EP4248554A1 - Dispositif pour positionner des éléments d'enroulement - Google Patents

Dispositif pour positionner des éléments d'enroulement

Info

Publication number
EP4248554A1
EP4248554A1 EP21816393.9A EP21816393A EP4248554A1 EP 4248554 A1 EP4248554 A1 EP 4248554A1 EP 21816393 A EP21816393 A EP 21816393A EP 4248554 A1 EP4248554 A1 EP 4248554A1
Authority
EP
European Patent Office
Prior art keywords
straightening
tool
fixing
winding
axis
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
EP21816393.9A
Other languages
German (de)
English (en)
Inventor
Andreas SCHIFFLHUBER
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.)
Miba Automation Systems GmbH
Miba Automation Systems GmbH
Original Assignee
Miba Automation Systems GmbH
Miba Automation Systems 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 Miba Automation Systems GmbH, Miba Automation Systems GmbH filed Critical Miba Automation Systems GmbH
Publication of EP4248554A1 publication Critical patent/EP4248554A1/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
    • H02K15/0056—Manufacturing winding connections
    • H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
    • H02K15/0081—Connecting winding sections; Forming leads; Connecting leads to terminals for form-wound windings

Definitions

  • the invention relates to a device and a method for positioning winding elements, in particular the ends of winding elements, of an electrodynamic machine, in particular a stator of an electrical machine, with a plurality of straightening tools and a first drive in order to position the plurality of straightening tools in the direction of a first axis. and wherein the straightening tools have suitable recesses on their side surfaces.
  • DE 102018 107 598 A1 discloses a method and a device for joining coil elements in an arrangement for a coil of an electrodynamic machine.
  • the conductor ends are prepared for joining by a clamping device.
  • the tensioning device interacts with a perforated disc, which together ensures the desired positioning of the conductor ends.
  • a device for positioning a conductor end is known from the publication DE 102018 108615 A1.
  • an elongate finger element is proposed that can be inserted between the conductor ends and grasps and positions the conductor ends. These finger elements are moved and rotated axially in order to grasp the conductor ends in suitable recesses. This construction proves to be very expensive in practice.
  • DE 102018202 381 A1 discloses a device and a method for aligning the contact ends of hairpins. Guide devices are used in several levels, which move and fix the contact ends of the hairpins in a suitable position for the final joining. Here, too, a very complex design of a positioning device is chosen.
  • One of the objects of the present invention is to develop a method for positioning winding elements of an electrodynamic machine and a corresponding device that solve the problems known from the prior art.
  • the object according to the invention is achieved by a method according to claim 1.
  • the invention is characterized by a method for positioning the ends of winding elements of an electrical machine, that a device with a plurality of straightening tools and a first drive in order to position the straightening tools in the direction of a first axis, the straightening tools having recesses on their side surfaces and every two adjacent straightening tools form a fixing tool.
  • the straightening tools of the respective fixing tool have their recesses on mutually oriented side surfaces, so that at least one of the winding elements can be fixed by fitting and/or clamping between the straightening tools of the fixing tool.
  • a second drive is provided, through which both straightening tools can be moved in the direction of a second axis, which is not parallel to the first axis, so that the distance between the two straightening tools of the respective fixing tool can be changed in the direction of the second axis and each of the two Straightening tools can be delivered laterally to the winding element.
  • the straightening tools can be radially advanced onto the winding elements distributed over a predetermined, in particular ring-shaped, circumference and the recesses in the straightening tools form receiving pockets for at least one of the winding elements.
  • the fixing tool forms a fixing chamber for fixing the winding element in the direction of the first and second axis by advancing the two straightening tools of the fixing tool in the direction of the first and second axis with two opposite receiving pockets of the straightening tools of the fixing tool.
  • the first straightening tool of the fixing tool is moved in a first step in the direction of the second axis away from the second straightening tool of the fixing tool, so that a first winding element, possibly located in a first fixing chamber of the first and second straightening tool, can be pulled out of the first fixing pocket of the first straightening tool is released.
  • the first straightening tool is advanced in the direction of the first axis, and in a third step, it is moved in the direction of the second axis in the direction of the second straightening tool such that a second winding element, positioned at a distance from the first winding element, in the first fixing pocket of the first straightening tool and the first winding element is received in a second fixing pocket of the first straightening tool, the second fixing pocket of the first straightening tool and the first fixing pocket of the second straightening tool forming a second fixing chamber.
  • the first axis is aligned essentially radially, so that the ends of the radially arranged winding elements are easily accessible.
  • deviations from an exact radial alignment preferably up to + ⁇ 45°, particularly preferably up to + ⁇ 25°, are possible as long as they make sense from a functional point of view.
  • the ends of the winding elements are therefore gripped radially from the outside in by the fixing tool.
