EP0056580B1 - Winding for an air-cooled dry transformer or reactor having spacers in the air channels - Google Patents

Winding for an air-cooled dry transformer or reactor having spacers in the air channels Download PDF

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Publication number
EP0056580B1
EP0056580B1 EP82100047A EP82100047A EP0056580B1 EP 0056580 B1 EP0056580 B1 EP 0056580B1 EP 82100047 A EP82100047 A EP 82100047A EP 82100047 A EP82100047 A EP 82100047A EP 0056580 B1 EP0056580 B1 EP 0056580B1
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EP
European Patent Office
Prior art keywords
winding
supporting legs
winding according
distance elements
interconnected
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Expired
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EP82100047A
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German (de)
French (fr)
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EP0056580A1 (en
Inventor
Jacobus F.H. Van Der Vegt
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Holec Systemen en Componenten BV
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Smit Transformatoren BV
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Application filed by Smit Transformatoren BV filed Critical Smit Transformatoren BV
Priority to AT82100047T priority Critical patent/ATE15293T1/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
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • 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
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid

Definitions

  • the invention relates to a winding for a dry-type transformer or an inductor, in which the cavity between at least two winding layers is subdivided into a plurality of axially extending cooling channels by an axially aligned spacer arrangement, the spacer arrangement having supporting legs which are connected to one another at a distance.
  • the invention is therefore based on the basic idea of using individual spacer elements which do not have a full profile but a web profile.
  • Such spacer elements can be produced in a simple manner by extrusion from plastic.
  • the support legs can lie parallel to one another and, in cross section, form an H or ⁇ configuration together with the connecting web.
  • the H configuration has the advantage that the top and bottom are the same when inserting.
  • the ⁇ configuration again leads to a somewhat greater strength, since the connecting crossbar forms a kind of roof.
  • the spacer elements can, for example, be applied to an auxiliary carrier provided with an adhesive layer. It is also possible to connect them to one another at their free ends or in other areas via a spray skin or a thin film.
  • the film should be so thin or appropriately perforated that it can easily be torn again.
  • the partial winding which is shown in FIG. 1, is produced from winding wire or as a foil winding, as is known per se as prior art.
  • the spacer elements 3 are designed as an open profile, which has an IT- shaped cross section. This configuration consists of two support legs 4, 5, which are parallel to each other and rigidly connected to one another with a connecting web 6 lying perpendicular thereto are.
  • the wall thickness of the support legs is about 5-20% of the cross-sectional width or height.
  • This shape of the spacer elements enables the free part of the cross section of the spacer elements to be used for the heat transport through the cooling air, while at the same time a relatively dense covering of the circumference with spacer elements is possible to increase the strength. Due to this denser assignment, the winding can be wound with a higher proportion of metal (proportion of active material).
  • the spacer elements can be connected to one another at their feet or free ends 7 with a fine spray skin 8, so that insertion is facilitated.
  • a fine spray skin instead of a spray skin, a thin film, which is advantageously easy to tear, can also be used.
  • the spacer elements are preferably made of plastic in the extrusion process or of glass fiber reinforced plastic, the fiber preferred direction being in the element axis direction.
  • FIGS. 2a to d show a cross-sectional shape similar to that in FIG. 1.
  • the support legs 4, 5 end in foot-like widenings 9.
  • the spacer elements have stiffeners 10. In the present case, these stiffeners are thickened portions of the plastic mass used.
  • the cross-sectional shape shown in FIG. 2a is therefore suitable for absorbing a greater load than the profile of FIG. 1.
  • FIG. 2b shows a cross-sectional shape in which the support legs 4b, 5b diverge towards the free ends 9b, the ends which are close to one another being connected to one another by a connecting web 6b. This results in a trapezoidal shape in cross section. If the web 6b is omitted and a corresponding inclination of the legs 4b, 5b is selected, a V-shape can also result.
  • FIG. 2c shows an H configuration in which the support legs 4c, 5c are parallel to one another and are linked approximately in the middle by a connecting web 6c.
  • This configuration has the advantage that when inserting this profile cross section, it can be swapped at the top and bottom.
  • FIG. 2d shows a configuration in which the support legs 4d, 5d are parallel to one another and are connected to one another by an arch 6d instead of a straight web.
  • an arch can deflect the applied forces particularly well to the sides.
  • the height and length of the support legs in relation to the connecting webs or the bend results from the necessary distances between the winding layers to be cooled or from the heat dissipation requirements known to the person skilled in the art for a certain electrical winding power. Otherwise, the proportions of the parts relative to one another can be read from FIGS. 1 and 2.
  • the new spacer elements are inserted and attached, as is known.
  • auxiliary spacer elements during the winding and to remove them again after the winding has hardened.
  • glue the spacer elements onto a carrier film and to attach them in the desired arrangement within the windings.
  • the spacer elements can be introduced within the high-voltage or low-voltage winding or can be inserted between the high and low-voltage winding.

