EP0058905A1 - Transformer or inductance cooled by insulating liquid, method and device for manufacturing them - Google Patents

Transformer or inductance cooled by insulating liquid, method and device for manufacturing them Download PDF

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Publication number
EP0058905A1
EP0058905A1 EP82101098A EP82101098A EP0058905A1 EP 0058905 A1 EP0058905 A1 EP 0058905A1 EP 82101098 A EP82101098 A EP 82101098A EP 82101098 A EP82101098 A EP 82101098A EP 0058905 A1 EP0058905 A1 EP 0058905A1
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EP
European Patent Office
Prior art keywords
winding
transformer
windings
band
shaft
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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.)
Granted
Application number
EP82101098A
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German (de)
French (fr)
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EP0058905B1 (en
Inventor
Bertil Dipl.-Ing. Moritz
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ABB Norden Holding AB
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ASEA AB
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus 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
    • H01F41/02—Apparatus 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
    • H01F41/04—Apparatus 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
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to a transformer cooled with insulating liquid or a correspondingly cooled choke according to the preamble of claim 1, a manufacturing method for the transformer or the choke and an arrangement for carrying out such a method.
  • filling is required in order to obtain the desired funnel-shaped shape at the axial winding ends. It is desirable, among other things, for dielectric reasons that this filling is made of an electrically insulating material. There such a material has poor thermal conductivity, the filling must lie in thermal planes of symmetry, ie either in the middle of the cooling channels or in the middle between two adjacent cooling channels, so that heat conduction in the radial direction is not hindered.
  • the invention has for its object to develop a transformer or a choke of the type mentioned, in which the problem shown in the application of filler in the axial end regions of the winding is solved in a simple manner.
  • the invention is based on the idea of integrating the filler mentioned at the outset into the cooling channel elements.
  • the cooling duct element is preferably made from an initially flat, rectangular compression washer, which is provided on one broad side with such a profile that the washer in the areas along two opposite parallel narrow sides has an increasing thickness towards these narrow sides, which is so dimensioned that the edge sections of the conductor strip get the desired bent shape.
  • the cooling duct elements are preferably produced by means of a sawing machine which works with a plurality of saw blades with two different diameters.
  • the saw blades are arranged alternately with the two existing diameters coaxially next to one another on a shaft which can be raised and lowered in relation to a support plane on which the insulating material disks for the cooling channel elements are advanced.
  • the height of the shaft is controlled depending on the position of the insulating material disc on the support plane. This control is preferably carried out using a processor.
  • the profile of the cooling channel element can be changed as desired and can be adapted to all desired shapes. When winding the winding, one only needs to take into account the sequence of the cooling channel elements in order to obtain the desired shape of the winding.
  • Figure 1 shows part of a transformer core with leg 1 and upper and lower yoke 2 and 3. Concentrically around the leg 1, an inner winding 4 and an outer winding 5 are arranged.
  • the windings consist of aluminum or copper foil 6 or 7 wound in many turns, the thickness of which can be between 0.01 and 3 mm. Between the turns is a film of suitable insulating material, for example polyethylene glycol terephthalate, the thickness of which can be, for example, between 0.01 and 0.1 mm.
  • the inner winding 4 is wound on a winding cylinder 8, which is made, for example, of fiberglass-reinforced polyester or metallic material, such as Aluminum.
  • the outer winding 5 is wound on the inner winding with an intermediate insulation gap in which ribs 9 made of pressboard, bakelite or glass fiber reinforced polyester are arranged parallel to the axis of the windings.
  • the iron core of the transformer with the windings is in one with insulating liquid, e.g. Oil, filled transformer tank arranged.
  • the windings are cooled in that the insulating liquid circulates through cooling channels in the windings, which are formed by cooling channel elements which are arranged between two adjacent turns of the conductor strip at different radial distances from the geometric axis of the windings. In Figure 1, only the cooling channel elements 10 to 14 are shown in the outer winding 5.
