EP0473629A1 - Method for producing a coil for transformers, in particular high-voltage transformers. - Google Patents

Method for producing a coil for transformers, in particular high-voltage transformers.

Info

Publication number
EP0473629A1
EP0473629A1 EP90907046A EP90907046A EP0473629A1 EP 0473629 A1 EP0473629 A1 EP 0473629A1 EP 90907046 A EP90907046 A EP 90907046A EP 90907046 A EP90907046 A EP 90907046A EP 0473629 A1 EP0473629 A1 EP 0473629A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
winding
wire
electrically conductive
coil
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
EP90907046A
Other languages
German (de)
French (fr)
Other versions
EP0473629B1 (en
Inventor
Edwin Muz
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.)
Haug GmbH and Co KG
Original Assignee
Haug GmbH and Co 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
Application filed by Haug GmbH and Co KG filed Critical Haug GmbH and Co KG
Publication of EP0473629A1 publication Critical patent/EP0473629A1/en
Application granted granted Critical
Publication of EP0473629B1 publication Critical patent/EP0473629B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H01F27/327—Encapsulating or impregnating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • Coil for transformer in particular high-voltage transformer
  • the invention relates to a coil for a transformer, in particular high-voltage transformer according to the preamble of claim 1 and a method for producing such a coil.
  • Such a coil is known from DE-PS 26 28 524.
  • Coils for high-voltage transformers are often made from very thin wire. It is difficult after the completion of the coil to connect the wire start and the wire end of the winding with a connecting terminal or the like in an electrically conductive manner because the thin wire often breaks off and the coil must subsequently be thrown away as a whole.
  • known coils tend to corona discharge, whereby the coils can be damaged or unusable.
  • the start of the winding is fixed and stabilized by the electrically conductive connection of the start of the winding to the sleeve.
  • the robust sleeve can be easily connected to a terminal or the like. For windings made of thin There is therefore no risk of wire tearing off the beginning of the winding when connected to a connecting terminal or the like. The same applies to the wire end.
  • the electrically conductive covering of the casting compound prevents corona discharges.
  • Figure 1 is a coil for a transformer
  • Figure 2 shows the coil of Fig. 1, embedded in a potting compound.
  • the coil shown in FIG. 1 is intended for a transformer, in particular a high-voltage transformer. It is wound from relatively thin wire, which for example has a diameter of approximately 0.5 mm.
  • the wire is enamel insulated and provided with a thermoplastic sheath, so that the sheaths of adjacent turns can be "baked" together with heat in a manner known per se in order to give the winding as a whole more internal strength.
  • the coil 1 comprises an inner winding body in the form of a circular cylindrical sleeve 2 with an axially extending, continuous slot 3.
  • the sleeve 2 consists of non-magnetic metal, preferably made of copper, silver or an alloy of these metals.
  • the slot 3 prevents eddy currents from occurring in the finished coil.
  • the winding body 2 can be pushed onto the core part of a transformer in a known manner.
  • a projection 4 protrudes in one piece from an edge of the sleeve 2.
  • a wire winding 5 is arranged, with a winding start 6 and a winding end 7.
  • the winding start 6 is electrically conductively connected to the metallic sleeve 7, for example by soldering, before the start of the winding. This connection process can easily be carried out so that the winding start 6 does not break off. If the start of the winding breaks off, the connection process can easily be repeated. As shown, the sleeve 2 projects over the wire winding 5 on both sides at its edge regions.
  • the sleeve 2 provided with the wire winding 5 is then inserted in a known manner into a cubic or guaderiform casting mold and cast with a casting compound 8, for example an epoxy or polyurethane resin.
  • a casting compound 8 for example an epoxy or polyurethane resin.
  • At least one of the sleeve edges for example the upper one Sleeve edge 9 also protrude slightly beyond the body of the casting compound 8.
  • the exposed or protruding edge of the sleeve 2 ensures good dissipation of the heat generated during operation of the coil.
  • the wire end 7 is connected to a connecting terminal, for example a socket 11, which is anchored in the desired position on the casting mold.
  • a connecting terminal for example a socket 11
  • the bushing 11 is firmly connected to this body (cf. FIG. 2).
  • a further connecting terminal can be attached in a known manner to the projection 4 of the sleeve 2, which protrudes above the sealing compound 8, without damaging the wire beginning 6.
  • a lead wire can also be soldered directly to the projection 4.
  • the outside of the body formed by the potting compound 8 can be provided with an electrically conductive covering 12, for example made of metal or of electrically conductive plastic.
  • an electrically conductive covering 12 for example made of metal or of electrically conductive plastic.
  • the sheath 12 is connected to the sleeve 2 in an electrically conductive manner, which is done in a simple manner in that the sheath 12 is connected directly to the coil 2. as shown in Figure 2 is brought into contact.
  • a thin wire with a bakeable thermoplastic sheathing is used to produce the wire winding 5 on the sleeve 2.
  • the thickness of the wire can be between 0.1 and 0.01 mm.
  • the winding body formed by the slotted sleeve 2 is fastened in a manner known per se to a rotatingly driven winding tool.
  • the beginning of the winding 6 is connected to the sleeve 2 in an electrically conductive manner, for example by soldering, and the winding tool is then set in rotation so that the wire winding is formed on the sleeve 2 by appropriate guiding of the incoming wire.
  • the wire winding 5 is formed under the action of heat, so that the individual wire windings bake together in a known manner and result in a stable unit.
  • the sleeve 2 provided with the wire winding 5 is embedded in the casting compound 8 in the manner described.

