EP0021134A1 - Winding, especially high-tension winding for dry-type transformers - Google Patents

Winding, especially high-tension winding for dry-type transformers Download PDF

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Publication number
EP0021134A1
EP0021134A1 EP80103064A EP80103064A EP0021134A1 EP 0021134 A1 EP0021134 A1 EP 0021134A1 EP 80103064 A EP80103064 A EP 80103064A EP 80103064 A EP80103064 A EP 80103064A EP 0021134 A1 EP0021134 A1 EP 0021134A1
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Prior art keywords
winding
layer
layers
glass fibers
turns
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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.)
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EP80103064A
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German (de)
French (fr)
Inventor
Walter Schaich
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Transformatoren Union AG
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Transformatoren Union AG
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Publication of EP0021134A1 publication Critical patent/EP0021134A1/en
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    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers

Definitions

  • the invention relates to a winding, in particular high-voltage winding for dry-type transformers with a plurality of windings arranged radially one above the other in several layers.
  • Such windings have hitherto usually been produced from conductors which are provided with synthetic resin-impregnated braiding for insulation. These windings are clamped and held in place on the transformer with the help of additional modules.
  • the overall structure of these transformers is relatively volume-consuming and the mostly external high-voltage winding is mechanically practically unprotected. In addition, noise problems can only be solved satisfactorily with these transformers with considerable effort.
  • Cast resin transformers known from DE-OS 22 46 235 have recently been used. With these transformers are the windings Poured into compact cast resin blocks and meet practically all loads that occur with regard to electrical and mechanical stress. The noise damping for these transformers is also solved very cheaply by an oscillating clamping. With increasing absolute dimensions and decreasing number of pieces, however, economical production is no longer guaranteed in this way, since in particular the costs for the casting mold have to be apportioned to an insufficient number of pieces. In addition, with relatively large dimensions, as are required for transformers with a rated power of 2 MYA and more, the relatively large absolute dimensions cause shrinkage problems in the synthetic resin layers.
  • an insulating agent-free, bare metal wire is used as a winding conductor that alternately one void-free layer of a viscous slurry of an insulating material and one layer of the winding is applied to an inner support cylinder made of insulating material that the individual Windings of the layers of the winding are pressed into the layer lying radially below them by appropriate adjustment of the winding tension, such that the winding is closed to the outside by an uppermost layer of the insulating material and that the viscous slurry hardens after completion of the winding process.
  • the layers of the viscous slurry are reinforced by loose glass fibers lying next to one another, which pass through a bath of the viscous slurry immediately before they run onto the winding and already during the winding process as a carrier for the viscous slurry serve.
  • the glass fibers run through the bath are parallel to the winding conductor and have approximately its length.
  • short-cut glass fibers are additionally introduced into the viscous pulp to improve the mechanical longitudinal strength of the winding and as a filler.
  • a method for producing glass fiber-reinforced synthetic resin cylinders is known for container construction, in which the glass fibers passed through a bath are wound onto a winding form after being wetted with synthetic resin.
  • short cut glass fibers that have been introduced also serve as filler.
  • this technique is limited to comparatively thin-walled containers with a cylindrical middle part and approximately hemispherical bottoms (article "GFK winding body - sharply calculated” in the magazine “Kunststoff-Beratungs", issue 9/1972).
  • This method of operation is not readily transferable to the manufacture of transformer windings because of the much larger thickness dimensions and the additional inhomogeneity caused by a winding conductor.
  • advantageous configurations are provided such that a curable synthetic resin is used as a viscous slurry and a bare metal wire which is free of insulating agent is used as a winding conductor, for spacing the turns a bundle of synthetic resin-wetted glass fibers introduced into the winding as a bypass to the winding conductor is provided and that this bundle fills at least the outer part of the gap between adjacent turns.
  • the winding according to the invention is very advantageous because it represents an extremely robust cylindrical body which safely absorbs all forces occurring during assembly and operation on and in the winding.
  • the construction of the winding according to the invention enables the production of windings with different dimensions without long set-up times with the help of one and the same device.
  • an inner support cylinder 2 void-free layers 3, windings 4 of a transformer overvoltage winding arranged in layers and a top void-free layer 6 are arranged concentrically around a winding axis 1.
  • bundles 5 of synthetic resin-wetted glass fibers are introduced into the winding in addition to the winding conductor.
  • the winding arrangement according to the invention is produced on a system which, in principle, is shown in FIG. 2 is shown.
  • the inner support cylinder 2 is attached to a winding bench 11.
  • a first void-free layer 3 is then applied from a viscous slurry to the inner support cylinder 2.
  • a multiplicity of glass fibers lying parallel to one another are passed through a bath 9 filled with synthetic resin and in the process wetted with the synthetic resin.
  • the glass fibers lying parallel to each other form a very wide but very thin bundle, which is wound up in several layers on the inner support cylinder 2 and forms a pulpy, void-free layer 3 there together with the synthetic resin.
  • a first layer of turns 4 of the transformer winding is now wrapped in this layer.
  • the depth of penetration of the windings into the layer 3 is determined by the winding tension and the spacing of the windings 4 from one another is ensured by bundles 5 of glass fibers which are likewise wetted with synthetic resin.
  • the bundles 5 are optionally designed as twisted or braided glass fiber cords.
  • a further layer 3 is now applied to the approximately smooth cylindrical surface formed jointly by the windings 4 and the bundles 5 in the same manner as on the inner support cylinder 2.
  • turns 4 are in turn wrapped, the spaces between which are also filled by bundles 5, so that again an approximately smooth cylindrical base is provided for a subsequent layer 3.
  • a total of so many layers 3 and layers consisting of turns 4 are introduced into the arrangement until the required total number of turns 4 is reached.
  • an uppermost layer 6 is wound up regardless of the number of winding layers present just like the layers 3 consists of glass fiber reinforced synthetic resin.
  • a unwinding device for a supply roll 10 is provided, from which the winding conductor for the turns 4 is drawn off for wrapping in the layers 3.
  • end flanges (not shown in the drawing) during the winding over the ends of the inner support cylinder 2, in order thereby to achieve smooth-faced end faces and small longitudinal tolerances of the winding arrangement.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