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

Abstract

1. A winding for a dry transformer or reactor, in which the hollow space between at least two winding layers (1, 2) is divided into a plurality of axially extending cooling channels by an axially aligned spacer assembly, with the spacer assembly including supporting legs interconnected with a spacing from each other, characterized in that in the spacer assembly, two of the supporting legs (4, 5; 4b, 5b; 4c, 5c; 4d, 5d) each terminate freely and are rigidly interconnected in pairs to define separate distance elements (3).

Description

Die Erfindung betrifft eine Wicklung für einen Trockentransformator oder eine Drosselspule, bei der der Hohlraum zwischen wenigstens zwei Wicklungslagen durch eine axial ausgerichtete Abstandshalteanordnung in mehrere axial verlaufende Kühlkanäle unterteilt ist, wobei die Abstandshalteanordnung miteinander in Abstand verbundene Stützschenkel aufweist.The invention relates to a winding for a dry-type transformer or an inductor, in which the cavity between at least two winding layers is subdivided into a plurality of axially extending cooling channels by an axially aligned spacer arrangement, the spacer arrangement having supporting legs which are connected to one another at a distance.

Es ist bekannt (US-A-1 938 421), bei luftgekühlten Transformatoren Luftkanäle durch Distanzelemente offen zu halten. Die bekannten Distanzelemente sind U-förmig aufgebaut, wobei zwischen die U-Schenkel ein Füllelement eingeschoben ist und die nach außen abgebogenen Schenkel in einem mit angepaßter Aussparung versehenen Streifen gehalten sind. Die Distanzelemente weisen demnach keine versteiften Stützschenkel auf, sondern werden in den stockwerkartig übereinanderliegenden Streifen gehalten. Dadurch werden sie vor dem Knicken bewahrt. Das Füllelement nimmt außerdem weitere Belastungen auf. Der Querschnitt der bekannten Distanzelemente steht praktisch nicht für eine Luftströmung zur Verfügung.It is known (US-A-1 938 421) to keep air ducts open by means of spacer elements in air-cooled transformers. The known spacer elements are constructed in a U-shape, a filler element being inserted between the U-legs and the legs bent outwards being held in a strip provided with an adapted recess. The spacer elements therefore have no stiffened support legs, but are held in the strips lying one above the other in the manner of floors. This prevents them from buckling. The filler element also takes up additional loads. The cross section of the known spacer elements is practically not available for an air flow.

Weiterhin ist bekannt (DE-B-20 51 883), während des Wickelns von Trockentransformatoren zwischen die Wickellagen jeweils Formstücke einzulegen, die Wellenform haben und die als Distanzhalter dienen. Diese bekannten Distanzhalter lassen sich nur schwer so gestalten, daß sie entsprechend den unterschiedlich auftretenden Kräften um die Peripherie der Wicklung verteilte Stützschenkel aufweisen. Dies ist deshalb nachteilig, weil z. B. diejenigen Wicklungslagen, die direkt um den Kernschenkel herum angeordnet sind im Kurzschlußfall mit erheblich höheren Kräften in Richtung kern gedrückt werden, als die weiter außen liegenden Wicklungslagen, bei denen radial nach außen gerichtete Kräfte auftreten. Im letzteren Falle kann, über den Umfanggemessen, die Distanz von Stützschenkel zu Stützschenkel im Mittel größer sein als im ersteren Falle. Eine Veränderung dieser Umfangsdistanzen kann aber mit gewellten Formstücken praktisch nicht erreicht werden. Außerdem kann die Länge der Stützschenkel nicht durch Abfeilen oder Abschneiden geändert werden.Furthermore, it is known (DE-B-20 51 883) to insert shaped pieces which have a wave shape and which serve as spacers during the winding of dry-type transformers between the winding layers. These known spacers are difficult to design so that they have distributed according to the different forces around the periphery of the winding support legs. This is disadvantageous because, for. B. those winding layers which are arranged directly around the core leg in the event of a short circuit are pressed with significantly higher forces in the direction of the core than the further lying winding layers, in which radially outward forces occur. In the latter case, measured over the circumference, the distance from support leg to support leg can on average be greater than in the former case. A change in these circumferential distances can practically not be achieved with corrugated fittings. In addition, the length of the support legs cannot be changed by filing or cutting.