Abstract

Une bobine destinée à un transformateur, notamment un transformateur haute tension, comprend un corps d'enroulement sur lequel est disposé un enroulement de fil qui de son côté présente un début et une fin d'enroulement. Le corps d'enroulement a la forme d'un manchon fendu axialement de bout en bout en métal non magnétique. Le début d'enroulement est relié de manière électroconductrice avec le manchon.A coil intended for a transformer, in particular a high-voltage transformer, comprises a winding body on which is disposed a winding of wire which in turn has a start and an end of winding. The winding body has the shape of a sleeve axially split end to end from non-magnetic metal. The start of the winding is electrically connected with the sleeve.

Description

Spule für Transformator, insbesondere Hochspannungstransformator Coil for transformer, in particular high-voltage transformer
Die Erfindung betrifft eine Spule für einen Transformator, insbesondere Hochspannungstransformator nach dem Oberbegriff des Patentanspruchs 1 sowie ein Verfahren zum Herstellen einer solchen Spule.The invention relates to a coil for a transformer, in particular high-voltage transformer according to the preamble of claim 1 and a method for producing such a coil.
Eine derartige Spule ist aus der DE-PS 26 28 524 bekannt. Spulen für Hochspannungstransformatoren werden häufig aus sehr dünnem Draht hergestellt. Dabei ist es schwierig, nach Fertigstellung der Spule den Drahtanfang und das Drahtende der Wicklung mit einer Anschlußklemme oder dergleichen elek¬ trisch leitend zu verbinden, weil dabei der dünne Draht häufig abreißt und die Spule anschließend als Ganzes wegge¬ worfen werden muß. Außerdem neigen bekannte Spulen zu Korona¬ entladungen, wodurch die Spulen beschädigt oder unbrauchbar werden können.Such a coil is known from DE-PS 26 28 524. Coils for high-voltage transformers are often made from very thin wire. It is difficult after the completion of the coil to connect the wire start and the wire end of the winding with a connecting terminal or the like in an electrically conductive manner because the thin wire often breaks off and the coil must subsequently be thrown away as a whole. In addition, known coils tend to corona discharge, whereby the coils can be damaged or unusable.
Es ist Aufgabe der Erfindung, eine gattungsgemäße Spule so zu verbessern, daß der Anfang und das Ende der DrahtäufWicklung einfach und sicher mit einer Klemme oder dergleichen verbun¬ den werden und Koronaentladungen vermindert werden können.It is an object of the invention to improve a generic coil in such a way that the start and end of the wire winding are simply and securely connected to a clamp or the like and corona discharges can be reduced.
Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 bzw. 3 gelöst.The object is achieved by the characterizing features of claims 1 and 3, respectively.
Durch die elektrisch leitende Verbindung des Wicklungsanfangs mit der Hülse ist der Wicklungsanfang fixiert und stabili¬ siert. Die robuste Hülse kann leicht mit einer Anschlußklemme oder dergleichen verbunden werden. Bei Wicklungen aus dünnem Draht besteht daher keine Gefahr, daß der Anfang der Wicklung beim Verbinden mit einer Anschlußklemme oder dergleichen ab¬ reißt. Entsprechendes gilt für das Drahtende. Die elektrisch leitende Umhüllung der Vergußmasse verhindert Koronaent¬ ladungen.The start of the winding is fixed and stabilized by the electrically conductive connection of the start of the winding to the sleeve. The robust sleeve can be easily connected to a terminal or the like. For windings made of thin There is therefore no risk of wire tearing off the beginning of the winding when connected to a connecting terminal or the like. The same applies to the wire end. The electrically conductive covering of the casting compound prevents corona discharges.