The invention relates to a winding suitable especially for high-tension windings for dry-type transformers having a multiplicity of turns (4) arranged radially above one another in a plurality of layers. According to the invention, arranged alternately on an inner supporting cylinder (2) of dielectric material there are in each case a blowhole-free layer (3) of a paste of dielectric material, which is still viscous during the winding process, and in each case a layer of the winding consisting of turns (4). In this arrangement, the individual turns (4) are pressed into the layer (3), located in each case radially beneath them, by an appropriate setting of the winding train and the winding is closed to the exterior by a topmost layer (6) of the pasty dielectric material. The viscous paste representing the layers (3) hardens after completion of the winding process. The advantageousness of this winding arrangement consists in that, on the one hand, it is as compact as a winding cast in synthetic resin and, on the other hand, it does not require the production complexity needed for the casting of windings. Winding arrangements according to the invention can be produced in virtually any dimension, in one and the same device. <IMAGE>

Description

Die Erfindung betrifft eine Wicklung, insbesondere Oberspannungswicklung für Trockentransformatoren mit einer Vielzahl von in mehreren Lagen radial übereinander angeordneten Windungen.The invention relates to a winding, in particular high-voltage winding for dry-type transformers with a plurality of windings arranged radially one above the other in several layers.

Derartige Wicklungen werden bisher üblicherweise aus Leitern hergestellt, die zur Isolierung mit kunstharzgetränkten Umspinnungen versehen sind. Diese Wicklungen werden unter Zuhilfenahme von zusätzlichen Baugruppen in ihrer Betriebslage am Transformator eingespannt und festgehalten. Der Gesamtaufbau dieser Transformatoren ist verhältnismäßig volumenaufwendig und die meist außen liegende Oberspannungswicklung ist mechanisch praktisch ungeschützt. Darüberhinaus sind bei diesen Transformatoren Geräuschprobleme nur mit erheblichem Aufwand befriedigend lösbar.Such windings have hitherto usually been produced from conductors which are provided with synthetic resin-impregnated braiding for insulation. These windings are clamped and held in place on the transformer with the help of additional modules. The overall structure of these transformers is relatively volume-consuming and the mostly external high-voltage winding is mechanically practically unprotected. In addition, noise problems can only be solved satisfactorily with these transformers with considerable effort.

