EP0629311B1 - Coil for high-voltage transformer - Google Patents

Coil for high-voltage transformer Download PDF

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Publication number
EP0629311B1
EP0629311B1 EP92906324A EP92906324A EP0629311B1 EP 0629311 B1 EP0629311 B1 EP 0629311B1 EP 92906324 A EP92906324 A EP 92906324A EP 92906324 A EP92906324 A EP 92906324A EP 0629311 B1 EP0629311 B1 EP 0629311B1
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EP
European Patent Office
Prior art keywords
coil
turn
turns
coil according
connection
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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.)
Expired - Lifetime
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EP92906324A
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German (de)
French (fr)
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EP0629311A1 (en
Inventor
Friedrich Alber
Rudolf Dedelmahr
Siegfried Kromer
Hans Schott
Siegfried Weiss
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Siemens AG
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Siemens AG
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Priority to AT92906324T priority Critical patent/ATE139647T1/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
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • 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
    • H01F27/2847—Sheets; Strips
    • H01F2027/2857—Coil formed from wound foil conductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
    • Y10S174/24—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in an inductive device, e.g. reactor, electromagnet
    • Y10S174/25—Transformer

Definitions

  • the invention relates to a coil, in particular for a high-voltage transformer, in which a first electrically conductive partial turn is designed as a coil former.
  • a transformer coil is known in which a wire winding is applied to a winding body made of non-magnetic metal.
  • the winding body is designed as a sleeve with an axially continuous slot.
  • the start of the winding of the coil is electrically connected to the winding body, an end projection of the winding body serving as an electrical connection for the beginning of the winding of the coil.
  • This winding arrangement is preferably cast in a casting compound, a second connecting element cast in it being electrically connected to the winding end of the coil.
  • This solution is only suitable for low-power transformers, e.g. for small transformers.
  • a coil according to the preamble of claim 1 is known from DE 27 36 092 A1.
  • the windings are made from stable printed circuit boards, each of which is self-supporting. This type of coil and winding structure is only suitable for such high currents at which the required conductor material is already self-supporting due to a conductor cross section.
  • JP-A-52 068 921 an inner connection part for a winding is known which acts as an intermediate piece in a axial slot of an insulating bobbin is inserted.
  • the invention has for its object to provide a coil that is suitable for use at high powers is. Another object is to provide a means for forming a suitable bobbin.
  • the problem is solved with a coil according to claim 1.
  • a coil according to claim 1 At high powers, namely, high forces arise between the connection elements of the coil, which result in repulsion of the connection elements.
  • the design according to the invention provides a coil in which the coil body and the connection elements form a solid structural unit. In this way, there is no need for a special coil former since the first partial turn is self-supporting.
  • the coil is formed from only a few turns, for example in the case of high-current coils for melting furnaces.
  • connection elements are preferably attached to the windings at the end. This gives the coil a compact design.
  • the turns of the coil can be arranged radially between two connection elements. In this way, there is a favorable mechanical arrangement in which repulsive forces between the connection elements or the diversions can be better controlled.
  • the turns of the coil are advantageously wound from a strip conductor. This ensures uniform force and current distribution across the entire coil width.
