EP0217103A1 - Transformer with a moulded insulative encapsulation - Google Patents

Transformer with a moulded insulative encapsulation Download PDF

Info

Publication number
EP0217103A1
EP0217103A1 EP86111589A EP86111589A EP0217103A1 EP 0217103 A1 EP0217103 A1 EP 0217103A1 EP 86111589 A EP86111589 A EP 86111589A EP 86111589 A EP86111589 A EP 86111589A EP 0217103 A1 EP0217103 A1 EP 0217103A1
Authority
EP
European Patent Office
Prior art keywords
transformer
winding
connection rubber
iron core
connection
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
EP86111589A
Other languages
German (de)
French (fr)
Other versions
EP0217103B1 (en
Inventor
Peter Dipl.-Ing. Bradt
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT86111589T priority Critical patent/ATE43454T1/en
Publication of EP0217103A1 publication Critical patent/EP0217103A1/en
Application granted granted Critical
Publication of EP0217103B1 publication Critical patent/EP0217103B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F41/005—Impregnating or encapsulating

Definitions

  • the invention relates to a transformer with a cast insulating jacket, in particular for underfloor airfield lighting, and a method for its production.
  • Such transformers are recessed into the runways of airfields with the connected headlights and, in addition to a small installation space, must have complete tightness and resistance to alkalis, acids and sea water, in particular to ensure operational safety.
  • a high-voltage-resistant, insulating-coated transformer in particular for use in underfloor airport lighting systems, is to be created which, despite simple manufacture and only a small size, can ensure the tightness and required resistance to sea water and alkalis and acids.
  • the transformer according to the invention without additional separate buffering of the active part, with its only directly injection-molded elastic sheathing of the winding applied to a coil former spacing the iron core on all sides and the injection of the space between the iron core and coil former, which is ensured in a simple manner by the spacer webs requirements for tightness and resistance to soil, sea water as well as alkalis and acids can be met even if the inner active part heats up;
  • the penetration of moisture along the outward connection means for the outer connection line is now also clearly prevented by the fact that the connection rubber bushings which are pre-fixed on the coil former and already co-injected during the production of the sheathing during cooling of the insulating sheath in the sense of a press connection with a high sealing pressure of the injection molding compound are enclosed.
  • connection rubber bushings for holding the part to be overmolded at least consisting of core, bobbin with primary or secondary winding and pre-fixed connection means existing connection part for holding in the injection mold until the overmolded insulation cools mass shared.
  • injection is preferably carried out in the direction of the coil axis.
  • the coil former 2 used in the transformer according to the invention is shown in FIGS. 1 to 3.
  • the winding space for the primary winding 7 is located between the right end flange 21 and the opposite central flange 23, and the winding space for the secondary winding 8 is located between the left end flange 22 and the opposite central flange 24.
  • At the top of the coil former 2 are 21 on the right end flange 21 two brackets 25, 26 for the pre-fixed mounting of connection rubber bushings 3, 4 for the primary winding 7 and on the upper side of the left end flange 22 a mounting bracket 27 for the pre-fixed mounting of a connection rubber bushing 5 for the secondary winding 8 is also molded.
  • Fig. 4 shows a single connection rubber bushing 4, which receives in its center a connection means for the respective winding end and an outer connection line and has a pin 41 cast into the side of this connection means, with which the connection rubber bushing 4 connects to the in 3 shown mounts can be inserted and thereby pre-fixable.
  • a plug-in sleeve 10 is inserted as a connection means into the connection rubber bush.
  • One winding end of the primary or secondary winding 7 or 8 is inserted and soldered or crimped into the lower sleeve part protruding from the connecting rubber bushing; a plug connected to the stripped part of an outer connecting line is inserted into the upper sleeve part, the stripped part of the outer connecting line being pressed directly or indirectly into the recess 42 of the connecting rubber bushing.
  • 11 is a second embodiment of an advantageously sealed connection vulcanized into the connecting rubber bushing 4 as a prefabricated connecting component, the inner stripped end 92 of which is stripped and protrudes from the connecting rubber bushing and is connected to one winding end of the primary and secondary winding 7; 8.
  • connection rubber bushings 3 The assembly of the entire bobbin 2 with all pre-fixed connection rubber bushings can be seen in Figures 5,6 and 9.
  • the high-voltage primary winding has two separate connection rubber bushings 3, 4, each with a connection means 71 and 72, respectively, for connecting an outer line to the primary winding 7; in the single rubber socket 5 for the secondary winding 8, both connection means 81, 82 for the outer line or the winding ends of the secondary winding 8 are combined.
  • FIGS. 7, 8 show the wound and equipped active part of the transformer according to FIG. 5 or FIG. 6 after the molded insulating jacket; 10 shows the view of the active part of the transformer according to FIG. 9 after its injection-molded casing.
  • spacer webs 28 are attached to the inner surfaces of the rectangular coil core of the coil body 2, which comprises the inserted iron core, such that the transformer iron core 1 is kept at a distance from the coil body 2 in accordance with the height of the distance webs 28 the resulting space between the transformer iron core 1 and the coil body 2 and thus the primary winding 7 and secondary winding 8 can also be completely filled with the injection-molded insulating material made of elastic thermoplastic.
  • the spacer webs 28 abut one another outside the corners the inner surfaces of the right-angled coil core of the coil body 2 are arranged so that the core corners, at which particularly high field strengths occur, have reliable insulation from the surrounding primary or secondary winding.
  • an earthing strap 6, which protrudes from the injection-molded insulating jacket can additionally be welded onto the outside of the laminated core, for example.
  • the wound and equipped active part to be overmolded is advantageously set up in the injection mold by means of its connecting rubber bushings 3-5, so that no further additional external spacing means are necessary which could give rise to dangerous inhomogeneous zones in the insulating sheathing .
  • the injection molding compound filled in under high pressure is preferably injected in the direction of the coil axis, so that the transformer is held in the injection mold in the centered position and thus sufficient insulation sheathing guaranteed on all sides.