  • FIGS 2 to 5 show the structure of the cooling duct element - 13.
  • the remaining cooling duct elements in the outer winding are constructed in the same way.
  • the cooling duct element 13 shown is produced from a rectangular, originally flat clamping chip with a thickness h of, for example, 8 mm, a width of, for example, 0.5 m and a length which has at least the width of the conductor foil, for example 2 m.
  • One broad side of the press washer is worked on a profile, e.g. sawn that the disk gets a thickness increasing towards its two narrow sides 15, 16.
  • Parallel grooves 17 are formed on both broad sides of the disk and form cooling channels.
  • the grooves 17 on the two broad sides of the disk lie exactly opposite one another in pairs and extend from one narrow side 15, 16 of the disk to the other.
  • the thicker edge regions of the elements are frayed by the provision of continuous grooves 20 at the ends of each second connecting piece 19. These edge areas are also softened by pushing them through softening rollers, after which they can easily assume the shape shown in FIG.
  • FIGS. 6 and 7 schematically show a saw for sawing cooling duct elements of the type shown in FIGS. 2 to 5.
  • the saw has a fixed stand with a horizontal stand part 21 and a vertical stand part 22 arranged thereon.
  • the horizontal stand part 21 there are several Support rollers 23 are mounted, on which the insulating disks provided for the production of cooling duct elements are advanced during sawing.
  • the saw is provided with a large number of sawblades 24, '25, have the two different diameters.
  • the saw blades are fastened coaxially next to one another on a shaft 26, on which a pulley 27 is also seated, via which the shaft is driven by a motor 29 by means of a V-belt 28.
  • the one of two diameters Saw blades are mounted alternately on the shaft 26, so that adjacent saw blades 24, 25 always have different diameters.
  • the shaft 26 is mounted in a holder which is vertically displaceable on the vertical stand part 22.
  • This holder comprises two vertical supports 30, 31 and a sheet 32 holding the supports together.
  • Each support 30, 31 carries on one side one of the bearings for the shaft 26 with the saw blades.
  • On its other side, each support is provided with a round shaft 33 or 34 which extends along the associated support and is fixedly attached to this support.
  • These shafts are supported at their two ends in ball bushings 35, 36 and 37, 38, which are fixed to the vertical stand part 22.
  • the movable plate 32 is connected via a set screw 39 to a disk motor 40, which is controlled by connecting lines 41 by a processor in such a way that the height of the saw blades changes automatically in a predetermined manner depending on the position of the insulating material disk to be processed on the support rollers 23 becomes.
  • a processor in which the shaft with the saw blades can be raised and lowered in the manner mentioned, the profile of the cooling duct elements can be changed as desired and adapted to the customer's requirements. This makes it possible to obtain the correct shape for a transformer winding with bent-out end sections in a relatively simple manner.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Die Erfindung betrifft einen mit Isolierflüssigkeit gekühlten Transformator oder eine entsprechend gekühlte Drossel mit wenigstens einer Wicklung (5) aus band- oder folieförmigem Leitermaterial. Um die Stromverdrängung im Leiterband (7) zu reduzieren, ist das Band so geformt, dass es in seinen Randbereichen einer doppeltgebogenen Fläche folgt. Die Wicklung enthält mindestens ein Kühlkanalelement (13) zwischen zwei benachbarten Windungen des Bandes. Das Kühlkanalelement (13) hat eine in Richtung auf die axialen Endflächen der Wicklung zunehmende Dicke. Die Dickenzunahme ist derart bemessen, dass die Wicklung (5) eine im Hinblick auf ihre elektrischen Eigenschaften zweckmässige Abbiegung an ihren axialen Enden erhält. Das Kühlkanalelement kann aus einer Isoliermaterialsheibe durch Profilsägen mittels einer prozessorgesteuerten Säge hergestellt werden. Die Säge hat mehrere Sägeblätter, die auf einer Welle, die gehoben und gesenkt werden kann, festgespannt sind.The invention relates to a transformer cooled with insulating liquid or a correspondingly cooled choke with at least one winding (5) made of strip or foil-shaped conductor material. In order to reduce the current displacement in the conductor strip (7), the strip is shaped so that it follows a double-curved surface in its edge regions. The winding contains at least one cooling channel element (13) between two adjacent turns of the band. The cooling channel element (13) has an increasing thickness in the direction of the axial end faces of the winding. The increase in thickness is such that the winding (5) is given a bend at its axial ends that is expedient in terms of its electrical properties. The cooling duct element can be produced from an insulating material disc by means of profile saws using a processor-controlled saw. The saw has several saw blades that are clamped on a shaft that can be raised and lowered.