  • the first turn of the coil is designed as a cylinder with an axial slot. A non-magnetic material is preferred. An insulating part is inserted into the slot to increase stability. In this way, the mechanical strength of the coil is increased again. An additional increase can be achieved if the insulating piece is toothed or fastened with grooves in the slot.
  • the coil is designed as an undervoltage winding of a transformer.
  • a coil 1 shows a coil 1, in particular a transformer coil, in cross section.
  • Your first electrically conductive turn 3 or partial turn is designed as a coil former.
  • it is made of a mechanically stable, non-magnetic material, for example an aluminum alloy, and is designed as a cylinder with an axial slot 5.
  • an insulating piece 7 is inserted into the axial slot 5. This can, for example, be toothed or inserted into the slot 5 in the manner of a tongue and groove connection.
  • the insulating piece 7 should end flush with the first turn on the side facing the further outer turns.
  • the conductor material for the further turns 11 is electrically connected to the first turn 3.
  • the further turns 11 are surrounded by insulating material 13 and are carried by the first turn 3.
  • the first turn 3 has a connection element 15.
  • a second connection element 17 is fastened to this connection element 15 via an insulating part 25 (see FIGS. 2 and 3). This is electrically connected to the other end of the winding formed by the turns 11 with a second turn 18.
  • the turns 11, 18 are arranged between the two connection elements 15, 17.
  • the coil 1 can consist of only two turns, namely the first and the second.
  • cooling channels 19 are arranged concentrically in sectors. These are formed by inserts 21, which are inserted between the individual turns 11, 18. The transition of the conductor from one turn position to the next takes place between two inserts 21a.
  • the conductor for the further turns 11 can be selected as desired. However, a ribbon conductor is preferably used.
  • the first turn 3 which is designed as a slotted cylinder, on which the turns 11, which are not shown in any more detail, are arranged.
  • the first connection element 15 is electrically connected to the first turn 3.
  • This can be formed, for example, as a rail made of a flat material, which can be welded flat on the face of the first turn 3 or, as shown, flat on the inside of the first turn 3.
  • the insulating part 25 is arranged between the two connection elements 15 and 17. This can be cast with the connection elements 15, 17, for example, or by means of screws 27 be mechanically connected to them.
  • the connection elements 15, 17 have holes for fastening electrical lines.
  • the windings of the coil 1 can also be formed by a plurality of disc coils connected to one another.
  • connection elements 15 and 17 are inserted between the connection elements 15 and 17 at both ends of the coil 1.
  • a mechanically stable structural unit is formed by the connection elements 15 and 17 in connection with the first winding 3 designed as a coil former, which also withstands high repulsive forces.
  • this design also allows the coil to be arranged in a mechanically very stable manner on a transformer core, in particular via further insulating parts. This applies in particular to electrical rejections which are connected to the connection elements 15 and 17.
  • the connection elements 15, 17 serve as support elements for the rejections and for the coil 1 itself.
  • the inserts 21 forming the cooling channels 19 can extend over the entire length of the coil, or, as also shown, can be inserted in sections. With this training there is an increased cooling capacity. To increase the stability of the coil 1, the inserts 21 of the individual layers are each arranged radially one above the other.
  • the coil 1 is preferably used as an undervoltage winding for cast resin transformers. Potting is possible. Small numbers of turns come in particular for the coil less than 20, in particular less than 10 turns, for high currents. This applies, for example, to high-current transformers. Cooling channels are provided for thermal reasons. Compared to previous versions, there is no need for additional space for a coil former or for the rejection of the conductors. Versions with very few turns can be manufactured with improved stability compared to previous versions.
  • the first turn 3 is preferably made axially longer than the subsequent turns 11. As a result, the coil can be supported axially and radially on the transformer core via insulating parts.

