EP0562495B1 - Transformer or inductor with shaped pieces of insulating material at the coil end turns - Google Patents

Transformer or inductor with shaped pieces of insulating material at the coil end turns Download PDF

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Publication number
EP0562495B1
EP0562495B1 EP93104587A EP93104587A EP0562495B1 EP 0562495 B1 EP0562495 B1 EP 0562495B1 EP 93104587 A EP93104587 A EP 93104587A EP 93104587 A EP93104587 A EP 93104587A EP 0562495 B1 EP0562495 B1 EP 0562495B1
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EP
European Patent Office
Prior art keywords
transformer
series reactor
reactor according
coil
coils
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93104587A
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German (de)
French (fr)
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EP0562495A2 (en
EP0562495A3 (en
Inventor
Peter Horn
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Knobel AG Lichttechnische Komponenten
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Knobel AG Lichttechnische Komponenten
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Publication of EP0562495A3 publication Critical patent/EP0562495A3/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/326—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures specifically adapted for discharge lamp ballasts

Definitions

  • the invention relates to a transformer, in particular for low-voltage halogen lamps, or a symmetrical fluorescent lamp ballast choke, with two coils arranged one above the other, the winding heads of which each protrude from the laminated core of the transformer or the ballast choke, and with insulating material moldings arranged on both sides of the sheet metal pack on the winding heads .
  • Such a transformer or a series choke is e.g. known from EP Patent No. 121 676.
  • several shaped pieces are required for each winding head in the case of coils lying one above the other. Furthermore, the coils are only loosely inserted in the fittings in the known arrangement.
  • the invention has for its object to provide a transformer or a series reactor, which is easier and cheaper to manufacture.
  • each insulating molded part is formed in one piece and comprises a partition wall which isolates the two coils in the area of the winding overhangs and fixation means which are arranged on both sides and which respectively clamp the corresponding coil.
  • the one-piece shaped pieces with the fixing means make it possible to fasten both coils to the shaped pieces with the winding heads.
  • the result is a dimensionally stable unit consisting of coils and shaped pieces, which can be handled as such and which can subsequently be fitted with the core sheets. This allows simple manufacture of the transformer or the series choke.
  • a plurality of tongues projecting from the partition are preferably provided as the fixing means.
  • resilient tongues are preferably provided on the outside of the dividing wall, each of which is provided at its free end with a projection which overlaps the coil. This allows the coil to be fastened to the fitting by simply snapping the coil into place.
  • Figure 1 shows the upper part of a transformer, in particular for halogen lamps, or a symmetrical ballast for fluorescent lamps.
  • the winding heads of the coils 2, 3 protrude from the core package 1 from the laminated core.
  • the coils are each provided with a foil insulation 21, which in each case at the winding head ends.
  • An insulating material molding is provided to isolate the coils 2, 3 which are exposed in the area of the winding head.
  • This has a partition 4 for the insulation of the coils.
  • Holding means are arranged on the partition, which fix the two coils to the shaped piece.
  • these fixing means for the coil 2 comprise the tongues 6, 7 and 9.
  • the tongues 5, 8 and 10 are provided as the fixing means for the coil 3, the latter not being visible in FIG.
  • the coils are held firmly on the fitting by means of the tongues mentioned.
  • the winding heads of the coils 2, 3 are fixed in an identical shaped piece.
  • These shaped pieces with fixing means thus result in a stable unit from the two coils and the shaped pieces, which is stable even without the core sheets.
  • FIGS. 2 to 6 show different views of a specific exemplary embodiment of the one-piece molded part which is only shown schematically in FIG.
  • Figure 2 shows a side view corresponding to a view according to arrow A of Figure 1.
  • the tongues 5, 6, 9 and 10 are formed, which are arranged in this embodiment at the lower end of the partition, ie adjacent to the laminated core.
  • An end plate 15 is arranged at the upper end of the partition and parallel to the end face of the laminated core, which holds means for the wire ends of the coils 2, 3.
  • side walls 11, 12 and 13 are also arranged.
  • the side walls 12 and 13 form a slot between them, which serve as a wire guide for the wire ends of the coil 3, which must be guided to the top of the end plate and which must maintain predetermined insulation distances.