In neuerer Zeit sind beispielsweise durch die DE-OS 22 46 235 bekannte Gießharztransformatoren eingesetzt worden. Bei diesen Transformatoren sind die Wicklungen in kompakte Gießharzblöcke eingegossen und erfüllen praktisch alle hinsichtlich der elektrischen und mechanischen Beanspruchung auftretenden Belastungen. Auch die Geräuschdämpfung ist für diese Transformatoren durch eine schwingende Einspannung sehr günstig gelöst. Mit wachsenden absoluten Abmessungen und sinkender Stückzahl ist jedoch auf diese Art eine wirtschaftliche Fertigung nicht mehr gewährleistet, da insbesondere die Kosten für die Gießform auf eine zu kleine Stückzahl umgelegt werden muß. Darüberhinaus treten bei größeren Abmessungen, wie sie bei Transformatoren mit Nennleistungen von 2 MYA und mehr erforderlich werden, durch die verhältnismäßig großen absoluten Abmessungen Schrumpfungsprobleme in den Kunstharzschichten auf.Cast resin transformers known from DE-OS 22 46 235 have recently been used. With these transformers are the windings Poured into compact cast resin blocks and meet practically all loads that occur with regard to electrical and mechanical stress. The noise damping for these transformers is also solved very cheaply by an oscillating clamping. With increasing absolute dimensions and decreasing number of pieces, however, economical production is no longer guaranteed in this way, since in particular the costs for the casting mold have to be apportioned to an insufficient number of pieces. In addition, with relatively large dimensions, as are required for transformers with a rated power of 2 MYA and more, the relatively large absolute dimensions cause shrinkage problems in the synthetic resin layers.

Der Erfindung liegt daher die Aufgabe zugrunde, für Trockentransformatoren eine allen elektrischen und mechanischen Anforderungen genügende Wicklung zu schaffen, die aufgrund ihres Aufbaus mit geringem Aufwand auf einfache Weise in verschiedensten Abmessungen herstellbar ist.It is therefore the object of the invention to provide a winding for dry transformers which meets all electrical and mechanical requirements and which can be easily manufactured in a wide variety of dimensions due to its design and with little effort.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß als Wickelleiter ein isoliermittelfreier, blanker Metalldraht dient, daß auf einen inneren Tragzylinder aus Isolierwerkstoff abwechselnd je eine lunkerfreie Schicht aus einem während des Wickelvorganges zähflüssigen Brei eines Isolierwerkstoffes und je eine Lage der Wicklung aufgebracht ist, daß die einzelnen Windungen der Lagen der Wicklung durch entsprechende Einstellung des Wickelzuges in die jeweils radial unter ihnen liegende Schicht hineingedrückt sind, daß,die Wicklung nach außen durch eine oberste Schicht des Isolierwerkstoffes abgeschlossen ist und daß der zähflüssige Brei nach Abschluß des Wickelvorganges aushärtet. Nach vorteilhaften Ausgestaltungen der Erfindung ist vorgesehen, daß die Schichten aus dem zähflüssigen Brei durch lose, nebeneinander liegende Glasfasern armiert sind, die unmittelbar vor dem Auflaufen auf die Wicklung ein Bad aus dem zähflüssigen Brei durchlaufen und schon während des Wickelvorganges als Träger für den zähflüssigen Brei dienen. Dabei liegen die durch das Bad geführten Glasfasern parallel zum Wickelleiter und haben etwa dessen Länge. Nach einem weiteren Ausgestaltungsmerkmal sind zur Verbesserung der mechanischen Längsfestigkeit der Wicklung und als Füllstoff zusätzlich kurzgeschnittene Glasfasern ungeordnet in den zähflüssigen Brei eingebracht.This object is achieved in that an insulating agent-free, bare metal wire is used as a winding conductor that alternately one void-free layer of a viscous slurry of an insulating material and one layer of the winding is applied to an inner support cylinder made of insulating material that the individual Windings of the layers of the winding are pressed into the layer lying radially below them by appropriate adjustment of the winding tension, such that the winding is closed to the outside by an uppermost layer of the insulating material and that the viscous slurry hardens after completion of the winding process. According to advantageous embodiments of the invention it is provided that the layers of the viscous slurry are reinforced by loose glass fibers lying next to one another, which pass through a bath of the viscous slurry immediately before they run onto the winding and already during the winding process as a carrier for the viscous slurry serve. The glass fibers run through the bath are parallel to the winding conductor and have approximately its length. According to a further design feature, short-cut glass fibers are additionally introduced into the viscous pulp to improve the mechanical longitudinal strength of the winding and as a filler.

