EP0037500A1 - Bobbin for air-cooled coil - Google Patents

Bobbin for air-cooled coil Download PDF

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Publication number
EP0037500A1
EP0037500A1 EP81102127A EP81102127A EP0037500A1 EP 0037500 A1 EP0037500 A1 EP 0037500A1 EP 81102127 A EP81102127 A EP 81102127A EP 81102127 A EP81102127 A EP 81102127A EP 0037500 A1 EP0037500 A1 EP 0037500A1
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EP
European Patent Office
Prior art keywords
leg
plug
flanges
frame
bobbin
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.)
Granted
Application number
EP81102127A
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German (de)
French (fr)
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EP0037500B1 (en
Inventor
Harald Meffert
Rolf Pieper
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.)
W Meffert KG
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W Meffert KG
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
Priority claimed from DE19803010823 external-priority patent/DE3010823A1/en
Priority claimed from DE19818108092 external-priority patent/DE8108092U1/en
Application filed by W Meffert KG filed Critical W Meffert KG
Priority to AT81102127T priority Critical patent/ATE15420T1/en
Publication of EP0037500A1 publication Critical patent/EP0037500A1/en
Application granted granted Critical
Publication of EP0037500B1 publication Critical patent/EP0037500B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers

Definitions

  • the invention relates to a coil former for air-cooled electrical windings, for example of transformers, with supporting elements arranged axially parallel, which serve on the one hand as a holder for an iron core and on the other hand as a carrier for at least one inner and one outer winding, and with holding members delimiting the end elements on the end face.
  • One of the most common bobbins of this type consists of a square cylinder which merges into a collar-like flange on the two end faces, each of which extends from the closed outer surface at a right angle.
  • the cylinder encloses the iron countersinks and also serves as a carrier for the inner winding.
  • the outer winding is applied to rods which are arranged axially parallel between the flanges and engage with their ends in radial edge slots at the corners of the flanges.
  • This known bobbin has the considerable disadvantage that bobbins of different sizes also have to be produced for coils of different sizes in accordance with the requirements placed on them in terms of performance and other physical and technical properties. Even if the coils lying within a certain dimension range differ from one another only in a single dimension, that is to say only in length or width or height, a special coil former must be provided for each of these coils. Such bobbins can only be produced by pressing or injection molding, so that for each bobbin per size a separate form must be made, which requires considerable economic effort. In addition, with regard to the expected consumption of all available bobbin sizes within a certain period of time, i.e.
  • the cylinder carrying the inner winding has a closed outer surface, because this prevents sufficient air circulation, which is essential for dissipating the heat generated during operation of the coil.
  • the known coil former attempts are made to counter this disadvantage by using better quality material for the iron cores, but this results in a noticeable increase in production costs, particularly in the case of transformers of large dimensions.
  • these shell-side closed bobbins are very expensive, which has a cost-increasing effect if, due to the requirement for high temperature resistance, high-quality and therefore expensive materials, for example glass-fiber reinforced plastics, have to be used.
  • the present invention has for its object to provide an adjustable to different sizes bobbin, which can be produced easily and economically and good air circulation between enables the windings.
  • the coil body consists of releasably engageable plug elements with respect to each spatial direction.
  • the end-side holding members are designed as plug-in frames, in the recesses of which variable-length sets of supporting elements of the same length, such as profiled bars or spacer bars, can be used, and in that each plug-in frame has at least three, preferably four, length-adjustable legs. The ends of two adjoining legs each merge into an outwardly directed flange, the flanges being provided on the mutually facing sides of the paired plug-in frames with a U-shaped groove for the engagement of the spacer bars.
  • the bobbin according to the invention is distinguished from the conventional bobbins of this type in that it is constructed according to the modular principle and can be assembled by simply plugging individual elements into one another.
  • a plurality of differently sized bobbins can be produced by combining the frame corner parts of one and the same size required to form two plug-in frames with sets of leg connectors and supporting elements of different lengths.
  • the individual parts of the coil former according to the invention can be produced in a simple and relatively inexpensive manner by extrusion, stamping or pressing. The production of elaborate forms is not necessary.
  • the individual parts of the coil former according to the invention can be accommodated and packaged in a space-saving manner, which has an advantageous effect on storage and shipping.
  • a coil body 7 which consists of two size-adjustable plug frames 8 and 9, which are detachably connected to each other with the aid of four profile bars 10 engaging in the recesses 8a and 9a.
  • the profile bars 10 are provided with a curved outer side 10a; these roundings enable a precise and damage-free application of the inner winding 13.
  • the profile bar 10 has a length of the entire bar extending rectangular recess 10b, which serves as a form-fitting holder for a longitudinal edge of an iron core, not shown, with a rectangular cross-section.
  • the plug frame 8, 9 according to FIGS. 2 and 6 can be changed in length in both directions. It has four corner pieces, each corner piece having two leg sections 8g running at right angles to one another; 9g contains, which merge into an outwardly directed flange 8b, 9b.
  • the leg sections 8g, 9g are each provided with an edge slot 8h, 9h.
  • Two mutually associated leg sections 8g, 9g are connected by means of a rectangular bar 15, the ends of which are inserted into the edge slots 8h, 9h with a clamping effect.
  • the strips 15 can additionally be fixed at the connection points by means of adhesive. For symmetry reasons, strips 15 of the same length must, of course, always be inserted on the opposite, ie parallel, legs of the plug frame 8, 9. By inserting strips 15 of different lengths, the length of the plug-in frame 8, 9 can be changed to the appropriate extent in both dimensions.
  • Fig. 7 a modified way of connecting two corner pieces of a plug frame is shown.
  • the leg portions are provided with undercut slots 8g 8i into which the correspondingly shaped coupling heads 16a and 17a of connecting strips 1 6 and extension strips 17 can be inserted.
  • Such a positive connection has the advantage that exactly defined leg lengths can be produced without further aids.
  • the flanges 8b, 9b serve on the one hand as a lateral support zen for the windings 13, 14 and on the other hand as guide elements for the spacer bars 12.
  • the flanges 8b, 9b are in relation to the assembled bobbin 7 on the mutually facing sides of the plug frames 8, 9, each with a U-shaped groove 8f, 9f.
  • Each flange 8b, 9b has a slot 11 which runs parallel to its edges and penetrates the bottom of the groove 8f, 9f.
  • the spacer bars 12 have a square cross section and each have a continuous channel-shaped recess 12a on two opposite longitudinal sides.
  • the spacer rods 12 are inserted into the grooves 8f, 9f of the flanges 8b, 9b such that one of the two recesses 12a of the inner winding 13 and the other recess 12a of the outer winding 14 to be subsequently applied are turned.
  • the spacer bars 12 create an air-insulated cylindrical ring-shaped space, a so-called chimney, between the inner winding 13 and the outer winding 14, which is accessible from the outside on both ends of the bobbin 7 through trapezoidal windows 19, which are on the outside of the plug frame 8, 9 are each formed between two outwardly directed flanges 8b, 9b and the outer winding 14.
  • the warm air generated by the windings 13, 14 through which current flows can exit through these windows 19 and cold air can flow in from outside into the cylindrical space.
  • further ventilation channels are formed between the trough-shaped recesses 12a of the spacer bars 12 and the respectively adjacent windings 13 and 14, with which the slots 11 located in the flanges 8b, 9b are aligned on the end face.
  • a closed plug-in frame 8, 9 according to FIGS. 1 and 3 can also be used according to the invention.
  • the legs 8c, 9c are both on the inward-facing sides of each plug-in frame 8, 9 with U-shaped recesses 8d, 9d and on the mutually facing sides of the two associated plug-in frames 8, 9 with U-shaped recesses 8e, 9e provided.
  • These recesses also promote effective air circulation to dissipate the heat generated.
  • Such recesses can of course also be present on the coil former 7 according to FIG. 6.
  • the bobbin according to the invention is of course not limited to a square cross-sectional shape, although this is probably the most common.
  • 8 shows the spatial assignment of two flanges 18, which are connected to one another by a strip 15, of a twelve-sided plug-in frame. Analogously to the plug-in frame 8, 9 according to FIG. 2, the leg sections 18a starting from the flanges 18 each have two edge slots 18b for receiving the strips 15. The recesses 18c correspond to the recesses 8a.
  • Each flange 18 is provided with a U-shaped groove 18d.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