  • the second straightening tool of the fixing unit is moved away from the first straightening tool in a first step in the direction of the second axis, so that a first winding element located in the second fixing chamber of the first and second straightening tools the first fixing pocket of the second straightening tool is released.
  • the second straightening tool is moved forward in the direction of the first axis and in a third step in the direction of the second axis in the direction of the first straightening tool such that the second winding element, opposite the first winding element, moves in the direction of the first axis Straightening tool, upstream positioned winding element, is accommodated in the first fixing pocket of the second straightening tool and thereby forms a third fixing chamber with the first fixing pocket of the first straightening tool for the second winding element and the first winding element is accommodated in a second fixing pocket of the second straightening tool, with the second fixing pocket of the first straightening tool and the second fixing pocket of the second straightening tool form a third fixing chamber.
  • the first and second drives are designed as a combined drive.
  • the invention is characterized by a method for producing a stator of an electrical machine with a winding basket with several layers of conductor bar ends.
  • a twisting tool is provided for twisting the ends of the conductor bars and the twisting tool twists radially inward, starting from the outermost layer, layer by layer of the ends of the conductor bars.
  • Straightening tools are provided which, after twisting, position the twisted conductor bar ends using the method according to claims 1 to 3.
  • the multiple layers of conductor bar ends have a first outer layer of conductor bar ends and a second inner layer of conductor bar ends closest to the first layer.
  • the straightening tools grip the twisted conductor bar ends of the first layer before the twisting of the second layer of conductor bar ends is started by the twisting tool.
  • the multiple layers of conductor bar ends have a first outer layer of conductor bar ends and a second inner layer of conductor bar ends closest to the first layer. The straightening tools grip the twisted conductor bar ends of the first layer before the twisting of the second layer of conductor bar ends is completed by the twisting tool.
  • the several layers of conductor bar ends have a first outer layer of conductor bar ends and a second layer of conductor bar ends lying on the inside next to the first layer and a third layer of conductor bar ends lying on the inside of the second layer.
  • the straightening tools grip the twisted conductor bar ends of the first layer before twisting of the third layer of conductor bar ends is started.
  • the conductor bar ends are the ends of hairpins.
  • a device for positioning winding elements in particular the ends of winding elements, in particular a stator, of an electrical machine with a plurality of straightening tools and a first drive is provided in order to position the straightening tools in the direction of a first axis.
  • the straightening tools have recesses on their side surfaces and are characterized in that two adjacent straightening tools form a fixing tool and the straightening tools of the respective fixing tool have their cutouts on side surfaces that are oriented towards one another, so that at least one of the winding elements can be fitted and/or or clamping between the straightening tools of the fixing tool and a second drive is provided, by means of which both straightening tools can be moved in the direction of a second axis, so that the distance between the two straightening tools of the respective fixing tool can be changed in the direction of the second axis and each of the both straightening tools can be delivered laterally to the winding element.
  • the device for positioning winding elements of a winding is provided for positioning the ends of winding elements of a stator winding of an electrical machine.
  • stators are manufactured in large numbers semi-automatically or fully automatically.
  • several straightening tools that can be moved via at least one drive are provided, each Straightening tool can be positioned in the longitudinal direction in each case in the direction along a first associated axis, and the straightening tools have recesses on their side surfaces.
  • two adjacent straightening tools each form a fixing tool and the straightening tools of the respective fixing tool have their recesses on side faces that are oriented toward one another.
  • each of the straightening tools can be positioned laterally in the direction along a second assigned axis, so that the lateral distance between the two straightening tools of the respective fixing tool can be changed and each of the two straightening tools can be advanced laterally onto the winding element, so that at least one of the winding elements can be fixed in at least one of the recesses between the straightening tools of the fixing tool, preferably by fitting and/or clamping.
  • movement in the direction of the first axis is defined as movement along a longitudinal axis of the straightening tool.
  • movement in the direction of the second axis is understood to mean movement at right angles thereto in a plane normal to the alignment of the pins in the stator or to the stator axis.
  • the straightening tools of the fixing tool are arranged one above the other. This is a particularly compact, space-saving embodiment.
  • the winding elements are provided as part of a stator of an electrical machine, for example a permanently excited electrical drive unit.
  • the first axis is oriented radially to the center of the stator with respect to a stator of an electrical machine.
  • the second axis is oriented tangentially with respect to a stator of an electrodynamic machine and/or in a plane normal to the stator axis at right angles to the first axis.