Abstract

Um mit einfachen Mitteln einen kompakten, hochspannungs­festen und gegen Feuchtigkeit, Laugen un Säuren resisten­ten Transformator für Flugplatzbefeuerungen schaffen zu können, ist folgendes vorgesehen:

  • a) Primärwicklung und Sekundärwicklung sind auf einen über den Transformator-Eisenkern gesteckten Kunststoff-­Spulenkörper gewickelt;
  • b) an dem Kunststoff-Spulenkörper (2) sind Anschluß-­Gummibuchsen (3-5) vorfixiert gehalten, die mit den Wicklungsenden der Primär- und der Sekundärwicklung (7,8) verbundene Anschlußmittel (71,72;81,82 bzw.91,92) für äußere Anschlußleitungen aufnehmen;
  • c) der bewickelte Spulenkörper (2) mit dem eingesteckten Transformator-Eisenkern (1) und den vorfixiert gehal­tenen Anschluß-Gummibuchsen (3-5) ist direkt mit einem elastischen Thermoplast als einziger Isolierummante­lung spritzumgossen;
  • d) der Transformator-Eisenkern (1) ist durch an die Innenflächen des rechteckigen Spulenkerns des Spulen­körpers (2) angeformte Distanzstege (28) derart in Abstand gehalten, daß der Zwischenraum voll mit dem elastischen Thermoplast ausspritzbar ist.
Figure imgaf001
In order to be able to use simple means to create a compact, high-voltage-resistant and moisture, alkali and acid-resistant transformer for airport lighting, the following is provided:
  • a) primary winding and secondary winding are wound on a plastic bobbin inserted over the transformer iron core;
  • b) on the plastic bobbin (2) connection rubber bushings (3-5) are held pre-fixed, the connection means (71,72; 81,82 and 91) connected to the winding ends of the primary and secondary windings (7,8) , 92) for external connection lines;
  • c) the wound bobbin (2) with the inserted transformer iron core (1) and the pre-fixed connection rubber bushings (3-5) is injection molded directly with an elastic thermoplastic as the only insulating jacket;
  • d) the transformer iron core (1) is held at a distance by spacers (28) molded onto the inner surfaces of the rectangular coil core of the coil body (2) in such a way that the intermediate space can be fully sprayed out with the elastic thermoplastic.
Figure imgaf001

Description

Die Erfindung bezieht sich auf einen Transformator mit gegossener Isolierummantelung, insbesondere für eine Unterflur-Flugplatzbefeuerung, und ein Verfahren zu dessen Herstellung. Derartige Transformatoren werden mit den angeschlossenen Scheinwerfern in Rollbahnen von Flugplätzen versenkt eingelassen und müssen neben einem kleinen Einbauraum insbesondere zur gewährleisteten Be­triebssicherheit eine vollständige Dichtigkeit und Resi­stenz gegen Laugen, Säuren und Meerwasser aufweisen.The invention relates to a transformer with a cast insulating jacket, in particular for underfloor airfield lighting, and a method for its production. Such transformers are recessed into the runways of airfields with the connected headlights and, in addition to a small installation space, must have complete tightness and resistance to alkalis, acids and sea water, in particular to ensure operational safety.

