DE3422746A1 - Insulating system for layer windings - Google Patents

Insulating system for layer windings

Info

Publication number
DE3422746A1
DE3422746A1 DE19843422746 DE3422746A DE3422746A1 DE 3422746 A1 DE3422746 A1 DE 3422746A1 DE 19843422746 DE19843422746 DE 19843422746 DE 3422746 A DE3422746 A DE 3422746A DE 3422746 A1 DE3422746 A1 DE 3422746A1
Authority
DE
Germany
Prior art keywords
insulating
conductors
winding
windings
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19843422746
Other languages
German (de)
Inventor
Walter Ing. Weiz Kienreich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Hydro GmbH Austria
Original Assignee
Andritz Hydro GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andritz Hydro GmbH Austria filed Critical Andritz Hydro GmbH Austria
Publication of DE3422746A1 publication Critical patent/DE3422746A1/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/32Insulating of coils, windings, or parts thereof
    • H01F27/323Insulation between winding turns, between winding layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/30Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303Clamping coils, windings or parts thereof together
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/32Insulating of coils, windings, or parts thereof
    • H01F27/322Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Insulated Conductors (AREA)

Abstract

The current-carrying conductors of the windings or else the individual winding layers have to be insulated from one another for reasons of dielectric strength. Similarly, the coils are subjected to great mechanical forces, which often can only be controlled by very expensive measures. The object of the invention is to provide an insulating system which forms a compact block of windings clamped together in every direction and ensures complete impregnation with insulating liquid. In the insulating arrangement for layer windings in the case of coils of liquid-cooled transformers and inductors, in which the electric conductors (1) of square or rectangular cross-section are arranged with insulating tapes (2), the insulating tapes (2) have a heat-activatable adhesive layer. For impregnating the coil with insulating oil, the electric conductors (1) of the layer winding are in each case wrapped with insulating tape (2), on which adhesive resin spots (2) are printed, as a multi-layered insulating covering applied transversely to the conductor winding. <IMAGE>

Description

n Isoliersystem für Lagenwicklungen"n insulation system for layer windings "

Die Erfindung betrifft ein Isoliersystem für Lagenwicklungen von insbesondere flüssigkeitsgekuhlten Transformatoren und Drosselspulen, wobei die Leiter rechteckigen oder runden Querschnitt aufweisen.The invention relates to an insulation system for layer windings of in particular liquid-cooled transformers and reactors, the conductors being rectangular or have a round cross-section.

Die stromführenden Leiter der Wicklungen mtlssen aus Gründen der elektrischen Spannungsfestigkeit gegeneinander isoliert werden. Desgleichen nrLkssen auch die einzelnen Wicklungslagen, entsprechend der auftretenden elektrischen Spannungabeanapruehung, gegeneinander isoliert bzw. distanziert werden.The current-carrying conductors of the windings must be used for electrical reasons Dielectric strength can be isolated from each other. Likewise, they do the same individual winding layers, according to the occurring electrical voltage application, isolated or distanced from each other.

Neben der elektrischen Spannungsbeanspruchung sind die Spulen im Betrieb und bei Netzkurzschlüssen auch großen mechanischen Kräften ausgesetzt, die nur durch besondere, oft sehr kostspielige Maßnahmen beherrscht werden können. So wird beispielsweise die PrimOr- und Sekundärwicklung zueinander symmetrisch angeordnet. Auch achsiale Abstützungen der Spulen sind bekannt, Auch eine mechanische Verfestigung der Spulen durch Einstrich oder Imprägnierung mit Klebeharzen wurden schon vorgeschlagen.In addition to the electrical voltage stress, the coils are in operation and in the event of a network short-circuit, they are also exposed to large mechanical forces that only occur through special, often very expensive measures can be mastered. For example the primary and secondary windings are arranged symmetrically to one another. Axial too Supports for the coils are known, as well as mechanical strengthening of the coils by painting or impregnation with adhesive resins have already been proposed.

Wie schon eingangs erwähnt, müssen die stromfllhrenden Leiter gegeneinander isoliert sein. In der Regel werden die Leiter mit einer Schicht Isolierlack versehen oder mit Isolierfolien, meist Papier, umsponnen.As already mentioned at the beginning, the current-carrying conductors must face each other be isolated. As a rule, the conductors are provided with a layer of insulating varnish or wound with insulating film, usually paper.