  • the first and the second straightening tool of a fixing tool can each be moved independently of one another in the tangential direction. According to a particularly preferred embodiment, rotation about the stator axis of approximately ⁇ /+ 5 degrees is thus possible. Furthermore, the fingers of each straightening tool can be moved independently of the other straightening tool of a fixing tool. According to a special embodiment, combined movements of a straightening tool and several straightening tools are possible. According to a particular embodiment of the invention, the straightening tools are arranged essentially radially in the longitudinal direction along the first axis assigned to the respective straightening tool, in particular in relation to a radially arranged stator winding of the electrical machine.
  • the straightening tools are at least partially finger-shaped in the longitudinal direction along the first axis assigned to the respective straightening tool, preferably in relation to a radially arranged stator winding of the electrical machine, with a lateral width that decreases in the longitudinal direction.
  • the direction of movement of the straightening tools in the direction of the first axis relative to the winding and the center of the electrodynamic machine is at least partially finger-shaped with a decreasing diameter.
  • the straightening tools are designed as finger-shaped components with lateral recesses. Since the lateral distances between the winding ends decrease towards the center of the stator, the width of the straightening tools preferably also decreases towards the center of the stator.
  • the straightening tools can be advanced onto the winding elements distributed over a predetermined, in particular ring-shaped, circumference. Furthermore, the recesses of the straightening tools form receiving pockets for at least one of the winding elements.
  • the fixing tool forms a fixing chamber for fixing the winding element, preferably in the direction of the first and/or second axis, by advancing or moving the two straightening tools of the fixing tool in the direction of the first and/or the second axis with two opposite receiving pockets of the straightening tools of the fixing tool .
  • one of the two straightening tools of a fixing tool is mechanically supported on the other of the two straightening tools of the fixing tool.
  • the first drive and/or the second drive of the first and second straightening tool of the respective fixing tool is/are set up such that the straightening tools of the respective fixing tool can move independently of one another.
  • the first and/or the second drive are designed as an integrated drive unit.
  • the movement plane defined by the movement of the straightening tools in the direction of the first and second axes is oriented substantially normal to the axial axis of alignment of the winding elements in the electrodynamic machine or the stator axis.
  • the present invention is characterized by a method for positioning the ends of winding elements of an electrical machine.
  • the winding elements are provided in a stator of an electric machine and the winding elements are arranged in slots in the stator and the ends of the winding elements protrude from the slots on at least one side thereof, with at least 2 layers in the stator, in particular more than 7 layers of winding elements are provided and the winding elements are designed as hairpins or I-pins.
  • the first straightening tool of the fixing tool is moved a predetermined distance in the direction of the first axis and then the second straightening tool of the fixing tool is moved the predetermined distance in the direction of the first axis.
  • a movement of the straightening tool in particular a finger-shaped one, in the direction of the second axis carried out.
  • the present invention is characterized by a method for positioning the ends of winding elements of an electrical machine.
  • Several straightening tools and a first drive are provided to position the straightening tools in the direction of a first axis, with the straightening tools having recesses on their side surfaces and two adjacent straightening tools each forming a fixing tool and the straightening tools of the respective fixing tool having their recesses on side surfaces that are oriented towards one another have, so that at least one of the winding elements can be fixed by fitting and/or clamping between the straightening tools of the fixing tool and a second drive is provided, by which both straightening tools in are movable in the direction of a second axis, so that the distance between the two straightening tools of the respective fixing tool can be changed in the direction of the second axis and each of the two straightening tools can be advanced laterally onto the winding element and the straightening tools onto the distributed on a predetermined, in particular ring-shaped, circumference winding elements can be advanced
  • Fig. 1 is a schematic view of an electrodynamic machine in side view and top view
  • FIG. 2 shows a schematic first partial view of a stator with winding elements
  • FIG. 3 shows a schematic second partial view of a stator with winding elements and the positioning tool
  • FIG. 4 shows a schematic third partial view of a stator with winding elements and the positioning tool
  • FIG. 5 shows a schematic fourth partial view of a stator with winding elements and the positioning tool
  • FIG. 6 shows a schematic fifth partial view with the positioning tool and winding elements
  • FIG. 7 shows a schematic sixth partial view with the positioning tool and winding elements
  • FIG. 8 shows a schematic seventh partial view with the positioning tool and winding elements
  • a part of an electrical or electrodynamic machine 1 is shown schematically. It is a stator with a stator housing 2 and a central stator axis 2A, which is used, for example, as part of a permanently excited synchronous machine.
  • the stator housing 2 has laminated cores and suitable slots (not shown).
  • winding elements are introduced into the slots.
  • Such winding elements can have a rectangular cross section, for example, and can be designed as so-called pins, for example I-pins or hairpins.
  • the free ends 4 of the hairpins threaded into the slots of the stator protrude beyond the stator housing 2 at one end of the stator housing.