Dieser Spulenkörper ist nach dem Baukastenprinzip aufgebaut und läßt sich durch bloßes Ineinanderstecken von Einzelelementen zusammenfügen. Seine Größe ist sowohl in axialer Richtung als auch in den durch die Form des Steckrahmens (8, 9) vorgegebenen Schenkelrichtungen veränderbar. In verschiedenen Längenabstufungen ist eine Mehrzahl von Sätzen untereinander gleich langer Steckverbindungselemente in Form von Profilstäben (10) und Distanzstäben (12) einerseits und von die Schenkelabschnitte (8g, 9g) miteinander verbindenden Leisten (15) andererseits verfügbar. So lassen sich die in der einen oder anderen Dimension mehr oder weniger voneinander abweichenden Spulenkörper, die für in einem bestimmten Abmessungsbereich liegenden Spulen benötigt werden, allein dadurch bereitstellen, daß gleich große Rahmeneckteile, die aus den Flanschen (8b, 9b) und den Schenkelabschnitten (8g, 9g) bestehen, wahlweise mit verschiedenen Sätzen von Steckverbindungselementen kombiniert werden.This coil body is built on the modular principle and can be assembled by simply plugging individual elements together. Its size can be changed both in the axial direction and in the leg directions specified by the shape of the plug-in frame (8, 9). A plurality of sets of connector elements of equal length in the form of profile bars (10) and spacer bars (12) on the one hand and strips (15) connecting the leg sections (8g, 9g) on the other hand are available in different lengths. The bobbins, which differ in one dimension or the other and which are required for bobbins in a certain dimension range, can be provided solely by the fact that frame corner parts of the same size, which consist of the flanges (8b, 9b) and the leg sections ( 8g, 9g) exist, can be combined with different sets of connector elements.

Description

Die Erfindung betrifft einen Spulenkörper für luftgekühlte elektrische Wicklungen, beispielsweise von Transformatoren, mit achsparallel angeordneten Tragelementen, die einerseits als Halterung für einen Eisenkern und andererseits als Träger für mindestens eine innere und eine äußere Wicklung dienen, und mit die Tragelemente stirnseitig begrenzenden Halteorganen.The invention relates to a coil former for air-cooled electrical windings, for example of transformers, with supporting elements arranged axially parallel, which serve on the one hand as a holder for an iron core and on the other hand as a carrier for at least one inner and one outer winding, and with holding members delimiting the end elements on the end face.