Die Isolation zwischen den Wicklungslagen besteht in der Regel aus in mehreren Lagen aufgebrachten Isolierfolien.The insulation between the winding layers usually consists of insulating foils applied in several layers.

Um eine außreichende mechanische Festigkeit der Spulen zu erzielen, reichen die oben einzeln beschriebenen Maßnahmen nicht immer aus und müssen durch Kombination der Maßnahmen ergänzt werden.In order to achieve sufficient mechanical strength of the coils, The measures described above are not always sufficient and must be followed through Combination of measures to be supplemented.

Eine mechanische Verfestigung der Spulen durch Einstrich oder Imprägnierung mit Klebeharzen ist bei flüssigkeitgekühlten Spulen sehr problematisch, da gas- und luftgefüllte Bläschen und Kammern entstehen können, die sich sehr nachteilig auf die elektrischen Eigenschaften des Isoliersystemss auswirken. Gleiche Probleme treten auch beim Einsatz von Isolierfolien auf, die ganzflächig mit Klebeharz im B-Zustand beschichtet sind.A mechanical strengthening of the coils by coating or impregnation with adhesive resins is very problematic with liquid-cooled coils, since gas- and air-filled vesicles and chambers can arise, which are very detrimental affect the electrical properties of the insulation system. Same problems also occur with the use of insulating foils, which are coated with adhesive resin over the entire surface B-stage are coated.

Aufgabe der Erfindung ist es, ein Isoliersvstem der eingangs genannten Art zu schaffen, daß die Nachteile der obigen Maßnahmen vermeidet und einerseits einen kompakten, in jeder Richtung kraftschlüsaigen Wicklungsblock bildet und andererseits auch eine vollständige Durchtränkung mit Isolierflüssigkeit gewährleistet.The object of the invention is to provide an insulating system of the type mentioned at the beginning Kind to create that avoids the disadvantages of the above measures and on the one hand forms a compact winding block that is frictional in every direction and on the other hand complete soaking with insulating liquid is also guaranteed.

Die Erfindung ist dadurch gekennzeichnet, daß diese Leiter mit mindestens einem punktweise harzbeschichteten Isolierband, das aus Isolierpapier, Preßspan od. dgl. und einem unausgehärteten Klebeharz besteht, umsponnen sind und das Klebeharz bei der anschließenden Wärmebehandlung der Wicklung dickflüssig mit den anliegenden Materialien verklebt und nach längerer Wärmeeinwirkung aushärtet.The invention is characterized in that these conductors with at least a point-wise resin-coated insulating tape made of insulating paper, pressboard Od. Like. And an uncured adhesive resin, are wound and the adhesive resin During the subsequent heat treatment, the winding becomes thick with the adjacent ones Materials bonded and hardened after prolonged exposure to heat.

Mit diesem erfindungqemäßen Isoliersystem ist es erstmals möglich die Bildung von Luftkamiern bei flüssigkeitsgekühlten Spulen zu vermeiden und eine gute Durchtränkung der Isolation mit Isolierflüssigkeit z. B. Trafo- oder Silikonöl sicherzustellen. Nach der Erfindung können die einzelnen Wicklungslagen, über die dazwischen angeordnete Lqenisolation und die anliegenden Flächen der Wickelleiter, in radialer Richtung miteinander verklebt und verfestigt werden.With this insulation system according to the invention, it is possible for the first time to avoid the formation of air chambers in liquid-cooled coils and a good impregnation of the insulation with insulating liquid z. B. transformer or silicone oil to ensure. According to the invention, the individual winding layers over which Lqenisolierung arranged in between and the adjacent surfaces of the winding conductors, are glued together in the radial direction and solidified.