  • Such wire guide elements 14, 26 are also provided on the inside on the underside of the end plate 15.
  • FIG 3 shows a view of the insulating molding according to the arrow B of Figure 1.
  • the rigid tongue 10 is designed as a hollow box with the cavity 18 that is open on one side.
  • This cavity 18 is intended to accommodate a thermal fuse.
  • the thermal fuse In this box, which is somewhat spaced from the laminated core, the thermal fuse has good thermal contact with the copper of the coil 3.
  • the thermal fuse is inserted before the entire transformer is impregnated and this fuse is in the impregnating agent, which fills the cavity 18, which is only open on one side, included.
  • FIG. 4 shows a plan view of the end plate 15 corresponding to the arrow C in FIG. 1.
  • the holding means for the wire ends of the coils 2 and 3 can be seen. Slots are provided in the formations 16, 17, into which the wire ends of the one coil can be inserted. Terminal lugs are then crimped onto the formations and the wire ends.
  • wire holders designed as recesses 20, 24 intended.
  • wire brackets are designed to be resilient in that further recesses 22, 23 are provided in the end plate 15 to the recesses 20 and 24, respectively, whereby a springing of the sections of the end plate adjoining the recesses is made possible, which results in the resilient action of the in leads the recesses 20, 24 arranged wire ends.
  • the fitting shown can be used on both winding heads of the transformer. In the case of a transformer, only the wire holding means of one shaped piece are required, since the wire ends of both coils are led out on the same side of the transformer. In the case of a series choke, on the other hand, the wire holding means 16, 17 of both fittings are used, since in the case of the series choke the wire ends of the two coils are usually led out on opposite end faces of the choke. In this case, the wire holding means 20, 24 of both fittings are not required.
  • Figure 5 shows a bottom view of the fitting described so far, i.e. in the direction of arrow D of FIG. 1.
  • the partition and the fixing means which are formed by the tongues 6, 7, 9 and 5, 8, 10, are again visible.
  • Figure 6 also shows a section through the fitting along the line A-A of Figure 3.
  • an end cap can be pushed over the fitting.
  • This end cap covers the winding head of the other coil.
  • This end cap can be designed as a simple plastic part, which is pushed onto the molding, for example from the direction corresponding to the arrow B in FIG.
  • the end cap is preferably designed as a terminal housing which holds the connection terminals for the primary and secondary winding of the Transformer.
  • Such a terminal housing is shown in section in FIG.
  • the terminal housing is designed as a one-piece plastic housing 30, in which recesses 31 are arranged, in which screw terminals can be arranged.
  • corresponding recesses 32 and 33 are provided in the plastic housing 30.
  • the recesses 32 are preferably covered with a cover after the transformer has been installed, since only the screws accessible via the recesses 33 have to be actuated to connect the transformer.
  • the fitting according to Figure 2 is also shown, from which it can be seen how the terminal housing is pushed onto the fitting. This is done in such a way that the wire ends held by the wire holding means 16, 17, 20, 24 extend directly into the screw terminals. This results in a particularly simple assembly of the transformer.
  • FIG. 8 shows a view into the interior of the terminal housing in the direction of the screw terminals.
  • a chamber 35 can be seen, which is used to arrange a thermal switch.
  • a one-piece plastic part 36 is preferably provided for holding such a thermal switch, which can be inserted into the chamber 35 and which is indicated in FIG. 8.
  • the thermal switch 37 is shown only as a block.
  • the holder 36 also has a section which carries the right outer screw terminal 41, which in this case is designed as two screw connections which are axially separated and electrically insulated from one another. This is because a line must first be routed from the input terminal of the transformer to the thermal switch and then a line from the thermal switch back to the second terminal, to which the corresponding wire end of the coil is attached.
  • the holder 36 has corresponding wire guide means 38, 39 for guiding the lines mentioned.
  • This one piece Holder 36 made of plastic, which can be pre-wired with the thermal switch and the screw terminals mentioned, further simplifies the assembly of the transformer.
  • the fully wired cold 36 is inserted into the terminal housing 30 for this purpose.
  • the clamp housing 30 prepared in this way can then be pushed onto the shaped piece which carries the wire ends of the coils in the correct position. When the terminal housing is pushed on, the wire ends are inserted into the associated screw terminals. Subsequently, only the corresponding screws of the screw terminals have to be tightened and the screw openings 32 covered with the cover.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