  • the hairpins On the opposite side of the stator housing, the hairpins, according to a special embodiment of the invention, also protrude beyond the stator housing 2, this being, for example, a curved central part 3 of the winding elements, in particular the hairpins.
  • the winding elements, in particular the hairpins form a plurality in the stator Winding layers, with two adjacent winding layers being spoken of as a winding basket.
  • the winding elements, in particular the hairpins represent the winding of the stator.
  • the ends of the winding elements are also often referred to as the winding overhang.
  • the ends of the hairpins are twisted or twisted using a mechanism known from the prior art or a corresponding method and then joined in a suitable manner.
  • FIG. 1 shows a winding element 4A, in particular a free end of a winding element.
  • a schematic straightening tool 24 is also shown as an example.
  • the straightening tool 24 can be moved in the direction of a first axis 21 by a first drive and in the direction of a second axis 22 by a second drive.
  • the first axis is preferably oriented radially toward the center of the stator, while the second axis is preferably oriented tangentially, or in a plane normal to the stator axis 2A, at right angles to the first axis.
  • the straightening tool 24 can thereby be advanced to the winding element 4A or removed from it again.
  • the device 5 shows a device 5 for positioning the winding elements, in particular the ends of the winding elements 4 .
  • the stator is not shown for the sake of clarity and an isometric view from above of the end winding was selected.
  • the device 5 has alignment tools 6 directed radially inwards for aligning the ends of the winding elements of the end winding.
  • the device has suitable guide and drive devices 7 (illustrated and labeled as examples) for guiding and driving the straightening tools 6 .
  • FIGS. 3 and 4 A first exemplary state of the straightening tools is shown in FIGS. 3 and 4 .
  • a first end 9 of a winding element is fixed by a first straightening tool 10 and a second straightening tool 11 .
  • the first straightening tool 10 and the second straightening tool 11 form a first fixing tool.
  • the end is fixed in a first fixing chamber 12 between the two straightening tools 10,11.
  • the first fixing chamber 12 is in each case defined by a first fixing pocket 13 of the first straightening tool 10 and a first fixing pocket 14 of the second Straightening tool 11 formed, as can be seen clearly in FIG.
  • a twisting tool 8 is indicated, as well as several layers 15 of ends of winding elements, one layer 15 being arranged essentially as a row, essentially concentrically around a center of the stator 2 .
  • FIG. 5 shows a further view of the device according to the invention in a next method step.
  • the first straightening tool 10 is provided in an unchanged position
  • the second straightening tool 11 is shown in a position which differs from the position shown in FIGS. 3 and 4 in that the second straightening tool 11 performs a transverse movement A and has thus moved laterally away from the first end 9 of the winding element, so that the first end 9 of the winding element is now only positioned in the first fixing pocket 13 of the first straightening tool 10 .
  • the second straightening tool 11 performs an axial movement B by a predetermined distance, in particular in the direction of the center of the stator.
  • the second straightening tool 11 moves again in the transverse direction C towards the first end 9 of the winding element.
  • the result of these movements of the straightening tool 11 can be seen in the schematic view in FIG. It shows that the first end of the first winding element 9 is positioned in a second fixing chamber 16, the second fixing chamber 16 being formed by the first fixing pocket 13 of the first straightening tool 10 and a second fixing pocket 17 of the second straightening tool 13.
  • the first end of a second winding element 18 is positioned in the first fixing pocket 13 of the second straightening tool 13 .
  • FIG. 7 shows the result of one of the next method steps.
  • the first straightening tool 10 was moved away from the first end of the first winding element 9 in the transverse direction D, then in the axial direction E, in particular in the direction of the center of the stator and finally in a following method step by moving in the transverse direction F, the first straightening tool can in turn be delivered to the first end of the first winding element 9 so that the state as shown in Fig. 7 is produced.
  • the ends of the winding elements are not damaged by the movement of the straightening tools.
  • FIG. 7 shows that the first end of the first winding element 9 is now positioned in the third fixing chamber 19 formed by the second fixing pocket 20 of the first straightening tool and by the second fixing pocket 17 of the second straightening tool. Furthermore, the first end of the second winding element 18 is positioned in the first fixing chamber 12 formed by the first fixing pocket 13 of the first straightening tool and the first fixing pocket of the second straightening tool. As is clear to a person skilled in the art from the previous explanations, this method is continued until finally all and/or at least a large number of ends of the winding elements are positioned in the corresponding fixing chambers of the straightening tools.
  • first or the second straightening tool first advances axially before the other of the two straightening tools advances axially in a subsequent step. Furthermore, it is possible that the straightening tools at least partially perform a combined axial and transverse movement.
  • FIG. 8 shows a position of the two straightening tools after a few method steps.
  • several layers of the stator winding are already fixed in the two straightening tools and thus secured against the tendency of the winding or the winding baskets to widen. This significantly simplifies subsequent steps such as preparing for joining the ends of the winding elements.