Für den Behälterbau ist ein Verfahren zur Herstellung von glasfaserarmierten Kunstharzzylindern bekannt, bei dem die durch ein Bad geführten Glasfasern nach dem Benetzen mit Kunstharz auf eine Wickelform aufgewickelt werden. Als Füllstoff dienen auch hierbei zusätzlich eingebrachte kurzgeschnittene Glasfasern. Diese Technik ist jedoch auf vergleichsweise dünnwandige Behälter mit zylindrischem Mittelteil und annähernd halbkugelförmigen Böden beschränkt (Aufsatz "GFK-Wickelkörper - scharf kalkuliert" in der Zeitschrift "Kunststoff-Berater", Heft 9/1972). Diese Arbeitsweise ist wegen der viel größeren Dickenabmessungen: und der durch einen Wickelleiter bedingten zusätzlichen Inhomogenität nicht ohne weiteres auf die Herstellung von Transformatorwicklungen übertragbar.A method for producing glass fiber-reinforced synthetic resin cylinders is known for container construction, in which the glass fibers passed through a bath are wound onto a winding form after being wetted with synthetic resin. In addition, short cut glass fibers that have been introduced also serve as filler. However, this technique is limited to comparatively thin-walled containers with a cylindrical middle part and approximately hemispherical bottoms (article "GFK winding body - sharply calculated" in the magazine "Kunststoff-Beratungs", issue 9/1972). This method of operation is not readily transferable to the manufacture of transformer windings because of the much larger thickness dimensions and the additional inhomogeneity caused by a winding conductor.

Bei der Herstellung der erfindungsgemäßen Wicklung sind als vorteilhafte Ausgestaltungen vorgesehen, daß als zähflüssiger Brei ein aushärtbares Kunstharz` und als Wickelleiter ein isoliermittelfreier blanker Metalldraht dient, daß zur Distanzierung der Windungen ein als Beilauf zum Wickelleiter in die Wicklung eingebrachtes Bündel aus kunstharzbenetzten Glasfasern vorgesehen ist und daß dieses Bündel mindestens den äußeren Teil der Spalte zwischen benachbarten Windungen ausfüllt.In the manufacture of the winding according to the invention, advantageous configurations are provided such that a curable synthetic resin is used as a viscous slurry and a bare metal wire which is free of insulating agent is used as a winding conductor, for spacing the turns a bundle of synthetic resin-wetted glass fibers introduced into the winding as a bypass to the winding conductor is provided and that this bundle fills at least the outer part of the gap between adjacent turns.

4 Die erfindungsgemäße Wicklung ist sehr vorteilhaft, denn sie stellt einen äußerst robusten zylinderförmigen Körper dar, der alle bei der Montage und im Betrieb an und in der Wicklung auftretenden Kräfte sicher aufnimmt. Darüberhinaus ermöglicht der Aufbau der erfindungsgemäßen Wicklung eine Herstellung von Wicklungen mit verschiedensten Abmessungen ohne große Rüstzeiten mit Hilfe ein und derselben Einrichtung.4 The winding according to the invention is very advantageous because it represents an extremely robust cylindrical body which safely absorbs all forces occurring during assembly and operation on and in the winding. In addition, the construction of the winding according to the invention enables the production of windings with different dimensions without long set-up times with the help of one and the same device.