Einer der gebräuchlichsten Spulenkörper dieser Art besteht aus einem quadratischen Zylinder, der an den beiden Stirnseiten in je einen von der geschlossenen Mantelfläche rechtwinklig nach außen gerichteten kragenartigen Flansch übergeht. Der Zylinder umschließt den Ei- - senkern und dient zugleich als Träger für die innere Wicklung. Die äußere Wicklung ist auf Stäben aufgebracht, die zwischen den Flanschen achsparallel angeordnet sind und mit ihren Enden in radiale Randschlitze an den Ecken der Flansche eingreifen.One of the most common bobbins of this type consists of a square cylinder which merges into a collar-like flange on the two end faces, each of which extends from the closed outer surface at a right angle. The cylinder encloses the iron countersinks and also serves as a carrier for the inner winding. The outer winding is applied to rods which are arranged axially parallel between the flanges and engage with their ends in radial edge slots at the corners of the flanges.

Dieser bekannte Spulenkörper besitzt den erheblichen Nachteil, daß für verschieden große Spulen entsprechend den an diese gestellten Anforderungen hinsichtlich.der Leistung und sonstiger physikalisch-technischer Eigenschaften auch verschieden große Spulenkörper hergestellt werden müssen. Selbst wenn sich die innerhalb eines bestimmten Abmessungsbereiches liegenden Spulen nur in einer einzigen Dimension, also nur in der Länge oder Breite oder Höhe, voneinander unterscheiden, muß für jede dieser Spulen ein besonderer Spulenkörper bereitgestellt werden. Derartige Spulenkörper lassen sich nur im Preß- oder Spritzgußverfahren herstellen, so daß für jede Spulenkörpergröße eine eigene Form angefertigt werden muß, wozu ein beträchtlicher wirtschaftlicher Aufwand erforderlich ist. Außerdem muß im Hinblick auf den innerhalb eines bestimmten Zeitabschnittes zu erwartenden Verbrauch aller lieferbaren Spulenkörpergrößen, also unabhängig von dem dann tatsächlich eintretenden Verbrauch in den einzelnen Größen, das reichhaltige Sortiment an Spulenkörpern in lückenloser Vollständigkeit sowohl seitens der Hersteller als auch seitens der Abnehmer auf Lager gehalten werden. Eine derart umfangreiche Lagerhaltung verursacht jedoch hohe Kosten und ist vielfach, namentlich in kleinen Betrieben, mangels ausreichendem Lagerraum nicht in dem erforderlichen Umfang realisierbar.This known bobbin has the considerable disadvantage that bobbins of different sizes also have to be produced for coils of different sizes in accordance with the requirements placed on them in terms of performance and other physical and technical properties. Even if the coils lying within a certain dimension range differ from one another only in a single dimension, that is to say only in length or width or height, a special coil former must be provided for each of these coils. Such bobbins can only be produced by pressing or injection molding, so that for each bobbin per size a separate form must be made, which requires considerable economic effort. In addition, with regard to the expected consumption of all available bobbin sizes within a certain period of time, i.e. regardless of the actual consumption in the individual sizes, the extensive range of bobbins must be kept in stock by both the manufacturer and the customer will. However, such extensive warehousing causes high costs and is often not feasible to the extent necessary, particularly in small companies, due to the lack of sufficient storage space.

Darüber hinaus ist es als nachteilig anzusehen, daß der die innere Wicklung tragende Zylinder eine geschlossene Mantelfläche aufweist, weil diese eine ausreichende Luftzirkulation verhindert, die zum Abführen der beim Betrieb der Spule entstehenden Wärme unerläßlich ist. Diesem Nachteil versucht man bei dem bekannten Spulenkörper durch die Verwendung qualitativ besseren Materials für die Eisenkerne zu begegnen, was jedoch insbesondere bei Transformatoren großer Abmessungen eine spürbare Erhöhung der Herstellungskosten mit sich bringt. Außerdem sind diese mantelseitig geschlossenen Spulenkörper sehr materialaufwendig, was sich vor allem dann kostenerhöhend auswirkt, wenn wegen des Erfordernisses einer hohen Temperaturbeständigkeit hochwertige und somit teure Werkstoffe, beispielsweise glasfaserverstärkte Kunststoffe, eingesetzt werden müssen.In addition, it is to be regarded as a disadvantage that the cylinder carrying the inner winding has a closed outer surface, because this prevents sufficient air circulation, which is essential for dissipating the heat generated during operation of the coil. In the known coil former, attempts are made to counter this disadvantage by using better quality material for the iron cores, but this results in a noticeable increase in production costs, particularly in the case of transformers of large dimensions. In addition, these shell-side closed bobbins are very expensive, which has a cost-increasing effect if, due to the requirement for high temperature resistance, high-quality and therefore expensive materials, for example glass-fiber reinforced plastics, have to be used.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen auf verschiedene Größen einstellbaren Spulenkörper zu schaffen, der sich einfach und materialsparend herstellen läßt und eine gute Luftzirkulation zwischen den Wicklungen ermöglicht.The present invention has for its object to provide an adjustable to different sizes bobbin, which can be produced easily and economically and good air circulation between enables the windings.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Spulenkörper hinsichtlich jeder Raumrichtung aus lösbar miteinander in Eingriff bringbaren Steckelementen besteht. Eine bevorzugte Ausführung dieses Spulenkörpers ist dadurch verwirklicht, daß die stirnseitigen Halteorgane als Steckrahmen ausgebildet sind, in deren Ausnehmungen längenvariable Sätze untereinander gleich langer Tragelemente wie Profilstäbe oder Distanzstäbe einsetzbar sind, und daß jeder Steckrahmen mindestens drei, vorzugsweise vier längenveränderbare Schenkel besitzt. Die Enden zweier aneinandergrenzender Schenkel gehen jeweils in einen nach außen gerichteten Flansch über, wobei die Flansche auf den gegenseitig zugekehrten Seiten der paarweise zugeordneten Steckrahmen mit einer U-förmigen Nut für den Eingriff der Distanzstäbe versehen sind.This object is achieved in that the coil body consists of releasably engageable plug elements with respect to each spatial direction. A preferred embodiment of this bobbin is realized in that the end-side holding members are designed as plug-in frames, in the recesses of which variable-length sets of supporting elements of the same length, such as profiled bars or spacer bars, can be used, and in that each plug-in frame has at least three, preferably four, length-adjustable legs. The ends of two adjoining legs each merge into an outwardly directed flange, the flanges being provided on the mutually facing sides of the paired plug-in frames with a U-shaped groove for the engagement of the spacer bars.