Description

Die Erfindung betrifft einen mit Isolierflüssigkeit gekühlten Transformator oder entsprechend gekühlte Drossel gemäß dem Oberbegriff des Anspruches 1, ein Herstellungsverfahren für den Transformator oder die Drossel und eine Anordnung zur Durchführung eines solchen Verfahrens.The invention relates to a transformer cooled with insulating liquid or a correspondingly cooled choke according to the preamble of claim 1, a manufacturing method for the transformer or the choke and an arrangement for carrying out such a method.

In Transformatoren und Drosseln mit Band- oder Foliewicklungen kann eine starke Stromverdrängung zu den Rändern des Bandes hin auftreten, die einerseits hohe Zusatzverluste und andererseits eine starke örtliche Erwärmung an den Rändern des Bandes verursacht. Durch die DE-OS 30 29 416 ist es bereits bekannt, die Stromverdrängung im Leiterband dadurch zu reduzieren, daß man das Band so formt, daß es in seinen Randbereichen einer doppeltgebogenen Fläche folgt. Dabei erzielt man das beste Resultat, wenn die Form des doppeltgebogenen Leiterbandes während des Wickelvorganges in bestimmter Weise variiert wird. Der radiale Abstand des Leiterbandes von der geometrischen Achse der Wicklung varriert bei solchen Wicklungen in achsialer Richtung und ist, zumindest für den radial äußeren Teil der Wicklung, an den achsialen Wicklungsenden am größten. Bei einer gleichmäßig dicken Metallfolie ist somit eine Ausfüllung erforderlich, um an den axialen Wicklungsenden die gewünschte trichterförmige Form zu erhalten. Es ist unter anderem aus dielektrischen Gründen wünschenswert, daß diese Ausfüllung aus elektrisch isolierendem Material besteht. Da ein solches Material eine schlechte Wärmeleitfähigkeit hat, muß die Ausfüllung in thermischen Symmetrieebenen liegen, d.h. entweder in der Mitte der Kühlkanäle oder in der Mitte zwischen zwei benachbarten Kühlkanälen, so daß die Wärmeleitung in radialer Richtung nicht behindert wird.In transformers and chokes with strip or foil windings, a strong current displacement to the edges of the strip can occur, which on the one hand causes high additional losses and on the other hand causes strong local heating at the edges of the strip. From DE-OS 30 29 416 it is already known to reduce the current displacement in the conductor strip by shaping the strip so that it follows a double-curved surface in its edge regions. The best result is achieved if the shape of the double-bent conductor strip is varied in a certain way during the winding process. The radial distance of the conductor strip from the geometric axis of the winding varies in the axial direction in the case of such windings and, at least for the radially outer part of the winding, is greatest at the axial winding ends. In the case of a uniformly thick metal foil, filling is required in order to obtain the desired funnel-shaped shape at the axial winding ends. It is desirable, among other things, for dielectric reasons that this filling is made of an electrically insulating material. There such a material has poor thermal conductivity, the filling must lie in thermal planes of symmetry, ie either in the middle of the cooling channels or in the middle between two adjacent cooling channels, so that heat conduction in the radial direction is not hindered.

Bei Wicklungen mit Kühlkanalelementen der an sich vorteilhaften Ausführung, die aus einer gleichmäßig dicken, biegsamen Isoliermaterialscheibe besteht, in der auf beiden Seiten Nuten für die Kühlflüssigkeitszirkulation eingearbeitet sind (Europäische Patentanmeldung 81 10 3568.2) ist es jedoch schwer, im Anschluß an die Kühlkanäle separate Füllmittel in der oben genannten Art anzubringen. Das Einlegen eines separaten Füllmittels verursacht ganz allgemein Probleme bei der Plazierung des Füllmittels, da die Lage des Füllmittels sehr präzise sein muß. Ein solches Einlegen erfordert einen hohen handwerklichen Aufwand, der zu hohen Herstellungskosten führt.In the case of windings with cooling channel elements of the advantageous design, which consists of a uniformly thick, flexible insulating material disk, in which grooves for the cooling liquid circulation are incorporated on both sides (European patent application 81 10 3568.2), it is difficult, however, after the cooling channels separate fillers to be attached in the manner mentioned above. The insertion of a separate filler generally causes problems when placing the filler, since the position of the filler must be very precise. Such insertion requires a high level of manual work, which leads to high manufacturing costs.

Der Erfindung liegt die Aufgabe zugrunde, einen Transformator oder eine Drossel der eingangs genannten Art zu entwickeln, bei dem das aufgezeigte Problem bei der Anbringung von Füllmittel in den axialen Endbereichen der Wicklung in einfacher Weise gelöst ist.The invention has for its object to develop a transformer or a choke of the type mentioned, in which the problem shown in the application of filler in the axial end regions of the winding is solved in a simple manner.

Zur Lösung dieser Aufgabe wird ein Transformator oder eine Drossel nach dem Oberbegriff des Anspruches 1 vorgeschlagen, der/die die im kennzeichnenden Teil des Anspruches 1 genannten Merkmale hat.To solve this problem, a transformer or a choke is proposed according to the preamble of claim 1, which has the features mentioned in the characterizing part of claim 1.

Vorteilhafte Weiterbildungen des Transformators oder der Drossel sind in den Ansprüchen 2 und 3 genannt. Ein Verfahren zur Herstellung eines Transformators oder einer Drossel gemäß der Erfindung ist erfindungsgemäß durch die im Anspruch 4 genannten Merkmale gekennzeichnet.Advantageous further developments of the transformer or the choke are mentioned in claims 2 and 3. A method for producing a transformer or a choke according to the invention is characterized according to the invention by the features mentioned in claim 4.

Eine Anordnung zur Durchführung dieses Verfahrens ist durch die in den Ansprüchen 5 und 6 genannten Merkmale gekennzeichnet.An arrangement for performing this method is characterized by the features mentioned in claims 5 and 6.

