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WO1994007251A1 - Twisted-strand conductor - Google Patents

Twisted-strand conductor Download PDF

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Publication number
WO1994007251A1
WO1994007251A1 PCT/AT1993/000143 AT9300143W WO9407251A1 WO 1994007251 A1 WO1994007251 A1 WO 1994007251A1 AT 9300143 W AT9300143 W AT 9300143W WO 9407251 A1 WO9407251 A1 WO 9407251A1
Authority
WO
WIPO (PCT)
Prior art keywords
twisted
conductor
spacers
strand conductor
winding
Prior art date
Application number
PCT/AT1993/000143
Other languages
German (de)
French (fr)
Inventor
Kurt JÄGERSBERGER
Original Assignee
Asta Eisen- Und Metallwarenerzeugungs-Gesellschaft M.B.H.
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 Asta Eisen- Und Metallwarenerzeugungs-Gesellschaft M.B.H. filed Critical Asta Eisen- Und Metallwarenerzeugungs-Gesellschaft M.B.H.
Publication of WO1994007251A1 publication Critical patent/WO1994007251A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
    • H01B7/306—Transposed conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F2027/2838—Wires using transposed wires

Definitions

  • the invention relates to a twisted pair conductor for windings of electrical machines and devices, in particular transformers, which is composed of individual paint-insulated flat partial conductors to form a rectangular cross-section, the partial conductors running obliquely on the two flat sides of the cross-section in the opposite sense and on the narrow sides of the cross-section through a Transfer cranking from one side to the other and the partial conductors arranged one above the other are arranged next to one another.
  • Glass mica coating provided. This covering also served as a cooling channel seal.
  • Wire conductors usually consist of an odd number of coated flat wires made of copper or aluminum, which are stranded or bolted according to a special system. In this process, one conductor at the top and one conductor at the bottom regularly move from one
  • Ladder stack to the other The entire bundle of conductors is provided with a paper insulation that is more or less thick according to the requirements Wrapping paper serves on the one hand as additional insulation in accordance with the dielectric strength to be achieved, and on the other hand is essential for holding the conductor bundle together.
  • an intermediate pressure chip layer is arranged lengthwise between the conductor stacks.
  • spacer plates are now inserted between the turns to form an oil channel for better cooling of the winding.
  • These spacer plates have a thickness of approx. 5 mm. In theory, this thickness could be reduced.
  • this thickness must be selected by the paper insulation enveloping the wire conductor. The paper insulation has the property that it practically detaches from the flat side of the wire conductor and bulges into the cooling channel. It therefore reduces the cross section of the cooling channel. Furthermore, coolant jams occur in the area before and after the spacer plates due to the formation of pockets. So there is bad coolant circulation.
  • a disc coil winding for transformers is known from EP 167 896. Spacer plates are used in this winding for the formation of radial cooling channels. These spacer plates are arranged between the turns and are inserted manually when the winding is being built up. There are also the disadvantages shown above.
  • EP 133 220 discloses an electrical conductor with partial conductor transfer according to Roebel, which is stranded from in particular six partial conductors or elements. These elements are arranged around a square tube in such a way that the square tube serves as the cooling channel.
  • the spacer plates already cited above with their disadvantages had to be used again.
  • the object of the invention is to provide a twisted pair conductor of the type cited at the beginning, which takes account of the needs of machine and device designers and allows a higher utilization of the material while reducing the size.
  • the twisted pair conductor according to the invention is characterized in that spacers consisting of insulating material are arranged on at least one flat side.
  • the winding time is reduced by the twist conductor according to the invention, since the time-consuming insertion of spacer plates for the formation of oil channels between the turns is eliminated during the winding process.
  • the arrangement of these spacers in the course of the manufacture of the twisted pair conductor is simple. After the drill head, a device for adding the spacers is provided. The production speed does not have to be reduced for this measure. In addition, the spacing of the arrangement of the spacers can be freely selected.
  • a covering in the form of a large-meshed glass fabric bandage which is pre-impregnated with partially crosslinked epoxy resin, is provided for fastening the spacers to the wire conductor.
  • a suitable mesh is provided, which on the one hand has the required one
  • the covering is provided only in the area of the spacers.
  • must conventional twisted conductor, even when they are used for low-voltage windings, provided for reasons of bundle cohesiveness with a paper insulation depends on fertiggepreßter winding of the beam geometry by bagging • of the paper between the spacer plates the winding gap and oil passage between the turns decreased.
  • the criterion of this invention is to machine a wire conductor that can be processed efficiently.
  • a sheathing of the twisted pair according to the present invention has the property that after it has hardened, no bulging is possible.
  • the spacers for attachment to the wire conductor are coated on at least one surface with epoxy resin or have a glass fiber fabric pre-impregnated with partially crosslinked epoxy resin.
  • Fig. 1 shows a plan view of the flat side of a twisted pair
  • Fig. 2 shows a plan view of the narrow side
  • Fig. 3 shows a cross section of the twisted pair.
  • the stranded conductor consists of up to approximately 80 partial conductors.
  • the partial conductor is twisted to the twisted conductor, which is done mechanically from the two partial conductor stacks, the uppermost and lowermost partial conductors 2 into the other partial conductor stack, the partial conductors preferably being offset by half the step length.
  • This deformation for the passage of the partial conductor 2 from one partial conductor stack into the other partial conductor stack is the offset 3. After the offset 3 of the partial conductors 2, they run obliquely.
  • the partial conductors 2 have an offset 3, so that the two partial conductor stacks are parallel to one another.
  • An intermediate press-fit layer 4 is arranged between the two partial conductor stacks.
  • Spacers 5 made of insulating material are arranged on at least one flat side of the twist conductor 1.
  • a sheath 6 is provided.
  • This covering 6 is a large-meshed glass fabric bandage pre-impregnated with partially crosslinked epoxy resin and is attached in the area of the spacers 5.
  • the twist conductor 1 has a spacer 5 on a flat side.
  • This spacer 5 is provided on its surface with a glass fiber fabric 7, this glass fiber fabric 7 being pre-impregnated with a partially cross-linked epoxy resin.
  • this stranded conductor 1 results in immense advantages for the production of windings in transformer construction.
  • the overall height of the transformer can be reduced due to the better fill factor.
  • the better fill factor results from the elimination of paper insulation.
  • the thickness of the spacers 5 can also be set smaller than the thickness of the spacer plates, since the paper bulge included in the spacer plates is no longer present.
  • the twisted pair 1 therefore has three obvious advantages.
  • the use reduces the overall height of the transformer with unchanged performance and, on the other hand, one operation, namely the manual insertion of the spacer plates, is omitted.
  • Such a construction will also be described.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)