An integral moulding having a separating wall (4) for separating the two coils (2,3) is provided on each winding overhang of a transformer or of a balanced series inductor. Provided on the separating wall (4) are fixing means (6,7,9) which fix one coil (2) on the moulding. Such fixing means are also provided for the other coil (3). In this way, a stable unit is created by means of the moulding and the coils, which unit can subsequently be fitted with the core plates (1). This simplifies the production of the transformer or the series inductor. <IMAGE>

Description

Die Erfindung betrifft einen Transformator, insbesondere für Halogen-Niederspannungslampen, oder eine symmetrische Leuchtstofflampen-Vorschaltdrossel, mit zwei übereinander angeordneten Spulen, deren Wickelköpfe jeweils aus dem Blechpaket des Transformators oder der Vorschaltdrossel ragen, und mit beidseits des Blechpaketes an den Wickelköpfen angeordneten Isolierstoff-Formstücken.The invention relates to a transformer, in particular for low-voltage halogen lamps, or a symmetrical fluorescent lamp ballast choke, with two coils arranged one above the other, the winding heads of which each protrude from the laminated core of the transformer or the ballast choke, and with insulating material moldings arranged on both sides of the sheet metal pack on the winding heads .

Ein solcher Transformator oder eine solche Vorschaltdrossel ist z.B. aus der EP-Patentschrift Nr. 121 676 bekannt. Bei der dort gezeigten Anordnung werden bei übereinanderliegenden Spulen für jeden Wickelkopf mehrere Formstücke benötigt. Ferner sind bei der bekannten Anordnung die Spulen nur lose in den Formstücken eingelegt.Such a transformer or a series choke is e.g. known from EP Patent No. 121 676. In the arrangement shown there, several shaped pieces are required for each winding head in the case of coils lying one above the other. Furthermore, the coils are only loosely inserted in the fittings in the known arrangement.

Der Erfindung liegt die Aufgabe zugrunde, einen Transformator oder eine Vorschaltdrossel zu schaffen, welche einfacher und kostengünstiger herstellbar ist.The invention has for its object to provide a transformer or a series reactor, which is easier and cheaper to manufacture.

Dies wird bei einem Transformator oder einer Vorschaltdrossel der eingangs genannten Art dadurch erreicht, dass jedes Isolierstoff-Formstück einstückig ausgebildet ist und eine die beiden Spulen im Bereich der Wickelköpfe voneinander isolierende Trennwand und beidseits an dieser angeordnete, jeweils die entsprechende Spule festklemmende, Fixierungsmittel umfasst.This is achieved in a transformer or a series choke of the type mentioned at the outset in that each insulating molded part is formed in one piece and comprises a partition wall which isolates the two coils in the area of the winding overhangs and fixation means which are arranged on both sides and which respectively clamp the corresponding coil.

Die einstückigen Formstücke mit den Fixierungsmitteln erlauben es, beide Spulen jeweils mit den Wickelköpfen an den Formteilen zu befestigen. Es entsteht eine formstabile Einheit aus Spulen und Formstücken, welche als solche Einheit gehandhabt werden kann und welche nachfolgend mit den Kernblechen bestückt werden kann. Dies erlaubt eine einfache Herstellung des Transformators oder der Vorschaltdrossel.The one-piece shaped pieces with the fixing means make it possible to fasten both coils to the shaped pieces with the winding heads. The result is a dimensionally stable unit consisting of coils and shaped pieces, which can be handled as such and which can subsequently be fitted with the core sheets. This allows simple manufacture of the transformer or the series choke.

Bevorzugterweise sind als Fixierungsmittel eine Mehrzahl von der Trennwand abstehende Zungen vorgesehen. Vorzugsweise sind dabei aussen an der Trennwand angeordnete, federnde Zungen vorgesehen, welche an ihrem freien Ende jeweils mit einem die Spule übergreifenden Vorsprung versehen sind. Dies erlaubt eine Befestigung der Spule an dem Formstück durch einfaches Einrasten der Spule.A plurality of tongues projecting from the partition are preferably provided as the fixing means. In this case, resilient tongues are preferably provided on the outside of the dividing wall, each of which is provided at its free end with a projection which overlaps the coil. This allows the coil to be fastened to the fitting by simply snapping the coil into place.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen naher erläutert. Dabei zeigt

  • Figur 1 eine schematische Ansicht des oberen Wickelkopfes eines Transformators oder einer symmetrischen Vorschaltdrossel;
  • Figur 2 ein Ausführungsbeispiel des Formstückes in einer Ansicht gemäss Pfeil A von Figur 1;
  • Figur 3 das Formstück gemäss Figur 2 in der Ansicht aus Richtung B von Figur 1;
  • Figur 4 dasselbe Formstück in Draufsicht gemäss Pfeil C von Figur 1;
  • Figur 5 dasselbe Formstück von unten gemäss Pfeil D von Figur 1;
  • Figur 6 einen Vertikalschnitt durch das Formstück;
  • Figur 7 einen Vertikalschnitt durch ein Klemmengehäuse zum Aufschieben auf das Formstück nach den Figuren 2 bis 6;
  • Figur 8 eine Ansicht in das Innere des Klemmengehäuses von Figur 7; mit einer Halterung für einen Thermo-Schalter, der in dem Klemmengehäuse angeordnet wird.
Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. It shows
  • Figure 1 is a schematic view of the upper winding head of a transformer or a symmetrical series choke;
  • Figure 2 shows an embodiment of the fitting in a view according to arrow A of Figure 1;
  • Figure 3 shows the fitting according to Figure 2 in the view from direction B of Figure 1;
  • Figure 4 shows the same fitting in plan view according to arrow C of Figure 1;
  • Figure 5 shows the same fitting from below according to arrow D of Figure 1;
  • Figure 6 is a vertical section through the fitting;
  • FIG. 7 shows a vertical section through a terminal housing for being pushed onto the shaped piece according to FIGS. 2 to 6;
  • FIG. 8 shows a view into the interior of the terminal housing from FIG. 7; with a holder for a thermal switch, which is arranged in the terminal housing.