Die Erfindung beruht auf der Idee, das eingangs genannte Füllmittel in die Kühlkanalelemente zu integrieren.The invention is based on the idea of integrating the filler mentioned at the outset into the cooling channel elements.

Das Kühlkanalelement wird vorzugsweise aus einer zunächst ebenen, rechteckigen Preßspannscheibe hergestellt, die auf ihrer einen Breitseite mit einem solchen Profil versehen wird, daß die Scheibe in den Bereichen längs zweier gegenüberliegender paralleler Schmalseiten eine in Richtung auf diese Schmalseiten zunehmende Dicke hat, die so bemessen ist, daß die Randabschnitte des Leiterbandes die gewünschte herausgebogene Form bekommen.The cooling duct element is preferably made from an initially flat, rectangular compression washer, which is provided on one broad side with such a profile that the washer in the areas along two opposite parallel narrow sides has an increasing thickness towards these narrow sides, which is so dimensioned that the edge sections of the conductor strip get the desired bent shape.

Das Herstellen der Kühlkanalelemente erfolgt vorzugsweise mittels einer Sägemaschine, die mit mehreren Sägeblättern mit zwei verschiedenen Durchmessern arbeitet. Die Sägeblätter sind abwechselnd mit den beiden vorkommenden Durchmessern koaxial nebeneinander auf einer Welle angeordnet, die im Verhältnis zu einer Stützebene, auf der die Isoliermaterialscheiben für die Kühlkanalelemente vorgeschoben werden, gehoben und gesenkt werden kann. Die Höhenlage der Welle wird dabei in Abhängigkeit von der Lage der Isoliermaterialscheibe auf der Stützebene gesteuert. Diese Steuerung erfolgt vorzugsweisemit Hilfe eines Prozessors. Durch dieses Verfahren kann das Profil des Kühlkanalelementes beliebig geändert werden und allen gewünschten Formen angepaßt werden. Beim Wickeln der Wicklung braucht man dann nur die Reihenfolge der Kühlkanalelemente zu berücksichtigen um die gewünschte Form der Wicklung zu erhalten.The cooling duct elements are preferably produced by means of a sawing machine which works with a plurality of saw blades with two different diameters. The saw blades are arranged alternately with the two existing diameters coaxially next to one another on a shaft which can be raised and lowered in relation to a support plane on which the insulating material disks for the cooling channel elements are advanced. The height of the shaft is controlled depending on the position of the insulating material disc on the support plane. This control is preferably carried out using a processor. With this method, the profile of the cooling channel element can be changed as desired and can be adapted to all desired shapes. When winding the winding, one only needs to take into account the sequence of the cooling channel elements in order to obtain the desired shape of the winding.

Anhand der in den Figuren gezeigten Ausführungsbeispiele soll die Erfindung näher erläutert werden. Es zeigen

  • Figur 1 schematisch einen Schnitt durch einen Teil eines Transformators gemäß der Erfindung,
  • Figur 2 in Seitenansicht ein Ausführungsbeispiel eines Kühlkanalelementes für einen Transformator gemäß Figur 1,
  • -Figur 3 einen Schnitt durch das Kühlkanalelement längs der Linie III - III in Figur 2,
  • Figur 4 einen Schnitt durch das Kühlkanalelement längs der Linie IV - IV in Figur 2,
  • Figur 5 in Seitenansicht das Kühlkanalelement nach Figur 2 nach dem Weichmachen seiner dickeren Randbereiche,
  • Figur 6 schematisch in Seitenansicht eine Sägemaschine zum Sägen von Kühlkanalelementen nach Art der Figuren 2 bis 5,
  • Figur 7 eine Vorderansicht des oberen Teils der Sägemaschine gemäß Figur 6.
The invention will be explained in more detail with reference to the exemplary embodiments shown in the figures. Show it
  • FIG. 1 shows schematically a section through part of a transformer according to the invention,
  • FIG. 2 shows a side view of an exemplary embodiment of a cooling duct element for a transformer according to FIG. 1,
  • 3 shows a section through the cooling duct element along the line III-III in FIG. 2,
  • FIG. 4 shows a section through the cooling duct element along the line IV-IV in FIG. 2,
  • FIG. 5 shows a side view of the cooling duct element according to FIG. 2 after its thicker edge areas have been softened,
  • FIG. 6 schematically, in side view, a sawing machine for sawing cooling duct elements in the manner of FIGS. 2 to 5,
  • FIG. 7 shows a front view of the upper part of the sawing machine according to FIG. 6.