Nach einer Ausgestaltung der Brfindung sind als Lageniaolation mehrere übereindergeschichtete punktweise harzbeschichtete Isolierbänder vorgesehen. Als Lageniaolation zwischen zwei Wicklungslagen werden ebenfalls punktweise harzbeschichtete, in mehreren Lagen übereinander gewickelte Isolierfolien verwendet, die mit der harzbeschichteten Isolation der Wickelleiter beim nachfolgenden Wärmeprozeß verkleben und eine kraft schlüssige feste Verbindung zwischen den Wicklungslagen und in achsialer Richtung der Spule ergeben.According to one embodiment of the invention, there are several layers of insulation Provided over one another layered point-wise resin-coated insulating tapes. as Layer insulation between two winding layers are also point-wise resin-coated, Insulating foils wrapped in several layers on top of each other are used, which are coated with the resin Glue insulation of the winding conductor in the subsequent heating process and a force coherent fixed connection between the winding layers and in the axial direction the coil.

Nach einem weiteren Merkmal der Erfindung sind zur Distanzierung von Wicklungslagen für Kühlkanäle Leisten aus vorzugsweise in gewellter Form hergestellten Isolierstoffen vorgesehen. Sind zur Verbesserung der Kühlung zwischen zwei Wicklungslagen Kühlkanäle vorgesehen, dann werden zur Distanzierung der beiden Wicklungslqen, zwischen diese, Leisten aus Isolierstoffe eingelegt. Diese der Abstandhaltung dienenden Teile aus Isolierstoff verkleben bei dem bereits mehrfach erwähnten Wärmeprozeß mit den harzbeschichteten Leiterisolationen der anliegenden Wicklungslagen, wodurch eine kraft schlüssige Verbindung von einer Wicklungslage zur anderen erreicht wird.According to a further feature of the invention are for distancing Winding layers for cooling channels strips made of preferably corrugated form Insulation materials provided. Are to improve the cooling between two winding layers Cooling channels are provided, then for distancing of both Winding lengths, inserted between these, strips of insulating material. This of keeping a distance Serving parts made of insulating material stick together in the heating process already mentioned several times with the resin-coated conductor insulation of the adjacent winding layers, whereby a positive connection from one winding layer to the other is achieved.

Das erfindungsgemäße Isoliersystem ergibt in seiner Gesamtheit über alle Wicklungslagen der Spule, in radialer und achsialer Richtung, eine feste, kraftschlüssige Verbindung, die den im Betrieb oder bei Netzkurzschlüssen auftretenden mechanischen Beanspruchungen entgegenwirkt. Dar erfindungsgemäße Isoliersystem erlaubt auch eine vollständige Durchtränkung (Imprägnierung) mit Isolierflüssigkeit, wodurch gewährleistet ist, daß auch die auftretenden elektrischen Spannungsbeanspruchungen sicher beherrscht werden.The insulation system according to the invention results in its entirety over all winding layers of the coil, in the radial and axial direction, a fixed, non-positive connection Connection that prevents the mechanical Counteracts stresses. The insulation system according to the invention also allows one complete soaking (impregnation) with insulating liquid, which ensures is that the electrical voltage stresses that occur are also safely mastered will.

An Hand von in der Zeichnung dargestellten Ausführungsbeispielen wird die Erfindung näher erläutert. Fig. 1 und 2 zeigt Leiter mit den Isolierbändern, Fig. 3 und 4 je zwei Lagen von Leitern und Fig. 5 und 6 die Leiter im Isoliersystem.On the basis of the exemplary embodiments shown in the drawing the invention explained in more detail. Fig. 1 and 2 shows conductors with the insulating tapes, 3 and 4 each have two layers of conductors and FIGS. 5 and 6 the conductors in the insulation system.

Fig. 1 zeigt einen Rundleiter 1, der mit Isoliert bändern 2, die punktweise mit Harz 3 im B-Zustand bedruckt ind, umspannen ist. Fig. 2 zeigt einen rechteckigen Leiter 1, der mit Isolierbändern 2, die punktweise mit Harz 3 im B-Zustand bedruckt sind, umaponnen ist.Fig. 1 shows a round conductor 1, the strips with insulating 2, the point by point is printed with resin 3 in B-stage ind, encircle. Fig. 2 shows a rectangular one Head 1, with insulating tapes 2, which are printed in dots with resin 3 in the B-state are umaponnen.

Fig. 3 zeigt eng anliegend, aufgewickelte Rundleiter 1, die mit punktweise harzbeschichteten Isolierbändern 2 umsponnen sind und beim nach folgenden Wärmeprozeß untereinander verkleben.Fig. 3 shows tightly fitting, wound round conductors 1, which with pointwise resin-coated insulating tapes 2 are wound and after the following heating process glue together.