Anhand einer Zeichnung wird der Aufbau der erfindungsgemäßen Wicklung näher erläutert.

  • Fig. 1 zeigt einen Längsschnitt und
  • Fig. 2 den prinzipiellen Aufbau einer Wickeleinrichtung zur Herstellung von erfindungsgemäßen Wicklungen.
The structure of the winding according to the invention is explained in more detail with reference to a drawing.
  • Fig. 1 shows a longitudinal section and
  • Fig. 2 shows the basic structure of a winding device for producing windings according to the invention.

Im Aufbau der erfindungsgemäßen Wicklung sind konzentrisch um-eine Wickelachse 1 ein innerer Tragzylinder 2, lunkerfreie Schichten 3, in Lagen angeordnete Windungen 4 einer Transformatoroberspannungswicklung und eine oberste lunkerfreie Schicht 6 angeordnet. Um eine lunkerfreie Umhüllung der Windungen 4 und gleichzeitig deren vorgeschriebenen Abstand voneinander zu gewährleisten, sind im Beilauf zum Wickelleiter Bündel 5 aus kunstharzbenetzten Glasfasern in die Wicklung eingebracht.In the construction of the winding according to the invention, an inner support cylinder 2, void-free layers 3, windings 4 of a transformer overvoltage winding arranged in layers and a top void-free layer 6 are arranged concentrically around a winding axis 1. In order to ensure a void-free wrapping of the windings 4 and at the same time their prescribed spacing from one another, bundles 5 of synthetic resin-wetted glass fibers are introduced into the winding in addition to the winding conductor.

Die Herstellung der erfindungsgemäßen Wicklungsanordnung erfolgt auf einer Anlage, die im Prinzip in Fig. 2 dargestellt ist. Dabei wird zunächst der innere Tragzylinder 2 auf einer Wickelbank 11 befestigt. Danach wird eine erste lunkerfreie Schicht 3 aus einem zähflüssigen Brei auf den inneren Tragzylinder 2 aufgebracht. Zu diesem Zweck wird eine Vielzahl von parallel zueinander liegenden Glasfasern durch ein mit Kunstharz gefülltes Bad 9 geführt und dabei mit dem Kunstharz benetzt. Die parallel zueinander liegenden Glasfasern bilden ein sehr breites, jedoch sehr dünnes Bündel, das in mehreren Lagen auf den inneren Tragzylinder 2 aufgewickelt wird und dort zusammen mit dem Kunstharz eine breiige lunkerfreie Schicht 3 bildet. In diese Schicht wird nun eine erste Lage von Windungen 4 der Transformatorwicklung eingewickelt. Hierbei wird die Eindringtiefe der Windungen in die Schicht 3 durch den Wickelzug bestimmt und der Abstand der Windungen 4 untereinander durch Bündel 5 aus ebenfalls kunstharzbenetzten Glasfasern gewährleistet. Die Bündel 5 sind gegebenenfalls als gedrehte oder geflochtene Kordeln aus Glasfasern ausgeführt.The winding arrangement according to the invention is produced on a system which, in principle, is shown in FIG. 2 is shown. First, the inner support cylinder 2 is attached to a winding bench 11. A first void-free layer 3 is then applied from a viscous slurry to the inner support cylinder 2. For this purpose, a multiplicity of glass fibers lying parallel to one another are passed through a bath 9 filled with synthetic resin and in the process wetted with the synthetic resin. The glass fibers lying parallel to each other form a very wide but very thin bundle, which is wound up in several layers on the inner support cylinder 2 and forms a pulpy, void-free layer 3 there together with the synthetic resin. A first layer of turns 4 of the transformer winding is now wrapped in this layer. The depth of penetration of the windings into the layer 3 is determined by the winding tension and the spacing of the windings 4 from one another is ensured by bundles 5 of glass fibers which are likewise wetted with synthetic resin. The bundles 5 are optionally designed as twisted or braided glass fiber cords.