Figur 1 zeigt einen Teil eines Transformatorkerns mit Schenkel 1 sowie oberem und unterem Joch 2 bzw. 3. Konzentrisch um den Schenkel 1 sind eine Innenwicklung 4 und eine Außenwicklung 5 angeordnet. Die Wicklungen bestehen aus in vielen Windungen gewickelter Aluminium- oder Kupferfolie 6 bzw. 7, deren Dicke zwischen 0,01 und 3 mm liegen kann. Zwischen den Windungen liegt ein Film aus geeignetem Isoliermaterial, beispielsweise Polyäthylenglykolterephtalat, dessen Dicke beispielsweise zwischen 0,01 und 0,1 mm liegen kann. Die Innenwicklung 4 ist auf einen Wicklungszylinder 8 gewickelt, der beispielsweise aus glasfaserarmiertem Polyester oder metallischem Material, wie z.B. Aluminium,bestehen kann. Die Außenwicklung 5 ist auf die Innenwicklung mit einem zwischenliegenden Isolationsspalt gewickelt, in dem Rippen 9 aus Preßspan, Bakelit oder glasfaserarmiertem Polyester parallel zur Achse der Wicklungen angeordnet sind. Der Eisenkern des Transformators mit den Wicklungen ist in einem mit Isolierflüssigkeit, z.B. Öl, gefüllten Transformatorkessel angeordnet. Die Wicklungen werden dadurch gekühlt, daß die Isolierflüssigkeit durch Kühlkanäle in den Wicklungen zirkuliert, die von Kühlkanalelementen gebildet werden, welche zwischen je zwei benachbarten Windungen des Leiterbandes in verschiedenen radialen Abständen von der geometrischen Achse der Wicklungen angeordnet sind. In Figur 1 werden nur die Kühlkanalelemente 10 bis 14 in der Außenwicklung 5 gezeigt.Figure 1 shows part of a transformer core with leg 1 and upper and lower yoke 2 and 3. Concentrically around the leg 1, an inner winding 4 and an outer winding 5 are arranged. The windings consist of aluminum or copper foil 6 or 7 wound in many turns, the thickness of which can be between 0.01 and 3 mm. Between the turns is a film of suitable insulating material, for example polyethylene glycol terephthalate, the thickness of which can be, for example, between 0.01 and 0.1 mm. The inner winding 4 is wound on a winding cylinder 8, which is made, for example, of fiberglass-reinforced polyester or metallic material, such as Aluminum. The outer winding 5 is wound on the inner winding with an intermediate insulation gap in which ribs 9 made of pressboard, bakelite or glass fiber reinforced polyester are arranged parallel to the axis of the windings. The iron core of the transformer with the windings is in one with insulating liquid, e.g. Oil, filled transformer tank arranged. The windings are cooled in that the insulating liquid circulates through cooling channels in the windings, which are formed by cooling channel elements which are arranged between two adjacent turns of the conductor strip at different radial distances from the geometric axis of the windings. In Figure 1, only the cooling channel elements 10 to 14 are shown in the outer winding 5.

Die Figuren 2 bis 5 zeigen den Aufbau des Kühlkanalelementes - 13. Die übrigen Kühlkanalelemente in der Außenwicklung sind in gleicher Weise aufgebaut. Das gezeigte Kühlkanalelement 13 ist hergestellt aus einer rechteckigen, ursprünglich ebenen Preßspanscheibe mit einer Dicke h von beispielsweise 8 mm, einer Breite von beispielsweise 0,5 m und einer Länge, die mindestens die Breite der Leiterfolie, beispielsweise 2 m, hat. Die eine Breitseite der Preßspanscheibe ist derart auf Profil gearbeitet, z.B. gesägt, daß die Scheibe eine nach ihren beiden Schmalseiten 15, 16 hin zunehmende Dicke bekommt. Auf beiden Breitseiten der Scheibe sind parallele Nuten 17 eingearbeitet, welche Kühlkanäle bilden. Die Nuten 17 auf den beiden Breitseiten der Scheibe liegen sich paarweise genau gegenüber und reichen von einer Schmalseite 15, 16 der Scheibe zur anderen. Das verbliebene Material an den Seiten der Nuten 17 bildet die Distanzelemente 18) während das verbliebene Material am Boden der Nuten die Verbindungsstücke 19 bildet. Um das Biegen der Kühlkanalelemente bei ihrer Anbringung in der Wicklung zu erleichtern, sind die dickeren Randbereiche der Elemente durch Anbringung von durchgehenden Nuten 20 an den Enden jedes zweiten Verbindungsstückes 19 aufgefranst. Diese Randbereiche werden außerdem dadurch weichgemacht, daß sie durch Weichmacherwalzen geschoben werden, wonach sie leicht die in Figur 5 gezeigte Form annehmen können.Figures 2 to 5 show the structure of the cooling duct element - 13. The remaining cooling duct elements in the outer winding are constructed in the same way. The cooling duct element 13 shown is produced from a rectangular, originally flat clamping chip with a thickness h of, for example, 8 mm, a width of, for example, 0.5 m and a length which has at least the width of the conductor foil, for example 2 m. One broad side of the press washer is worked on a profile, e.g. sawn that the disk gets a thickness increasing towards its two narrow sides 15, 16. Parallel grooves 17 are formed on both broad sides of the disk and form cooling channels. The grooves 17 on the two broad sides of the disk lie exactly opposite one another in pairs and extend from one narrow side 15, 16 of the disk to the other. The remaining material on the sides of the grooves 17 forms the spacer elements 18), while the remaining material on the bottom of the grooves forms the connecting pieces 19. In order to facilitate the bending of the cooling channel elements when they are installed in the winding, the thicker edge regions of the elements are frayed by the provision of continuous grooves 20 at the ends of each second connecting piece 19. These edge areas are also softened by pushing them through softening rollers, after which they can easily assume the shape shown in FIG.