Der erfindungsgemäße Spulenkörper zeichnet sich gegenüber den herkömmlichen Spulenkörpern dieser Art dadurch aus, daß er nach dem Baukastenprinzip aufgebaut ist und sich durch bloßes Ineinanderstecken von Einzelelementen zusammenfügen läßt. Dabei kann eine Mehrzahl verschieden großer Spulenkörper.dadurch hergestellt werden, daß die zur Bildung zweier Steckrahmen erforderlichen Rahmeneckteile ein und derselben Größe jeweils mit unterschiedlich langen Sätzen von Schenkelverbindungsstücken und Tragelementen kombiniert werden.The bobbin according to the invention is distinguished from the conventional bobbins of this type in that it is constructed according to the modular principle and can be assembled by simply plugging individual elements into one another. A plurality of differently sized bobbins can be produced by combining the frame corner parts of one and the same size required to form two plug-in frames with sets of leg connectors and supporting elements of different lengths.

Weiterhin ist es als besonders vorteilhaft anzusehen, daß sich die Einzelteile des erfindungsgemäßen Spulenkörpers durch Extrudieren, Stanzen oder Pressen auf einfache und relativ billige Weise herstellen lassen. Die Anfertigung aufwendiger Formen ist nicht erforderlich.Furthermore, it is to be regarded as particularly advantageous that the individual parts of the coil former according to the invention can be produced in a simple and relatively inexpensive manner by extrusion, stamping or pressing. The production of elaborate forms is not necessary.

Schließlich lassen sich die Einzelteile des erfindungsgemäßen Spulenkörpers raumsparend unterbringen und verpacken, was sich bei der Lagerung und beim Versand vorteilhaft auswirkt.Finally, the individual parts of the coil former according to the invention can be accommodated and packaged in a space-saving manner, which has an advantageous effect on storage and shipping.

Bevorzugte Ausführungsbeispiele des erfindungsgemäßen Spulenkörpers sind in der Zeichnung dargestellt und werden nachfolgend des näheren erläutert. In der Zeichnung zeigen:

  • Fig. 1 einen viereckigen Steckrahmen mit unveränderbarer Schenkellänge in der Ansicht von außen,,
  • Fig. 2 einen viereckigen Steckrahmen mit veränderbarer Schenkellänge in der Ansicht von innen,
  • Fig. 3 den Steckrahmen gemäß Fig. 1 in Seitenansicht,
  • Fig. 4 einen Profilstab in perspektivischer Darstellung,
  • Fig. 5 einen Distanzstab in perspektivischer Darstellung,
  • Fig. 6 einen aus Profilstäben, Distanzstäben und größenveränderlichen viereckigen Steckrahmen zusammengesetzten Spulenkörper in perspektivischer Darstellung,
  • Fig. 7 ein aus zwei Flanschen, einer Verbindungsleiste und einer Verlängerungsleiste bestehendes Teilstück eines größenveränderlichen Steckrahmens in Explosionsdarstellung und
  • Fig. 8 zwei formschlüssig miteinander verbundene Flansche eines zwölfeckigen Steckrahmens.
Preferred embodiments of the bobbin according to the invention are shown in the drawing and are explained in more detail below. The drawing shows:
  • 1 is a square frame with unchangeable leg length in the view from the outside,
  • 2 shows a square frame with variable leg length in the view from the inside,
  • 3 shows the plug frame according to FIG. 1 in side view,
  • 4 shows a profile bar in a perspective view,
  • 5 shows a spacer bar in perspective view,
  • 6 is a perspective view of a coil bobbin composed of profile bars, spacer bars and size-adjustable square plug frames,
  • Fig. 7 a consisting of two flanges, a connecting bar and an extension bar part of a size-adjustable frame in an exploded view and
  • Fig. 8 two positively connected flanges of a twelve-sided frame.

