EP0037500B1 - Bobbin for air-cooled coil - Google Patents

Bobbin for air-cooled coil Download PDF

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Publication number
EP0037500B1
EP0037500B1 EP81102127A EP81102127A EP0037500B1 EP 0037500 B1 EP0037500 B1 EP 0037500B1 EP 81102127 A EP81102127 A EP 81102127A EP 81102127 A EP81102127 A EP 81102127A EP 0037500 B1 EP0037500 B1 EP 0037500B1
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EP
European Patent Office
Prior art keywords
bobbin creel
creel according
arm
frames
flanges
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.)
Expired
Application number
EP81102127A
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German (de)
French (fr)
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EP0037500A1 (en
Inventor
Harald Meffert
Rolf Pieper
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W Meffert KG
Original Assignee
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 frame according to the preamble of claim 1.
  • 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, which is directed outward at right angles from the closed outer surface.
  • the cylinder surrounds the iron core 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 with their ends engage in radial edge slots at the corners of the flanges (e.g. DE-A-2162104).
  • This known bobbin has the disadvantage that it is also necessary to produce bobbins of different sizes 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 the press or injection molding process, so that a separate shape must be produced for each bobbin size, for which a considerable economic outlay is required. In addition, with regard to the expected consumption of all available bobbin sizes within a certain period of time, i.e.
  • US-A-3 352 509 shows a coil former in which the two end parts are plugged together with the longitudinal parts, but which requires different longitudinal end parts for each core size.
  • 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.
  • This disadvantage is attempted in the known bobbins by using better quality material for the iron cores, but this results in a noticeable increase in manufacturing 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 of high temperature resistance, high-quality and thus expensive materials, for example glass-fiber reinforced plastics, have to be used.
  • the present invention has for its object to provide a coil body adjustable to different core sizes, which can be produced easily and in a material-saving manner and enables good air circulation between the windings.
  • the bobbin frame according to the invention is distinguished from 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 bobbin frames 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 frame 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 bobbin frame 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 frame 7 which consists of two size changes Chen plug-in frame 8 and 9, which are releasably connected to one another 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 profiled rod 10 has a rectangular recess 10b which extends over the entire rod length and which serves as a form-fitting holder for a longitudinal edge of an iron core (not shown) with a rectangular cross-section.
  • the plug-in frame 8, 9 according to FIGS. 2 and 6 can be changed in the longitudinal direction and in the core cross section. It has four corner pieces, each corner piece containing two leg sections 8g, 9g which run at right angles to one another and 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.
  • strips 15 of the same length must, of course, always be inserted on the opposite, ie parallel, legs of the plug frame 8, 9.
  • the length of the plug-in frame 8, 9 can be changed to the appropriate extent in both dimensions.
  • leg sections 8g are provided with undercut slots 8i into which the correspondingly shaped coupling heads 16a and 17a of connecting strips 16 and extension strips 17 can be inserted.
  • Such a form fit has the advantage that exactly defined leg lengths can be produced without further aids.
  • the flanges 8b, 9b serve on the one hand as lateral supports for the windings 13, 14 and on the other hand as guide elements for the spacer bars 12.
  • the flanges 8b, 9b are with respect to the assembled coil frame 7 on the mutually facing sides of the plug frames 8, 9 each provided 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 bars 12 are pushed into the grooves 8f, 9f of the flanges 8b, 9b in such a way 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 coil frame 7 through trapezoidal windows 19, which are on the outside of the plug-in 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 groove-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 inwardly facing sides of each plug frame 8, 9 with U-shaped recesses 8d, 9d and on the mutually facing sides of the two associated plug 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 provided on the coil frame 7 according to FIG. 6.
  • the coil frame 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 of a twelve-sided plug-in frame which are connected to one another by a strip 15. 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)
  • Coils Of Transformers For General Uses (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Description

Die Erfindung betrifft ein Spulengestell gemäss dem Oberbegriff des Anspruches 1.The invention relates to a coil frame according to the preamble of claim 1.

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 Eisenkern 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 (z. B. DE-A-2162104).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, which is directed outward at right angles from the closed outer surface. The cylinder surrounds the iron core 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 with their ends engage in radial edge slots at the corners of the flanges (e.g. DE-A-2162104).