Bei einem durch die US-PS 40 19 167 bekannten Transfor­mator mit einer Gießharz-Ummantelung zur Anwendung für eine Flugplatzbefeuerung wird der mit Primär- und Sekun­därspule umwickelte Transformator-Eisenkern vor dem eigentlichen Gießharz-Umgießen in eine Gummimanschette eingekapselt; durch diese zusätzliche Pufferung sollen u.a.Wärmespannungen und Wärmedehnungen der Eisenkern-­Spulen-Einheit von der eigentlichen Gießharz-Außenummante­lung ferngehalten werden. Zum Anschluß der äußeren An­schlußleitungen sind mit den Wicklungsenden von Primär- und Sekundärwicklung verbundene Anschlußstifte direkt in die Ummantelung eingegossen; die freien Außenenden dieser Anschlußstifte ragen in die Außenummantelung eingeformte trichterförmige Vertiefungen, in die Gummi­steckbuchsen beim Anschluß der Außenleitung eingesteckt werden, die innen mit der Außenleitung verbundene Gegen­steckhülsen aufnehmen.In a transformer known from US Pat. No. 4,019,167 with a cast resin sheathing for use in airfield lighting, the transformer iron core wrapped with primary and secondary coils is encapsulated in a rubber sleeve before the actual cast resin sheathing; This additional buffering is intended, inter alia, to keep thermal stresses and thermal expansions of the iron core-coil unit away from the actual cast resin outer jacket. To connect the outer connecting lines, connecting pins connected to the winding ends of the primary and secondary windings are cast directly into the casing; the free outer ends of these connecting pins protrude into the outer casing, formed into funnel-shaped depressions, into which rubber plug-in sockets are inserted when connecting the outer line, which receive mating sleeves connected to the outer line on the inside.

Gemäß Aufgabe vorliegender Erfindung soll ein hochspan­nungsfester, isolierstoffummantelter Transformator, ins­besondere zur Anwendung für Unterflur-Flughafenbefeue­rungsanlagen, geschaffen werden, der trotz einfacher Fertigung und nur geringer Baugröße die Dichtigkeit und geforderte Beständigkeit gegen Meerwasser sowie Laugen und Säuren gewährleisten kann. Die Lösung dieser Aufgabe gelingt erfindungsgemäß durch die Lehre des Anspruchs 1; vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche.According to the object of the present invention, a high-voltage-resistant, insulating-coated transformer, in particular for use in underfloor airport lighting systems, is to be created which, despite simple manufacture and only a small size, can ensure the tightness and required resistance to sea water and alkalis and acids. This object is achieved according to the invention by the teaching of claim 1; advantageous embodiments of the invention are the subject of the dependent claims.

Es hat sich gezeigt, daß der erfindungsgemäße Transfor­mator ohne zusätzliche gesonderte Pufferung des aktiven Teils mit seiner lediglich direkt spritzumgossenen ela­stischen Ummantelung der auf einen allseitig den Eisen­kern beabstandenden Spulenkörper aufgebrachten Wicklung und der Ausspritzung des durch die Distanzstege auf ein­fache Weise gewährleisteten Zwischenraumes zwischen Eisen­kern und Spulenkörper sämtliche gestellten Forderungen nach Dichtigkeit und Beständigkeit gegenüber Erdreich, Meerwasser sowie Laugen und Säuren auch bei größerer Erwärmung des inneren Aktivteils erfüllen kann; das Ein­dringen von Feuchtigkeit entlang der nach außen geführ­ten Anschlußmittel für die äußere Anschlußleitung wird nunmehr auch dadurch eindeutig verhindert, daß die am Spulenkörper vorfixiert gehaltenen und bei der Herstel­lung der Ummantelung bereits miteingespritzten Anschluß-­Gummibuchsen beim Erkalten der Isolierummantelung im Sinne einer Preßverbindung mit hohem Dichtungsdruck von der Spritzgußmasse umschlossen werden. In vorteilhafter Weise werden die Anschluß-Gummibuchsen zur Halterung des zu umspritzenden, zumindest aus Kern, Spulenkörper mit Primär- bzw. Sekundärwicklung und vorfixiert gehaltenen Anschlußmitteln bestehenden Aktivteils zur Halterung in der Spritzform bis zum Erkalten der umspritzten Isolier­ masse mitbenutzt. Zur sicheren Zentrierung des mit hohem Druck eingespritzten Thermoplastes wird vorzugsweise in Richtung der Spulenachse angespritzt.It has been shown that the transformer according to the invention, without additional separate buffering of the active part, with its only directly injection-molded elastic sheathing of the winding applied to a coil former spacing the iron core on all sides and the injection of the space between the iron core and coil former, which is ensured in a simple manner by the spacer webs requirements for tightness and resistance to soil, sea water as well as alkalis and acids can be met even if the inner active part heats up; The penetration of moisture along the outward connection means for the outer connection line is now also clearly prevented by the fact that the connection rubber bushings which are pre-fixed on the coil former and already co-injected during the production of the sheathing during cooling of the insulating sheath in the sense of a press connection with a high sealing pressure of the injection molding compound are enclosed. Advantageously, the connection rubber bushings for holding the part to be overmolded, at least consisting of core, bobbin with primary or secondary winding and pre-fixed connection means existing connection part for holding in the injection mold until the overmolded insulation cools mass shared. For reliable centering of the thermoplastic injected at high pressure, injection is preferably carried out in the direction of the coil axis.

Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung werden im folgenden anhand eines schema­tisch dargestellten Ausführungsbeispiels in der Zeich­nung näher erläutert; darin zeigen:

  • Fig. 1 eine axiale Draufsicht auf die eine Seite eines noch unbewickelten rechteckigen Spulenkörpers;
  • Fig. 2 den Spulenkörper gemäß Fig.1 in einer Ansicht auf die eine Stirnseite bzw. im Schnittbild ge­mäß Schnittverlauf II-II in Fig.1;
  • Fig. 3 eine axiale Ansicht der Oberseite des Spulen­körpers gemäß Fig.1;
  • Fig. 4 eine erste Ausführung einer Anschluß-Gummibuchse;
  • Fig. 5 den Spulenkörper gemäß Fig.2 zusätzlich mit Primär- und Sekundärwicklung sowie mit Eisenkern und vorfixierten Anschluß-Gummibuchsen;
  • Fig. 6 den Spulenkörper gemäß Fig.1 zusätzlich mit Primär- und Sekundärwicklung sowie mit Eisenkern und vorfixerten Anschluß-Gummibuchsen;
  • Fig. 7 den Transformator gemäß Fig.5 mit zusätzlich formgegossener Isolierummantelung;
  • Fig. 8 den Transformator gemäß Fig.6 zusätzlich mit Isolierummantelung;
  • Fig. 9 den Spulenkörper gemäß Fig.3 zusätzlich mit Primär- und Sekundärwicklung sowie mit Eisenkern Eisenkern und vorfixierten Anschluß-Gummibuchsen;
  • Fig. 10 den Transformator gemäß Fig.9 zusätzlich mit formgegossener Isolierummantelung.
  • Fig. 11 eine zweite Ausführung einer Anschluß-Gummi­buchse.
The invention and further advantageous embodiments of the invention are explained in more detail below with reference to a schematically illustrated embodiment in the drawing; show in it:
  • Figure 1 is an axial plan view of one side of a still unwound rectangular bobbin.
  • 2 shows the coil former according to FIG. 1 in a view of the one end face or in the sectional view according to section II-II in FIG. 1;
  • 3 shows an axial view of the upper side of the coil former according to FIG. 1;
  • Fig. 4 shows a first embodiment of a connecting rubber bushing;
  • 5 the coil former according to FIG. 2 additionally with primary and secondary windings as well as with an iron core and pre-fixed connection rubber bushings;
  • 6 the coil former according to FIG. 1 additionally with primary and secondary windings as well as with iron core and pre-fixed connection rubber bushings;
  • 7 shows the transformer according to FIG. 5 with additionally molded insulating jacket;
  • 8 the transformer according to FIG. 6 additionally with an insulating jacket;
  • 9 the coil former according to FIG. 3 additionally with primary and secondary winding and with iron core, iron core and pre-fixed connection rubber bushings;
  • 10 the transformer according to FIG. 9 additionally with molded insulating sheath.
  • Fig. 11 shows a second embodiment of a connecting rubber bushing.

Der bei dem erfindungsgemäßen Transformator verwendete Spulenkörper 2 ist in den Figuren 1 bis 3 dargestellt. Zwischen dem rechten Stirnflansch 21 und dem gegenüber­liegenden Mittelflansch 23 befindet sich der Wickelraum für die Primärwicklung 7, zwischen dem linken Stirn­flansch 22 und dem gegenüberliegenden Mittelflansch 24 befindet sich der Wickelraum für die Sekundärwicklung 8. An der Oberseite des Spulenkörpers 2 sind an dem rechten Stirnflansch 21 zwei Klammern 25,26 zur vorfixierten Halte­rung von Anschluß-Gummibuchsen 3,4 für die Primärwicklung 7 und an der oberen Seite des linken Stirnflansches 22 ist eine Halterungsklammer 27 zur vorfixierten Halterung einer Anschluß-Gummibuchse 5 für die Sekundärwicklung 8 mitan­gespritzt.The coil former 2 used in the transformer according to the invention is shown in FIGS. 1 to 3. The winding space for the primary winding 7 is located between the right end flange 21 and the opposite central flange 23, and the winding space for the secondary winding 8 is located between the left end flange 22 and the opposite central flange 24. At the top of the coil former 2 are 21 on the right end flange 21 two brackets 25, 26 for the pre-fixed mounting of connection rubber bushings 3, 4 for the primary winding 7 and on the upper side of the left end flange 22 a mounting bracket 27 for the pre-fixed mounting of a connection rubber bushing 5 for the secondary winding 8 is also molded.

Fig.4 zeigt eine einzelne Anschluß-Gummibuchse 4, die in ihrem Zentrum ein Anschlußmittel für das jeweilige Wick­lungsende und eine äußere Anschlußleitung aufnimmt und seitlich zu diesem Anschlußmittel einen in die Gummi­hülse eingegossenen Stift 41 aufweist, mit der die An­schluß-Gummibuchse 4 an den in Fig.3 gezeigten Halte­rungen einsteckbar und dadurch vorfixierbar ist.Fig. 4 shows a single connection rubber bushing 4, which receives in its center a connection means for the respective winding end and an outer connection line and has a pin 41 cast into the side of this connection means, with which the connection rubber bushing 4 connects to the in 3 shown mounts can be inserted and thereby pre-fixable.