Die Figuren 6 und 7 zeigen schematisch eine Säge zum Sägen von Kühlkanalelementen der in den Figuren 2 bis 5 gezeigten Art. Die Säge hat ein festes Stativ mit einem horizontalen Stativteil 21 und 'einem hierauf angeordneten vertikalen Stativteil 22. In dem horizontalen Stativteil 21 sind mehrere Stützrollen 23 gelagert, auf welchen die für die Herstellung von Kühlkanalelementen vorgesehenen Isolierscheiben beim Sägen vorgeschoben werden. Die Säge ist mit einer großen Anzahl von Sägeblättern 24,'25 versehen, die zwei verschiedene Durchmesser haben. Die Sägeblätter sind koaxial nebeneinander auf einer Welle 26 befestigt, auf der auch eine Riemenscheibe 27 sitzt, über die die Welle mittels eines Keilriemens 28 von einem Motor 29 angetrieben wird. Die einen von zwei Durchmessern aufweisender Sägeblätter sind abwechselnd auf der Welle 26 angebracht, so daß benachbarte Sägeblätter 24, 25 stets verschiedene Durchmesser haben. Die Welle 26 ist in einem auf dem vertikalen Stativteil 22 vertikal verschiebbaren Halter gelagert. Dieser Halter umfaßt zwei vertikale Träger 30, 31 und ein die Träger zusammenhaltendes Blech 32. Jeder Träger 30, 31 trägt an seiner einen Seite eines der Lager für die Welle 26 mit den Sägeblättern. An seiner anderen Seite ist jeder Träger mit einer runden Welle 33 bzw. 34 versehen, die sich längs des zugehörigen Trägers erstreckt und an diesem Träger fest fixiert ist. Diese Wellen sind an ihren beiden Enden in Kugelbuchsen 35, 36 bzw. 37, 38 gelagert, die an dem vertikalen Stativteil 22 fest fixiert sind.FIGS. 6 and 7 schematically show a saw for sawing cooling duct elements of the type shown in FIGS. 2 to 5. The saw has a fixed stand with a horizontal stand part 21 and a vertical stand part 22 arranged thereon. In the horizontal stand part 21 there are several Support rollers 23 are mounted, on which the insulating disks provided for the production of cooling duct elements are advanced during sawing. The saw is provided with a large number of sawblades 24, '25, have the two different diameters. The saw blades are fastened coaxially next to one another on a shaft 26, on which a pulley 27 is also seated, via which the shaft is driven by a motor 29 by means of a V-belt 28. The one of two diameters Saw blades are mounted alternately on the shaft 26, so that adjacent saw blades 24, 25 always have different diameters. The shaft 26 is mounted in a holder which is vertically displaceable on the vertical stand part 22. This holder comprises two vertical supports 30, 31 and a sheet 32 holding the supports together. Each support 30, 31 carries on one side one of the bearings for the shaft 26 with the saw blades. On its other side, each support is provided with a round shaft 33 or 34 which extends along the associated support and is fixedly attached to this support. These shafts are supported at their two ends in ball bushings 35, 36 and 37, 38, which are fixed to the vertical stand part 22.

Das bewegliche Blech 32 ist.über eine Stellschraube 39 mit einem Scheibenmotor 40 verbunden, der über Anschlußleitungen 41 durch einen Prozessor derart gesteuert wird, daß die Höhenlage der Sägeblätter in Abhängigkeit von der Lage der zu bearbeitenden Isoliermaterialscheibe auf den Stützrollen 23 automatisch auf vorbestimmte Weise geändert wird. Mit einer Säge, bei der die Welle mit den Sägeblättern in der,genannten Weise gehoben und gesenkt werden kann, kann das Profil der Kühlkanalelemente beliebig geändert und den Kundenwünschen angepaßt werden. Dadurch kann man auf verhältnismäßig einfache Weise die richtige Form für eine Transformatorwicklung mit herausgebogenen Endabschnitten erhalten.The movable plate 32 is connected via a set screw 39 to a disk motor 40, which is controlled by connecting lines 41 by a processor in such a way that the height of the saw blades changes automatically in a predetermined manner depending on the position of the insulating material disk to be processed on the support rollers 23 becomes. With a saw in which the shaft with the saw blades can be raised and lowered in the manner mentioned, the profile of the cooling duct elements can be changed as desired and adapted to the customer's requirements. This makes it possible to obtain the correct shape for a transformer winding with bent-out end sections in a relatively simple manner.