Die nachstehende Beschreibung einer bevorzugten Ausführungs¬ form der Erfindung dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:The following description of a preferred embodiment of the invention serves in conjunction with the accompanying drawing for further explanation. Show it:
Figur 1 eine Spule für einen Transformator undFigure 1 is a coil for a transformer and
Figur 2 die Spule aus Fig. 1, eingebettet in eine Vergußmasse.Figure 2 shows the coil of Fig. 1, embedded in a potting compound.
Die in Figur 1 dargestellte Spule ist für einen Transforma¬ tor, insbesondere Hochspannungstransformator bestimmt. Sie ist aus verhältnismäßig dünnem Draht gewickelt, der bei¬ spielsweise einen Durchmesser von etwa 0,5 mm hat. Der Draht ist lackisoliert und mit einem thermoplastischen Mantel ver¬ sehen, so daß die Mäntel benachbarter Windungen unter Anwen¬ dung von Wärme in an sich bekannter Weise miteinander "ver¬ backen" werden können, um der Wicklung als Ganzes mehr innere Festigkeit zu verleihen.The coil shown in FIG. 1 is intended for a transformer, in particular a high-voltage transformer. It is wound from relatively thin wire, which for example has a diameter of approximately 0.5 mm. The wire is enamel insulated and provided with a thermoplastic sheath, so that the sheaths of adjacent turns can be "baked" together with heat in a manner known per se in order to give the winding as a whole more internal strength.
Wie dargestellt, umfaßt die Spule 1 einen inneren Wickel¬ körper in Gestalt einer kreiszylindrischen Hülse 2 mit einem axial verlaufenden, durchgehenden Schlitz 3. Die Hülse 2 besteht aus nichtmagnetischem Metall, vorzugsweise aus Kupfer, Silber oder aus einer Legierung dieser Metalle. Der Schlitz 3 verhindert in der fertigen Spule das Auf¬ treten von Wirbelströmen. Der Wickelkörper 2 kann nach Fertigstellung der Spule in bekannter Weise auf den Kern¬ teil eines Transformators aufgeschoben werden. Von einem Rand der Hülse 2 steht einstückig ein Vorsprung 4 ab.As shown, the coil 1 comprises an inner winding body in the form of a circular cylindrical sleeve 2 with an axially extending, continuous slot 3. The sleeve 2 consists of non-magnetic metal, preferably made of copper, silver or an alloy of these metals. The slot 3 prevents eddy currents from occurring in the finished coil. After completion of the coil, the winding body 2 can be pushed onto the core part of a transformer in a known manner. A projection 4 protrudes in one piece from an edge of the sleeve 2.
Auf dem.von der Hülse 2 gebildeten Wickelkörper ist eine Drahtwicklung 5 angeordnet, mit einem Wicklungsanfang 6 und einem Wicklungsende 7. Der Wicklungsanfang 6 wird vor Beginn der Wicklung elektrisch leitend mit der metallischen Hülse 7, beispielsweise durch Lötung verbunden. Dieser Ver¬ bindungsvorgang kann leicht so ausgeführt werden, daß dabei der Wicklungsanfang 6 nicht abbricht. Sollte der Wicklungs¬ anfang abbrechen, kann der Verbindungsvorgang leicht wieder¬ holt werden. Wie dargestellt, steht die Hülse 2 an ihren Randbereichen beidseits über die Drahtwicklung 5 vor.On the winding body formed by the sleeve 2, a wire winding 5 is arranged, with a winding start 6 and a winding end 7. The winding start 6 is electrically conductively connected to the metallic sleeve 7, for example by soldering, before the start of the winding. This connection process can easily be carried out so that the winding start 6 does not break off. If the start of the winding breaks off, the connection process can easily be repeated. As shown, the sleeve 2 projects over the wire winding 5 on both sides at its edge regions.