Abstract

In order to improve the mechanical properties of a coil (1), a first electroconductive winding (39) of the coil (1) is designed as a coil former with a first connecting element (15) to which is secured a second connecting element (17) by means of an insulating part (25). Both connecting elements (15, 17) constitute the connections for the coil (1). A self-supporting coil structure is thus obtained. This coil (1) is particularly suitable as an undervoltage winding with a low number of windings for cast-resin dry-type transformers.

Description

Die Erfindung betrifft eine Spule, insbesondere für einen Hochspannungstransformator, bei der eine erste elektrisch leitende Teilwindung als Spulenkörper ausgebildet ist.The invention relates to a coil, in particular for a high-voltage transformer, in which a first electrically conductive partial turn is designed as a coil former.

Aus der DE-OS 39 17 212 ist eine Transformatorspule bekannt, bei der auf einem Wickelkörper aus nichtmagnetischem Metall eine Drahtwicklung aufgebracht ist. Der Wickelkörper ist dabei als Hülse mit einem axial durchgehenden Schlitz ausgebildet. Der Wicklungsanfang der Spule ist mit dem Wickelkörper elektrisch verbunden, wobei ein stirnseitiger Vorsprung des Wickelkörpers als elektrischer Anschluß für den Wicklungsanfang der Spule dient. Diese Wicklungsanordnung ist bevorzugt in einer Vergußmasse eingegossen, wobei ein zweites darin eingegossenes Anschlußelement elektrisch mit dem Wicklungsende der Spule verbunden ist. Diese Lösung eignet sich nur für Transformatoren geringer Leistung, z.B. für Kleinübertrager.From DE-OS 39 17 212 a transformer coil is known in which a wire winding is applied to a winding body made of non-magnetic metal. The winding body is designed as a sleeve with an axially continuous slot. The start of the winding of the coil is electrically connected to the winding body, an end projection of the winding body serving as an electrical connection for the beginning of the winding of the coil. This winding arrangement is preferably cast in a casting compound, a second connecting element cast in it being electrically connected to the winding end of the coil. This solution is only suitable for low-power transformers, e.g. for small transformers.

Aus der DE 27 36 092 Al ist eine Spule gemäß dem Oberbegriff des Anspruchs 1 bekannt. Die wicklungen sind dabei aus stabilen Leiterplatten gefertigt, die jeweils für sich selbsttragend sind. Diese Art des Spulen- und Wicklungsaufbaus eignet sich nur für derart hohe Ströme, bei der das benötigte Leitermaterial aufgrund eines Leiterquerschnitts von sich aus bereits selbsttragend ist.A coil according to the preamble of claim 1 is known from DE 27 36 092 A1. The windings are made from stable printed circuit boards, each of which is self-supporting. This type of coil and winding structure is only suitable for such high currents at which the required conductor material is already self-supporting due to a conductor cross section.

Aus Patent Abstracts of Japan, Vol. 1., no. 133 (E-77) (6162), 4. Nov. 1977, JP-A-52 068 921 ist ein inneres Anschlußteil für eine Wicklung bekannt, das als Zwischenstück in einen axialen Schlitz eines isolierenden Spulenkörpers eingefügt ist.From Patent Abstracts of Japan, Vol. 1., no. 133 (E-77) (6162), Nov. 4, 1977, JP-A-52 068 921 an inner connection part for a winding is known which acts as an intermediate piece in a axial slot of an insulating bobbin is inserted.

Der Erfindung liegt die Aufgabe zugrunde, eine Spule anzugeben, die für den Einsatz bei großen Leistungen geeignet ist. Eine weitere Aufgabe besteht darin, ein Mittel zum Bilden eines geeigneten Spulenkörpers anzugeben.The invention has for its object to provide a coil that is suitable for use at high powers is. Another object is to provide a means for forming a suitable bobbin.

Die Lösung der Aufgabe gelingt mit einer Spule gemäß Anspruch 1. Bei hohen Leistungen entstehen nämlich zwischen den Anschlußelementen der Spule hohe Kräfte, die ein Abstoßen der Anschlußelemente zur Folge haben. Durch die erfindungsgemäße Ausführung ist eine Spule gegeben, bei der der Spulenkörper und die Anschlußelemente eine feste Baueinheit bilden. Auf diese Weise kann auf einen speziellen Spulenkörper verzichtet werden, da die erste Teilwindung selbsttragend ist.The problem is solved with a coil according to claim 1. At high powers, namely, high forces arise between the connection elements of the coil, which result in repulsion of the connection elements. The design according to the invention provides a coil in which the coil body and the connection elements form a solid structural unit. In this way, there is no need for a special coil former since the first partial turn is self-supporting.

Es ist besonders günstig, wenn die Spule aus nur wenigen Windungen, wie beispielsweise bei Hochstromspulen für Schmelzöfen, ausgebildet sind.It is particularly favorable if the coil is formed from only a few turns, for example in the case of high-current coils for melting furnaces.

Die Anschlußelemente sind bevorzugt stirnseitig an den Windungen befestigt. Die Spule erhält dadurch einen kompakten Aufbau. Die Windungen der Spule können radial zwischen zwei Anschlußelementen angeordnet sein. Auf diese Weise ist eine günstige mechanische Anordnung gegeben, bei der abstoßende Kräfte zwischen den Anschlußelementen oder den Ausleitungen besser beherrschbar sind.The connection elements are preferably attached to the windings at the end. This gives the coil a compact design. The turns of the coil can be arranged radially between two connection elements. In this way, there is a favorable mechanical arrangement in which repulsive forces between the connection elements or the diversions can be better controlled.