Dieser bekannte Spulenkörper besitzt den 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 lükkenloser 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 disadvantage that it is also necessary to produce bobbins of different sizes 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 the press or injection molding process, so that a separate shape must be produced for each bobbin size, for which a considerable economic outlay is required. 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 of the individual sizes, the comprehensive range of bobbins must be kept in stock by both the manufacturer and the customer will. Such extensive warehousing, however, causes high costs and is often not feasible to the extent necessary, especially in small companies, due to the lack of sufficient storage space.

So zeigt die US-A-3 352 509 einen Spulenkörper, bei dem die beiden Stirnteile mit den Längsteilen zusammengesteckt sind, der aber für jede Kerngrösse unterschiedliche Stirn- Längsteile benötigt.For example, US-A-3 352 509 shows a coil former in which the two end parts are plugged together with the longitudinal parts, but which requires different longitudinal end parts for each core size.

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 den bekannten Spulenkörpern durch die Verwendung von 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. This disadvantage is attempted in the known bobbins by using better quality material for the iron cores, but this results in a noticeable increase in manufacturing 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 of high temperature resistance, high-quality and thus expensive materials, for example glass-fiber reinforced plastics, have to be used.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen auf verschiedene Kerngrössen 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 a coil body adjustable to different core sizes, which can be produced easily and in a material-saving manner and enables good air circulation between the windings.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Vorteilhafte Weiterbildungen zeigen die abhängigen Ansprüche.The dependent claims show advantageous further developments.

Das erfindungsgemässe Spulengestell 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 Spulengestelle 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 frame according to the invention is distinguished from 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 bobbin frames 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 Spulengestells durch Extrudieren, Stanzen oder Pressen auf einfache und relativ billige Weise herstellen lassen. Die Anfertigung aufwendiger Formen ist nicht erforderlich.Furthermore, it is considered to be particularly advantageous that the individual parts of the coil frame 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 Spulengestells raumsparend unterbringen und verpacken, was sich bei der Lagerung und beim Versand vorteilhaft auswirkt.Finally, the individual parts of the bobbin frame 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 Spulengestells 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. 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 exemplary embodiments of the bobbin frame 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 plug-in 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 rod in a perspective view,
  • 6 is a perspective view of a coil former composed of profile rods, spacer rods and size-adjustable square plug frames,
  • Fig. 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 Spulengestell 7 dargestellt, das 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.In the figures 6, 2, 4 and 5, a coil frame 7 is shown, which consists of two size changes Chen plug-in frame 8 and 9, which are releasably connected to one another 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 profiled rod 10 has a rectangular recess 10b which extends over the entire rod length and 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 Längsrichtung und im Kernquerschnitt 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-in frame 8, 9 according to FIGS. 2 and 6 can be changed in the longitudinal direction and in the core cross section. It has four corner pieces, each corner piece containing two leg sections 8g, 9g which run at right angles to one another and 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.7 shows a modified way of connecting two corner pieces of a plug-in frame. In this case, the leg sections 8g are provided with undercut slots 8i into which the correspondingly shaped coupling heads 16a and 17a of connecting strips 16 and extension strips 17 can be inserted. Such a form fit 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 das fertig zusammengesetzte Spulengestell 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 lateral supports for the windings 13, 14 and on the other hand as guide elements for the spacer bars 12. The flanges 8b, 9b are with respect to the assembled coil frame 7 on the mutually facing sides of the plug frames 8, 9 each provided 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 bars 12 are pushed into the grooves 8f, 9f of the flanges 8b, 9b in such a way 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 Spulengestells 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 coil frame 7 through trapezoidal windows 19, which are on the outside of the plug-in 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 groove-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 das Spulengestell 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 Spulengestell 7 gemäss Fig. 6 vorhanden sein.In the event that the coil frame 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 inwardly facing sides of each plug frame 8, 9 with U-shaped recesses 8d, 9d and on the mutually facing sides of the two associated plug 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 provided on the coil frame 7 according to FIG. 6.