Auf die von den Windungen 4 und den Bündeln 5 gemeinsam gebildete, annähernd glatte zylindrische Oberfläche wird nunmehr eine weitere Schicht 3 in der gleichen Art und Weise wie auf den inneren Tragzylinder 2 aufgebracht. In diese zweite Schicht 3 werden wiederum Windungen 4 eingewickelt, deren Zwischenräume ebenfalls durch Bündel 5 ausgefüllt sind, so daß wiederum eine annähernd glatte zylindrische Unterlage für eine folgende Schicht 3 vorhanden ist. Insgesamt werden so viele Schichten 3 und aus Windungen 4 bestehende Lagen in die Anordnung eingebracht, bis die erforderliche Gesamtanzahl von Windungen 4 erreicht ist. Zum Abschluß der Anordnung wird in jedem Fall unabhängig von der Anzahl der vorhandenen Wicklungslagen eine oberste Schicht 6 aufgewickelt, die ebenso wie die Schichten 3 aus glasfaserarmiertem Kunstharz besteht.A further layer 3 is now applied to the approximately smooth cylindrical surface formed jointly by the windings 4 and the bundles 5 in the same manner as on the inner support cylinder 2. In this second layer 3, turns 4 are in turn wrapped, the spaces between which are also filled by bundles 5, so that again an approximately smooth cylindrical base is provided for a subsequent layer 3. A total of so many layers 3 and layers consisting of turns 4 are introduced into the arrangement until the required total number of turns 4 is reached. At the end of the arrangement, an uppermost layer 6 is wound up regardless of the number of winding layers present just like the layers 3 consists of glass fiber reinforced synthetic resin.

Um die Menge des erforderlichen Kunstharzes so klein wie möglich zu halten, ist es zweckmäßig, auf das zur Bildung der lunkerfreien Schichten 3 aufgewickelte flache Bündel aus Glasfasern nach dem Durchlauf durch das Bad 9 kurzgeschnittene Glasfasern zusätzlich aufzubringen. Zu diesem Zweck ist ein Schneidwerk 8 vorgesehen, von dem aus das kunstharzbenetzte Bündel unmittelbar mit den kurzgeschnittenen Glasfasern 7 beschickt wird.In order to keep the amount of synthetic resin required as small as possible, it is expedient to additionally apply short-cut glass fibers to the flat bundle of glass fibers wound to form the void-free layers 3 after passing through the bath. For this purpose, a cutter 8 is provided, from which the resin-wetted bundle is directly loaded with the short-cut glass fibers 7.

Auf der dem Bad 9 gegenüberliegenden Seite der Wickelbank 11 ist eine Abrollvorrichtung für eine Vorratsrolle 10 vorgesehen, von der aus der Wickelleiter für die Windungen 4 zum Einwickeln in die Schichten 3 abgezogen wird.On the side of the winding bench 11 opposite the bath 9, a unwinding device for a supply roll 10 is provided, from which the winding conductor for the turns 4 is drawn off for wrapping in the layers 3.

Zur Erleichterung des Wickelvorganges ist es zweckmäßig, während des Wickelns über den Enden des inneren Tragzylinders 2 in der Zeichnung nicht dargestellte Endflansche vorzusehen, um dadurch glattflächige Stirnseiten und kleine Längstoleranzen der Wicklungsanordnung zu erzielen. ITo facilitate the winding process, it is expedient to provide end flanges (not shown in the drawing) during the winding over the ends of the inner support cylinder 2, in order thereby to achieve smooth-faced end faces and small longitudinal tolerances of the winding arrangement. I.