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

Abstract

L'invention concerne un procédé et un dispositif pour positionner les extrémités d'éléments d'enroulement (9), en particulier les extrémités d'éléments d'enroulement d'une machine électrodynamique comprenant une pluralité d'outils de réglage (11) et un premier entraînement pour positionner les outils de réglage (11) dans la direction d'un premier axe, et les outils de réglage ayant des évidements sur leur surface latérale, chaque paire d'outils de réglage adjacents (11) formant un outil de fixation et les outils de réglage de l'outil de fixation correspondant ayant leurs évidements sur des surfaces latérales qui sont orientées l'une vers l'autre de telle sorte qu'au moins un des éléments d'enroulement peut être fixé par ajustement et/ou serrage entre les outils de réglage (11) de l'outil de fixation, et un second entraînement est prévu au moyen duquel les deux outils de réglage peuvent être déplacés dans la direction d'un second axe de telle sorte que l'espacement mutuel entre les deux outils de réglage (11) de l'outil de fixation correspondant peut être modifié dans la direction du deuxième axe, et chacun des deux outils de réglage peut être amené latéralement à l'élément d'enroulement (9).
EP21816393.9A 2020-11-20 2021-11-19 Dispositif pour positionner des éléments d'enroulement Pending EP4248554A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20208782 2020-11-20
PCT/EP2021/082276 WO2022106607A1 (fr) 2020-11-20 2021-11-19 Dispositif pour positionner des éléments d'enroulement

Publications (1)

Publication Number Publication Date
EP4248554A1 true EP4248554A1 (fr) 2023-09-27

Family

ID=73543036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21816393.9A Pending EP4248554A1 (fr) 2020-11-20 2021-11-19 Dispositif pour positionner des éléments d'enroulement

Country Status (2)

Country Link
EP (1) EP4248554A1 (fr)
WO (1) WO2022106607A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6489368B2 (ja) 2015-06-04 2019-03-27 株式会社デンソー 回転電機用固定子の製造装置
DE102018202381A1 (de) 2018-02-16 2019-08-22 Zf Friedrichshafen Ag Vorrichtung und Verfahren zur Herstellung einer Hairpinwicklung
DE102018107598A1 (de) 2018-03-29 2019-10-02 Aumann Beelen Gmbh Verfahren und Vorrichtung zum Fügen von Spulenelementen in einer Anordnung für eine Spule einer elektrodynamischen Maschine
DE102018108615A1 (de) 2018-04-11 2019-10-17 Grob-Werke Gmbh & Co. Kg Fingerelement, Positioniereinheit, Positioniervorrichtung und Positionierverfahren zum Positionieren wenigstens eines Leiterendes

Also Published As

Publication number Publication date
WO2022106607A1 (fr) 2022-05-27

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