Fig. 4 zeigt eng anliegend aufgewickelte Leiter 1 mit rechteckigem Querschnitt, die mit punktweise harzbeschichteten Isolierbändern 2 umsponnen sind und beim nachfolgenden Wärmeprozeß untereinander verkleben.Fig. 4 shows tightly wound conductor 1 with a rectangular Cross-section, which are wound with insulating tapes 2 coated with resin at points and stick together during the subsequent heating process.

Fig. 5 zeigt zwei Wicklungslagen aus Rundleitern 1, die mit harzbeschichteten Isolierbändern 2 umsponnen sind und mit dazwischenliegender Lagenisolation, die aus in mehreren Lagen aufgewickelten, punktweise mit Harz 4 im B-Zustand bedruckten Isolierfolien 3 besteht. Beim nachfolgenden Wärmeprozeß verkleben die Rundleiter 1 der einzelnen Wicklungslagen untereinander und mit den Isolierfolien 3 der Lagenisolation, wodurch auch eine kraftschlüssige Verbindung zwischen beiden Wicklungslagen entsteht.Fig. 5 shows two winding layers of round conductors 1, which are coated with resin Insulating tapes 2 are wound and with intervening layer insulation that made of wound in several layers, printed point by point with resin 4 in the B-state Insulating foils 3 consists. In the subsequent heating process, the round conductors stick together 1 of the individual winding layers with each other and with the insulating foils 3 of the layer insulation, which also creates a non-positive connection between the two winding layers.

Fig. 6 zeigt zwei Wicklungslagen aus rechteckigen Leitern 1, die mit harzbeschichteten Isolierbändern 2 umsponnen sind und mit dazwischenliegender Lagenisolation, die aus mehreren Lagen aufgewickelten, punktweise mit Harz 4 im B-Zustand bedruckten Isolierfolien 3 besteht. Beim nachfolgenden Wärmeprozeß verkleben die Leiter 1 der einzelnen Wicklungslagen untereinander und mit den Isolierfolien 3 der Lagonisolation, wodurch eine kraftschlüssige Verbindung zwischen beiden Wicklungslagen entsteht.Fig. 6 shows two winding layers of rectangular conductors 1, which with resin-coated insulating tapes 2 are wound and with interposed layer insulation, those wound from several layers, pointwise with resin 4 im B-state printed insulating film 3 consists. Stick together during the subsequent heating process the conductors 1 of the individual winding layers with one another and with the insulating foils 3 of the Lagon Isolation, creating a non-positive connection between the two winding layers arises.

Claims (3)

Patentansprüche 1. Isoliersystem für Lagenwicklungen von insbesondere flüssigkeitsgekühlten Transformatoren und Drosselspulen, wobei die Leiter rechteckigen oder runden Querschnitt aufweisen, dadurch gekennzeichnet, daß diese Leiter mit mindestens einem punktweise harzbeschichteten Isolierband, das aus Isolierpapier, Preßspan od. dgl. und einem unausgehärteten Klebeharz besteht, umsponnen sind und daß das Klebeharz bei der anschließenden Wärmebehandlung der Wicklung dickflüssig mit den anliqenden Materialien verklebt und nach längerer Wärmeeinwirkung aushärtet. Claims 1. Insulation system for layer windings in particular liquid-cooled transformers and reactors, the conductors being rectangular or have round cross-section, characterized in that these conductors with at least one point-wise resin-coated insulating tape made of insulating paper, Pressboard or the like and an uncured adhesive resin, are wound and that the adhesive resin becomes viscous during the subsequent heat treatment of the winding glued to the adjacent materials and hardened after prolonged exposure to heat. 2. Isoliersystem nach Anspruch 1, dadurch gekennzeichnet, daD als Lagenisolation mehrere übereinandergeschichtete punktweise harzbeschichtete Isolierbänder vorgesehen sind. 2. Isolation system according to claim 1, characterized in that daD as Layer insulation several layered, point-wise, resin-coated insulating tapes are provided. 3. Isoliersystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zur Distanzierung von Wicklungslagen für Kühlkanäle Leisten aus vorzugsweise in gewellter Form hergestellten Isolierstoffen vorgesehen sind. 3. Insulation system according to claim 1 or 2, characterized in that that for the distancing of winding layers for cooling channels strips from preferably Insulating materials produced in corrugated form are provided.
DE19843422746 1983-06-28 1984-06-19 Insulating system for layer windings Withdrawn DE3422746A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0236083A AT378279B (en) 1983-06-28 1983-06-28 INSULATION ARRANGEMENT FOR LAYER DEVELOPMENTS IN COILS OF LIQUID-COOLED TRANSFORMERS AND THROTTLES

