EP3130057A1 - Module comprenant un noyau feuilleté pour une machine électrique, procédé de fabrication d'un tel module et machine électrique - Google Patents

Module comprenant un noyau feuilleté pour une machine électrique, procédé de fabrication d'un tel module et machine électrique

Info

Publication number
EP3130057A1
EP3130057A1 EP15710749.1A EP15710749A EP3130057A1 EP 3130057 A1 EP3130057 A1 EP 3130057A1 EP 15710749 A EP15710749 A EP 15710749A EP 3130057 A1 EP3130057 A1 EP 3130057A1
Authority
EP
European Patent Office
Prior art keywords
laminated core
support element
stator
assembly according
support member
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Withdrawn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
EP15710749.1A
Other languages
German (de)
English (en)
Inventor
Bernhard BYZIO
Walter Wolf
Erhard WEHNER
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.)
ZF Friedrichshafen AG
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 EP3130057A1 publication Critical patent/EP3130057A1/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Withdrawn legal-status Critical Current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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • 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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/09—Magnetic cores comprising laminations characterised by being fastened by caulking

Definitions

  • the present invention relates to a structural unit with a laminated laminated core for an electric machine according to the preamble of claim 1, to a method for producing such a structural unit and to an electrical machine with such a structural unit.
  • the electromagnetic components of electrical machines often include laminated cores of magnetizable electrical steel.
  • laminated cores are constructed from a plurality of axially staggered laminations, which are interconnected, for example, either with a baked enamel or interlocking punching package cam.
  • the laminated core can act both as a rotor or stator lamination, what this is rotatably arranged, for example by means of a press fit on a cylindrical rotor or stator.
  • the pass ratios may change under the influence of a temperature change, with the result that, in particular, the frontal areas of a laminated core fan out axially and individual blades protrude from the laminated core. This adversely affects the efficiency of such an electric machine.
  • the laminated stator core is set on the inner peripheral surface of a housing of the machine.
  • An axial stop of the laminated core is formed by a diameter step of the housing, while the other axial side of the laminated core is formed by a collar of a releasably arranged on the housing end shield. In this way, the laminations of the laminated core are permanently clamped axially and prevented from fanning.
  • JP 2006 25 465 A1 became known assembly for an electric machine, wherein a stop screwed by a bolted to the machine housing Ring element is formed, which compresses the laminated core axially in the direction of another housing stop.
  • the present invention is based on the background described the task to present a structural unit for an electrical machine of the type described, in which the laminated core is permanently fixed to the support member axially and in which a fanning of individual slats is reliably prevented.
  • a structural unit for an electric machine in which one of the axial stops for fixing the laminated core comprises an annular support member which is arranged together with the laminated core on the receiving portion of the support member and against this, the laminated core supported.
  • the support element is fixed by means of at least one Verstemm Kunststoffs on the support element.
  • the laminated core can be designed both as a rotor and / or as a laminated stator core, the laminations of which are preferably connected to one another by a stamped package or by the action of a baked enamel.
  • the laminated core may consist of circumferentially closed individual annular lamination with a yoke and a toothed winding area. This winding region comprises teeth and grooves arranged between them, in which a stator winding can be inserted.
  • the laminated core can also be segmented in the circumferential direction, wherein the assembly of such segments, an annular laminated core is formed.
  • the laminated core can also run without a winding and possibly also have a receiving area for permanent magnets.
  • the invention is independent of the specific design and the respective operating principle on all electrical machines with a laminated laminated core realized.
  • the support member is preferably formed as a support ring or as a circular support disk and preferably made of steel, wherein the thickness is greater than a lamella thickness and preferably 2-5 lamella thickness.
  • the support member may preferably closed circumferentially, but alternatively also segmented, that is, be designed in several parts.
  • the laminated core is rotatably arranged with its cylindrical mounting portion on a likewise cylindrical receiving portion of the support member, for which purpose preferably a press fit of the parts is realized.
  • This can be done either by means of a longitudinal compression bandage by axial press joining, by means of a cross-press dressing by shrinking or by a mixed form of the aforementioned press dressings by the two connection partners are heated to different temperatures before joining.
  • the laminated core is pushed axially onto the support member until it comes to a first stop to the plant.
  • the interference fit in particular a transverse compression bandage is produced after assembly by the self-adjusting temperature compensation.
  • the support member serves for axial securing of the laminated core and is also received during assembly of the unit from the receiving area of the support member and preferably directly, but at least indirectly brought to the free end face of the laminated core in this system.