Vorteilhafterweise sind die Windungen der Spule aus einem Bandleiter gewickelt. Dadurch ist eine gleichmäßige Kraft- und Stromverteilung auf der gesamten Spulenbreite gegeben. Die erste Windung der Spule ist dabei als Zylinder mit axialem Schlitz ausgebildet. Als Werkstoff ist dabei ein nichtmagnetischer bevorzugt. Zur Erhöhung der Stabilität ist in den Schlitz ein Isolierteil eingefügt sein. Auf diese Weise ist die mechanische Festigkeit der Spule nochmals erhöht. Eine zusätzliche Erhöhung kann dadurch erzielt werden, wenn das Isolierstück verzahnt oder mit Nuten im Schlitz befestigt ist.The turns of the coil are advantageously wound from a strip conductor. This ensures uniform force and current distribution across the entire coil width. The first turn of the coil is designed as a cylinder with an axial slot. A non-magnetic material is preferred. An insulating part is inserted into the slot to increase stability. In this way, the mechanical strength of the coil is increased again. An additional increase can be achieved if the insulating piece is toothed or fastened with grooves in the slot.

In einer bevorzugten Ausführung ist die Spule als Unterspannungswicklung eines Transformators ausgebildet.In a preferred embodiment, the coil is designed as an undervoltage winding of a transformer.

Weitere vorteilhafte Ausgestaltungen ergeben sich aus den übrigen Ansprüchen.Further advantageous embodiments result from the remaining claims.

Die Lösung der weiteren Aufgabe gelingt mit einem Isolierstück gemäß Anspruch 9. Dadurch steht ein einfaches Mittel zur Bildung einer Spule der oben beschriebenen Art zur Verfügung. Kombinationen mit Ausführung der erfindungsgemäßen Spule oder deren Teilmerkmale sind in vorteilhaften Ausgestaltungen möglich.The further task is solved with an insulating piece according to claim 9. This provides a simple means for forming a coil of the type described above. Combinations with execution of the coil according to the invention or its partial features are possible in advantageous configurations.

Die Erfindung und weitere Vorteile werden nachfolgend anhand eines Ausführungsbeispiels und der Zeichnung näher erläutert. Es zeigen:

FIG 1
eine Spule im Querschnitt,
FIG 2
eine Spule in einer Außenansicht und
FIG 3
einen Längsschnitt durch die Spule im Bereich ihrer Anschlußelemente.
The invention and further advantages are explained in more detail below using an exemplary embodiment and the drawing. Show it:
FIG. 1
a coil in cross section,
FIG 2
a coil in an external view and
FIG 3
a longitudinal section through the coil in the region of its connection elements.

FIG 1 zeigt eine Spule 1, insbesondere eine Transformatorspule, im Querschnitt. Ihre erste elektrisch leitende Windung 3 oder Teilwindung ist als Spulenkörper ausgebildet. Sie ist dazu aus einem mechanisch stabilen, nicht magnetischen Material, z.B. einer Aluminiumlegierung, gefertigt und als Zylinder mit axialem Schlitz 5 ausgebildet. Zur Erhöhung ihrer Stabilität ist in den axialen Schlitz 5 ein Isolierstück 7 eingefügt. Dies kann z.B. verzahnt oder nach Art einer Nut- und Federverbindung in den Schlitz 5 eingefügt sein. Zur Erzielung einer günstigen Leiterführung sollte das Isolierstück 7 auf der den weiteren äußeren Windungen zugewendeten Seite plan mit der ersten Windung abschließen.1 shows a coil 1, in particular a transformer coil, in cross section. Your first electrically conductive turn 3 or partial turn is designed as a coil former. For this purpose, it is made of a mechanically stable, non-magnetic material, for example an aluminum alloy, and is designed as a cylinder with an axial slot 5. To increase its stability, an insulating piece 7 is inserted into the axial slot 5. This can, for example, be toothed or inserted into the slot 5 in the manner of a tongue and groove connection. In order to achieve a favorable conductor routing, the insulating piece 7 should end flush with the first turn on the side facing the further outer turns.