Als Anschlußmittel ist bei einer ersten Ausführung gemäß Fig.4 eine Steckhülse 10 in die Anschluß-Gummibuchse ein­gelassen. In den unteren, aus der Anschluß-Gummibuchse herausragenden Hülsenteil wird jeweils ein Wicklungsende der Primär- bzw. Sekundärwicklung 7 bzw.8 eingesteckt und angelötet oder verquetscht; in dem oberen Hülsenteil wird ein mit dem abisolierten Teil einer äußeren An­schlußleitung verbundener Stecker eingesteckt, wobei in die Vertiefung 42 der Anschluß-Gummibuchse der abisolier­te Teil der äußeren Anschlußleitung mittelbar oder un­mittelbar eingedrückt ist. Gemäß Fig.11 ist als zweite Ausführung eines vorteilhaft abgedichteten Anschlusses in die Anschluß-Gummibuchse 4 als vorgefertigtes An­schluß-Bauteil eine äußere Anschluß-Zwischenleitung ein­vulkanisiert, deren inneres abisoliertes, aus der An­schluß-Gummibuchse herausragendes Ende 92 mit je einem Wicklungsende der Primär- bzw. Sekundärwicklung 7;8 ver­bunden wird.In a first embodiment according to FIG. 4, a plug-in sleeve 10 is inserted as a connection means into the connection rubber bush. One winding end of the primary or secondary winding 7 or 8 is inserted and soldered or crimped into the lower sleeve part protruding from the connecting rubber bushing; a plug connected to the stripped part of an outer connecting line is inserted into the upper sleeve part, the stripped part of the outer connecting line being pressed directly or indirectly into the recess 42 of the connecting rubber bushing. 11 is a second embodiment of an advantageously sealed connection vulcanized into the connecting rubber bushing 4 as a prefabricated connecting component, the inner stripped end 92 of which is stripped and protrudes from the connecting rubber bushing and is connected to one winding end of the primary and secondary winding 7; 8.

Die Bestückung des gesamten Spulenkörpers 2 mit sämtlichen vorfixiert gehalterten Anschluß-Gummibuchsen ist aus den Figuren 5,6 und 9 entnehmbar. Die Hochspannungs-Primär­wicklung weist zwei getrennte Anschluß-Gummibuchsen 3,4 mit je einem Anschlußmittel 71 bzw.72 zum Anschluß einer äußeren Leitung an die Primärwicklung 7 auf; in der ein­zigen Gummi-Anschlußbuchse 5 für die Sekundärwicklung 8 sind beide Anschlußmittel 81,82 für die äußere Leitung bzw. die Wicklungsenden der Sekundärwicklung 8 zusammen­gefaßt.The assembly of the entire bobbin 2 with all pre-fixed connection rubber bushings can be seen in Figures 5,6 and 9. The high-voltage primary winding has two separate connection rubber bushings 3, 4, each with a connection means 71 and 72, respectively, for connecting an outer line to the primary winding 7; in the single rubber socket 5 for the secondary winding 8, both connection means 81, 82 for the outer line or the winding ends of the secondary winding 8 are combined.

Die Figuren 7,8 zeigen den bewickelten und bestückten Aktivteils des Transformators gemäß Fig.5 bzw. Fig.6 nach der formgegossenen Isolierummantelung; Fig.10 zeigt die Ansicht des Aktivteils des Transformators gemäß Fig.9 nach dessen spritzgegossener Ummantelung.FIGS. 7, 8 show the wound and equipped active part of the transformer according to FIG. 5 or FIG. 6 after the molded insulating jacket; 10 shows the view of the active part of the transformer according to FIG. 9 after its injection-molded casing.