In den Figuren 6, 2, 4 und 5 ist ein Spulenkörper 7 dargestellt, der aus zwei größenveränderlichen Steckrahmen 8 und 9 besteht, die mit Hilfe von vier in die Ausnehmungen 8a und 9a eingreifenden Profilstäben 10 lösbar miteinander verbunden sind. Die Profilstäbe 10 sind mit einer gewölbten Außenseite 10a versehen; diese Abrundungen ermöglichen ein präzises sowie beschädigungsfreies Aufbringen der inneren Wicklung 13. An seiner Innenseite besitzt der Profilstab 10 eine über die gesamte Stablänge sich erstreckende rechtwinklige Ausnehmung 10b, die als formschlüssige Halterung für eine Längskante eines nicht dargestellten Eisenkerns mit rechteckigem Querschnitt dient.6, 2, 4 and 5, a coil body 7 is shown, which consists of two size-adjustable plug frames 8 and 9, which are detachably connected to each other with the aid of four profile bars 10 engaging in the recesses 8a and 9a. The profile bars 10 are provided with a curved outer side 10a; these roundings enable a precise and damage-free application of the inner winding 13. On the inside, the profile bar 10 has a length of the entire bar extending rectangular recess 10b, which serves as a form-fitting holder for a longitudinal edge of an iron core, not shown, with a rectangular cross-section.

Der Steckrahmen 8, 9 gemäß Fig. 2 und 6 ist in beiden Richtungen in der Länge veränderbar. Er besitzt vier Eckstücke, wobei jedes Eckstück zwei im rechten Winkel zueinander verlaufende Schenkelabschnitte 8g,; 9g enthält, die in einen nach außen gerichteten Flansch 8b, 9b übergehen. Die Schenkelabschnitte 8g, 9g sind mit je einem Randschlitz 8h, 9h versehen. Je zwei einander zugeordnete Schenkelabschnitte 8g, 9g sind mittels einer rechteckigen Leiste 15, die mit ihren Enden mit Klemmwirkung in die Randschlitze 8h, 9h eingesteckt ist, verbunden. Gegebenenfalls können die Leisten 15 an den Verbindungsstellen noch zusätzlich mittels Klebstoff fixiert sein. An den sich gegenüberliegenden, also parallel zueinander verlaufenden Schenkeln des Steckrahmens 8, 9 müssen aus Symmetriegründen selbstverständlich immer gleich lange Leisten 15 eingesteckt werden. Durch .Einsetzen von paarweise verschieden langen Leisten 15 kann in beiden Dimensionen die Länge des Steckrahmens 8, 9 in entsprechendem Maße geändert werden.The plug frame 8, 9 according to FIGS. 2 and 6 can be changed in length in both directions. It has four corner pieces, each corner piece having two leg sections 8g running at right angles to one another; 9g contains, which merge into an outwardly directed flange 8b, 9b. The leg sections 8g, 9g are each provided with an edge slot 8h, 9h. Two mutually associated leg sections 8g, 9g are connected by means of a rectangular bar 15, the ends of which are inserted into the edge slots 8h, 9h with a clamping effect. If necessary, the strips 15 can additionally be fixed at the connection points by means of adhesive. For symmetry reasons, strips 15 of the same length must, of course, always be inserted on the opposite, ie parallel, legs of the plug frame 8, 9. By inserting strips 15 of different lengths, the length of the plug-in frame 8, 9 can be changed to the appropriate extent in both dimensions.

In Fig. 7 ist eine abgewandelte Art zum Verbinden zweier Eckstücke eines Steckrahmens dargestellt. In diesem Fall sind die Schenkelabschnitte 8g mit hinterschnittenen Schlitzen 8i versehen, in welche die entsprechend geformten Kupplungsköpfe 16a bzw. 17a von Verbindungsleisten 16 bzw. Verlängerungsleisten 17 einsteckbar sind. Ein derartiger Formschluß bringt den Vorteil mit sich, daß sich ohne weitere Hilfsmittel exakt definierte Schenkellängen herstellen lassen.In Fig. 7 a modified way of connecting two corner pieces of a plug frame is shown. In this case, the leg portions are provided with undercut slots 8g 8i into which the correspondingly shaped coupling heads 16a and 17a of connecting strips 1 6 and extension strips 17 can be inserted. Such a positive connection has the advantage that exactly defined leg lengths can be produced without further aids.

Die Flansche 8b, 9b dienen einerseits als seitliche Stützen für die Wicklungen 13, 14 und andererseits als Führungselemente für die Distanzstäbe 12. Die Flansche 8b, 9b sind in bezug auf den fertig zusammengesetzten Spulenkörper 7 an den gegenseitig zugekehrten Seiten der Steckrahmen 8, 9 mit je einer U-förmigen Nut'8f, 9f versehen. Jeder Flansch 8b, 9b weist einen zu seinen Kanten parallel verlaufenden, den Boden der Nut 8f, 9f durchsetzenden Schlitz 11 auf.The flanges 8b, 9b serve on the one hand as a lateral support zen for the windings 13, 14 and on the other hand as guide elements for the spacer bars 12. The flanges 8b, 9b are in relation to the assembled bobbin 7 on the mutually facing sides of the plug frames 8, 9, each with a U-shaped groove 8f, 9f. Each flange 8b, 9b has a slot 11 which runs parallel to its edges and penetrates the bottom of the groove 8f, 9f.

Die Distanzstäbe 12 haben einen viereckigen Querschnitt und besitzen an zwei gegenüberliegenden Längsseiten je eine durchgehende rinnenförmige Ausnehmung 12a. Die Distanzstäbe 12 werden so in die Nuten 8f, 9f der Flansche 8b, 9b eingeschoben, daß jeweils die eine der beiden Ausnehmungen 12a der inneren Wicklung 13 und die andere Ausnehmung 12a der anschließend aufzubringenden äußeren Wicklung 14 zugewendet ist.The spacer bars 12 have a square cross section and each have a continuous channel-shaped recess 12a on two opposite longitudinal sides. The spacer rods 12 are inserted into the grooves 8f, 9f of the flanges 8b, 9b such that one of the two recesses 12a of the inner winding 13 and the other recess 12a of the outer winding 14 to be subsequently applied are turned.