Figur 1 zeigt den oberen Teil eines Transformators, insbesondere für Halogenlampen, oder einer symmetrischen Vorschaltdrossel für Leuchtstofflampen. Aus dem Kernpaket 1 ragen die Wickelköpfe der Spulen 2, 3 aus dem Blechpaket. Die Spulen sind dabei jeweils mit einer Folienisolation 21 versehen, welche jeweils beim Wickelkopf endet. Zur Isolation der im Bereich des Wickelkopfes freiliegenden Spulen 2, 3 voneinander ist ein Isolierstoff-Formstück vorgesehen. Dieses weist zur Isolation der Spulen eine Trennwand 4 auf. An der Trennwand sind Haltemittel angeordnet, welche die beiden Spulen an dem Formstück fixieren. Bei dem schematisch dargestellten Beispiel von Figur 1 umfassen diese Fixierungsmittel für die Spule 2 die Zungen 6, 7 und 9. Für die Spule 3 sind als Fixierungsmittel die Zungen 5, 8 und 10 vorgesehen, wobei letztere in Figur 1 nicht sichtbar ist. Mittels der genannten Zungen werden die Spulen fest am Formstück gehalten. Am unteren, nicht dargestellten Ende des Transformators werden die Wickelköpfe der Spulen 2, 3 in einem identischen Formstück fixiert. Durch diese Formstücke mit Fixierungsmitteln ergibt sich somit eine stabile Einheit aus den beiden Spulen und den Formstücken, welche auch ohne die Kernbleche stabil ist. Dies bedeutet, dass also zunächst ein solcher Verbund aus Spulen und Formstücken hergestellt werden kann, welcher erst nachfolgend mit den Blechen bestückt wird. Dies erlaubt eine besonders einfache Herstellung des Transformators oder der Drossel. Bevorzugterweise ist jeweils eine feste Zunge 9, 10 vorgesehen sowie federnde Zungen 6, 7; 5, 8, welche die Spulen mittels angeformter Haken übergreifen. Auf diese Weise kann jede Spule auf einfache Weise durch Hineindrücken an dem Formstück fixiert werden, was die Montage des genannten stabilen Verbundes sehr einfach macht.Figure 1 shows the upper part of a transformer, in particular for halogen lamps, or a symmetrical ballast for fluorescent lamps. The winding heads of the coils 2, 3 protrude from the core package 1 from the laminated core. The coils are each provided with a foil insulation 21, which in each case at the winding head ends. An insulating material molding is provided to isolate the coils 2, 3 which are exposed in the area of the winding head. This has a partition 4 for the insulation of the coils. Holding means are arranged on the partition, which fix the two coils to the shaped piece. In the example of FIG. 1 shown schematically, these fixing means for the coil 2 comprise the tongues 6, 7 and 9. The tongues 5, 8 and 10 are provided as the fixing means for the coil 3, the latter not being visible in FIG. The coils are held firmly on the fitting by means of the tongues mentioned. At the lower end of the transformer, not shown, the winding heads of the coils 2, 3 are fixed in an identical shaped piece. These shaped pieces with fixing means thus result in a stable unit from the two coils and the shaped pieces, which is stable even without the core sheets. This means that such a composite of coils and shaped pieces can first be produced, which is only subsequently fitted with the metal sheets. This allows a particularly simple manufacture of the transformer or the choke. A fixed tongue 9, 10 and resilient tongues 6, 7; 5, 8, which overlap the coils by means of molded hooks. In this way, each coil can be fixed in a simple manner by pushing it into the shaped piece, which makes the assembly of the stable connection mentioned very easy.

Die Figuren 2 bis 6 zeigen verschiedene Ansichten eines konkreten Ausführungsbeispiels des in Figur 1 nur schematisch dargestellten einstückigen Formstücks.FIGS. 2 to 6 show different views of a specific exemplary embodiment of the one-piece molded part which is only shown schematically in FIG.

