Ag Nutwandisolation für einen Stator eines Elektromotors
DE102018102754A1 (de) * 2018-02-07 2019-08-08 IPGATE Capital Holding AG Innenstator für eine Drehfeldmaschine (E-Motor) mit Außenrotor, mit Statorzahngruppen, welche jeweils zwei zueinander benachbarte Statorzähne aufweisen

Also Published As

Publication number Publication date
DE102019124226A1 (de) 2021-03-11
CN114365389B (zh) 2024-03-22
US20240055913A1 (en) 2024-02-15
CN114365389A (zh) 2022-04-15
WO2021047721A1 (fr) 2021-03-18

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