WO2020193425A1 - Dispositif de positionnement destiné à des tiges de cuivre - Google Patents

Dispositif de positionnement destiné à des tiges de cuivre Download PDF

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Publication number
WO2020193425A1
WO2020193425A1 PCT/EP2020/057846 EP2020057846W WO2020193425A1 WO 2020193425 A1 WO2020193425 A1 WO 2020193425A1 EP 2020057846 W EP2020057846 W EP 2020057846W WO 2020193425 A1 WO2020193425 A1 WO 2020193425A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning device
end sections
radial
copper rods
sections
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.)
Ceased
Application number
PCT/EP2020/057846
Other languages
German (de)
English (en)
Inventor
Dennis Pietsch
Hergen JANSSEN
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.)
ThyssenKrupp AG
ThyssenKrupp System Engineering GmbH
Original Assignee
ThyssenKrupp AG
ThyssenKrupp System Engineering 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 ThyssenKrupp AG, ThyssenKrupp System Engineering GmbH filed Critical ThyssenKrupp AG
Publication of WO2020193425A1 publication Critical patent/WO2020193425A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/30—Manufacture of winding connections
    • H02K15/33—Connecting winding sections; Forming leads; Connecting leads to terminals
    • H02K15/35—Form-wound windings
    • H02K15/36—Processes or apparatus for simultaneously twisting two or more open ends of hairpins after their insertion into the machine