Die mit der Drahtwicklung 5 versehene Hülse 2 wird anschlies- send in bekannter Weise in eine kubische oder guaderförmige Gießform eingesetzt und mit einer Vergußmasse 8, eispiels¬ weise einem Epoxyd- oder Polyurethanharz umgössen. Beim Ein¬ setzen der Spule 1 in die (nicht dargestellte) Gießform ruht die Hülse 2 mit ihrem unteren Rand auf dem Boden der Form auf und hält damit die Drahtwicklung 5 im Abstand vom Boden, so daß die eingegossene Vergußmassedie Drahtwicklung 5 auch an deren unterer Stirnseite umschließt und die Wicklung 5 schließlich in der aus Figur 2 ersichtlichen Weise ringsum in die Vergußmasse 8 eingebettet ist. Bei der fertig in die Vergußmasse 8 eingebetteten Spule 1 liegen die oberen und unteren Ränder der Hülse 2 frei zutage. Gegebenenfalls kann wenigstens einer der Hülsenränder, beispielsweise der obere Hülsenrand 9 auch geringfügig über den Körper der Vergu߬ masse 8 vorstehen. Der freiliegende oder vorstehende Rand der Hülse 2 sorgt für eine gute Ableitung der sich im Be¬ trieb der Spule entwickelnden Wärme.The sleeve 2 provided with the wire winding 5 is then inserted in a known manner into a cubic or guaderiform casting mold and cast with a casting compound 8, for example an epoxy or polyurethane resin. When the coil 1 is inserted into the casting mold (not shown), the lower edge of the sleeve 2 rests on the bottom of the mold and thus holds the wire winding 5 at a distance from the floor, so that the cast casting compound 5 also coats the wire winding 5 on its lower one Encloses the end face and the winding 5 is finally embedded in the potting compound 8 in the manner shown in Figure 2. When the coil 1 is completely embedded in the potting compound 8, the upper and lower edges of the sleeve 2 are exposed. If necessary, at least one of the sleeve edges, for example the upper one Sleeve edge 9 also protrude slightly beyond the body of the casting compound 8. The exposed or protruding edge of the sleeve 2 ensures good dissipation of the heat generated during operation of the coil.
Vor dem Eingießen der Vergußmasse in die Gießform wird das Drahtende 7 mit einer Anschlußklemme, beispielsweise einer Buchse 11 verbunden, die in der gewünschten Stellung an der Gießform verankert wird. Nach Herausnahme des von der Ver¬ gußmasse 8 gebildeten Körpers aus der Gießform ist die Buchse 11 fest mit diesem Körper verbunden (vgl. Figur 2) .Before the casting compound is poured into the casting mold, the wire end 7 is connected to a connecting terminal, for example a socket 11, which is anchored in the desired position on the casting mold. After the body formed by the casting compound 8 has been removed from the casting mold, the bushing 11 is firmly connected to this body (cf. FIG. 2).
An den nach oben über die Vergußmasse 8 hinausreichenden Vorsprung 4 der Hülse 2 kann in bekannter Weise eine wei¬ tere Anschlußklemme angebracht werden, ohne dabei den Drahtanfang 6 zu beschädigen. Mit dem Vorsprung 4 kann auch ein Anschlußdraht unmittelbar verlötet werden.A further connecting terminal can be attached in a known manner to the projection 4 of the sleeve 2, which protrudes above the sealing compound 8, without damaging the wire beginning 6. A lead wire can also be soldered directly to the projection 4.