Claims (5)

1. Mit Isolierflüssigkeit gekühlter Transformator oder gekühlte Drossel, bestehend aus einem aus magnetischem Material hergestellten Kern mit mindestens einem Schenkel (1) und Jochen (2, 3), aus mindestens einer im wesentlichen konzentrisch auf dem Schenkel angeordneten Wicklung (5), die aus mehreren aufeinandergewickelten Windungen eines Bandes aufgebaut ist, das aus einer Metallfolie und einem wenigstens auf einer Seite der Metallfolie vorhandenen Isolierfilm zusammengesetzt ist, wobei das Band bei wenigstens einem Teil der Windungen so geformt ist, daß die Randbereiche des Bandes einen anderen Abstand von der geometrischen Achse der Wicklung haben als der mittlere Bereich des Bandes der betreffenden Windungen, und aus wenigstens einem Kühlkanalelement (13), das zwischen zwei aufeinanderfolgenden Windungen oder Teilen von Windungen des Bandes oder innerhalb der innersten Windung des Bandes der Wicklung angeordnet ist, wobei das Kühlkanalelement (13) mehrere miteinander verbundene langgestreckte, parallele und mit Abstand voneinander in seitlicher Richtung (Umfangsrichtung) angeordnete Distanzelemente (18) enthält, welche die beiden Windungen bzw. die Teile der Windungen des Bandes derart auf Abstand voneinander halten, daß zwischen diesen Windungen bzw. innerhalb der innersten Windung des Bandes Kanäle (17) zum Transport von Isolierflüssigkeit von der einen axialen Endfläche der Bandwicklung zur anderen gebildet werden, dadurch gekennzeichnet, daß das Distanzelement (18) des Kühlkanalelementes (13) eine in Richtung auf die axialen Endflächen der Wicklung zunehmende Dicke hat.1. With insulating liquid cooled transformer or choke, consisting of a core made of magnetic material with at least one leg (1) and yokes (2, 3), from at least one winding (5) arranged essentially concentrically on the leg, which consists of a plurality of coiled windings of a band is constructed, which is composed of a metal foil and an insulating film present on at least one side of the metal foil, the band being shaped in at least part of the windings so that the edge regions of the band have a different distance from the geometric axis of the winding have as the central region of the band of the windings in question, and of at least one cooling duct element (13) which is arranged between two successive windings or parts of windings of the band or within the innermost winding of the band of the winding, the cooling duct element (13 ) several interconnected lan stretched, parallel and spaced from each other in the lateral direction (circumferential direction) spacer elements (18) which keep the two turns or the parts of the turns of the tape at a distance from each other such that between these turns or within the innermost turn of the tape Channels (17) for transporting insulating liquid from one axial end face of the tape winding to the other are formed, characterized in that the spacer element (18) of the cooling channel element (13) has an increasing thickness in the direction of the axial end faces of the winding. 2. Transformator oder Drossel nach Anspruch 1, dadurch gekennzeichnet, daß die Distanzelemente (18) in seitlicher Richtung (Umfangsrichtung) durch Verbindungsstücke (19) miteinander verbunden sind, welche von beiden benachbar ten Windungen auf Abstand, und zwar vorzugsweise in der Mitte zwischen den beiden benachbarten Windungen angeordnet sind.2. Transformer or choke according to claim 1, characterized in that the spacer elements (18) in the lateral direction (circumferential direction) are connected to one another by connecting pieces (19) which are spaced from both adjacent windings, preferably in the middle are arranged between the two adjacent turns. 3. Transformator oder Drossel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Kühlkanalelement (13) aus einer biegsamen Isoliermaterialscheibe besteht, in die auf beiden Breitseiten Nuten (17) eingearbeitet sind, während das seitlich der.Nuten verbleibende Material die Distanzelemente (18) bildet und das am Boden der Nuten verbleibende Material die Verbindungsstücke (19) bildet.3. Transformer or choke according to claim 1 or 2, characterized in that the cooling duct element (13) consists of a flexible insulating material disk, into which grooves (17) are incorporated on both broad sides, while the material remaining on the side of the grooves is the spacer elements (18 ) forms and the material remaining at the bottom of the grooves forms the connecting pieces (19). 4. Verfahren für die Herstellung eines Transformators oder einer Drossel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Kühlkanalelemente (13) aus einer rechteckigen Preßspanscheibe dadurch hergestellt werden, daß die eine Breitseite der Scheibe derart, z.B. durch Sägen, mit einem Profil versehen wird, daß die Scheibe in den Bereichen längs zweier gegenüberliegender paralleler Schmalseiten eine in Richtung auf die genannten Schmalseiten zunehmende Dicke erhält, daß parallele Nuten (17) für Kühlkanäle, die sich von der einen bis zu der anderen der genannten Schmalseiten erstrecken, auf beiden Seiten der Scheibe eingearbeitet, z.B. eingesägt, werden und daß die beiden dickeren Randabschnitte der Scheibe durch mechanische Behandlung weichgemacht werden.4. A method for the manufacture of a transformer or a choke according to one of claims 1 to 3, characterized in that the cooling channel elements (13) are made from a rectangular press chipboard in that the one broad side of the disk such, e.g. by sawing, is provided with a profile that the disc in the areas along two opposite parallel narrow sides receives a thickness increasing in the direction of said narrow sides, that parallel grooves (17) for cooling channels, which vary from one to the other extend mentioned narrow sides, incorporated on both sides of the disc, for example sawn, and that the two thicker edge portions of the disc are softened by mechanical treatment. 5. Anordnung zur Durchführung des Verfahrens nach Anspruch 4, dadurch gekennzeichnet, daß auf einer Welle (26) mehrere zur Bearbeitung von Isoliermaterialscheiben zu Kühlkanalelementen vorgesehene Sägeblätter (24, 25) mit zwei verschiedenen Durchmessern abwechselnd koaxial nebeneinander angebracht sind, daß die Welle (26) im Verhältnis zu einer Stützebene, auf der die Isoliermaterialscheiben transportiert werden, gehoben und gesenkt werden kann, und daß Organe vorhanden sind zur automatischen Steuerung der Höhenlage der Welle (26) in vorbestimmter Weise in Abhängigkeit von der Lage der Isoliermaterialscheibe auf.der Stützebene. 6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß die Welle (26) mit den Sägeblättern (24, 25) in einem verschiebbar an einem Stativ angeordneten Halter (30, 31, 32) gelagert ist, der mit einer mittels eines Prozessors gesteuerten Stellschraube (39) verbunden ist.5. Arrangement for carrying out the method according to claim 4, characterized in that on a shaft (26) a plurality of saw blades (24, 25) provided with two different diameters for machining insulating material disks for cooling channel elements are alternately arranged coaxially next to one another in that the shaft (26 ) in relation to a support plane on which the insulating material disks are transported, can be raised and lowered, and that organs are provided for automatically controlling the height of the shaft (26) in a predetermined manner depending on the position of the insulating material disk on the support plane. 6. Arrangement according to claim 5, characterized in that the shaft (26) with the saw blades (24, 25) is mounted in a displaceably arranged on a tripod holder (30, 31, 32), which is controlled by a processor by means of an adjusting screw (39) is connected.
EP82101098A 1981-02-24 1982-02-15 Transformer or inductance cooled by insulating liquid, method and device for manufacturing them Expired EP0058905B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8101197 1981-02-24
SE8101197A SE428979B (en) 1981-02-24 1981-02-24 WITH INSULATED COOL TRANSFORMER OR REACTOR