Es stellt sich daher die Aufgabe, bei möglichst straff aufzubringender Wicklung für Trockentransformatoren bzw. Drosselspulen eine relativ dichte Belegung des Hohlraumes mit Stützschenkeln und gleichzeitig eine möglichst hohe Kühlleistung zu erreichen.It is therefore the task to achieve a relatively dense covering of the cavity with support legs and at the same time the highest possible cooling capacity with the winding to be applied as tightly as possible for dry-type transformers or choke coils.

Diese Aufgabe wird bei einer Wicklung der eingangs genannten Art dadurch gelöst, dass bei der Abstandshalteanordnung jeweils zwei der Stützschenkel frei enden und paardweise zu einzelnen Distanzelementen starr miteinander verbunden sind.This object is achieved in the case of a winding of the type mentioned at the outset in that in the spacing arrangement two of the support legs each end freely and are rigidly connected to one another in pairs to form individual spacer elements.

Die Erfindung beruht demnach auf dem Grundgedanken, einzelne Distanzelemente zu verwenden, die kein Vollprofil, sondern ein Stegprofil aufweisen. Derartige Distanzelemente können in einfacher Weise durch Extrudieren aus Kunststoff hergestellt werden.The invention is therefore based on the basic idea of using individual spacer elements which do not have a full profile but a web profile. Such spacer elements can be produced in a simple manner by extrusion from plastic.

Es sind verschiedene Querschnittsformen der Distanzelemente möglich. Die Stützschenkel können parallel zueinander liegen und im Querschnitt zusammen mit dem Verbindungssteg eine H- oder π-Konfiguration bilden. Die H-Konfiguration hat den Vorteil, daß bei dem Einlegen Ober- und Unterseite gleich sind. Die π-Konfiguration wieder führt zu einer etwas größeren Festigkeit,da der verbindende Quersteg eine Art Dach bildet.Different cross-sectional shapes of the spacer elements are possible. The support legs can lie parallel to one another and, in cross section, form an H or π configuration together with the connecting web. The H configuration has the advantage that the top and bottom are the same when inserting. The π configuration again leads to a somewhat greater strength, since the connecting crossbar forms a kind of roof.

Es ist auch möglich, die Stützschenkel zu ihren freien Enden hin divergieren zu lassen, wobei sie im Querschnitt gegebenenfalls zusammen mit einem Verbindungssteg, eine Trapez- oder V-Form bilden. Diese Konfiguration hat den Vorteil, daß die schrägliegenden Stützschenkel eine relativ große Knicklast aufnehmen können. Schließlich ist noch möglich, daß bei parallelen oder im Winkel zueinander stehenden Stützschenkeln diese durch einen Bogen miteinander verbunden sind.It is also possible to have the support legs diverge towards their free ends, with their cross-section possibly forming a trapezoidal or V-shape together with a connecting web. This configuration has the advantage that the inclined support legs can absorb a relatively large buckling load. Finally, it is also possible that in the case of parallel or mutually angled support legs, these are connected to one another by an arch.

Es besteht außerdem der Vorteil, daß die Stützschenkel durch Feilen oder Hobeln in einfacher Weise nachträglich gekürzt werden können.There is also the advantage that the support legs can be subsequently shortened in a simple manner by filing or planing.

Die Distanzelemente können beispielsweise auf einem mit Klebschicht versehenen Hilfsträger aufgebracht sein. Es ist auch möglich, sie an ihren freien Enden oder in anderen Bereichen über eine Spritzhaut oder eine dünne Folie miteinander zu verbinden. Die Folie sollte so dünn oder entsprechend perforiert sein, daß sie auch leicht wieder eingerissen werden kann.The spacer elements can, for example, be applied to an auxiliary carrier provided with an adhesive layer. It is also possible to connect them to one another at their free ends or in other areas via a spray skin or a thin film. The film should be so thin or appropriately perforated that it can easily be torn again.