  • a clamping region or a plurality of clamping regions distributed on the circumference of the support element is produced, in which the base material of the carrier element and / or the support element is plastically displaced and whereby a certain radial overlap of carrier element and support element is achieved.
  • the support ring takes on the caulking otherwise acting directly on the laminated core radial forces and thus prevents emigration and misalignment of the located there End lamellae of the laminated core. In this way, the laminated core and its support member are permanently and reliably secured to each other, at the same time a fanning of the laminated core is avoided.
  • the laminated core is already axially biased by means of an assembly aid mounted on the support element, this mounting aid is removed only after the generation of Verstemm Symposiume.
  • the Verstemm Anlagene can be performed directly on the carrier element, for which purpose this can preferably be made of a plastically comparatively easily deformable material, for example an aluminum material.
  • the carrier element can be present for example as an aluminum stator or rotor carrier.
  • the stator carrier can simultaneously be embodied as the housing of the machine.
  • the stator lamination stack may e.g. be fixed to an aluminum gear housing.
  • the carrier element has a different thermal expansion coefficient relative to the laminated core, in particular a coefficient of expansion differing by about a factor of 2, which leads to a variation of the fitting force as a function of the temperature.
  • the support element may in this case be made of a steel material.
  • this can be formed at the designated position with an advantageous for attacking a caulking contour and also with a weakened to facilitate the plastic deformation relative to a base material portion.
  • a section can be formed, for example, by a collar protruding axially beyond the laminated core with a comparatively small wall thickness, which can be permanently deformed by caulking at least in sections radially in the direction of the laminated core.
  • a suitably designed pressing or caulking tool can be used to achieve a high surface pressure, at least at the beginning of the conversion. molding process are brought into a linear or punctiform contact with the carrier or the support element.
  • the support element can preferably be made of a plastically comparatively easily deformable material, for example an aluminum material.
  • An advantageous contour can also be formed on the support element for caulking, wherein during caulking a deformable section is plastically deformed by material displacement into a receiving contour of the support element and is axially supported there.
  • the laminated core is fixed with a yoke portion on the receiving portion of the support member, wherein the yoke portion of the support member is at least partially radially overlapped.
  • a stator winding is already arranged on a toothed area of the laminated core, so that only a radially narrow engagement space is accessible for engagement of a caulking or pressing tool.
  • the caulking region can be executed in the circumferential direction of the carrier element as a single caulking region over the entire circumference or over a partial region and also in one process step or in a plurality of process steps.
  • a plurality of caulking areas may be performed in the circumferential direction of the laminated core. The division of the circumferential area into a plurality of caulking areas reduces the area to be deformed during a process step and thus increases the surface pressure at a caulking area given a fixed force introduced by a caulking tool.
  • the surface pressure can be increased still further by sequentially dividing a total number of caulking areas to be introduced into at least two or more caulking operations or process steps, between which the laminated core and its carrier are circumferentially changed relative to the caulking tool a certain angle is twisted.
  • the caulking areas are generated in groups.
  • one of the two axial stops for the laminated core can be formed integrally with the carrier element, in particular by an annular shoulder on the receiving region of the carrier element.
  • a stop can also be provided by an attachment element fixedly connected to the carrier element.
  • the laminated core comprising a arranged on the attachment portion, in particular metallic sleeve member and be arranged together with the sleeve member on the receiving portion of the support member.
  • a method for producing a structural unit for an electrical machine comprises the following steps:
  • annular lamination stack of a plurality of laminations which is optionally composed of a plurality of circumferential segments
  • FIG. 1 shows a stator assembly of an electrical machine with a laminated core, which is fixed together with a support element by means of a running on a support member Verstemm Kunststoffs (radial retaining projection) thereto,
  • FIG. 2 shows a stator assembly according to FIG. 1, wherein a caulking tool with a linear or punctiform contact contour is used, FIG.
  • FIG. 3 a stator assembly according to FIG. 1, wherein a caulking region is formed on a collar extending axially over the laminated core, FIG.
  • FIG. 4 shows a stator assembly of an electrical machine with a laminated core, which is fixed to a support element together with a support element by means of a caulking region embodied thereon,
  • FIG. 5 shows a stator assembly according to FIG. 1, wherein a sleeve-shaped intermediate element is arranged in a mutual peripheral contact region of laminated core and carrier element,
  • Fig. 6 is an end view of a stator assembly of a plurality of circumferentially executed Verstemm Kunststoffe with which a laminated core is fixed to a stator.
  • This assembly 12 comprises an annular laminated core 1 6, which is composed of a plurality of circumferentially joined stator segments, which are not visible in the views shown.
  • Each stator segment is formed from a plurality of axially stacked laminations 17.