Abstract

The aim of the invention is to provide a twisted-strand conductor which satisfies the requirements of machine and equipment designers and which permits more efficient utilization of the material while at the same time reducing the structural size. As shown in figures 1 and 2, the individual strands (2) have a crimp (3) so that the two stacks of strands lie parallel to each other. Between the two stacks of strands is a layer of insulating pressboard (4). Located on at least one of the flat faces of the twisted-strand conductor (1) are spacers (5) made of insulating material. In order to hold the bundle of strands together as a twisted-strand conductor (1), a sheath (6) is fitted. This sheath (6) is a wide-mesh glass-fabric binding pre-impregnated with partly cross-linked epoxy resin and is fitted in the region of the spacers (5). The twisted-strand conductor (1) could, of course, also be continuously wound with the a glass-fabric binding. The invention makes it possible for the first time to improve the winding space factor, thus permitting the height of an electrical machine or of other electrical equipment, particularly a transformer, to be reduced. Above all, the twisted-strand conductor enables the winding time to be reduced since the time-consuming insertion of spacer plates during winding to form oil channels between the windings is no longer necessary.

Description

DRILLEITER THIRD PARTY
Die Erfindung betrifft einen Drilleiter für Wicklungen elektrischer Maschinen und Geräte, insbesondere Transformatoren, der aus einzelnen lackisolierten flachen Teilleitern zu einem rechteckigen Querschnitt zusammengesetzt ist, wobei die Teilleiter an den beiden Flachseiten des Querschnitts im entgegengesetzten Sinne schräg verlaufen und an den Schmalseiten des Querschnitts durch eine Kröpfung von einer Seite auf die andere über¬ treten und die übereinander angeordneten Teilleiter nebeneinander angeordnet sind.The invention relates to a twisted pair conductor for windings of electrical machines and devices, in particular transformers, which is composed of individual paint-insulated flat partial conductors to form a rectangular cross-section, the partial conductors running obliquely on the two flat sides of the cross-section in the opposite sense and on the narrow sides of the cross-section through a Transfer cranking from one side to the other and the partial conductors arranged one above the other are arranged next to one another.
Der Einsatz von verdrillten Wicklungsstäben, sogenannten Röbelstäben, im Elektromschinenbau ist bekannt. So werden derartige Wicklungsstäbe zur Unterdrückung bzw. Verminderung der Wirbelstromverluste in den Nutstäben insbesondere großer elektrischer Maschinen verwendet. Um nun im Inneren des Wicklungsstabes, also zwischen den beiden durch Einzelleiter gebildeten Flachseiten, Räume für das axiale Hindurchleiten eines Kühlmittels zu schaffen wurden in den Zwischenraum der beiden Teilleiterstapel eigene Kühlkanäle durch entsprechende Anordnung der Teilleiter oder eigens geformte Rohre angeordnet. Zur Verfestigung des Wicklungsstabes wurde dieser mit einerThe use of twisted winding bars, so-called Röbel bars, in electric machine construction is known. Such winding bars are used to suppress or reduce the eddy current losses in the slot bars, especially large electrical machines. In order to create spaces for the axial passage of a coolant inside the winding rod, that is, between the two flat sides formed by individual conductors, separate cooling channels were arranged in the space between the two partial conductor stacks by appropriate arrangement of the partial conductors or specially shaped tubes. To solidify the winding rod, this was with a
Glas-Glimmerumhüllung versehen. Diese Umhüllung diente auch gleichzeitig als Kühlkanalabdichtung.Glass mica coating provided. This covering also served as a cooling channel seal.