An einer vorgegebenen Stelle 9 der ersten Windung 3 ist das Leitermaterial für die weiteren Windungen 11 elektrisch mit der ersten Windung 3 verbunden. Die weiteren Windungen 11 sind dabei von Isoliermaterial 13 umgeben und sind von der ersten Windung 3 getragen. Die erste Windung 3 weist ein Anschlußelement 15 auf. An diesem Anschlußelement 15 ist über ein Isolierteil 25 (siehe FIG 2 und 3) ein zweites Anschlußelement 17 befestigt. Dieses ist mit dem anderen Ende der von den Windungen 11 gebildeten Wicklung mit einer zweiten Windung 18 elektrisch verbunden. Die Windungen 11, 18 sind dabei zwischen den zwei Anschlußelementen 15, 17 angeordnet. In einem einfachen Fall kann die Spule 1 aus nur zwei Windungen, nämlich aus der ersten und der zweiten bestehen.At a predetermined point 9 of the first turn 3, the conductor material for the further turns 11 is electrically connected to the first turn 3. The further turns 11 are surrounded by insulating material 13 and are carried by the first turn 3. The first turn 3 has a connection element 15. A second connection element 17 is fastened to this connection element 15 via an insulating part 25 (see FIGS. 2 and 3). This is electrically connected to the other end of the winding formed by the turns 11 with a second turn 18. The turns 11, 18 are arranged between the two connection elements 15, 17. In a simple case, the coil 1 can consist of only two turns, namely the first and the second.

Zwischen den einzelnen Windungen 11, 18 sind sektorweise konzentrisch angeordnete Kühlkanäle 19 angeordnet. Diese werden durch Einlagen 21 gebildet, welche zwischen den einzelnen Windungen 11, 18 eingefügt werden. Der Übergang des Leiters von einer Windungslage zur nächsten erfolgt zwischen zwei Einlagen 21a. Der Leiter für die weiteren Windungen 11 ist beliebig wählbar. Bevorzugt wird jedoch ein Bandleiter verwendet.Between the individual windings 11, 18, cooling channels 19 are arranged concentrically in sectors. These are formed by inserts 21, which are inserted between the individual turns 11, 18. The transition of the conductor from one turn position to the next takes place between two inserts 21a. The conductor for the further turns 11 can be selected as desired. However, a ribbon conductor is preferably used.

FIG 2 zeigt zur Veranschaulichung eine Außenansicht der Spule 1. Dabei ist wiederum die erste als geschlitzter Zylinder ausgebildete Windung 3 zu erkennen, auf der die nicht weiter näher dargestellten Windungen 11 angeordnet sind. Mit der ersten Windung 3 ist das erste Anschlußelement 15 elektrisch verbunden. Dies kann beispielsweise als Schiene aus einem Flachmaterial ausgebildet sein, die stirnseitig auf die erste Windung 3 oder wie gezeigt, flach auf die Innenseite der ersten Windung 3 aufgeschweißt sein kann. Zwischen den zwei Anschlußelementen 15 und 17 ist das Isolierteil 25 angeordnet. Dies kann mit den Anschlußelementen 15, 17 beispielsweise vergossen oder mittels Schrauben 27 mit diesen mechanisch verbunden sein. Die Anschlußelemente 15, 17 weisen Löcher zum Befestigen von elektrischen Leitungen auf. Durch diese Ausgestaltungen wird eine Spule gebildet, bei der Spulenkörper und Wicklungen eine tragende Baueinheit bilden, die zudem sehr platzsparend ist.2 shows an external view of the coil 1 for illustration. The first turn 3, which is designed as a slotted cylinder, on which the turns 11, which are not shown in any more detail, are arranged. The first connection element 15 is electrically connected to the first turn 3. This can be formed, for example, as a rail made of a flat material, which can be welded flat on the face of the first turn 3 or, as shown, flat on the inside of the first turn 3. The insulating part 25 is arranged between the two connection elements 15 and 17. This can be cast with the connection elements 15, 17, for example, or by means of screws 27 be mechanically connected to them. The connection elements 15, 17 have holes for fastening electrical lines. These configurations form a coil in which the coil body and windings form a load-bearing structural unit which is also very space-saving.