Das erfindungsgemässe Spulengestell 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 coil frame 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 of a twelve-sided plug-in frame which are connected to one another by a strip 15. 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. A bobbin creel for air-cooled electrical coils, for example of transformers, having support elements disposed axially parallel for an iron core and for at least one inner and one outer coil and frames (8, 9) which confine the support elements at their front ends and to which support elements can be connected in a positive manner, characterized in that between two frames (8, 9) associated with one another the support elements are in the form of longitudinally variable rods (10, 12) of continuously unchanged cross-section, and each rod (10, 12) engages in a separate recess (8a, 9a) or slot (11) passing completely or partially through the thickness of the frame.
2. A bobbin creel according to Claim 1, characterized in that each arm (9c) of a frame (9) comprises insertion elements (15, 16, 17) which are detachably engageable with one another.
3. A bobbin creel according to Claim 1, characterized in that the frame (8, 9) comprises at least three arms (8c, 9c) and the ends of two adjacent arms pass in each case into an outwardly directed flange (8b, 9b).
4. A bobbin creel according to Claim 3, characterized in that each arm comprises two arm portions (8g, 9g) which start from the flanges (8b, 9b) and which can be connected together directly or indirectly in order to form variable arm lengths.
5. A bobbin creel according to Claim 4, characterized in that of the two arm portions (8g, 9g) of each arm associated with one another one is in the form of a pin and the other is in the form of a counter member receiving the pin.
6. A bobbin creel according to Claim 4, characterized in that the two arm portions (8g, 9g) of each arm each comprise an edge slot (8h, 9h) accessible from the free end and can be connected together by means of a bar (15) engaging in the said edge slot.
7. A bobbin creel according to Claim 4, characterized in that the flangs (18) or the arm portions (8g, 9g) starting from the flanges (8b, 9b) each comprise an undercut slot (8i) which is accessible from the free end and to which the correspondingly shaped connexion head (16a) of a connecting bar (16) can be connected in a positive manner.
8. A bobbin creel according to Claims 4 and 7, characterized by an extension bar (17), which at one end has a connexion head (17a) which can be inserted into the undercut slot (8i) of one arm portion (8g, 9g) and at the other end has an undercut slot (17b) for receiving a connexion head (16a) of a connecting bar (16).
9. A bobbin creel according to Claim 1, characterized in that each of the rods (10) connecting the two frames (8, 9) detachably to one another comprises a convexly curved outer wall (10a) and on the inside a preferably rectangular recess (10b) adapted to the shape of the core.
10. A bobbin creel according to Claim 3, characterized in that the flanges (8b, 9b) on the mutually facing sides of the frames (8, 9) are provided with a U-shaped groove (8f, 9f) for the engagement of spacer rods (12).
11. A bobbin creel according to Claim 3, characterized in that the flanges (8b, 9b) have a slot (11) extending parallel to the groove (8f, 9f).
12. A bobbin creel according to Claim 3, characterized in that on the insides the arms (8c, 9c) of the frames (8, 9) preferably having a rectangular cross-section have a U-shaped recess (8d, 9d) extending over a considerable part of the length of the arms.
13. A bobbin creel according to Claim 3, characterized in that on their mutually facing sides the arms (8c, 9c) of the frames (8, 9) have a U-shaped recess (8e, 9e) extending over a considerable part of the length of the arms.
14. A bobbin creel according to Claim 10, characterized in that the spacer rods (12) to be inserted with their ends in the U-shaped grooves (8f, 9f) of the flanges (8b, 9b) have a square cross-section and a continuous trough-shaped recess (12a) at least on 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
DE19818108092 DE8108092U1 (en) 1981-03-19 1981-03-19 KAEFIG-SHAPED REEL FOR ELECTRICAL WINDINGS
DE8108092U 1981-03-19

Publications (2)

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

Family

ID=25784437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102127A Expired EP0037500B1 (en) 1980-03-21 1981-03-20 Bobbin for air-cooled coil

Country Status (6)

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)

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DE102004056316B4 (en) * 2003-11-20 2011-12-15 Rolf Pieper creel

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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
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
TW201429105A (en) * 2013-01-04 2014-07-16 Primax Electronics Ltd Wireless charging transferring device
WO2014135205A1 (en) * 2013-03-06 2014-09-12 Siemens Ag Österreich Electrical transformer or choke and winding arrangement with spacer
US20170092408A1 (en) * 2015-09-28 2017-03-30 Trench Limited Composite cradle for use with coil of air core reactors

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Also Published As

Publication number Publication date
US4429294A (en) 1984-01-31
NO155948B (en) 1987-03-16
FI810882L (en) 1981-09-22
DE3172103D1 (en) 1985-10-10
DK152463C (en) 1988-08-01
NO155948C (en) 1987-06-24
FI71038C (en) 1986-10-27
DK152463B (en) 1988-02-29
NO810974L (en) 1981-09-22
FI71038B (en) 1986-07-18
EP0037500A1 (en) 1981-10-14
DK127381A (en) 1981-09-22

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