Die Distanzstäbe 12 lassen zwischen der inneren Wicklung 13 und der äußeren Wicklung 14 einen luftisolierten zylinderringförmigen Zwischenraum, einen sogenannten Kamin, entstehen, der von außen an beiden Stirnseiten des Spulenkörpers 7 durch trapezförmige Fenster 19 zugänglich ist, die an der Außenseite des Steckrahmens 8, 9 jeweils zwischen zwei nach außen gerichteten Flanschen 8b, 9b und der äußeren Wicklung 14 gebildet werden. Durch diese Fenster 19 kann die von den stromdurchflossenen Wicklungen 13, 14 erzeugte Warmluft austreten und Kaltluft von außen in den zylinderringförmigen Zwischenraum nachströmen. Erfindungsgemäß sind zwischen den rinnenförmigen Ausnehmungen 12a der Distanzstäbe 12 und den jeweils angrenzenden Wicklungen 13 bzw. 14 noch weitere Lüftungskanäle gebildet, mit denen stirnseitig die in den Flanschen 8b, 9b befindlichen Schlitze 11 fluchten.The spacer bars 12 create an air-insulated cylindrical ring-shaped space, a so-called chimney, between the inner winding 13 and the outer winding 14, which is accessible from the outside on both ends of the bobbin 7 through trapezoidal windows 19, which are on the outside of the plug frame 8, 9 are each formed between two outwardly directed flanges 8b, 9b and the outer winding 14. The warm air generated by the windings 13, 14 through which current flows can exit through these windows 19 and cold air can flow in from outside into the cylindrical space. According to the invention, further ventilation channels are formed between the trough-shaped recesses 12a of the spacer bars 12 and the respectively adjacent windings 13 and 14, with which the slots 11 located in the flanges 8b, 9b are aligned on the end face.

Für den Fall, daß der Spulenkörper nur in axialer Richtung längenveränderbar zu sein braucht, damit beispielsweise mehrere Spulen nebeneinander angeordnet werden können, kann erfindungsgemäß auch ein geschlossener Steckrahmen 8, 9 gemäß Fig. 1 und 3 verwendet werden. Bei dieser Ausführung sind die Schenkel 8c, 9c sowohl an den nach innen weisenden Seiten jedes einzelnen Steckrahmens 8, 9 mit U-förmigen Ausnehmungen 8d, 9d als auch an'den gegenseitig zugekehrten Seiten der beiden zugeordneten Steckrahmen 8, 9 mit U-förmigen Ausnehmungen 8e, 9e versehen. Auch diese Ausnehmungen begünstigen eine wirkungsvolle Luftzirkulation zum Abführen der entstehenden Wärme. Solche Ausnehmungen können selbstverständlich auch an dem Spulenkörper 7 gemäß Fig. 6 vorhanden sein.In the event that the coil body need only be adjustable in length in the axial direction, so that, for example, several coils can be arranged next to one another, a closed plug-in frame 8, 9 according to FIGS. 1 and 3 can also be used according to the invention. In this embodiment, the legs 8c, 9c are both on the inward-facing sides of each plug-in frame 8, 9 with U-shaped recesses 8d, 9d and on the mutually facing sides of the two associated plug-in frames 8, 9 with U-shaped recesses 8e, 9e provided. These recesses also promote effective air circulation to dissipate the heat generated. Such recesses can of course also be present on the coil former 7 according to FIG. 6.

Der erfindungsgemäße Spulenkörper ist freilich nicht auf eine viereckige Querschnittsform beschränkt, wenngleich diese am gebräuchlichsten sein dürfte. In Fig. 8 ist die räumliche Zuordnung zweier durch eine Leiste 15 miteinander verbundene.Flansche 18 eines zwölfeckigen Steckrahmens gezeigt. Analog zu dem Steckrahmen 8, 9 gemäß Fig. 2 besitzen die von den Flanschen 18 ausgehenden Schenkelabschnitte 18a jeweils zwei Randschlitze 18b zur Aufnahme der Leisten 15. Die Ausnehmungen 18c entsprechen den Ausnehmungen 8a. Jeder Flansch 18 ist mit einer U-förmigen Nut 18d versehen.The bobbin according to the invention is of course not limited to a square cross-sectional shape, although this is probably the most common. 8 shows the spatial assignment of two flanges 18, which are connected to one another by a strip 15, of a twelve-sided plug-in frame. Analogously to the plug-in frame 8, 9 according to FIG. 2, the leg sections 18a starting from the flanges 18 each have two edge slots 18b for receiving the strips 15. The recesses 18c correspond to the recesses 8a. Each flange 18 is provided with a U-shaped groove 18d.