Figur 2 zeigt dabei eine Seitenansicht entsprechend einer Ansicht gemäss Pfeil A von Figur 1. An der Trennwand 4 sind dabei die Zungen 5, 6, 9 und 10 angeformt, welche bei dieser Ausführung am unteren Ende der Trennwand, d.h. anliegend am Blechpaket angeordnet sind. Am oberen Ende der Trennwand und parallel zur Stirnfläche des Blechpaketes ist eine Abschlussplatte 15 angeordnet, welche Haltemittel für die Drahtenden der Spulen 2,3 trägt. An der Trennwand 4 sind ferner Seitenwände 11, 12 und 13 angeordnet. Die Seitenwände 12 und 13 bilden zwischen sich einen Schlitz, der als Drahtführung für die Drahtenden der Spule 3 dienen, welche an die Oberseite der Abschlussplatte geführt werden müssen und welche dabei vorbestimmte Isolationsabstände einhalten müssen. Auch innen an der Unterseite der Abschlussplatte 15 sind solche Drahtführungselemente 14, 26 vorgesehen.Figure 2 shows a side view corresponding to a view according to arrow A of Figure 1. On the partition 4, the tongues 5, 6, 9 and 10 are formed, which are arranged in this embodiment at the lower end of the partition, ie adjacent to the laminated core. An end plate 15 is arranged at the upper end of the partition and parallel to the end face of the laminated core, which holds means for the wire ends of the coils 2, 3. On the partition 4, side walls 11, 12 and 13 are also arranged. The side walls 12 and 13 form a slot between them, which serve as a wire guide for the wire ends of the coil 3, which must be guided to the top of the end plate and which must maintain predetermined insulation distances. Such wire guide elements 14, 26 are also provided on the inside on the underside of the end plate 15.

Figur 3 zeigt eine Ansicht des Isolierstoff-Formstücks entsprechend dem Pfeil B von Figur 1. Darin ist wiederum die Trennwand 4 ersichtlich, mit der daran angeordneten Abschlussplatte 15 und den Seitenwänden 12, 13 und 19. Ferner sind die federnden Zungen 5 und 8 mit den die Spule übergreifenden Vorsprüngen ersichtlich. Die starre Zunge 10 ist bei diesem Ausführungsbeispiel als einseitig offener, hohler Kasten mit dem Hohlraum 18 ausgebildet. Dieser Hohlraum 18 ist zur Aufnahme einer Thermo-Sicherung bestimmt. In diesem Kasten, welcher vom Blechpaket etwas beabstandet ist, hat die Thermo-Sicherung guten thermischen Kontakt zum Kupfer der Spule 3. In den Hohlraum 18 wird die Thermo-Sicherung vor dem Imprägnieren des ganzen Transformators eingelegt und diese Sicherung wird in das Imprägnierungsmittel, welches den nur einseitig offenen Hohlraum 18 auffüllt, eingeschlossen.Figure 3 shows a view of the insulating molding according to the arrow B of Figure 1. This again shows the partition 4, with the end plate 15 arranged thereon and the side walls 12, 13 and 19. Furthermore, the resilient tongues 5 and 8 with the projections overlapping the coil. In this exemplary embodiment, the rigid tongue 10 is designed as a hollow box with the cavity 18 that is open on one side. This cavity 18 is intended to accommodate a thermal fuse. In this box, which is somewhat spaced from the laminated core, the thermal fuse has good thermal contact with the copper of the coil 3. In the cavity 18, the thermal fuse is inserted before the entire transformer is impregnated and this fuse is in the impregnating agent, which fills the cavity 18, which is only open on one side, included.

Figur 4 zeigt eine Draufsicht auf die Abschlussplatte 15 entsprechend dem Pfeil C in Figur 1. Ersichtlich sind dabei insbesondere die Haltemittel für die Drahtenden der Spulen 2 bzw. 3. Diese Haltemittel sind einerseits als Ausformungen 16, 17 der Anschlussplatte 15 ausgeführt. In den Ausformungen 16, 17 sind Schlitze vorgesehen, in welche die Drahtenden der einen Spule einlegbar sind. An die Ausformungen und die Drahtenden werden nachfolgend Anschlussfahnen angekrimpt. Für die Anschlussdrähte der zweiten Spule, insbesondere für die Anschlussdrähte einer Transformator-Sekundärwicklung sind als Ausnehmungen 20, 24 ausgebildete Drahthalterungen vorgesehen. Diese Drahthalterungen sind federnd ausgestaltet, indem in der Abschlussplatte 15 an die Ausnehmungen 20, bzw. 24, anschliessend jeweils weitere Ausnehmungen 22, 23 vorgesehen sind, wodurch ein Federn der an die Ausnehmungen angrenzenden Abschnitte der Abschlussplatte ermöglicht wird, was zur federnden Beaufschlagung der in den Ausnehmungen 20, 24 angeordneten Drahtenden führt. Das gezeigte Formstück kann an beiden Wickelköpfen des Transformators verwendet werden. Bei einem Transformator werden nur die Drahthaltemittel des einen Formstückes benötigt, da die Drahtenden beider Spulen an derselben Seite des Transformators herausgeführt werden. Bei einer Vorschaltdrossel hingegen kommen die Drahthaltemittel 16, 17 beider Formstücke zur Verwendung, da bei der Vorschaltdrossel die Drahtenden der beiden Spulen in der Regel an entgegengesetzten Stirnseiten der Drossel herausgeführt werden. In diesem Falle werden die Drahthaltemittel 20, 24 beider Formstücke nicht benötigt.FIG. 4 shows a plan view of the end plate 15 corresponding to the arrow C in FIG. 1. In particular, the holding means for the wire ends of the coils 2 and 3 can be seen. Slots are provided in the formations 16, 17, into which the wire ends of the one coil can be inserted. Terminal lugs are then crimped onto the formations and the wire ends. For the connecting wires of the second coil, in particular for the connecting wires of a transformer secondary winding, there are wire holders designed as recesses 20, 24 intended. These wire brackets are designed to be resilient in that further recesses 22, 23 are provided in the end plate 15 to the recesses 20 and 24, respectively, whereby a springing of the sections of the end plate adjoining the recesses is made possible, which results in the resilient action of the in leads the recesses 20, 24 arranged wire ends. The fitting shown can be used on both winding heads of the transformer. In the case of a transformer, only the wire holding means of one shaped piece are required, since the wire ends of both coils are led out on the same side of the transformer. In the case of a series choke, on the other hand, the wire holding means 16, 17 of both fittings are used, since in the case of the series choke the wire ends of the two coils are usually led out on opposite end faces of the choke. In this case, the wire holding means 20, 24 of both fittings are not required.