Wie aus Fig.2 ersichtlich, sind erfindungsgemäß an den Innenflächen des rechteckigen Spulenkerns des Spulenkör­pers 2, der den eingesteckten Eisenkern umfaßt, Distanz­stege 28 derart angebracht, daß der Transformator-Eisen­kern l entsprechend der Höhe der Distanzstege 28 in Ab­stand vom Spulenkörper 2 gehalten ist und der dadurch entstehende Zwischenraum zwischen dem Transformator-Eisen­kern l und dem Spulenkörper 2 und damit der Primärwick­wicklung 7 und Sekundärwicklung 8 ebenfalls voll mit dem spritzgegossenen Isolierstoff aus elastischem Thermoplast ausfüllbar ist. Insbesondere ist vorgesehen, daß die Distanzstege 28 außerhalb der Ecken der voreinanderstoßen­ den Innenflächen des rechtwinkligen Spulenkerns des Spu­lenkörpers 2 angeordnet sind, so daß die Kernecken, an denen besonders hohe Feldstärken auftreten, eine sichere Isolation zu der umgebenden Primär- bzw. Sekundärwicklung aufweisen. Wie aus den Figuren 7 bis 10 ersichtlich, kann zusätzlich außen am Blechpaket noch eine Erdungslasche 6 z.B. angeschweißt werden, die aus der spritzgegossenen Isolierummantelung herausragt.As can be seen from FIG. 2, according to the invention, spacer webs 28 are attached to the inner surfaces of the rectangular coil core of the coil body 2, which comprises the inserted iron core, such that the transformer iron core 1 is kept at a distance from the coil body 2 in accordance with the height of the distance webs 28 the resulting space between the transformer iron core 1 and the coil body 2 and thus the primary winding 7 and secondary winding 8 can also be completely filled with the injection-molded insulating material made of elastic thermoplastic. In particular, it is provided that the spacer webs 28 abut one another outside the corners the inner surfaces of the right-angled coil core of the coil body 2 are arranged so that the core corners, at which particularly high field strengths occur, have reliable insulation from the surrounding primary or secondary winding. As can be seen from FIGS. 7 to 10, an earthing strap 6, which protrudes from the injection-molded insulating jacket, can additionally be welded onto the outside of the laminated core, for example.

Bei der Herstellung der spritzgegossenen Isolierummante­lung wird in vorteilhafter Weise der zu umspritzende be­wickelte und bestückte Aktivteil mittels seiner Anschluß-­Gummibuchsen 3-5 in der Spritzform aufgestellt, so daß keine weiteren zusätzlichen Fremddistanzhaltemittel not­wendig sind, die Anlaß für gefährliche inhomogene Zonen in der Isolierummangeltung sein könnten. Vorzugsweise wird die unter hohem Druck eingefüllte Spritzgußmasse in Richtung der Spulenachse angespritzt, derart daß der Transformator in der Spritzform in zentrierter Stellung und somit allseitig gewährleisteter genügender Isolier­ummantelung gehalten ist.In the production of the injection-molded insulating sheathing, the wound and equipped active part to be overmolded is advantageously set up in the injection mold by means of its connecting rubber bushings 3-5, so that no further additional external spacing means are necessary which could give rise to dangerous inhomogeneous zones in the insulating sheathing . The injection molding compound filled in under high pressure is preferably injected in the direction of the coil axis, so that the transformer is held in the injection mold in the centered position and thus sufficient insulation sheathing guaranteed on all sides.

Claims (7)