  • Each of the stator segments comprises a yoke region 16a and a tooth 16b projecting radially therefrom, which carries a stator coil 20 supported on the end side by winding bodies 18a, b.
  • the individual yoke regions of the segments form in this way an annularly closed yoke 16a of the laminated core 16.
  • the assembled into a ring laminated core 1 6 is by means of a press fit with an outer cylindrical attachment portion 1 6c, in particular with the outer cylindrical surface 1 6c on a radially inner cylindrical receiving portion 22a, in particular the inner cylindrical surface 22a of a here designed as a stator 22 support member 22 set.
  • the housing 22 is made of an aluminum material
  • the laminated core 1 6 is formed of an electrical steel, so an iron material.
  • the support member 22 has so compared to the laminated core 1 6 a different, in this case a larger thermal expansion coefficient.
  • the support member 22 has a first stopper 22b and a second stopper 22c, between which the laminated core 1 6 is fixed axially frictionally clamped.
  • the first stop 22a for the laminated core 16 is in this case formed integrally with the carrier element 22, in this case in particular by an annular shoulder 22b on the receiving region 22a of the carrier element 22.
  • the second stop 22c comprises an annular support element 24, which is arranged on the receiving portion 22a and the laminated core 1 6 is supported and which is fixed by means of at least one caulking 26 on the support member 22.
  • the laminated core 1 6 is thus with the yoke portion 16 a at the receiving Ab- Section 22a of the support member 22 is fixed, wherein the yoke portion 1 6a is at least partially radially covered by the support member 24.
  • the Verstemm Scheme 26 is carried out on the support member 22 itself by a on the receiving portion 22a axially over the laminated core 1 6 projecting portion 22d by an axially acting, here by a punch schematically illustrated pressing tool 28 is plastically deformed.
  • a punch schematically illustrated pressing tool 28 is plastically deformed.
  • at least one radial covering section 22e of the carrier element 22 or a radial holding projection 22e is generated.
  • a plurality of such overlapping portion 22e are generated, which act axially on the support member 24 and the laminated core 1 6 axially frictionally between the stops 22c, 22d clamp.
  • FIG. 2 shows a stator assembly 12 according to FIG. 1, with a caulking tool 28 having a line-shaped or punctiform contact contour being used to increase the surface pressure at the beginning of the forming process.
  • FIG. 3 shows a further stator assembly 12 according to FIG. 1, wherein, however, a caulking region 26 is formed on a collar 22f of the carrier element 22 which extends axially over the laminated core 16 and has a comparatively thin-walled collar.
  • a cutting or wedge-shaped pressing tool 28 with a flank inclined toward the direction of action is used.
  • the caulking region 26 is formed directly on the support element 24.
  • the support element 24 is designed annular and has in the axial direction an abutment portion 24a for abutment against the laminated core 16 and a deformable abutment portion 24b for axial support on an engagement contour 22g of the support member 22.
  • the contact portion 24b is plastic after insertion of the support member 24 on the support member 22 by a drawing not shown here and axially engaging wedge-shaped pressing tool into the engagement contour 22g deformed. 4 shows the support element 24 in the undeformed state and in the inserted and deformed state.
  • FIG. 5 shows a stator assembly 12 according to FIG. 1, wherein a sleeve-shaped intermediate element 30 or a sleeve element 30 is arranged in a mutual peripheral contact region of laminated core 16 and carrier element 22.
  • This intermediate element 30 can be used, for example, as a remaining mounting aid.
  • FIG. 6 shows an end view of a stator assembly 12 according to FIG. 1, wherein the laminated core 16 is fixed to the stator carrier 22 by means of a plurality of clamping regions 26 which are embodied on the circumference.
  • stator assemblies 12 explained with reference to FIGS. 1 to 6 can be represented by a production method comprising the following steps:
  • a corresponding ferrule can be used, the axial bearing areas act on the end faces of the laminated core and through which the laminated core is compressed axially and held together. It should only be noted that the attachment portion 1 6c, that in this case the outer cylinder surface of the laminated core 1 6 remains free for mounting on the carrier 22 and is not covered or otherwise encompassed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention porte sur un module (12) pour une machine électrique (10) pourvue d'un noyau feuilleté annulaire (16) qui est formé d'une pluralité de lamelles de tôles empilées axialement (17), le noyau feuilleté (16) étant fixé au moyen de segments de fixation cylindriques intérieur ou extérieur (16c) à un segment de réception cylindrique (22a) d'un élément porteur (22) et l'élément porteur (22) présentant deux butées (22b, 22c) entre lesquelles le noyau feuilleté (16) est serré axialement par action de force. Selon l'invention, au moins une des butées (22c) comprend un élément d'appui annulaire (24) qui est disposé contre le segment de réception (22a) et qui donne appui au noyau feuilleté (16) et est fixé à l'élément porteur (22) au moyen d'au moins une zone rabattue (26).
EP15710749.1A 2014-04-09 2015-03-12 Module comprenant un noyau feuilleté pour une machine électrique, procédé de fabrication d'un tel module et machine électrique Withdrawn EP3130057A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014206848.7A DE102014206848A1 (de) 2014-04-09 2014-04-09 Baueinheit mit einem lamellierten Blechpaket für eine elektrische Maschine, Verfahren zur Herstellung einer solchen Baueinheit und elektrische Maschine
PCT/EP2015/055124 WO2015154938A1 (fr) 2014-04-09 2015-03-12 Module comprenant un noyau feuilleté pour une machine électrique, procédé de fabrication d'un tel module et machine électrique

Publications (1)

Publication Number Publication Date
EP3130057A1 true EP3130057A1 (fr) 2017-02-15

Family

ID=52692616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15710749.1A Withdrawn EP3130057A1 (fr) 2014-04-09 2015-03-12 Module comprenant un noyau feuilleté pour une machine électrique, procédé de fabrication d'un tel module et machine électrique

Country Status (6)

Country Link
US (1) US10536043B2 (fr)
EP (1) EP3130057A1 (fr)
JP (1) JP2017511105A (fr)
CN (1) CN106165253B (fr)
DE (1) DE102014206848A1 (fr)
WO (1) WO2015154938A1 (fr)

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DE102018120235A1 (de) * 2018-08-20 2020-02-20 Schaeffler Technologies AG & Co. KG Kompakte Fertigungsstation zum Zusammenfügen eines Stators für einen Elektromotor aus Statorsegmenten
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DE102020207236A1 (de) * 2020-06-10 2021-12-16 Zf Friedrichshafen Ag Statoranordnung einer elektrische Maschine und elektrische Maschine zum Antreiben eines Kraftfahrzeugs
EP3972098B1 (fr) * 2020-09-17 2023-07-26 Valeo eAutomotive Germany GmbH Agencement pour une machine électrique doté d'un remplissage de résine amélioré pour enroulements de stator
CN113991947B (zh) * 2021-12-27 2022-03-08 天津飞旋科技股份有限公司 定位工装及转子叠片装配方法

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Also Published As

Publication number Publication date
US20170040852A1 (en) 2017-02-09
WO2015154938A1 (fr) 2015-10-15
CN106165253A (zh) 2016-11-23
DE102014206848A1 (de) 2015-10-15
JP2017511105A (ja) 2017-04-13
CN106165253B (zh) 2019-07-30
US10536043B2 (en) 2020-01-14

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