Figur 5 zeigt eine Ansicht des bisher beschriebenen Formstückes von unten, d.h. in Richtung des Pfeils D von Figur 1. Ersichtlich sind dabei wiederum die Trennwand und die Fixierungsmittel, welche von den Zungen 6, 7, 9 bzw. 5, 8, 10 gebildet werden.Figure 5 shows a bottom view of the fitting described so far, i.e. in the direction of arrow D of FIG. 1. The partition and the fixing means, which are formed by the tongues 6, 7, 9 and 5, 8, 10, are again visible.

Figur 6 zeigt ferner einen Schnitt durch das Formstück entlang der Linie A-A von Figur 3.Figure 6 also shows a section through the fitting along the line A-A of Figure 3.

Nach der Montage der Kernbleche und des an den Kernblechen angreifenden Bodendeckels des Transformators oder der Vorschaltdrossel, welcher Bodendeckel einen der Wickelköpfe abschliesst, kann über das Formstück eine Endkappe geschoben werden. Diese Endkappe deckt den Wickelkopf der anderen Spule ab. Diese Endkappe kann als einfaches Kunststoffteil ausgestaltet sein, welches z.B. aus der Richtung entsprechende dem Pfeil B von Figur 1 auf das Formstück aufgeschoben wird. Insbesondere bei einem Transformator wird aber bevorzugterweise die Endkappe als Klemmengehäuse ausgeführt, welches die Anschlussklemmen für die Primär- und Sekundärwicklung des Transformators trägt. In Figur 7 ist ein solches Klemmengehäuse im Schnitt gezeigt. Das Klemmengehäuse ist als einstückiges Kunststoffgehäuse 30 ausgeführt, in welchem Ausnehmungen 31 angeordnet sind, in welchen Schraubklemmen angeordnet werden können. Um die Schrauben der Schraubklemmen bedienen zu können, sind entsprechende Ausnehmungen 32 bzw. 33 im Kunststoffgehäuse 30 vorgesehen. Vorzugsweise werden dabei die Ausnehmungen 32 nach der Montage des Transformators mit einem Deckel zugedeckt, da für den Anschluss des Transformators nur noch die über die Ausnehmungen 33 zugänglichen Schrauben betätigt werden müssen. In Figur 7 ist das Formstück gemäss Figur 2 ebenfalls eingezeichnet, woraus ersichtlich ist, wie das Klemmengehäuse auf das Formstück aufgeschoben ist. Dies erfolgt derart, dass die von den Drahthaltemitteln 16, 17, 20, 24 gehaltenen Drahtenden direkt in die Schraubklemmen hineinreichen. Dies ergibt eine besonders einfache Montage des Transformators.After the assembly of the core sheets and the bottom cover of the transformer acting on the core sheets or the series reactor, which bottom cover closes one of the end windings, an end cap can be pushed over the fitting. This end cap covers the winding head of the other coil. This end cap can be designed as a simple plastic part, which is pushed onto the molding, for example from the direction corresponding to the arrow B in FIG. In particular in the case of a transformer, however, the end cap is preferably designed as a terminal housing which holds the connection terminals for the primary and secondary winding of the Transformer. Such a terminal housing is shown in section in FIG. The terminal housing is designed as a one-piece plastic housing 30, in which recesses 31 are arranged, in which screw terminals can be arranged. In order to be able to operate the screws of the screw terminals, corresponding recesses 32 and 33 are provided in the plastic housing 30. The recesses 32 are preferably covered with a cover after the transformer has been installed, since only the screws accessible via the recesses 33 have to be actuated to connect the transformer. In Figure 7, the fitting according to Figure 2 is also shown, from which it can be seen how the terminal housing is pushed onto the fitting. This is done in such a way that the wire ends held by the wire holding means 16, 17, 20, 24 extend directly into the screw terminals. This results in a particularly simple assembly of the transformer.