Claims (8)

1. Wicklung, insbesondere Oberspannungswicklung für Trockentransformatoren mit einer Vielzahl von in mehreren radial übereinander liegenden Lagen angeordneten Windungen, dadurch gekennzeichnet , - daß als Wickelleiter für die Windungen (4) ein isoliermittelfreier, blanker Metalldraht dient, - daß auf einen inneren Tragzylinder (2) aus Isolierwerkstoff abwechselnd je eine lunkerfreie Schicht (3) aus einem während des Wickelvorganges zähflüssigen Brei eines Isolierwerkstoffes und je eine Lage der Wicklung aufgebracht ist, - daß die einzelnen Windungen (4) der Lagen der Wicklung durch entsprechende Einstellung des Wickelzuges in die jeweils radial unter ihnen liegende Schicht (3) hineingedrückt sind, - daß die Wicklung nach außen durch eine oberste Schicht (6) des Isolierwerkstoffes abgeschlossen ist und i - daß der zähflüssige Brei nach Abschluß des Wickelvorganges aushärtet. 1. winding, in particular high-voltage winding for dry-type transformers with a plurality of windings arranged in a plurality of layers lying radially one above the other, characterized in that - That serves as a winding conductor for the turns (4), a bare metal wire free of insulating agent, - That an alternating void-free layer (3) of a viscous slurry of an insulating material and one layer of the winding is applied alternately to an inner support cylinder (2) made of insulating material, - That the individual turns (4) of the layers of the winding are pressed into the layer (3) lying radially below them by appropriate adjustment of the winding tension, - That the winding is completed by an uppermost layer (6) of the insulating material and i - that the viscous slurry hardens after completion of the winding process. 2. Wicklung nach Anspruch 1, dadurch gekennzeichnet, daß die Schichten (3) aus dem zähflüssigen Brei durch lose, nebeneinander liegende Glasfasern armiert sind, die unmittelbar vor dem Auflaufen auf die Wicklung ein Bad (9) aus dem zähflüssigen Brei durchlaufen und schon während des Wickelvorganges als Träger für den zähflüssigen Brei dienen.2. Winding according to claim 1, characterized in that the layers (3) of the viscous slurry are reinforced by loose glass fibers lying next to one another, which pass through a bath (9) from the viscous slurry immediately before emergence on the winding and already during of the winding process serve as a carrier for the viscous porridge. 3. Wicklung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die durch das Bad (9) geführten Glasfasern parallel zum Wickelleiter liegen und etwa dessen Länge haben.3. Winding according to claim 1 and 2, characterized in that the glass fibers guided through the bath (9) lie parallel to the winding conductor and have approximately its length. 4. Wicklung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß zur Verbesserung der mechanischen Längsfestigkeit der Wicklung und gleichzeitig als Füllstoff zusätzlich kurzgeschnittene Glasfasern (7) ungeordnet in die Schichten (3) aus zähflüssigem Brei eingebracht sind.4. Winding according to claim 1 to 3, characterized in that in order to improve the mechanical longitudinal strength of the winding and at the same time as a filler additionally short-cut glass fibers (7) are introduced into the layers (3) of viscous slurry. 5. Wicklung nach Anspruch 1 bis 4, dadurch g e kennzeichnet, daß als zähflüssiger Brei ein aushärtbares Kunstharz dient.5. Winding according to claim 1 to 4, characterized in that a curable synthetic resin serves as viscous paste. 6. Wicklung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß zur Distanzierung der Windungen (4) ein als Beilauf zum Wickelleiter in die Wicklung eingebrachtes Bündel (5) aus kunstharzbenetzten Glasfasern oder dergleichen vorgesehen ist.6. Winding according to claim 1 to 5, characterized in that a bundle (5) made of synthetic resin-wetted glass fibers or the like is provided for spacing the windings (4) as a bypass to the winding conductor in the winding. 7. Wicklung nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß das Bündel (5) aus kunstharzbenetzten Glasfasern mindestens den äußeren Teil der Spalte zwischen benachbarten Windungen (4) ausfüllt und daß das Bündel (5) von einer gedrehten oder geflochtenen Kordel dargestellt ist.7. Winding according to claim 1 to 6, characterized in that the bundle (5) made of resin-wetted glass fibers fills at least the outer part of the gap between adjacent turns (4) and that the bundle (5) is represented by a twisted or braided cord. 8. Wicklung nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die wicklungsseitigen Enden von Isolierstoffschläuchen auf den Wicklungsausleitungen mindestens in der obersten Schicht (6) des Kunstharzes verankert sind.8. Winding according to claim 1 to 7, characterized in that the winding-side ends of insulating sleeves are anchored on the winding leads at least in the uppermost layer (6) of the synthetic resin.
EP80103064A 1979-06-15 1980-06-02 Winding, especially high-tension winding for dry-type transformers Withdrawn EP0021134A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2924191 1979-06-15
DE19792924191 DE2924191A1 (en) 1979-06-15 1979-06-15 WINDING, ESPECIALLY OVERVOLTAGE WINDING FOR DRY TRANSFORMERS