1. Transformator mit gegossener Isolierummantelung, ins­besondere für eine Unterflur-Flugplatzbefeuerung, mit den Mekmalen: a) Primärwicklung und Sekundärwicklung sind auf einen Kunststoff-Spulenkörper (2) gewickelt; b) an den Kunststoff-Spulenkörper (2) sind Anschluß-­Gummibuchsen (3-5) vorfixiert gehalten, die mit den Wicklungsenden der Primärwiklung (7) und der Sekundär­wicklung (8) verbundene Anschlußmittel (71,72;81,82 bzw.91,92) für äußere Anschlußleitungen aufnehmen; c) der zumindest aus bewickeltem Spulenkörper (2), Trans­formator-Eisenkern (1) und den vorfixiert gehaltenen Anschluß-Gummibuchsen (3-5) bestehende Aktivteil ist direkt mit einem elastischen Thermoplast als einziger Isolierummantelung spritzumgossen; d) der Transformator-Eisenkern (1) ist durch an die Innen­flächen des rechteckigen Spulenkerns des Spulenkörpers (2) angeformte Distanzstege (28) derart in Abstand gehalten, daß der Zwischenraum voll mit dem elasti­schem Thermoplast ausspritzbar ist. 1. Transformer with cast insulating jacket, in particular for underfloor airfield lighting, with the following features: a) primary winding and secondary winding are wound on a plastic bobbin (2); b) on the plastic bobbin (2) connection rubber bushings (3-5) are held pre-fixed, the connection means (71,72; 81,82 and 91) connected to the winding ends of the primary winding (7) and the secondary winding (8) , 92) for external connection lines; c) the at least consisting of wound bobbin (2), transformer iron core (1) and the pre-fixed connection rubber bushings (3-5) existing active part is injection molded directly with an elastic thermoplastic as the only insulating sheath; d) the transformer iron core (1) is spaced by spacers (28) molded onto the inner surfaces of the rectangular coil core of the coil body (2) in such a way that the intermediate space can be fully sprayed out with the elastic thermoplastic. 2. Transformator nach Anspruch 1 mit dem Merkmal: e) An die Stirnflansche (21 bzw.22) des Spulenkörpers sind Halterungen (25,26 bzw.27) angeformt, auf die die Anschluß-Gummibuchsen (3-5) aufgesteckt sind. 2. Transformer according to claim 1 with the feature: e) Brackets (25, 26 and 27, respectively) are formed on the end flanges (21 and 22) of the coil body, respectively, onto which the connection rubber bushings (3-5) are attached. 3. Transformator nach Anspruch 1 und/oder 2 mit dem Merkmal: f) Die Distanzstege (28) sind an den Innenflächen des rechteckigen Spulenkerns des Spulenkörpers (2) außer­halb dessen Ecken angeformt. 3. Transformer according to claim 1 and / or 2 with the feature: f) The spacer webs (28) are formed on the inner surfaces of the rectangular coil core of the coil body (2) outside the corners thereof. 4. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß als Anschlußmittel eine in die Anschluß-Gummibuchse eingelassene Steckhülse (72) vorgesehen ist (Fig.4).4. Transformer according to claim 1, characterized in that a plug-in sleeve (72) inserted into the connection rubber bushing is provided as the connection means (FIG. 4). 5. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß als Anschlußmittel in die Anschluß-Gummibuchse eine Anschlußleitung 9 mit einem innen herausragenden abisolierten Leitungsteil 92 und einem isolierummantelten, in die Anschluß-Gummibuchse einvulkanisierten Leitungsteil vorgesehen ist (Fig.11).5. Transformer according to claim 1, characterized in that a connecting line 9 with an internally protruding stripped line part 92 and an insulated jacket, vulcanized into the connection rubber bushing is provided as a connection means in the connection rubber socket (Fig. 11). 6. Verfahren zur Herstellung eines Transformators nach zumindest einem der Ansprüche 1-5 mit dem Merkmal: g) Der zu umspritzene, aus zumindest Eisenkern, Spulen­körper mit Wicklung und vorfixierten Anschluß-Gummi­buchsen bestehende Aktivteil wird über die am Spulen­körper vorfixierten Anschluß-Gummibuchsen in der Spritzform fixiert gehalten. 6. A method for producing a transformer according to at least one of claims 1-5 with the feature: g) The active part to be extrusion-coated, consisting of at least iron core, coil body with winding and pre-fixed connection rubber bushings, is held fixed in the injection mold via the connection rubber bushings pre-fixed on the coil body. 7. Verfahren zur Herstellung eines Transformators nach Anspruch 6 mit dem Merkmal: h) Der Aktivteil wird in Richtung der Spulenachse des Spulenkörpers angespritzt. 7. A method for producing a transformer according to claim 6 with the feature: h) The active part is injection molded in the direction of the coil axis of the coil body.
EP86111589A 1985-09-03 1986-08-21 Transformer with a moulded insulative encapsulation Expired EP0217103B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86111589T ATE43454T1 (en) 1985-09-03 1986-08-21 TRANSFORMER WITH CAST INSULATION JACKET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3531445 1985-09-03
DE3531445 1985-09-03

Publications (2)

Publication Number Publication Date
EP0217103A1 true EP0217103A1 (en) 1987-04-08
EP0217103B1 EP0217103B1 (en) 1989-05-24

Family

ID=6280041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86111589A Expired EP0217103B1 (en) 1985-09-03 1986-08-21 Transformer with a moulded insulative encapsulation

Country Status (7)

Country Link
US (1) US4763095A (en)
EP (1) EP0217103B1 (en)
JP (1) JPS6255914A (en)
AT (1) ATE43454T1 (en)
DE (1) DE3663601D1 (en)
DK (1) DK415186A (en)
FI (1) FI862409A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056214A (en) * 1989-12-19 1991-10-15 Mark Iv Industries, Inc Method of making a molded transformer enclosure
US5589808A (en) * 1993-07-28 1996-12-31 Cooper Industries, Inc. Encapsulated transformer
US5528091A (en) * 1994-05-16 1996-06-18 Xolox Corporation Swing-type actuator and device for locating terminal pins relative to coil for same
DE19613127A1 (en) * 1996-04-02 1997-10-09 Sel Alcatel Ag Coil former for the stator winding of a small electric motor and small electric motor produced with it
US5853643A (en) * 1996-07-19 1998-12-29 Bauer; Scott V. Method for constructing a liquid-impervious electric motor assembly
MY120386A (en) * 1999-07-28 2005-10-31 Samsung Electronics Co Ltd High voltage transformer for microware oven and method of manufacturing therefor.
EP2426679A1 (en) * 2010-09-03 2012-03-07 RS Isolsec, S.L. Voltage/current transformer with integral resin molded housing and its manufacturing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725539A (en) * 1954-05-21 1955-11-29 Elastic Stop Nut Corp Transformers
FR1525962A (en) * 1967-01-26 1968-05-24 Augier Sa Transformer for public lighting
US4019167A (en) * 1975-05-19 1977-04-19 Amerace Corporation Encapsulated transformer
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
FR2529376A1 (en) * 1982-06-28 1983-12-30 Siemens Ag SMALL TRANSFORMER