Figur 8 zeigt eine Ansicht in das Innere des Klemmengehäuses in Richtung auf die Schraubklemmen. Ersichtlich ist dabei eine Kammer 35, welche zur Anordnung eines Thermo-Schalters dient. Vorzugsweise ist zur Halterung eines solchen Thermoschalters ein einstückiges Kunststoffteil 36 vorgesehen, welches in die Kammer 35 einschiebbar ist und welches in Figur 8 angedeutet ist. Der Thermoschalter 37 ist dabei nur als Block eingezeichnet. Der Halter 36 weist ferner einen Abschnitt auf, der die rechte äussere Schraubklemme 41 trägt, welche in diesem Fall als zwei axial voneinander getrennte und elektrisch voneinander isolierte Schraubanschlüsse ausgestaltet ist. Dies, da zunächst eine Leitung von der Eingangsklemme des Transformators zum Thermo-Schalter geführt werden muss und weiter eine Leitung von dem Thermo-Schalter zurück zur zweiten Klemme, an der das entsprechende Drahtende der Spule befestigt wird. Zur Führung der genannten Leitungen weist der Halter 36 entsprechende Drahtführungsmittel 38, 39 auf. Mit diesem einstückigen Halter 36 aus Kunststoff, der mit dem Thermoschalter und den genannten Schraubklemmen fertig vorverdrahtet werden kann, wird die Montage des Transformators weiter vereinfacht. Der fertig verdrahtete Kalter 36 wird dazu in das Klemmengehäuse 30 eingeführt. Danach kann das so vorbereitete Klemmengehäuse 30 auf das Formstück aufgeschoben werden, welches die Drahtenden der Spulen in richtiger Position trägt. Beim Aufschieben des Klemmengehäuses werden somit die Drahtenden in die zugehörigen Schraubklemmen eingeführt. Es müssen nachfolgende nur noch die entsprechenden Schrauben der Schraubklemmen angezogen werden und die Schraubenöffnungen 32 mit dem Deckel zugedeckt werden.FIG. 8 shows a view into the interior of the terminal housing in the direction of the screw terminals. A chamber 35 can be seen, which is used to arrange a thermal switch. A one-piece plastic part 36 is preferably provided for holding such a thermal switch, which can be inserted into the chamber 35 and which is indicated in FIG. 8. The thermal switch 37 is shown only as a block. The holder 36 also has a section which carries the right outer screw terminal 41, which in this case is designed as two screw connections which are axially separated and electrically insulated from one another. This is because a line must first be routed from the input terminal of the transformer to the thermal switch and then a line from the thermal switch back to the second terminal, to which the corresponding wire end of the coil is attached. The holder 36 has corresponding wire guide means 38, 39 for guiding the lines mentioned. With this one piece Holder 36 made of plastic, which can be pre-wired with the thermal switch and the screw terminals mentioned, further simplifies the assembly of the transformer. The fully wired cold 36 is inserted into the terminal housing 30 for this purpose. The clamp housing 30 prepared in this way can then be pushed onto the shaped piece which carries the wire ends of the coils in the correct position. When the terminal housing is pushed on, the wire ends are inserted into the associated screw terminals. Subsequently, only the corresponding screws of the screw terminals have to be tightened and the screw openings 32 covered with the cover.

Claims (21)