Publications (1)

Publication Number Publication Date
EP0021134A1 true EP0021134A1 (en) 1981-01-07

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EP80103064A Withdrawn EP0021134A1 (en) 1979-06-15 1980-06-02 Winding, especially high-tension winding for dry-type transformers

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EP (1) EP0021134A1 (en)
JP (1) JPS5645009A (en)
DE (1) DE2924191A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600612A1 (en) * 1992-11-05 1994-06-08 Bba Canada Limited Air core reactor with conductor winding rigidly anchored to structural sleeve
CN103295747A (en) * 2013-05-27 2013-09-11 中电电气(江苏)股份有限公司 High-voltage lead winding of open-type transformer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ200399A (en) * 1981-05-15 1985-12-13 Westinghouse Electric Corp Forming paperless electric coils:winding conductor on gelled insulation coating

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE856661C (en) * 1949-05-08 1952-11-24 Siemens Ag Method of insulating electrical coils
DE1130019B (en) * 1960-12-22 1962-05-24 Fritz Huettinger High or medium frequency transmitters, in particular for generating induction heat
DE975986C (en) * 1946-10-26 1963-01-03 Moser Glaser & Co A G Process for producing a breakdown-proof covering for windings
DE1153456B (en) * 1959-03-25 1963-08-29 Licentia Gmbh Method for insulating electrical windings using low-pressure resin
GB1058693A (en) * 1963-10-02 1967-02-15 Licentia Gmbh Improvements in and relating to electrical windings
FR1534678A (en) * 1965-12-31 1968-08-02 Merlin Gerin Inductance coil
DE1464337A1 (en) * 1962-06-28 1969-01-09 Phoenix Gummiwerke Ag Process for the production of insulated wire windings for electrical coils
DE1287201B (en) * 1963-03-08 1969-01-16 Robert Birkenbeul Gmbh Process for the production of transformer coil bodies
US3867758A (en) * 1973-07-06 1975-02-25 Anaconda Co Method of making glass insulated electrical coils

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975986C (en) * 1946-10-26 1963-01-03 Moser Glaser & Co A G Process for producing a breakdown-proof covering for windings
DE856661C (en) * 1949-05-08 1952-11-24 Siemens Ag Method of insulating electrical coils
DE1153456B (en) * 1959-03-25 1963-08-29 Licentia Gmbh Method for insulating electrical windings using low-pressure resin
DE1130019B (en) * 1960-12-22 1962-05-24 Fritz Huettinger High or medium frequency transmitters, in particular for generating induction heat
DE1464337A1 (en) * 1962-06-28 1969-01-09 Phoenix Gummiwerke Ag Process for the production of insulated wire windings for electrical coils
DE1287201B (en) * 1963-03-08 1969-01-16 Robert Birkenbeul Gmbh Process for the production of transformer coil bodies
GB1058693A (en) * 1963-10-02 1967-02-15 Licentia Gmbh Improvements in and relating to electrical windings
FR1534678A (en) * 1965-12-31 1968-08-02 Merlin Gerin Inductance coil
US3867758A (en) * 1973-07-06 1975-02-25 Anaconda Co Method of making glass insulated electrical coils

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600612A1 (en) * 1992-11-05 1994-06-08 Bba Canada Limited Air core reactor with conductor winding rigidly anchored to structural sleeve
CN103295747A (en) * 2013-05-27 2013-09-11 中电电气(江苏)股份有限公司 High-voltage lead winding of open-type transformer

Also Published As

Publication number Publication date
JPS5645009A (en) 1981-04-24
DE2924191A1 (en) 1980-12-18

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