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525966A (en) * 1968-07-24 1970-08-25 Square D Co Encapsulated coil and method of making same and spacer for use during encapsulation
DE7309528U (en) * 1973-03-13 1973-06-07 Siemens Ag COIL IN PARTICULAR EXCITER COIL FOR LYE PUMPS
US3909759A (en) * 1974-04-08 1975-09-30 Gen Electric Bushing well for instrument transformer and transformers including such well
US3959760A (en) * 1974-04-08 1976-05-25 General Electric Company Dry type instrument transformer with potential tap and connector therefor
US4161776A (en) * 1977-07-13 1979-07-17 Denki Onkyo Co., Ltd. Flyback transformer with high tension connector
JPS608412Y2 (en) * 1980-03-12 1985-03-25 三洋電機株式会社 flyback transformer
NL8105830A (en) * 1981-12-24 1983-07-18 Philips Nv METHOD FOR COATING AN INDUSTRIAL STABILIZATION BALLAST WITH AN INSULATING LAYER AND AN INDUSTRIAL STABILIZATION BALLAST COVERED BY AN INSULATING LAYER ACCORDING TO THAT METHOD.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725539A (en) * 1954-05-21 1955-11-29 Elastic Stop Nut Corp Transformers
FR1525962A (en) * 1967-01-26 1968-05-24 Augier Sa Transformer for public lighting
US4019167A (en) * 1975-05-19 1977-04-19 Amerace Corporation Encapsulated transformer
GB2089764A (en) * 1980-11-25 1982-06-30 Legrand Sa Coil former for transformer
FR2529376A1 (en) * 1982-06-28 1983-12-30 Siemens Ag SMALL TRANSFORMER

Also Published As

Publication number Publication date
DK415186A (en) 1987-03-04
DE3663601D1 (en) 1989-06-29
ATE43454T1 (en) 1989-06-15
FI862409A0 (en) 1986-06-05
JPS6255914A (en) 1987-03-11
DK415186D0 (en) 1986-09-01
US4763095A (en) 1988-08-09
EP0217103B1 (en) 1989-05-24
FI862409A (en) 1987-03-04

Similar Documents

Publication Publication Date Title
DE3043773C2 (en) Ignition coil for an internal combustion engine
DE2312670A1 (en) CONNECTION FOR ELECTRICAL CABLES AND METHOD OF MANUFACTURING IT
DE4328089C2 (en) Method for producing an ignition coil unit for an internal combustion engine, and ignition coil unit produced using this method
EP0217103B1 (en) Transformer with a moulded insulative encapsulation
DE69915808T2 (en) STRIPED INDUCTION COIL WITH IMPROVED HEAT TRANSFER AND SHORT-CIRCULAR STRENGTH
EP0913882B1 (en) Method for insulating an electrical device
WO1998013914A1 (en) Restrain coil for ignition systems
DE2118000A1 (en) Solid electrolytic capacitor and process for its manufacture
DE2354087A1 (en) OIL-FILLED ELECTRICAL APPLIANCE AND METHOD FOR MANUFACTURING IT
DE8525177U1 (en) Transformer with cast insulating jacket
DE4125552C2 (en) Coated ignition coil
DE2015988C3 (en) End termination for power cables insulated with a thermoplastic or thermoelastic plastic
DE4136248C2 (en) Coil connector
DE2925853A1 (en) Electrical plug socket moulding - using soft polymer around cable and hard polymer around contact elements
EP0062167B2 (en) Electrical component centered and adjusted in a casing
DE2626906B2 (en) Low-voltage cable tap for connecting the conductors of a main cable to the conductors of a branch cable
DE3932750C2 (en) Inductive component for separable transformers
EP0473629B1 (en) Method for producing a coil for transformers, in particular high-voltage transformers
DE915351C (en) Method for sealing a connection between a cast plastic body and a solid, preferably metallic body in the case of electrical objects, in particular in the case of ignition coils
DE4338537A1 (en) Inductive electrical converter for medium voltage
DE2323967A1 (en) CONNECTOR FOR AN ELECTRICAL CONNECTION
DE3512657A1 (en) Gas-insulated high-voltage current transformer having a primary conductor of U-shaped construction
DE3144528A1 (en) Ignition coil, especially for internal-combustion engines of motor vehicles
DE2911402A1 (en) Capacitor bushing insulator - with plastic foam filling gap between conductive bolt and wound capacitor
EP0552168B1 (en) High-voltage terminals for ignition coils

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19870127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL

17Q First examination report despatched

Effective date: 19880609

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19890524

Ref country code: GB

Effective date: 19890524

Ref country code: NL

Effective date: 19890524

REF Corresponds to:

Ref document number: 43454

Country of ref document: AT

Date of ref document: 19890615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3663601

Country of ref document: DE

Date of ref document: 19890629

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19890821

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19890831

Ref country code: LI

Effective date: 19890831

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19900822

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900827

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901025

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19910831

BERE Be: lapsed

Owner name: SIEMENS A.G. BERLIN UND MUNCHEN

Effective date: 19910831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST