EP4331097A1 - Procédé de fabrication d'un électro-aimant, de préférence pour un stator d'un moteur électrique, et électro-aimant - Google Patents

Procédé de fabrication d'un électro-aimant, de préférence pour un stator d'un moteur électrique, et électro-aimant

Info

Publication number
EP4331097A1
EP4331097A1 EP22717725.0A EP22717725A EP4331097A1 EP 4331097 A1 EP4331097 A1 EP 4331097A1 EP 22717725 A EP22717725 A EP 22717725A EP 4331097 A1 EP4331097 A1 EP 4331097A1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
sheet metal
laminated cores
metal elements
laminations
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.)
Pending
Application number
EP22717725.0A
Other languages
German (de)
English (en)
Inventor
Markus Dietrich
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 EP4331097A1 publication Critical patent/EP4331097A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles
    • 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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026—Wound cores
    • 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2215/00—Specific aspects not provided for in other groups of this subclass relating to methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

Definitions

  • the invention relates to a method for producing an electromagnet, preferably for a stator of an electric motor, in which laminations comprising laminations are punched out of a plurality of laminations lying one on top of the other and shaped as teeth, with the laminations of the laminations being pressed together and then each lamination to produce a electrical's magnetic pole is surrounded by a coil winding, with adjacent laminations being wrapped in opposite directions with the coil winding and the wrapped laminations being joined together to form the electromagnet, and an electromagnet.
  • an electromagnet for use in an electric motor, it is known to stamp out stacks of laminations in the form of teeth from a plurality of stacked laminations and then to wrap a coil winding around each tooth to form an electromagnetic pole.
  • the teeth can be produced individually and positioned on a tool for wrapping with the coil winding. Care must be taken to ensure that only embossings from one strand of the sheet metal press are used for the electromagnet.
  • chains can be stamped from multiple teeth, with the teeth being fully connected across their outer radius, with the webs being built into the electric motor with the electromagnet.
  • the invention is based on the object of providing a method for producing an electromagnet and specifying an electromagnet in which assembly work on the electromagnet is also simplified when it is installed in the electric motor.
  • laminations comprising laminations are punched out of several superimposed laminations and shaped as teeth, with the laminations of the laminations being pressed together and then each laminations being surrounded by a coil winding to generate an electric magnetic pole, with adjacent laminations in opposite directions Directions are wrapped with the coil winding and the laminated cores are joined together to form the electromagnet.
  • connections between the individually wrapped laminated cores break off automatically during the assembly of the electromagnet, preferably during a rolling process.
  • an additional assembly step for separating the connections can be dispensed with.
  • connections between the individual wrapped laminated cores are interrupted after the assembly of the electromagnet. This means that the adjustment of the individual laminated cores to one another remains unaffected. In addition, a smooth contact point is created between the connections
  • a stamping tool when punching the laminated cores, a stamping tool is used which is inserted into the ones on the outside Sheet metal elements of all laminated cores creates a through hole and at the same time creates the continuous connections between the sheet metal elements stamped from the outermost sheet metal in the outermost sheet from which the uppermost sheet metal elements are produced.
  • a stamping tool is saved because the through-openings and the continuous connections are made with the same tool, which reduces the cost of manufacturing the electromagnet.
  • a further aspect of the invention relates to an electromagnet, in particular for a stator of an electric motor, comprising a plurality of poles, each consisting of a laminated core having a plurality of stacked laminated elements, which are designed as teeth and the laminated cores are each surrounded by a coil winding, wherein the coil windings of two adjacently arranged Blechpa kete are wound clockwise or counterclockwise around the respective laminated core.
  • the sheet metal elements located in the same position of all laminations arranged next to one another are connected to one another via webs which are made of the same sheet metal as the sheet metal elements located in the same position. This has the advantage that there is no need to sort the individual laminated cores when assembling the electromagnet and all the laminated cores of the electromagnet have the same height.
  • the web extends between the two adjacent stacks of laminations. As a result, only little construction space is required for the webs, which is why the size of the electromagnet remains largely unaffected.
  • each core is drawn outwardly and the ends of the webs of all cores are connected to a main web formed from the same metal sheet as the webs and the sheet members located in the same position.
  • a width of the sheet metal available for punching out the sheet metal stacks is utilized to the maximum.
  • each web is formed pointing radially outwards in a region of the respective laminated core which is unaffected by a course of field lines of a magnetic field generated by the current-carrying coil winding. As a result, the magnetic flux density remains unaffected by the web, which increases the efficiency of the electromagnet.
  • the web connects to a deepened indentation of the sheet metal elements of the laminated cores arranged in the same position, in particular in the area of a dovetail connection of the sheet metal elements of the laminated cores for coupling the laminated cores to a tool.
  • This area is irrelevant for the function of the electromagnet, since no field lines run in this area.
  • the webs are formed on the outer sheet metal elements of the laminated cores, on which a stamping tool acts to pack the sheet metal packages.
  • a stamping tool acts to pack the sheet metal packages.
  • FIG. 2 shows a basic representation of a core of the electromagnet produced by stamping and stacking
  • FIG. 3 shows a first exemplary embodiment of a core for a stator of an electric motor produced according to the method according to the invention
  • Fig. 4 shows another embodiment of the according to the invention
  • FIG. 1 is a schematic representation of an operation of an electromagnet ge shows.
  • the electromagnet 1 consists of a ferromagnetic core
  • the coil winding 3 is connected to an electrical power source 4 .
  • a current I flows through the coil winding
  • Electromagnet 1 which are used in electric motors, have a stator core 5, which is made of a plurality of superimposed sheets in a Stanzpake animal process.
  • Stamping and packaging combines the processes for stamping, forming and mechanical joining in one production material, in which the superimposed metal sheets are designed as strip material. This joining process is based on the principle of deepening and pressing the metal sheets that have been punched out on top of one another.
  • Figure 2 shows the basic process of this process.
  • the first sheet 6 of each laminated core 7 is fully punched individually and receives through openings 8, as shown in Fig. 2a.
  • the following metal sheets 9, 10, n are not fully punched through, but are given penetrations 11 which are pressed into one another, as shown in FIG. 2b.
  • radial forces arise in the penetrations 11, which cause the individual sheets 6, 9, 10, n to be held together.
  • FIG. 3 shows a first exemplary embodiment of a stator core 5 as is used in an electric motor, which is used in particular as an actuator in clutches and transmissions of a motor vehicle.
  • This stator core 5 is produced as a chain of a predetermined number of laminated cores 7 using the stamped-packaging process described.
  • Each laminated core 7, which is formed into a tooth during stamping, has a plurality of sheet metal elements 12 lying one above the other after stamping.
  • One of the outer sheet metal 6, which forms the end of the sheet metal stack 7, is machined with a stamping tool which, in addition to the through openings 8 in sheet metal elements 12 formed from the sheet metal 6 and positioned next to one another, simultaneously punches webs 13 out of the sheet metal 6, which form the sheet metal elements 12 of the Connect sheet 6 together.
  • the webs 13 are pulled outward parallel to one another and connected to one another via a flap web 14 .
  • the webs 13 are in the area of a dovetail Tail 15 held in a recessed notch 16.
  • Such a trapezoidal dovetail 15 is part of a dovetail connection, the complementary counterpart of which is formed on a tool carrier, not shown in detail, and with which the stator core 5 is fastened to the tool carrier.
  • the laminated cores 7 are surrounded by the coil winding 3, with two adjacent laminated cores 7 having coil windings that are applied in opposite directions (one winding clockwise, the other winding counterclockwise). As a result, current flows through these coil windings 3 in the opposite direction when they are connected to the power source 4 and thus form positive and negative magnetic poles.
  • the chain connected by the webs 13 is rolled from the coil winding 3 carrying laminated cores 7 to the stator. The webs 13 are then cut by means of a cutting device.
  • FIG. 17 A further exemplary embodiment of the stator core for an electric motor produced by the method according to the invention is shown in FIG.
  • the webs 17 are formed directly between the individual laminated cores 7 for connecting the sheet metal elements 12 of the outer sheet metal 6 . These webs 17 are also punched out with the same stamping tool as the through openings 8 and thus simultaneously with them. During the rolling process of the chain of laminated cores 7 held together by the webs 17, these webs 17 break off automatically.
  • the webs 13, 17 are each formed only between the sheet metal elements 12 of the outer sheet metal 6. However, there is also the possibility that these are stamped out of several of the superimposed metal sheets 9, 10, n in order to improve the handling of the electromagnet 1 during the assembly process. LIST OF REFERENCE NUMERALS 1 Electromagnet

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un électroaimant, de préférence pour un stator d'un moteur électrique, dans lequel des noyaux feuilletés (7) comprenant des éléments en tôle (12) sont découpés dans une pluralité de tôles (6, 9, 10, n) superposées les unes sur les autres et sont en forme de dents, les éléments en tôle (12) des noyaux feuilletés (7) étant pressés les uns contre les autres et chaque noyau feuilleté (7) étant ensuite entouré d'un enroulement de bobine (3) pour produire un pôle magnétique, les noyaux feuilletés (7) situés les uns à côté des autres étant enroulés en sens inverse avec l'enroulement de bobine (3) et les noyaux feuilletés (7) enroulés étant réunis pour former l'électroaimant (1). Dans un procédé qui simplifie la complexité de montage de l'électroaimant, tandis que les éléments en tôle (12) des noyaux feuilletés (7) sont découpés dans les tôles (6, 9, 10, n) superposées les unes sur les autres, des liaisons continues (13, 17) entre les éléments en tôle (12) de l'ensemble des noyaux feuilletés (7) situés au moins dans une position identique demeurent, les liaisons étant utilisées comme aides au montage lors de la construction de l'électroaimant (1), les liaisons (13, 17) étant interrompues pendant ou après la construction de l'électroaimant (1).
EP22717725.0A 2021-04-29 2022-04-06 Procédé de fabrication d'un électro-aimant, de préférence pour un stator d'un moteur électrique, et électro-aimant Pending EP4331097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021111029.7A DE102021111029A1 (de) 2021-04-29 2021-04-29 Verfahren zur Herstellung eines Elektromagneten, vorzugsweise für einen Stator eines Elektromotors, und Elektromagnet
PCT/DE2022/100259 WO2022228605A1 (fr) 2021-04-29 2022-04-06 Procédé de fabrication d'un électro-aimant, de préférence pour un stator d'un moteur électrique, et électro-aimant

Publications (1)

Publication Number Publication Date
EP4331097A1 true EP4331097A1 (fr) 2024-03-06

Family

ID=81346459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22717725.0A Pending EP4331097A1 (fr) 2021-04-29 2022-04-06 Procédé de fabrication d'un électro-aimant, de préférence pour un stator d'un moteur électrique, et électro-aimant

Country Status (5)

Country Link
US (1) US20240195273A1 (fr)
EP (1) EP4331097A1 (fr)
CN (1) CN117280580A (fr)
DE (1) DE102021111029A1 (fr)
WO (1) WO2022228605A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2888142B2 (ja) * 1993-11-08 1999-05-10 三菱電機株式会社 回転電動機並びにその製造方法
JP3180687B2 (ja) * 1996-10-16 2001-06-25 三菱電機株式会社 積層コアおよび該積層コアの製造方法
FR2812777B3 (fr) * 2000-08-02 2002-06-07 Staubli Sa Ets Procede de fabrication d'un stator cylindrique, stator obtenu par ce procede et moteur electrique equipe d'un tel stator
DE102004060078A1 (de) * 2004-12-14 2006-07-06 Continental Teves Ag & Co. Ohg Spulenträger und Verfahren zur Herstellung eines Spulenträgers
WO2011061803A1 (fr) * 2009-11-19 2011-05-26 三菱電機株式会社 Procédé de fabrication d'un stator moulé de machine électrique à dynamo

Also Published As

Publication number Publication date
CN117280580A (zh) 2023-12-22
US20240195273A1 (en) 2024-06-13
DE102021111029A1 (de) 2022-11-03
WO2022228605A1 (fr) 2022-11-03

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