Der Einsatz von Drilleitern als Wicklungsmaterial im Transformatorenbau ist ebenso seit langem bekannt. Dabei bestehen Drilleiter üblicherweise aus einer ungeraden Anzahl von lackierten Flachdrähten aus Kupfer oder Aluminium, die nach einem speziellen System verseilt bzw. verröbelt werden. Bei diesem Vorgang wandert jeweils ein Leiter oben und ein Leiter unten regelmäßig von einemThe use of stranded conductors as winding material in transformer construction has also been known for a long time. Wire conductors usually consist of an odd number of coated flat wires made of copper or aluminum, which are stranded or bolted according to a special system. In this process, one conductor at the top and one conductor at the bottom regularly move from one
Leiterstapel zu dem anderen. Das gesamte Leiterbündel wird mit einer entsprechend den Anforderungen mehr oder minder dicken Papierisolierung versehen, wobei diese Papierumspinnung einerseits als zusätzliche Isolierung entsprechend der zu erzielenden Spannungsfestigkeit dient, andererseits zum Zusammenhalt des Leiterbündels unerläßlich ist. Zur zusätzlichen Bündelstabilität wird eine Preßspanzwischenlage längslaufend zwischen den Leiter¬ stapeln angeordnet.Ladder stack to the other. The entire bundle of conductors is provided with a paper insulation that is more or less thick according to the requirements Wrapping paper serves on the one hand as additional insulation in accordance with the dielectric strength to be achieved, and on the other hand is essential for holding the conductor bundle together. For additional bundle stability, an intermediate pressure chip layer is arranged lengthwise between the conductor stacks.
Beim Verwickeln von derartigen Drilleitern werden nun zwischen den Windungen Distanzplättchen eingelegt, um einen Ölkanal zur besseren Kühlung der Wicklung zu bilden. Diese Distanzplättchen weisen eine Dicke von ca. 5 mm auf. Rein theoretisch könnte diese Dicke vermindert werden. Durch die den Drilleiter umhüllende Papierisolation muß jedoch diese Dicke gewählt werden. Die Papierisolation hat nämlich die Eigenschaft, daß sie sich quasi von der Flachseite des Drilleiters löst und aufgebauscht in den Kühlkanal hineinragt. Sie reduziert also den Kühlkanalquerschnitt. Ferner treten auch im Bereich vor und nach den Distanzplättchen Kühlmittelstaus durch die Taschenbildung auf. Es ist also eine schlechte KühlmittelZirkulation gegeben.When twisting such twisted conductors, spacer plates are now inserted between the turns to form an oil channel for better cooling of the winding. These spacer plates have a thickness of approx. 5 mm. In theory, this thickness could be reduced. However, this thickness must be selected by the paper insulation enveloping the wire conductor. The paper insulation has the property that it practically detaches from the flat side of the wire conductor and bulges into the cooling channel. It therefore reduces the cross section of the cooling channel. Furthermore, coolant jams occur in the area before and after the spacer plates due to the formation of pockets. So there is bad coolant circulation.
Aus der EP 167 896 ist eine Scheibenspulenwicklung für Transformatoren bekannt. Bei dieser Wicklung werden Distanzplättchen für die Bildung radialer Kühlkanäle verwendet. Diese Distanzplättchen sind zwischen den Windungen angeordnet und werden beim Wicklungsaufbau händisch eingelegt. Es ergeben sich darüberhinaus auch die weiter oben aufgezeigten Nachteile.A disc coil winding for transformers is known from EP 167 896. Spacer plates are used in this winding for the formation of radial cooling channels. These spacer plates are arranged between the turns and are inserted manually when the winding is being built up. There are also the disadvantages shown above.
Ferner ist aus der EP 133 220 ein elektrischer Leiter mit TeilleiterTransposition nach Roebel bekannt, der aus insbesondere sechs Teilleitern bzw. Elementen verseilt ist. Diese Elemente werden um ein Vierkantrohr derart angeordnet, daß das Vierkantrohr als der Kühlkanal dient. Für eine bessere Kühlmittelzirkulation mußten wieder die bereits oben mit ihren Nachteilen zitierten Distanzplättchen verwendet werden. Aufgabe der Erfindung ist es, einen Drilleiter der eingangs zitierten Art zu schaffen, der den Bedürfnissen der Maschinen- und Gerätekonstrukteure Rechnung trägt und eine höhere Ausnutzung des Materials bei gleichzeitiger Verringerung der Baugrößen erlaubt.Furthermore, EP 133 220 discloses an electrical conductor with partial conductor transfer according to Roebel, which is stranded from in particular six partial conductors or elements. These elements are arranged around a square tube in such a way that the square tube serves as the cooling channel. For better coolant circulation, the spacer plates already cited above with their disadvantages had to be used again. The object of the invention is to provide a twisted pair conductor of the type cited at the beginning, which takes account of the needs of machine and device designers and allows a higher utilization of the material while reducing the size.