Weitere Eigenschaften, von denen ein Teil auch in den Unteransprüchen erwähnt ist, werden im folgenden anhand der Beschreibung von Ausführungsbeispielen erläutert. Die zugehörige Zeichnung umfaßt folgende Figuren :

  • Figur 1 zeigt einen Teil einer Wicklung, bei denen zwischen zwei Wicklungslagen Distanzelemente eingebaut sind ;
  • Figuren 2a-d zeigen verschiedene Querschnitte von Distanzelementen.
Further properties, some of which are also mentioned in the subclaims, are explained below on the basis of the description of exemplary embodiments. The accompanying drawing includes the following figures:
  • FIG. 1 shows part of a winding in which spacer elements are installed between two winding layers;
  • Figures 2a-d show different cross sections of spacer elements.

Die Teilwicklung, die in der Figur 1 dargestellt ist, ist aus Wicklungsdraht oder als Folienwicklung hergestellt, wie dies an sich als Stand der Technik bekannt ist. Die zwischen zwei Wicklungslagen 1, 2 in Achsenrichtung (oder im wesentlichen in Achsenrichtung) liegenden, über den Umfang verteilten, stabförmigen Distanzelemente 3 sind relativ dicht angeordnet, jedenfalls in Umfangsrichtung enger und dichter, als es bei den bekannten Vollprofil-Stabelementen üblich ist. Die Distanzelemente 3 sind als ein offenes Profil gestaltet, das einen lT-förmigen Querschnitt hat. Diese Konfiguration besteht aus zwei Stützschenkeln 4, 5, die parallel zueinander liegen und mit einem senkrecht dazu liegenden Verbindungssteg 6 miteinander starr verbunden sind. Die Wandstärke der Stützschenkel beträgt etwa 5-20% der Querschnittsbreite bzw. -höhe. Diese Gestalt der Distanzelemente ermöglicht, daß auch der freie Teil des Querschnittes der Distanzelemente für den Wärmetransport durch die Kühlungsluft ausgenutzt wird, während gleichzeitig eine relativ dichte Belegung des Umfanges mit Distanzelementen zur Erhöhung der Festigkeit möglich ist. Durch diese dichtere Belegung kann die Wicklung mit höherem Metallanteil (Anteil an aktivem Material) gewickelt werden.The partial winding, which is shown in FIG. 1, is produced from winding wire or as a foil winding, as is known per se as prior art. The rod-shaped spacer elements 3, which are distributed over the circumference and are located between two winding layers 1, 2 in the axial direction (or essentially in the axial direction), are arranged relatively densely, at least in the circumferential direction, more closely and denser than is customary in the known full-profile rod elements. The spacer elements 3 are designed as an open profile, which has an IT- shaped cross section. This configuration consists of two support legs 4, 5, which are parallel to each other and rigidly connected to one another with a connecting web 6 lying perpendicular thereto are. The wall thickness of the support legs is about 5-20% of the cross-sectional width or height. This shape of the spacer elements enables the free part of the cross section of the spacer elements to be used for the heat transport through the cooling air, while at the same time a relatively dense covering of the circumference with spacer elements is possible to increase the strength. Due to this denser assignment, the winding can be wound with a higher proportion of metal (proportion of active material).

Die Distanzelemente können an ihren Füßen bzw. freien Enden 7 mit einer feinen Spritzhaut 8 untereinander verbunden sein, so daß Einlegen erleichtert wird. Anstelle einer Spritzhaut kann auch eine dünne Folie, die vorteilhafterweise leicht einzureißen ist, verwendet werden. Die Distanzelemente sind vorzugsweise aus Kunststoff im Extrudierverfahren oder aus glasfaserverstärktem Kunststoff hergestellt, wobei die Faservorzugsrichtung in Element-Achsenrichtung liegt.The spacer elements can be connected to one another at their feet or free ends 7 with a fine spray skin 8, so that insertion is facilitated. Instead of a spray skin, a thin film, which is advantageously easy to tear, can also be used. The spacer elements are preferably made of plastic in the extrusion process or of glass fiber reinforced plastic, the fiber preferred direction being in the element axis direction.