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EP0058905A1 true EP0058905A1 (en) 1982-09-01
EP0058905B1 EP0058905B1 (en) 1984-10-17

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EP (1) EP0058905B1 (en)
JP (1) JPS57155711A (en)
CA (1) CA1182876A (en)
DE (1) DE3260979D1 (en)
NO (1) NO820539L (en)
SE (1) SE428979B (en)
ZA (1) ZA821169B (en)

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US6163241A (en) * 1999-08-31 2000-12-19 Stupak, Jr.; Joseph J. Coil and method for magnetizing an article
JP4728015B2 (en) * 2005-03-02 2011-07-20 鈴野化成株式会社 Stick-shaped cosmetic material feeding container
US9514878B2 (en) * 2013-11-22 2016-12-06 Tamura Corporation Coil and manufacturing method for same, and reactor

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DE2653315A1 (en) * 1976-10-29 1978-05-03 Bbc Brown Boveri & Cie INSULATION AND DISTANCE BODY FOR AXIAL INSULATION AND DISTANCING OF THE CONDUCTORS FROM COILS AND THE PROCESS FOR THE PRODUCTION THEREOF
DE2753055A1 (en) * 1977-11-28 1979-05-31 Siemens Ag PROCESS FOR BUILDING A SUPRAL CONDUCTING MAGNETIC WINDING
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Also Published As

Publication number Publication date
CA1182876A (en) 1985-02-19
SE8101197L (en) 1982-08-25
NO820539L (en) 1982-08-25
EP0058905B1 (en) 1984-10-17
US4477790A (en) 1984-10-16
ZA821169B (en) 1983-01-26
SE428979B (en) 1983-08-01
JPS57155711A (en) 1982-09-25
DE3260979D1 (en) 1984-11-22

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