Publications (1)

Publication Number Publication Date
DE3422746A1 true DE3422746A1 (en) 1985-01-03

Family

ID=3532907

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843422746 Withdrawn DE3422746A1 (en) 1983-06-28 1984-06-19 Insulating system for layer windings

Country Status (5)

Country Link
JP (1) JPS6068609A (en)
AT (1) AT378279B (en)
CH (1) CH664844A5 (en)
DE (1) DE3422746A1 (en)
SE (1) SE461753B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738410A1 (en) * 1987-11-12 1989-05-24 Ceag Licht & Strom Coil for a transformer or repeating coil
DE19639152A1 (en) * 1996-09-24 1998-04-02 Vem Elektroantriebe Gmbh Tape for making insulation for rotating electric high voltage (HV) machines
DE19703161A1 (en) * 1997-01-29 1998-07-30 Abb Patent Gmbh Winding wire e.g. for oil transformers
EP1096510A2 (en) * 1999-10-27 2001-05-02 Alcatel Electrical conductor with a rectangular or square cross-section

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0690066B2 (en) * 1989-08-02 1994-11-14 鹿島建設株式会社 Measuring method of concrete crown
EP4386787A1 (en) * 2022-12-13 2024-06-19 Hitachi Energy Ltd Winding assembly for a transformer and method for manufacturing a winding assembly for a transformer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH403068A (en) * 1962-05-22 1965-11-30 Liebknecht Transformat Method of solidifying windings for high voltage transformers, reactors and instrument transformers

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
DE1488226B2 (en) * 1964-11-20 1970-03-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Frontal winding edge insulation for cylindrical windings
DE1514231C3 (en) * 1965-10-29 1974-08-22 Messwandler-Bau Gmbh, 8600 Bamberg High-voltage multilayer winding encased with thermoset insulating compound, especially for voltage converters
DE2854973A1 (en) * 1978-12-20 1980-07-10 Vogt Gmbh & Co Kg METHOD FOR PRODUCING INSULATION LAYERS ON COILS, TRANSFORMERS OR THE LIKE.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH403068A (en) * 1962-05-22 1965-11-30 Liebknecht Transformat Method of solidifying windings for high voltage transformers, reactors and instrument transformers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Anm. S 26935 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738410A1 (en) * 1987-11-12 1989-05-24 Ceag Licht & Strom Coil for a transformer or repeating coil
DE19639152A1 (en) * 1996-09-24 1998-04-02 Vem Elektroantriebe Gmbh Tape for making insulation for rotating electric high voltage (HV) machines
DE19639152C2 (en) * 1996-09-24 1999-10-28 Vem Elektroantriebe Gmbh Tape for the production of the insulation of molded coils for high-voltage rotating electrical machines and method for producing this insulation
DE19703161A1 (en) * 1997-01-29 1998-07-30 Abb Patent Gmbh Winding wire e.g. for oil transformers
EP1096510A2 (en) * 1999-10-27 2001-05-02 Alcatel Electrical conductor with a rectangular or square cross-section
DE19951709A1 (en) * 1999-10-27 2001-05-03 Alcatel Sa Electrical conductor with a rectangular or quadratic cross section
EP1096510A3 (en) * 1999-10-27 2002-05-15 Nexans Electrical conductor with a rectangular or square cross-section

Also Published As

Publication number Publication date
ATA236083A (en) 1984-11-15
SE8403434L (en) 1984-12-29
JPS6068609A (en) 1985-04-19
SE461753B (en) 1990-03-19
AT378279B (en) 1985-07-10
CH664844A5 (en) 1988-03-31
SE8403434D0 (en) 1984-06-27

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