  1. Transformer, in particular for low-voltage halogen lamps, or symmetric series reactor for fluorescent lamps, with two superposed coils (2, 3), the coil heads of which protrude from the stack (1) of sheets of the transformer or of the reactor, with shaped insulating pieces arranged on both sides of the stack above the coil heads, characterized in that each shaped insulating piece is monolithic and comprises a partition wall (4) which insulates the two coils (2, 3) from each other in the region of the coil heads, fixing means (6, 7, 9; 5, 8, 10) being provided on both sides of the partition wall for gripping the corresponding coil.
  2. Transformer or series reactor according to claim 1, characterized in that the fixing means pinch the two branches of the coils, which are U-shaped in the region of the coil heads, between them.
  3. Transformer or series reactor according to claim 1 or 2, characterized in that each fixing means comprises several tongues (6, 7, 9; 5, 8, 10) which extend from the partition wall (4) in order to pinch the coils.
  4. Transformer or series reactor according to claim 2 and 3, characterized in that there is provided a stiff central tongue (9, 10) which extends between the branches of the U-shaped coil, and that an outer, elastic tongue (6, 7; 5, 8) is provided on both sides of the branches, which comprises a shoulder at its distal end in order to grip the coil.
  5. Transformer or series reactor according to one of claims 1 to 4, characterized in that a terminal plate (15) extending essentially parallel to the front surface of the stack is provided on the partition wall (4), and that this plate comprises attachment means (16, 17, 20, 24) for the extremities of the coil wires.
  6. Transformer or series reactor according to claim 5, characterized in that the attachment means comprise elastic clips (20, 24) formed in the terminal plate, with a recess for receiving the end of the wire, a slit which extends from the recess and gets wider towards an edge of the terminal plate (15) where it has an open end for introducing the wire into the recess, and with a slit (22, 23) that extends from the recess into the inner part of the plate where it is closed at its end.
  7. Transformer or series reactor according to claim 5 or 6, characterized in that the attachment means comprise wire guides (16, 17) which protrude from the terminal plate.
  8. Transformer or series reactor according to one of claims 1 to 7, characterized in that wire guides (12, 13, 14) are formed on the partition wall (4) in order to determine the paths of the free ends of the coil wire.
  9. Transformer or series reactor according to one of claims 1 to 8, characterized in that a chamber (18) open on one side is formed on the partition wall (4), at least one side wall of the chamber leaning against the coil, this chamber being intended to receive a thermal safety cut-out.
  10. Transformer or series reactor according to claim 4 and 9, characterized in that the chamber (18) forms the stiff central tongue (10).
  11. Transformer or series reactor according to one of claims 1 to 10, characterized by a closing cap which can be pushed over the shaped insulating piece.
  12. Transformer or series reactor according to claim 11, characterized in that the closing cap can be pushed on at right. angle to the axis of the coil.
  13. Transformer or series reactor according to claim 11, characterized in that the closing cap can be pushed on parallel to the axis of the coil.
  14. Transformer or series reactor according to claim 13, characterized in that the closing cap (30) supports a row of terminals with screws, which on the one hand receive the wire ends from the coils, and which on the other hand form the terminals of the transformer or series reactor.
  15. Transformer or series reactor according to claim 5 and 14, characterized in that the attachment means (16, 17, 20, 24) on the terminal plate (15) for the ends of the wires are placed essentially coaxially with corresponding terminals with screws in the closing cap, which are intended for the different ends of the wires, so that when the closing cap is pushed into place, the ends of the wires enter the corresponding terminals with screws.
  16. Transformer or series reactor according to one of claims 14 to 15, characterized in that the screw holes (32) of the terminals which face the coils can be covered with a removable cover of the closing cap.
  17. Transformer or series reactor according to one of claims 13 to 16, characterized in that a chamber (35) for receiving a thermo-switch (37) is provided in the closing cap (30).
  18. Transformer or series reactor according to claim 14 and 17, characterized in that the chamber is placed centrally between two sections of the row of terminals with screws.
  19. Transformer or series reactor according to claim 17 or 18, characterized in that the thermo-switch consists in a bimetal thermoelement with an additional thick film heating resistance.
  20. Transformer or series reactor according to one of claims 17 to 19, characterized in that there is provided a holder (36) made of insulating material for the thermo-switch (37).
  21. Transformer or series reactor according to claim 14 and 20, characterized in that the insulating holder supports a fixing means for the thermo-switch, a connecting wire guide (38, 39) for the wires which connect the thermo-switch, and a two-part terminal with screws (41) comprising two mutually insulated connecting means.
EP93104587A 1992-03-26 1993-03-19 Transformer or inductor with shaped pieces of insulating material at the coil end turns Expired - Lifetime EP0562495B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH959/92 1992-03-26
CH95992 1992-03-26

Publications (3)

Publication Number Publication Date
EP0562495A2 EP0562495A2 (en) 1993-09-29
EP0562495A3 EP0562495A3 (en) 1993-11-03
EP0562495B1 true EP0562495B1 (en) 1995-08-30

Family

ID=4199167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104587A Expired - Lifetime EP0562495B1 (en) 1992-03-26 1993-03-19 Transformer or inductor with shaped pieces of insulating material at the coil end turns

Country Status (4)

Country Link
EP (1) EP0562495B1 (en)
AT (1) ATE127270T1 (en)
DE (1) DE59300515D1 (en)
ES (1) ES2076809T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2304837B1 (en) * 2006-02-16 2009-06-04 Polylux, .Sl. INDUCTANCE AND ITS CORRESPONDING MANUFACTURING PROCEDURE.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309110C2 (en) 1983-03-15 1985-03-21 Schwabe GmbH & Co KG Elektrotechnische Fabrik, 7067 Urbach Choke or transformer, in particular as a ballast for gas discharge lamps

Also Published As

Publication number Publication date
DE59300515D1 (en) 1995-10-05
ATE127270T1 (en) 1995-09-15
EP0562495A2 (en) 1993-09-29
EP0562495A3 (en) 1993-11-03
ES2076809T3 (en) 1995-11-01

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