Der erfindungsgemäße Drilleiter ist dadurch gekennzeichnet, daß mindestens an einer Flachseite aus Isolierstoff bestehende Distanzstücke angeordnet sind.The twisted pair conductor according to the invention is characterized in that spacers consisting of insulating material are arranged on at least one flat side.
Mit der Erfindung ist es erstmals möglich, einen günstigeren Wicklungsfüllfaktor zu erreichen, wodurch die Bauhöhe der elektrischen Maschine bzw. des elektrischen Gerätes, vorzugsweise des Transformators, reduziert wird.With the invention, it is possible for the first time to achieve a more favorable winding fill factor, thereby reducing the overall height of the electrical machine or electrical device, preferably the transformer.
Vor allem wird durch den Drilleiter gemäß der Erfindung die Wickelzeit redurziert, da das zeitraubende Einfügen von Distanzplättchen zur Bildung von ölkanälen zwischen den Windungen beim Wickelvorgang wegfällt.Above all, the winding time is reduced by the twist conductor according to the invention, since the time-consuming insertion of spacer plates for the formation of oil channels between the turns is eliminated during the winding process.
Das Anordnen dieser Distanzstücke im Zuge der Drilleiterherstellung ist einfach. Nach dem Drillkopf wird eine Einrichtung zur Beifügung der Distanzstücke vorgesehen. Die Produktionsgeschwindigkeit muß für diese Maßnahme nicht reduziert werden. Darüber hinaus ist auch der Abstand der Anordnung der Distanzstücke frei wählbar.The arrangement of these spacers in the course of the manufacture of the twisted pair conductor is simple. After the drill head, a device for adding the spacers is provided. The production speed does not have to be reduced for this measure. In addition, the spacing of the arrangement of the spacers can be freely selected.
Nach einem weiteren Merkmal der Erfindung ist zur Befestigung der Distanzstücke am Drilleiter eine Umhüllung in Form einer großmaschigen, mit teilvernetzten Epoxidharz vorimprägnierten Glasgewebebandage vorgesehen. Um den Zusammenhalt des Leiterbündels zu gewährleisten und nach einer Wärmebehandlung die mechanische Stabilität des Drilleiters zu erhöhen, wird ein geeignetes Netzgeflecht vorgesehen, das einerseits die entsprechend benötigteAccording to a further feature of the invention, a covering in the form of a large-meshed glass fabric bandage, which is pre-impregnated with partially crosslinked epoxy resin, is provided for fastening the spacers to the wire conductor. In order to ensure the cohesion of the conductor bundle and to increase the mechanical stability of the stranded conductor after heat treatment, a suitable mesh is provided, which on the one hand has the required one
Zugfestigkeit besitzt, andererseits das Trafoöl möglichst ungehindert an dem Drilleiter vorbeiströmen läßt. Gemäß einer besonderen Ausgestaltung der Erfindung ist die Umhüllung nur im Bereich der Distanzstücke vorgesehen. Wie bereits erwähnt, müssen herkömmliche Drilleiter, auch wenn sie für Niederspannungswicklungen eingesetzt werden, aus Gründen des BündelZusammenhalts mit einer Papierisolierung versehen werden, die bei fertiggepreßter Wicklung abhängig von der Bündelgeometrie durch Aufbauschung •des Papiers zwischen den Distanzplättchen den Wickelspalt bzw. Ölkanal zwischen den Windungen verringert. Kriterium diese Erfindung ist es, einen Drilleiter maschinell herzustellen, der rationell verarbeitet werden kann.Has tensile strength, on the other hand allows the transformer oil to flow past the wire conductor as freely as possible. According to a special embodiment of the invention, the covering is provided only in the area of the spacers. As already mentioned, must conventional twisted conductor, even when they are used for low-voltage windings, provided for reasons of bundle cohesiveness with a paper insulation depends on fertiggepreßter winding of the beam geometry by bagging • of the paper between the spacer plates the winding gap and oil passage between the turns decreased. The criterion of this invention is to machine a wire conductor that can be processed efficiently.
Generell muß noch bemerkt werden, daß eine Umhüllung der Drilleiter gemäß der vorliegenden Erfindung die Eigenschaft aufweist, daß nach ihrer Aushärtung keinerlei Aufbauschung mehr möglich sind.In general, it must also be noted that a sheathing of the twisted pair according to the present invention has the property that after it has hardened, no bulging is possible.
Gemäß einem ganz besonderen Merkmal der Erfindung sind die Distanzstücke zur Befestigung am Drilleiter auf mindestens einer Fläche, mit Epoxidharz bestrichen bzw. weisen ein mit teilvernetzten Epoxidharz vorimprägniertes Glasfasergewebe auf. Der Vorteil einer derartigen Ausgestaltung liegt auf der Hand. Die Umhüllung wird nicht mehr vorzusehen sein, da sich der Bündelzusammenhält nach dem Aushärten des Epoxidharzes durch die quasi Verklebung der Zwischenstücke mit den Teilleiterstapeln ergibt.According to a very special feature of the invention, the spacers for attachment to the wire conductor are coated on at least one surface with epoxy resin or have a glass fiber fabric pre-impregnated with partially crosslinked epoxy resin. The advantage of such a configuration is obvious. The sheathing will no longer have to be provided, since the bundle sticks together after the epoxy resin has hardened as a result of the quasi-bonding of the intermediate pieces to the partial conductor stacks.
Die Erfindung wird an Hand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Fig. 1 zeigt eine Draufsicht auf die Flachseite eines Drilleiters, Fig. 2 eine Draufsicht auf die Schmalseite und Fig. 3 einen Querschnitt des Drilleiters.The invention is explained in more detail with reference to exemplary embodiments shown in the drawing. Fig. 1 shows a plan view of the flat side of a twisted pair, Fig. 2 shows a plan view of the narrow side and Fig. 3 shows a cross section of the twisted pair.
Gemäß der Fig. 1 ist die Flachseite eines Drilleiters 1 dargestellt, wobei die Teilleiter übereinander angeordnet sind. Dabei ist es an sich bekannt, daß der Drilleiter aus bis zu zirka 80 Teilleitern besteht. Bei der Verseilung der Teilleiter zum Drilleiter, die maschinell erfolgt, wechselt aus den zwei Teilleiterstapeln jeweils der oberste und der unterste Teilleiter 2 in den anderen Teilleiterstapel über, wobei vorzugsweise die Teilleiter um jeweils die halbe Schrittlänge versetzt werden. Diese Verformung für das Übertreten des Teilleiterε 2 von einem Teilleiterstapel in das andere Teilleiterstapel (Fig. 2) ist die Kröpfung 3. Nach der Kröpfung 3 der Teilleiter 2 verlaufen sie schräg.1 shows the flat side of a twisted conductor 1, the partial conductors being arranged one above the other. It is known per se that the stranded conductor consists of up to approximately 80 partial conductors. When the partial conductor is twisted to the twisted conductor, which is done mechanically from the two partial conductor stacks, the uppermost and lowermost partial conductors 2 into the other partial conductor stack, the partial conductors preferably being offset by half the step length. This deformation for the passage of the partial conductor 2 from one partial conductor stack into the other partial conductor stack (FIG. 2) is the offset 3. After the offset 3 of the partial conductors 2, they run obliquely.
Entsprechend der Fig. 1 und 2 weisen die Teilleiter 2 eine Kröpfung 3 auf, sodaß die beiden Teilleiterstapel zueinander parallel liegen. Zwischen den beiden Teilleiterstapeln ist eine Zwischenpreßspannlage 4 angeordnet. Mindestens an einer Flachseite des Drilleiters 1 sind aus Isolierstoff bestehende Distanzstücke 5 angeordnet.According to FIGS. 1 and 2, the partial conductors 2 have an offset 3, so that the two partial conductor stacks are parallel to one another. An intermediate press-fit layer 4 is arranged between the two partial conductor stacks. Spacers 5 made of insulating material are arranged on at least one flat side of the twist conductor 1.
Um das Zusammenhalten des Teilleiterbündels zu einem Drilleiter 1 zu gewährleisten, ist eine Umhüllung 6 vorgesehen. Diese Umhüllung 6 ist eine großmaschige mit teilvernetzten Epoxidharz vorimprägnierte Glasgewebebandage und ist im Bereich der Distanzstücke 5 angebracht. Natürlich könnte man auch den Drilleiter 1 kontinuierlich mit einer Glasgewebebandage umwickeln.In order to ensure that the partial conductor bundle is held together to form a twisted conductor 1, a sheath 6 is provided. This covering 6 is a large-meshed glass fabric bandage pre-impregnated with partially crosslinked epoxy resin and is attached in the area of the spacers 5. Of course, one could also continuously wrap the wire conductor 1 with a glass fabric bandage.
Gemäß der Fig. 3 weist der Drilleiter 1 an einer Flachseite ein Distanzstück 5 auf. Dieses Distanzstück 5 ist an seiner Oberfläche mit einem Glasfasergewebe 7 versehen, wobei dieses Glasfasergewebe 7 mit einem teilvernetzten Epoxidharz vorimprägniert ist.According to FIG. 3, the twist conductor 1 has a spacer 5 on a flat side. This spacer 5 is provided on its surface with a glass fiber fabric 7, this glass fiber fabric 7 being pre-impregnated with a partially cross-linked epoxy resin.
Durch die Verwendung dieses Drilleiters 1 gemäß der Fig. 3 ergeben sich für die Wicklungserstellung im Transformatorenbau immense Vorteile.The use of this stranded conductor 1 according to FIG. 3 results in immense advantages for the production of windings in transformer construction.
Bei der Herstellung einer Transformatorenwicklung mit einem herkömmlichen Drilleiter, der eine kontinuierliche Papierisolierung und eine zwischen den Teilleiterstapeln vorgesehene längslaufende Preßspanzwischenlage aufweist, müssen händisch für die Schaffung der Ölkanäle Distanzplättchen eingelegt werden. Ferner wird bei der Bemessung der Dicke der Distanzplättchen das bereits erwähnte Aufbauschen des Isolationspapieres berücksichtigt.In the manufacture of a transformer winding with a conventional wire conductor, which has continuous paper insulation and a longitudinally running press-fit intermediate layer provided between the partial conductor stacks, spacer plates must be inserted manually to create the oil channels. Furthermore, when dimensioning the thickness of the spacer plates, the above-mentioned bulging of the insulation paper is taken into account.
Findet nun der Drilleiter 1 gemäß einer Fig. 1 bis 3 Anwendung, so kann die Bauhöhe des Transformators aufgrund des besseren Füllfaktors reduziert werden. Der bessere Füllfaktor ergibt sich aus dem Wegfall der Papierisolation. Darüber hinaus kann auch die Dicke der Distanzstücke 5 geringer als die Dicke der Distanzplättchen angesetzt werden, da die bei den Distanzplättchen eingerechnete Papieraufbauschung nicht mehr gegeben ist.If the wire conductor 1 according to FIGS. 1 to 3 is used, the overall height of the transformer can be reduced due to the better fill factor. The better fill factor results from the elimination of paper insulation. In addition, the thickness of the spacers 5 can also be set smaller than the thickness of the spacer plates, since the paper bulge included in the spacer plates is no longer present.
Für den Transformatorenkonstrukteur hat der Drilleiter 1 also drei unübersehbare Vorteile. Einerseits wird durch die Verwendung die Gesamtbauhöhe des Trafos bei unveränderter Leistung reduziert und anderseits fällt ein Arbeitsgang, nämlich das händische Einlegen der Distanzplättchen, weg. Durch eine derartige Konstruktion wird auch dieFor the transformer designer, the twisted pair 1 therefore has three obvious advantages. On the one hand, the use reduces the overall height of the transformer with unchanged performance and, on the other hand, one operation, namely the manual insertion of the spacer plates, is omitted. Such a construction will also
Kühlleistung wesentlich verbessert, da das Kühlmittel direkt am lackisolierten Leiter vorbeiströmt. Dies bedeutet meist auch die Reduktion der Mehrfach-Lagenwicklung auf eine Ein-Lagenwicklung. Cooling performance significantly improved because the coolant flows directly past the paint-insulated conductor. This usually also means reducing the multi-layer winding to a single-layer winding.

Claims

P A T E N T A N S P R Ü C H EP A T E N T A N S P R Ü C H E
ι 1. Drilleiter für Wicklungen elektrischer Maschinen und Geräte,insbesondere Transformatoren, der aus einzelnen lackisolierten flachen Teilleitern zu einem rechteckigen Querschnitt zu sammengesetzt ist, wobei die Einzelleiter an den beiden Flachseiten des Querschnitts im ^ entgegengesetzten Sinne schräg verlaufen und an den Schmalseiten des Querschnitts durch eine Kröpfung von einer Seite auf die andere übertreten und die übereinander angeordneten Teilleiter im Querschnitt nebeneinander angeordnet sind, dadurch gekennzeichnet, daß mindestens an einer Flachseite aus Isolierstoff bestehende Distanzstücke (5) angeordnet sind.1. Wire conductor for windings of electrical machines and devices, in particular transformers, which is composed of individual enamel-insulated flat partial conductors to form a rectangular cross-section, the individual conductors running obliquely on the two flat sides of the cross-section in the opposite sense and passing through on the narrow sides of the cross-section transfer an offset from one side to the other and the superimposed partial conductors are arranged next to one another in cross section, characterized in that spacers (5) made of insulating material are arranged on at least one flat side.
2. Drilleiter nach Anspruch 1, dadurch gekennzeichnet, daß zur Befestigung der Distanzstücke (5) am Drilleiter eine Umhüllung (6) in Form einer großmaschigen, mit teilvernetzten Epoxidharz vorimprägnierte Glasgewebebandage vorgesehen ist. Drilleiter nach Anspruch 2, dadurch gekennzeichnet, daß die Umhüllung (6) nur im Bereich der Distanzstücke (5) vorgesehen ist.2. stranded wire according to claim 1, characterized in that for the attachment of the spacers (5) on the stranded wire a sheath (6) is provided in the form of a large-mesh, pre-impregnated with partially crosslinked epoxy resin glass fabric bandage. Drill conductor according to claim 2, characterized in that the covering (6) is provided only in the area of the spacers (5).
4. Drilleiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Distanzstücke (5) zur Befestigung am Drilleiter auf mindestens einer Fläche mit Epoxidharz bestrichen bzw. ein mit teilvernetzten Epoxidharz vorimprägniertes Glasfasergewebe (7) aufweisen. 4. stranded conductor according to one of claims 1 to 3, characterized in that the spacers (5) for attachment to the stranded conductor coated on at least one surface with epoxy resin or have pre-impregnated with partially crosslinked epoxy resin glass fiber fabric (7).
PCT/AT1993/000143 1992-09-16 1993-09-15 Twisted-strand conductor WO1994007251A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1840/92 1992-09-16
AT184092A AT399962B (en) 1992-09-16 1992-09-16 THIRD PARTY