Definitions

  • the invention relates to a positioning device for circumferential and radial positioning around a central axis M of a plurality of end sections of copper rods, the copper rods being essentially U-shaped with a first leg section, a second leg section and a transverse section connecting both leg sections and the two leg sections with the end sections.
  • stator elements and rotor elements manufactured using winding technology or manufactured using hair-pin technology offer the possibility of increasing the power density of electric motors that are to be used in motor vehicles.
  • specially bent copper rods which are also referred to as hair pins because of their shape, are inserted into axially extending and internally or externally arranged receiving grooves of the stator element or rotor element.
  • a copper rod in the sense of this description is preferably bent in a U-shape so that it has two essentially parallel leg sections that are connected to one another by a transverse section. The length of this transverse section determines the so-called span of the copper rod, which accordingly indicates the distance between the two Schenkelab sections to each other.
  • the two leg sections are inserted into the receiving grooves of the stator element or rotor element when the Kup is installed.
  • the described bend or shape of the copper rod requires that, viewed in an axial view, the two leg sections sit parallel to the central axis M in the receiving grooves, but on two different diameters based on the central axis M. These two different diameters on which copper rods in the Grooves of the stator element or rotor element are inserted, are referred to as so-called "level".
  • a pre-positioning in which the first thing to do is to arrange the individual copper rods both relative to one another and as a whole circumferentially. Here, after pre-positioning, the copper rods do not yet have an overlapping position to one another, which they must later have in the stator element or rotor element; 2. Positioning by means of a positioning device to which the copper rods are passed in the pre-posited arrangement and via which the copper rods are brought into the overlapping position and
  • the respective transverse sections of the copper rods protrude on one side from the stator element or rotor element and the free end sections protrude from the stator element or rotor element on the other side.
  • the free end sections of different copper rods it is necessary to connect the free end sections of different copper rods to each other in a suitable manner in pairs so that the total unity of each other connected copper bars result in one or more continuous, winding-like wire courses in the stator element or rotor element.
  • a “level” is created by connecting the free end sections of the copper rods on the outer diameter with the free end sections of the copper rods on the second, inner diameter.
  • the copper rods are consequently placed on a third and a fourth diameter.
  • the levels are usually arranged concentrically to one another with a certain radial spacing.
  • the free end sections of the copper sections are usually connected by a joining process, for example soldering or welding, in particular laser welding.
  • a joining process for example soldering or welding, in particular laser welding.
  • the end sections In order to join the end sections together, it is necessary for the end sections to be connected in pairs to be arranged as gap-free as possible.
  • Positioning devices are known for this, such as one described in EP 2 684 283 A1.
  • the force is exerted on the end sections to be joined both in the straight end and in the inclined area in front of it, which was caused by the previously performed bending process.
  • the action of force in the inclined area is undesirable, since this can damage the insulating varnish applied in the inclined area.
  • the object of the present invention is to provide a device by which a force can be applied to the end regions of the copper rods without the risk of damaging the insulation.
  • the object is achieved by a positioning device for the circumferential and radial positioning of a plurality of end sections of copper rods in a stator element or rotor element around a central axis M of the stator element or rotor element, the copper rods being essentially U-shaped with a first leg section and a second leg section and a transverse section connecting the two leg sections are formed and the two leg sections end with the end sections, with a plurality of alignment slide elements and a plurality of radial tensioning elements, the end sections each pairwise being positionable over the alignment slide element circumferentially relative to the central axis M and via the radial tensioning element can be positioned radially in relation to the central axis M.
  • all end sections of the copper rods are actively and simultaneously brought into their intended position and held in this position. This ensures that the end sections are pressed together on a respective surface contact without a clear gap, so that during laser welding the risk of the laser beam "shooting through” between the two end sections of a pair is effectively reduced or even avoided. A “shoot through” can result in irreparable damage to the component.
  • the surface contact between the end areas clearly promotes a uniform heat distribution, so that no local hot spots can arise. It is preferably provided here that both the alignment slide elements and the radial clamping elements are arranged in an annular manner and are evenly distributed around the central axis M.
  • the configuration according to the invention is made such that the pusher elements are indirectly supported in the circumferential direction via the end sections of the copper rods located between them and thus stabilize.
  • An advantageous embodiment of the invention provides that a plurality of transmission elements are provided which can be positioned along a radial direction with respect to the central axis M between two end sections arranged in pairs in order to establish a kinematic active connection in the radial direction between the two end sections arranged in pairs deliver.
  • This configuration is advantageous when the copper bars are arranged in the stator element or rotor element in a first level and a second level.
  • the arrangement here is such that the end regions of the copper rods of the first level arranged in pairs are offset radially from the end regions of the copper rods of the second level arranged in pairs, so that the plurality of transmission elements bridge the radial distance between the two levels, so that the end cuts of the copper rods are sufficient be applied to the radially outer level with the radial clamping elements and also indirectly to press the end sections of the copper rods of the radially inner level into position.
  • An advantageous embodiment of the invention provides that the transmission elements are movable between a raised position in the direction of the central axis M and a lowered position, the transmission elements in the lowered position floating in the radial direction between the two end sections arranged in pairs.
  • the transmission elements are primarily only passive elements.
  • the floating arrangement also ensures that the transmission elements find their way cleanly into the radial gap between the end sections of the copper rods of the two levels when they are lowered from the raised position to the lowered position.
  • An advantageous embodiment of the invention provides that an inner radial stop is provided as a counter bearing for the loading introduced by the radial clamping element.
  • the stop or the counter-bearing ensures that the end regions of the copper rods do not bend while being pressed.
  • An advantageous embodiment of the invention provides that a protective cover is provided for at least predominantly covering the positioning device. This protects the components themselves and the parts of the positioning unit from contamination, for example weld spatter from laser welding.
  • the protective cover expediently has openings arranged around the edge for the end section of the leg section to pass through.
  • Figure la a representation of a single copper rod
  • FIG. 2 a positioning device according to the invention in a plan view
  • FIG. 3 a detailing of a positioning device
  • Figures 4a) to 4d) and Figure 5 shows a sequence of a clamping process of the end sections with a positioning device
  • FIG. 6 shows a further detailing of a positioning device.
  • FIG. 1 a initially shows a single copper rod 2 which is essentially U-shaped with a first leg section 4i, a second leg section 4 2 and a transverse section 8 connecting the two legs 4i, 4 2 .
  • the end of each leg section 4i, 4 2 presented below Darge can be referred to as the end section 6i, 6 2 , the In contrast to the rest of the leg section 4i, 4 2 which continues upwards, there is no insulation, for example by an insulation varnish, of the copper material.
  • the figure lb) shows a stator element or rotor element 1, which is circumferentially equipped with a plurality of copper rods 2, which sit in not shown grooves of the stator element or Ro torelement 2.
  • the copper bars 2 are seated in the stator element or rotor element 1 in such a way that they protrude beyond the respective end face on one axial side with the transverse sections 8 and on the other axial side with the end sections 6i, 6 2 .
  • M a central axis is designated, which is to be equated with the axis of rotation in later operation of the stator element or rotor element 1.
  • FIG. 2 shows a positioning device 10 according to the invention, in which a stator element or rotor element 1 equipped with copper rods 2 is received, which can be seen inside the device.
  • the stator element or rotor element 1 is arranged with respect to the positioning device 10 in such a way that the end sections 6i, 6 2 of the copper rods 2 protrude from the stator element or rotor element 1 are received by the positioning device.
  • the stator element or rotor element 1 comprises two levels, so that the end sections 6i, 6 2 of the copper rods 2 are arranged in two concentric circles which are at a certain radial distance.
  • the end sections 6i, 6 2 of the copper rods 2 of a level are circumferentially distributed in pairs, each pair of end sections 6i, 6 2 being welded to one another in a subsequent work step.
  • the end sections 6i, 6 2 of each pair are largely, preferably completely, approached to each other via the positioning device 10, in order to experience a defined final positioning on the one hand and the risk of bullet penetration between the end sections 6i, 6 2 during avoid welding at least as far as possible.
  • FIG. 3 shows a detailing of a positioning device 10, namely a circumferential section of the elements via which the end sections 6i, 6 2 of the copper rods 2 are received and acted upon.
  • the end sections 6i, 6 2 of the copper rods 2 are not shown in FIG.
  • a positioning device 10 initially comprises a plurality of alignment slide elements 12i, 12 2 . . .12 n and a plurality of radial clamping elements 14i,
  • Both the alignment slide elements 12i, 12 2 . . .12 n as well as the radial clamping elements 14i, 14 2 . . .14 n are delivered from the radial outside to the radial inside, in which case appropriate drive means can be provided for this purpose, but these are not explicitly described.
  • the end sections 6i, 6 2 on the inner circle are in receiving pockets 16i, 16 2 . . .16 n arranged and the end sections 6i, 6 2 on the outer circle in receiving pockets 18i, 18 2 . . .18 n arranged.
  • Between the two circularly arranged end portions 6i, 6 2 are a plurality of transmission elements 20i, 20. 2 .
  • annular radial stop 22 is provided within the inner end sections 6i, 6 2 , as a counter bearing for the radial clamping element 14i,
  • FIGS. 4a) to 4d) shows the clamping process of the end sections 6i, 6 2 of the copper rods 2 with the positioning device 10 before the corresponding end sections 6i, 6 2 are welded together in pairs.
  • FIG. 4a) shows how the positioning device 10 is placed on the stator element or rotor element 1 and the alignment slide elements 12i, 12 2 . . .12 n , the radial clamping elements 14i, 14 2 . . .14 n and the transmission elements 20i, 20 2 . . .20 n are in their respective undelivered position.
  • the Ra dial stop 22 is not yet mounted in the present case.
  • the transmission elements 20i With regard to the transmission elements 20i,
  • 20 2 . . .20 n can also be referred to as a raised position.
  • FIG. 4b shows the state in which the alignment slide elements 12i, 12 2 . . .12 n were delivered radially inward and in the circumferential interspaces of the end sections 6i, 6 2 of the copper rods 2 they each contact and hit in a defined circumferential position.
  • the radial stop 22 was additionally mounted or positioned centrally within the inner end sections 6i, 6 2 of the copper rods 2.
  • the stator element or rotor element 1 is covered and not visible.
  • the inner end portions 6i, 6 2 of the copper rods 2 are supported by the radial stop 22 when it is acted upon, as will be described below.
  • the transmission elements 20i the transmission elements 20i
  • FIG. 5 shows the state in which the radial clamping elements 14 14 2 . . .14 n were delivered radially inward and the outer end sections 6i, 6 2 of the copper rods are acted upon radially inward.
  • This radially inwardly directed impact is transmitted via the interposed transmission elements 20i, 20 2 . . .20 n onto the inner end sections 6i, 6 2 of the copper rods, whereby these find their hold on the radial stop 22.
  • the radial position of the radial stop 22 defines a reference inner diameter for the end sections 6 i, 6 2 of the copper rods 2.
  • FIG. 6 shows a protective cover 24 which, after tensioning the end sections 6i, 6 2 of the copper rods 2, is positioned to cover the positioning device 10 and its elements. The welding process can then be carried out so that weld spatter and other impurities cannot get into the interior of the positioning device 10.
  • the protective cover 24 has openings 26 for the end sections 6i, 6 2 to pass through.

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

Abstract

L'invention concerne un dispositif de positionnement servant au positionnement périphérique et radial d'une pluralité de sections d'extrémité de tiges de cuivre autour d'un axe central M, les tiges de cuivre étant formées sensiblement en forme de U et comportant une première section de branche, une seconde section de branche et une section transversale reliant les deux sections de branche, et les deux sections de branche se terminant par les sections d'extrémité.
PCT/EP2020/057846 2019-03-25 2020-03-20 Dispositif de positionnement destiné à des tiges de cuivre Ceased WO2020193425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019204083.7 2019-03-25
DE102019204083.7A DE102019204083A1 (de) 2019-03-25 2019-03-25 Positioniervorrichtung für Kupferstäbe

Publications (1)

Publication Number Publication Date
WO2020193425A1 true WO2020193425A1 (fr) 2020-10-01

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PCT/EP2020/057846 Ceased WO2020193425A1 (fr) 2019-03-25 2020-03-20 Dispositif de positionnement destiné à des tiges de cuivre

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DE (1) DE102019204083A1 (fr)
WO (1) WO2020193425A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041696A1 (fr) * 1999-03-30 2000-10-04 Denso Corporation Méthode pour la fabrication des enroulements statoriques d'une machine électrique
EP1043828A2 (fr) * 1999-03-30 2000-10-11 Denso Corporation Méthode de soudage d'un pluralité d' enroulements d'une machine électrique tournante
FR2845536A1 (fr) * 2002-10-07 2004-04-09 Valeo Equip Electr Moteur Agencement de soudage des extremites libres de paires de segments de conducteurs electriques d'un bobinage d'une machine electrique tournante
US6990724B2 (en) 2002-01-21 2006-01-31 Mitsubishi Denki Kabushiki Kaisha Dynamoelectric machine winding joining method
EP2684283A1 (fr) 2011-03-07 2014-01-15 ATOP S.p.A. Appareil et procédé servant à aligner les conducteurs d'éléments de bobine dans les noyaux de machines dynamiques électriques avant les opérations de soudure
WO2018185620A1 (fr) * 2017-04-03 2018-10-11 Atop Spa Appareil pour aligner des fils conducteurs s'étendant à partir d'éléments bobines insérés dans des fentes d'une partie centrale d'une machine dynamo-électrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041696A1 (fr) * 1999-03-30 2000-10-04 Denso Corporation Méthode pour la fabrication des enroulements statoriques d'une machine électrique
EP1043828A2 (fr) * 1999-03-30 2000-10-11 Denso Corporation Méthode de soudage d'un pluralité d' enroulements d'une machine électrique tournante
US6990724B2 (en) 2002-01-21 2006-01-31 Mitsubishi Denki Kabushiki Kaisha Dynamoelectric machine winding joining method
FR2845536A1 (fr) * 2002-10-07 2004-04-09 Valeo Equip Electr Moteur Agencement de soudage des extremites libres de paires de segments de conducteurs electriques d'un bobinage d'une machine electrique tournante
EP2684283A1 (fr) 2011-03-07 2014-01-15 ATOP S.p.A. Appareil et procédé servant à aligner les conducteurs d'éléments de bobine dans les noyaux de machines dynamiques électriques avant les opérations de soudure
WO2018185620A1 (fr) * 2017-04-03 2018-10-11 Atop Spa Appareil pour aligner des fils conducteurs s'étendant à partir d'éléments bobines insérés dans des fentes d'une partie centrale d'une machine dynamo-électrique

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