Andere Möglichkeiten der Querschnittskonfiguration sind in den Figuren 2a bis d dargestellt. Figur 2a zeigt eine Querschnittsform ähnlich der in Figur 1. Die Stützschenkel 4, 5 enden in fußartigen Verbreiterungen 9. Im Bereiche der Übergänge von Stützschenkel zum Verbindungssteg 6 weisen die Distanzelemente Versteifungen 10 auf. Diese Versteifungen sind im vorliegenden Falle in den Winkeln angebrachte Verdickungen der verwendeten Kunststoffmasse. Die in Figur 2a dargestellte Querschnittsform ist daher geeignet, eine größere Belastung aufzunehmen als das Profil der Figur 1.Other cross-sectional configuration options are shown in FIGS. 2a to d. FIG. 2a shows a cross-sectional shape similar to that in FIG. 1. The support legs 4, 5 end in foot-like widenings 9. In the region of the transitions from the support leg to the connecting web 6, the spacer elements have stiffeners 10. In the present case, these stiffeners are thickened portions of the plastic mass used. The cross-sectional shape shown in FIG. 2a is therefore suitable for absorbing a greater load than the profile of FIG. 1.

Figur 2b zeigt eine Querschnittsform, bei der die Stützschenkel 4b, 5b, zu den freien Enden 9b hin divergieren, wobei die nahe zueinander liegenden Enden durch einen Verbindungssteg 6b miteinander verbunden sind. Dadurch ergibt sich im Querschnitt eine Trapezform. Wird der Steg 6b weggelassen und eine entsprechende Neigung der Schenkel 4b, 5b gewählt, so kann sich auch eine V-Form ergeben.FIG. 2b shows a cross-sectional shape in which the support legs 4b, 5b diverge towards the free ends 9b, the ends which are close to one another being connected to one another by a connecting web 6b. This results in a trapezoidal shape in cross section. If the web 6b is omitted and a corresponding inclination of the legs 4b, 5b is selected, a V-shape can also result.

Figur 2c zeigt eine H-Konfiguration, bei der die Stützschenkel 4c, 5c, parallel zueinander liegen und etwa in der Mitte durch einen Verbindungssteg 6c verknüpft sind. Diese Konfiguration hat den Vorteil, daß beim Einlegen dieses Profilquerschnittes oben und unten vertauscht werden kann.FIG. 2c shows an H configuration in which the support legs 4c, 5c are parallel to one another and are linked approximately in the middle by a connecting web 6c. This configuration has the advantage that when inserting this profile cross section, it can be swapped at the top and bottom.

Figur 2d zeigt eine Konfiguration, bei der Stützschenkel 4d, 5d parallel zueinander liegen und anstelle eines geraden Steges durch einen Bogen 6d miteinander verbunden sind. Wie bekannt, kann ein Bogen die aufliegenden Kräfte besonders gut nach den Seiten hin ableiten.FIG. 2d shows a configuration in which the support legs 4d, 5d are parallel to one another and are connected to one another by an arch 6d instead of a straight web. As is known, an arch can deflect the applied forces particularly well to the sides.

Die Höhe und Länge der Stützschenkel im Verhältnis zu den Verbindungsstegen bzw. dem Bogen ergibt sich aus den notwendigen Abständen der zu kühlenden Wicklungslagen bzw. aus den dem Fachmann bekannten Wärmeabführungsnotwendigkeiten bei bestimmter elektrischer Wicklungsleistung. Im übrigen lassen sich aus den Figuren 1 und 2 in etwa die Größenverhältnisse der Teile zueinander ablesen.The height and length of the support legs in relation to the connecting webs or the bend results from the necessary distances between the winding layers to be cooled or from the heat dissipation requirements known to the person skilled in the art for a certain electrical winding power. Otherwise, the proportions of the parts relative to one another can be read from FIGS. 1 and 2.

Bei der Montage der Wicklung werden die neuen Distanzelemente eingelegt und angebracht, wie dies bekannt ist. Beispielsweise ist auch möglich, Hilfsdistanzelemente während des Wickelns einzulegen und nach dem Aushärten der Wicklung wieder zu entfernen. Es ist auch möglich, die Distanzelemente auf eine Trägerfolie aufzukleben und in der gewünschten Anordnung innerhalb der Wicklungen anzubringen. Wie bekannt, können die Distanzelemente innerhalb der Oberspannungs- oder Unterspannungswicklung eingebracht oder zwischen die Ober- und Unterspannungswicklung eingelegt werden.When assembling the winding, the new spacer elements are inserted and attached, as is known. For example, it is also possible to insert auxiliary spacer elements during the winding and to remove them again after the winding has hardened. It is also possible to glue the spacer elements onto a carrier film and to attach them in the desired arrangement within the windings. As is known, the spacer elements can be introduced within the high-voltage or low-voltage winding or can be inserted between the high and low-voltage winding.