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CN (1) CN1088349A (en)
AT (1) AT399962B (en)
WO (1) WO1994007251A1 (en)

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WO1995030991A1 (en) * 1994-05-10 1995-11-16 Asta Elektrodraht Gmbh Multiple parallel conductor for windings of electric motors and devices
WO2009152858A1 (en) * 2008-06-19 2009-12-23 Siemens Transformers Austria Gmbh & Co Kg Continuously transposed conductor for a winding for an electric machine
US7655867B2 (en) 2003-09-05 2010-02-02 Siemens Aktiengesellschaft Conductor for liquid-cooled windings
WO2019238558A1 (en) 2018-06-12 2019-12-19 Asta Elektrodraht Gmbh Multiple parallel conductor with spacer plates
KR20220011227A (en) * 2020-01-30 2022-01-27 히타치 에너지 스위처랜드 아게 Method and conductor structure for manufacturing electrical windings of electromagnetic induction devices

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DE102018208414A1 (en) * 2018-05-28 2019-11-28 Thyssenkrupp Ag Method for producing stranded wire, method for producing an electric motor, and use of stranded wire

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DE2402149A1 (en) * 1974-01-17 1975-07-24 Transformatoren Union Ag Composite conductor for transformer manufacture - has heat curing binder impregnation in carrier material
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030991A1 (en) * 1994-05-10 1995-11-16 Asta Elektrodraht Gmbh Multiple parallel conductor for windings of electric motors and devices
US7655867B2 (en) 2003-09-05 2010-02-02 Siemens Aktiengesellschaft Conductor for liquid-cooled windings
WO2009152858A1 (en) * 2008-06-19 2009-12-23 Siemens Transformers Austria Gmbh & Co Kg Continuously transposed conductor for a winding for an electric machine
WO2019238558A1 (en) 2018-06-12 2019-12-19 Asta Elektrodraht Gmbh Multiple parallel conductor with spacer plates
CN112534525A (en) * 2018-06-12 2021-03-19 阿斯塔导线有限公司 Multiple parallel conductors with spacer plates
JP2021528868A (en) * 2018-06-12 2021-10-21 アスタ・エレクトロドラート・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Multiple parallel conductors with spacer plates
US11398324B2 (en) 2018-06-12 2022-07-26 Asta Elektrodraht Gmbh Multiple parallel conductor with spacer plates
JP7250120B2 (en) 2018-06-12 2023-03-31 アスタ・エレクトロドラート・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Multiple parallel conductors with spacer plates
CN112534525B (en) * 2018-06-12 2024-02-06 阿斯塔导线有限公司 Multiple parallel conductors with spacer plates
KR20220011227A (en) * 2020-01-30 2022-01-27 히타치 에너지 스위처랜드 아게 Method and conductor structure for manufacturing electrical windings of electromagnetic induction devices
KR102411469B1 (en) 2020-01-30 2022-06-22 히타치 에너지 스위처랜드 아게 Method and conductor structure for manufacturing electrical windings of electromagnetic induction devices
US11657961B2 (en) 2020-01-30 2023-05-23 Hitachi Energy Switzerland Ag Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus

Also Published As

Publication number Publication date
AT399962B (en) 1995-08-25
ATA184092A (en) 1994-12-15
CN1088349A (en) 1994-06-22

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