Claims (14)

1. Spulenkörper für luftgekühlte elektrische Wicklungen, beispielsweise von Transformatoren, mit achsparallel angeordneten Tragelementen für einen Eisenkern und . für mindestens eine innere und eine äußere Wicklung und mit die Tragelemente stirnseitig begrenzenden Halteorganen, dadurch gekennzeichnet, daß der Spulenkörper (7) hinsichtlich jeder Raumrichtung aus lösbar miteinander in Eingriff bringbaren Steckelementen besteht.1. Coil former for air-cooled electrical windings, for example of transformers, with axially parallel supporting elements for an iron core and. For at least one inner and one outer winding and with holding members delimiting the end face of the support elements, characterized in that the coil body (7) consists of plug elements which can be releasably engaged with one another with respect to each spatial direction. 2. Spulenkörper nach Anspruch 1, dadurch gekennzeichnet, daß jedes Halteorgan als Steckrahmen (8, 9) mit die Rahmendicke teilweise oder ganz durchsetzenden Ausnehmungen (8a, 9a) zur Aufnahme der Tragelemente ausgebildet ist und daß zwischen zwei einander zugeordneten Steckrahmen (8, 9) längenvariable Sätze untereinander gleich langer Tragelemente wie Profilstäbe (10) oder Distanzstäbe (12) einsetzbar sind.2. Coil body according to claim 1, characterized in that each holding member is designed as a plug-in frame (8, 9) with the frame thickness partially or completely through recesses (8a, 9a) for receiving the support elements and that between two mutually assigned plug-in frames (8, 9th ) variable-length sets of mutually equal supporting elements such as profile bars (10) or spacer bars (12) can be used. 3. Spulenkörper nach Anspruch 2, dadurch gekennzeichnet, daß der Steckrahmen (8, 9) aus mindestens drei Schenkeln (8c, 9c) besteht'und die Enden zweier aneinandergrenzender Schenkel jeweils in einen nach außen gerichteten Flansch (8b, 9b) übergehen.3. Bobbin according to claim 2, characterized in that the plug-in frame (8, 9) consists of at least three legs (8c, 9c) 'and the ends of two adjacent legs each merge into an outwardly directed flange (8b, 9b). 4. Spulenkörper nach Anspruch 3, dadurch gekennzeichnet, daß jeder Schenkel aus zwei von den Flanschen (8b, 9b) ausgehenden Schenkelabschnitten (8g, 9g) besteht, die zur Bildung veränderbarer Schenkellängen unmittelbar oder mittelbar miteinander verbindbar sind.4. Coil body according to claim 3, characterized in that each leg consists of two outgoing from the flanges (8b, 9b) leg sections (8g, 9g) which are directly or indirectly connectable to form variable leg lengths. 5. Spulenkörper nach Anspruch 4, dadurch gekennzeichnet, daß von den beiden einander zugeordneten Schenkelabschnitten jedes Schenkels der eine als Zapfen und der andere als den Zapfen aufnehmendes Gegenstück ausgebildet ist.5. Bobbin according to claim 4, characterized in that one of the two mutually associated leg portions of each leg is designed as a pin and the other as the pin receiving counterpart. 6. Spulenkörper nach Anspruch 4, dadurch gekennzeichnet, daß die beiden Schenkelabschnitte (8g, 9g) jedes Schenkels je einen vom freien Ende her zugänglichen Randschlitz (8h, 9h) besitzen und mittels einer in diese Randschlitze eingreifenden Leiste (15) miteinander verbindbar sind.6. bobbin according to claim 4, characterized in that the two leg portions (8g, 9g) each leg each have an accessible from the free end edge slot (8h, 9h) and by means of an engaging in these edge slots bar (15) can be connected to each other. 7. Spulenkörper nach Anspruch 4, dadurch gekennzeichnet, daß die Flansche (18) oder die von den Flanschen (8b, 9b) ausgehenden Schenkelabschnitte (8g, 9g) jeweils einen vom freien Ende her zugänglichen hinterschnittenen Schlitz (8i) aufweisen, mit dem der entsprechend geformte Kupplungskopf (16a) einer Verbindungsleiste (16) formschlüssig verbindbar ist.7. Bobbin according to claim 4, characterized in that the flanges (18) or from the flanges (8b, 9b) outgoing leg sections (8g, 9g) each have an undercut slot (8i) accessible from the free end, with which the appropriately shaped coupling head (16a) of a connecting bar (16) can be positively connected. 8. Spulenkörper nach Anspruch 4 und 7, gekennzeichnet durch eine Verlängerungsleiste (17), die an ihrem einen Ende einen in den hinterschnittenen Schlitz (8i) eines Schenkelabschnittes (8g, 9g) einsteckbaren Kupplungskopf (17a) und an ihrem anderen Ende einen hinterschnittenen Schlitz (17b) zur Aufnahme eines Kupplungskopfes (16a) einer Verbindungsleiste (16) aufweist.8. bobbin according to claim 4 and 7, characterized by an extension bar (17) having at one end in the undercut slot (8i) of a leg portion (8g, 9g) insertable coupling head (17a) and at the other end an undercut slot (17b) for receiving a coupling head (16a) of a connecting bar (16). 9. Spulenkörper nach Anspruch 1 und 2, dadurch gekennzeichnet, daß jeder der die beiden Steckrahmen (8, 9) lösbar miteinander verbindenden Profilstäbe (10) eine konvex gewölbte Außenwand (10a) und innenseitig eine der Form des Eisenkerns angepaßte, vorzugsweise rechtwinklige Ausnehmung (10b) aufweist.9. coil former according to claim 1 and 2, characterized in that each of the two connecting frames (8, 9) releasably connecting profile bars (10) has a convexly curved outer wall (10a) and on the inside a preferably rectangular recess (10b) adapted to the shape of the iron core. 10. Spulenkörper nach Anspruch 3, dadurch gekennzeichnet, daß die Flansche (8b, 9b) auf den gegenseitig zugekehrten Seiten der Steckrahmen (8, 9) mit einer U-förmigen Nut (8f, 9f) für den Eingriff der Distanzstäbe (12) versehen sind.10. Bobbin according to claim 3, characterized in that the flanges (8b, 9b) on the mutually facing sides of the plug-in frame (8, 9) with a U-shaped groove (8f, 9f) for engaging the spacer bars (12) are. 11. Spulenkörper nach Anspruch 3, dadurch gekennzeichnet, daß die Flansche (8b, 9b) einen parallel zu der Nut (8f, 9f) verlaufenden Schlitz (11) aufweisen.11. Bobbin according to claim 3, characterized in that the flanges (8b, 9b) have a slot (11) extending parallel to the groove (8f, 9f). 12. Spulenkörper nach Anspruch 3, dadurch gekennzeichnet, daß die vorzugsweise einen viereckigen Querschnitt aufweisenden Schenkel (8c, 9c) der Steckrahmen (8,9) an den Innenseiten eine über einen wesentlichen Teil der Schenkellänge sich erstreckende U-förmige Ausnehmung (8d, 9d) besitzen.12. Bobbin according to claim 3, characterized in that the legs (8c, 9c) of the plug-in frame (8,9), which preferably have a square cross-section, have a U-shaped recess (8d, 9d) on the inner sides extending over a substantial part of the leg length ) own. 13. Spulenkörper nach Anspruch 3, dadurch gekennzeichnet, daß die Schenkel (8c, 9c) der Steckrahmen (8, 9) an deren gegenseitig zugekehrten Seiten eine über einen wesentlichen Teil der Schenkellänge sich erstreckende U-förmige Ausnehmung (8e, 9e) aufweisen.13. Coil body according to claim 3, characterized in that the legs (8c, 9c) of the plug-in frame (8, 9) on their mutually facing sides have a substantial part of the leg length extending U-shaped recess (8e, 9e). 14. Spulenkörper nach Anspruch 2, dadurch gekennzeichnet, daß die mit ihren Enden in die U-förmigen Nuten (8f, 9f) der Flansche (8b, 9b) einzusetzenden Distanzstäbe (12) einen viereckigen Querschnitt aufweisen und wenigstens an zwei gegenüberliegenden Längsseiten eine durchgehende rinnenförmige Ausnehmung (12a) besitzen.14. Coil former according to claim 2, characterized in that the ends to be inserted into the U-shaped grooves (8f, 9f) of the flanges (8b, 9b) rods (12) have a square cross section and have a continuous channel-shaped recess (12a) on at least two opposite longitudinal sides.
EP81102127A 1980-03-21 1981-03-20 Bobbin for air-cooled coil Expired EP0037500B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102127T ATE15420T1 (en) 1980-03-21 1981-03-20 COIL FRAME FOR AIR-COOLED ELECTRICAL WINDINGS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19803010823 DE3010823A1 (en) 1980-03-21 1980-03-21 Coil carrier frame for additional transformer windings - consists of inner and outer longitudinals carry windings, between square end members
DE3010823 1980-03-21
DE8108092U 1981-03-19
DE19818108092 DE8108092U1 (en) 1981-03-19 1981-03-19 KAEFIG-SHAPED REEL FOR ELECTRICAL WINDINGS