Claims (8)

1. A winding for a dry transformer or reactor, in which the hollow space between at least two winding layers (1, 2) is divided into a plurality of axially extending cooling channels by an axially aligned spacer assembly, with the spacer assembly including supporting legs interconnected with a spacing from each other, characterized in that in the spacer assembly, two of the supporting legs (4, 5 ; 4b, 5b ; 4c, 5c ; 4d, 5d) each terminate freely and are rigidly interconnected in pairs to define separate distance elements (3).
2. The winding according to claim 1, characterized in that the supporting legs (4, 5 ; 4c, 5c) are disposed in parallel with each other and difine an H-shaped or a-shaped cross-section in conjunction with a connecting web (6, 6c) (Figures 2a, 2c).
3. The winding according to claim 1, characterized in the supporting legs (4b, 5b) diverge toward their free ends (9b) and difine a trapezoidal or V-shaped cross-section (Figure 2b).
4. The winding according to claim 1, characterized in that the supporting legs (4d, 5d) are disposed in parallel or under an angel to each other and interconnected by an arcuate connecting web (6d) (Figure 2d).
5. The winding according to any one of claims 1 to 4, characterized in that the distance elements include stiffeners (10) in the region of the transitions from the supporting leg to the connecting web or arcuate portion.
6. The winding according to claim 1, characterized in that the free end of the distance elements are provided with foot-like enlargements (9).
7. The winding according to claim 1, characterized in that a plurality of distance elements are interconnected at the free ends of the connecting webs through a sprayed skin (8) or a thin sheet of film.
8. The winding according to claim 1, characterized in that the distance elements (3) are formed of fiberglass-reinforced plastics material, with the preferential fiber direction extending in the direction of the element axis.
EP82100047A 1981-01-16 1982-01-07 Winding for an air-cooled dry transformer or reactor having spacers in the air channels Expired EP0056580B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100047T ATE15293T1 (en) 1981-01-16 1982-01-07 WINDING FOR AN AIR-COOLED DRY TRANSFORMER OR FOR A CHOKE COIL WITH SPACERS IN THE AIR DUCT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3101217 1981-01-16
DE3101217A DE3101217C2 (en) 1981-01-16 1981-01-16 Winding for a dry-type transformer with spacer arrangement

Publications (2)

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EP0056580A1 EP0056580A1 (en) 1982-07-28
EP0056580B1 true EP0056580B1 (en) 1985-08-28

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EP82100047A Expired EP0056580B1 (en) 1981-01-16 1982-01-07 Winding for an air-cooled dry transformer or reactor having spacers in the air channels

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EP (1) EP0056580B1 (en)
JP (1) JPS57172707A (en)
AT (1) ATE15293T1 (en)
DE (1) DE3101217C2 (en)

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DE3428613A1 (en) * 1984-08-02 1986-02-13 Transformatoren Union Ag, 7000 Stuttgart LAYER DEVELOPMENT FOR TRANSFORMERS
PL330234A1 (en) 1996-05-29 1999-05-10 Asea Brown Boveri Electromagnetic device
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US6376775B1 (en) 1996-05-29 2002-04-23 Abb Ab Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor
US6417456B1 (en) 1996-05-29 2002-07-09 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
US6577487B2 (en) 1996-05-29 2003-06-10 Asea Brown Boveri Ab Reduction of harmonics in AC machines
US6396187B1 (en) 1996-11-04 2002-05-28 Asea Brown Boveri Ab Laminated magnetic core for electric machines
US6357688B1 (en) 1997-02-03 2002-03-19 Abb Ab Coiling device
US6429563B1 (en) 1997-02-03 2002-08-06 Abb Ab Mounting device for rotating electric machines
US6439497B1 (en) 1997-02-03 2002-08-27 Abb Ab Method and device for mounting a winding
US6465979B1 (en) 1997-02-03 2002-10-15 Abb Ab Series compensation of electric alternating current machines
US6646363B2 (en) 1997-02-03 2003-11-11 Abb Ab Rotating electric machine with coil supports
US6525504B1 (en) 1997-11-28 2003-02-25 Abb Ab Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine
US6525265B1 (en) 1997-11-28 2003-02-25 Asea Brown Boveri Ab High voltage power cable termination

Also Published As

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DE3101217C2 (en) 1984-08-23
EP0056580A1 (en) 1982-07-28
ATE15293T1 (en) 1985-09-15
DE3101217A1 (en) 1982-08-05
JPS57172707A (en) 1982-10-23

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