FIG 3 zeigt die Spule in einem Längsschnitt im Bereich ihrer Anschlußelemente 15, 17. Die Windungen der Spule 1 können auch von mehreren miteinander verschalteten Scheibenspulen gebildet sein.3 shows the coil in a longitudinal section in the region of its connection elements 15, 17. The windings of the coil 1 can also be formed by a plurality of disc coils connected to one another.

In dieser Darstellung ist zu erkennen, daß zu beiden Enden der Spule 1 jeweils ein Isolierteil 25 zwischen die Anschlußelemente 15 und 17 eingefügt ist. Auf diese Weise wird durch die Anschlußelemente 15 und 17 in Verbindung mit der als Spulenkörper ausgebildeten ersten Windung 3 eine mechanisch stabile Baueinheit gebildet, die auch hohen abstoßenden Kräften standhält. Zusätzlich erlaubt diese Ausbildung jedoch auch, daß die Spule, insbesondere über weitere Isolierteile, mechanisch sehr stabil auf einem Transformatorkern angeordnet werden kann. Dies gilt insbesondere für elektrische Ausleitungen, die an die Anschlußelemente 15 und 17 angeschlossen werden. Die Anschlußelemente 15, 17 dienen dabei als Tragelemente für die Ausleitungen und für die Spule 1 selbst.In this illustration it can be seen that an insulating part 25 is inserted between the connection elements 15 and 17 at both ends of the coil 1. In this way a mechanically stable structural unit is formed by the connection elements 15 and 17 in connection with the first winding 3 designed as a coil former, which also withstands high repulsive forces. In addition, however, this design also allows the coil to be arranged in a mechanically very stable manner on a transformer core, in particular via further insulating parts. This applies in particular to electrical rejections which are connected to the connection elements 15 and 17. The connection elements 15, 17 serve as support elements for the rejections and for the coil 1 itself.

Die die Kühlkanäle 19 bildenden Einlagen 21 können sich über die gesamte Länge der Spule erstrecken, oder wie auch dargestellt, abschnittsweise eingefügt sein. Mit dieser Ausbildung ergibt sich eine erhöhte Kühlleistung. Zur Erhöhung der Stabilität der Spule 1 sind die Einlagen 21 der einzelnen Lagen jeweils radial übereinander angeordnet.The inserts 21 forming the cooling channels 19 can extend over the entire length of the coil, or, as also shown, can be inserted in sections. With this training there is an increased cooling capacity. To increase the stability of the coil 1, the inserts 21 of the individual layers are each arranged radially one above the other.

Bevorzugt wird die Spule 1 als Unterspannungswicklung für Gießharztransformatoren verwendet. Ein Verguß ist möglich. Für die Spule kommen insbesondere kleine Windungszahlen kleiner als 20, insbesondere kleiner als 10 Windungen, für hohe Ströme zur Anwendung. Dies betrifft z.B. Hochstromtransformatoren. Aus thermischen Gründen sind Kühlkanäle vorgesehen. Gegegenüber früheren Ausführungen braucht kein zusätzlicher Platz für einen Spulenkörper, sowie für die Ausleitung der Leiter vorgesehen werden. Ausführungen mit sehr wenigen Windungen können gegenüber früheren Ausführungen mit verbesserter Stabilität hergestellt werden.The coil 1 is preferably used as an undervoltage winding for cast resin transformers. Potting is possible. Small numbers of turns come in particular for the coil less than 20, in particular less than 10 turns, for high currents. This applies, for example, to high-current transformers. Cooling channels are provided for thermal reasons. Compared to previous versions, there is no need for additional space for a coil former or for the rejection of the conductors. Versions with very few turns can be manufactured with improved stability compared to previous versions.

Bevorzugt wird die erste Windung 3 axial länger als die Folgewindungen 11 ausgeführt. Dadurch kann die Spule über Isolierteile axial und radial am Transformatorkern abgestützt werden.The first turn 3 is preferably made axially longer than the subsequent turns 11. As a result, the coil can be supported axially and radially on the transformer core via insulating parts.

Claims (11)

  1. Coil (1), in particular for a high current transformer, where a first electroconductive turn (3) has a first connection element (15), to which a second connection element (17) is fastened by way of an insulating part (25), which second connection element (17) is electrically connected to a second electroconductive turn (18) which is arranged so as to be insulated with respect to the first turn (3), characterized in that the first turn (3) is constructed as a cylindrical coil body with an axial slot (5), into which an insulating piece (7) is inserted, with the second and perhaps additional turns (11 and 18) being supported so as to be insulated from the first turn (3).
  2. Coil according to claim 1, with the connection elements (15, 17) being arranged at the ends of the turns (18, 3).
  3. Coil according to claim 2, with the turns (3, 11, 18) being arranged between the two connection elements (15, 17).
  4. Coil according to one of claims 1 or 3, with the turns (11, 18) being wound from a strip conductor.
  5. Coil according to one of claims 1 to 4, with the connection elements (15, 17) serving as support elements.
  6. Coil according to one of claims 1 to 5, with concentrically arranged turns (11) being separated from each other by cooling channels formed by spacers.
  7. Coil according to one of claims 1 to 6, with the turns (3, 11, 18) being parts of a common turn.
  8. Coil according to one of claims 1 to 7, with windings formed by the turns (3, 11, 18) serving as transformer windings.
  9. Coil according to one of claims 1 to 8, with the insulating piece (7) mechanically connecting to each other in an electrically insulated manner the two points of the first turn (3), which are adjacent to each other at the axial slot (5), in the sense of forming a coil body.
  10. Coil according to claim 9, whereby to attain a favourable conductor guide on its side facing the additional outer turns (11) the insulating piece (7) closes level with the first turn (3).
  11. Coil according to claim 9 or 10, with the insulating piece (7) and the axial slot (5) being geared to match each other or being formed like a groove and tongue connection.
EP92906324A 1992-03-05 1992-03-05 Coil for high-voltage transformer Expired - Lifetime EP0629311B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92906324T ATE139647T1 (en) 1992-03-05 1992-03-05 COIL FOR A HIGH VOLTAGE TRANSFORMER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1992/000189 WO1993018528A1 (en) 1992-03-05 1992-03-05 Coil for high-voltage transformer

Publications (2)

Publication Number Publication Date
EP0629311A1 EP0629311A1 (en) 1994-12-21
EP0629311B1 true EP0629311B1 (en) 1996-06-19

Family

ID=6874880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92906324A Expired - Lifetime EP0629311B1 (en) 1992-03-05 1992-03-05 Coil for high-voltage transformer

Country Status (5)

Country Link
US (1) US5598137A (en)
EP (1) EP0629311B1 (en)
DE (1) DE59206629D1 (en)
GR (1) GR3020296T3 (en)
WO (1) WO1993018528A1 (en)

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SE9602079D0 (en) 1996-05-29 1996-05-29 Asea Brown Boveri Rotating electric machines with magnetic circuit for high voltage and a method for manufacturing the same
EP1016185A1 (en) 1996-05-29 2000-07-05 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
DE69727917T2 (en) 1996-05-29 2005-01-27 Abb Ab ELECTROMAGNETIC DEVICE
SE510422C2 (en) 1996-11-04 1999-05-25 Asea Brown Boveri Magnetic sheet metal core for electric machines
SE515843C2 (en) 1996-11-04 2001-10-15 Abb Ab Axial cooling of rotor
SE512917C2 (en) 1996-11-04 2000-06-05 Abb Ab Method, apparatus and cable guide for winding an electric machine
SE509072C2 (en) 1996-11-04 1998-11-30 Asea Brown Boveri Anode, anodizing process, anodized wire and use of such wire in an electrical device
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Also Published As

Publication number Publication date
EP0629311A1 (en) 1994-12-21
GR3020296T3 (en) 1996-09-30
US5598137A (en) 1997-01-28
WO1993018528A1 (en) 1993-09-16
DE59206629D1 (en) 1996-07-25

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