Publications (2)

Publication Number Publication Date
EP0037500A1 true EP0037500A1 (en) 1981-10-14
EP0037500B1 EP0037500B1 (en) 1985-09-04

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ID=25784437

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EP81102127A Expired EP0037500B1 (en) 1980-03-21 1981-03-20 Bobbin for air-cooled coil

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Country Link
US (1) US4429294A (en)
EP (1) EP0037500B1 (en)
DE (1) DE3172103D1 (en)
DK (1) DK152463C (en)
FI (1) FI71038C (en)
NO (1) NO155948C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004022043B3 (en) * 2004-05-03 2005-06-09 Rudolf Michael Gmbh Electrical coil winding frame assembled from longitudinal rods and cross-supports with each longitudinal rod assembled from at least 2 longitudinal parts
WO2014135205A1 (en) * 2013-03-06 2014-09-12 Siemens Ag Österreich Electrical transformer or choke and winding arrangement with spacer

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
US4944975A (en) * 1988-10-03 1990-07-31 E. I. Du Pont De Nemours And Company Composite coil forms for electrical systems
US5497136A (en) * 1992-11-30 1996-03-05 Dana Corporation Locating ring for encapsulating a coil
DE20317986U1 (en) * 2003-11-20 2004-07-15 Pieper, Rolf Coil support plug-in system
TW201429105A (en) * 2013-01-04 2014-07-16 Primax Electronics Ltd Wireless charging transferring device
US20170092408A1 (en) 2015-09-28 2017-03-30 Trench Limited Composite cradle for use with coil of air core reactors

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WO2014135205A1 (en) * 2013-03-06 2014-09-12 Siemens Ag Österreich Electrical transformer or choke and winding arrangement with spacer

Also Published As

Publication number Publication date
NO155948C (en) 1987-06-24
EP0037500B1 (en) 1985-09-04
DE3172103D1 (en) 1985-10-10
DK127381A (en) 1981-09-22
US4429294A (en) 1984-01-31
FI71038B (en) 1986-07-18
NO810974L (en) 1981-09-22
FI810882L (en) 1981-09-22
NO155948B (en) 1987-03-16
DK152463C (en) 1988-08-01
FI71038C (en) 1986-10-27
DK152463B (en) 1988-02-29

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