Wie aus Figur 2 ersichtlich, kann die Aussenseite des von der Vergußmasse 8 gebildeten Körpers mit einer elektrisch¬ leitenden Umhüllung 12 versehen werden, beispielsweise aus Metall oder aus elektrisch leitendem Kunststoff. Zur Ver¬ meidung von Koronaentladungen, wie sie bei Hochspan ungs- transformatoren auftreten können, ist die Umhüllung 12 elektrisch leitend mit der Hülse 2 verbunden, was in ein¬ facher Weise dadurch geschieht, daß die Umhüllung 12 un¬ mittelbar mit der Spule 2, wie aus Figur 2 ersichtlich, in Kontakt gebracht wird. Wie bereits ausgeführt, verwendet man zur Herstellung der Drahtwicklung 5 auf der Hülse 2 einen dünnen Draht mit einer verbackbaren thermoplastischen Ummantelung. Die Dicke des Drahtes kann zwischen 0,1 und 0,01 mm liegen. Bei der Her¬ stellung der Drahtwicklung befestigt man den von der ge¬ schlitzten Hülse 2 gebildeten Wickelkörper in an sich be¬ kannter Weise auf einem drehend angetriebenen Wickelwerk¬ zeug. Man verbindet den Wicklungsanfang 6, beispielsweise durch Löten, mit der Hülse 2 elektrisch leitend und ver¬ setzt hierauf das Wickelwerkzeug in Rotation, so daß sich die Drahtwicklung durch entsprechende Führung des zulaufenden Drahtes auf der Hülse 2 ausbildet. Die Ausbildung der Draht¬ wicklung 5 erfolgt unter Wärmeeinwirkung, so daß die ein¬ zelnen Drahtwindungen in bekannter Weise miteinander ver¬ backen und eine stabile Einheit ergeben. Schließlich wird die mit der Drahtwicklung 5 versehene Hülse 2 in der be¬ schriebenen Weise in die Vergußmasse 8 eingebettet. As can be seen from FIG. 2, the outside of the body formed by the potting compound 8 can be provided with an electrically conductive covering 12, for example made of metal or of electrically conductive plastic. In order to avoid corona discharges, as can occur in high-voltage transformers, the sheath 12 is connected to the sleeve 2 in an electrically conductive manner, which is done in a simple manner in that the sheath 12 is connected directly to the coil 2. as shown in Figure 2 is brought into contact. As already stated, a thin wire with a bakeable thermoplastic sheathing is used to produce the wire winding 5 on the sleeve 2. The thickness of the wire can be between 0.1 and 0.01 mm. In the manufacture of the wire winding, the winding body formed by the slotted sleeve 2 is fastened in a manner known per se to a rotatingly driven winding tool. The beginning of the winding 6 is connected to the sleeve 2 in an electrically conductive manner, for example by soldering, and the winding tool is then set in rotation so that the wire winding is formed on the sleeve 2 by appropriate guiding of the incoming wire. The wire winding 5 is formed under the action of heat, so that the individual wire windings bake together in a known manner and result in a stable unit. Finally, the sleeve 2 provided with the wire winding 5 is embedded in the casting compound 8 in the manner described.

Claims

- 6 -- 6 -
P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
Spule für Transformator, insbesondere Hochspannungstrans- formator mit einer axial durchgehend geschlitzten Hülse aus nicht magnetischem Metall und mit einer unmittelbar darauf angeordneten Drahtwicklung mit einem Wicklungsan¬ fang und einem Wicklungsende, wobei die Hülse beidseits über die Drahtwicklung vorsteht und der Wicklungsanfang mit der Hülse elektrisch leitend verbunden ist, d a d u r c h g e k e n n z e i c h n e t , daß Hülse (2) und Drahtwicklung (5) außen so mit einer elektrisch isolierenden Vergußmasse (8) umgössen sind, daß die oberen und unteren Ränder der Hülse (2) frei zutage liegen, und daß der von der Vergußmasse (8) gebildete Kör¬ per fest mit einer an das Wicklungsende (7) angeschlosse¬ nen Anschlußklemme (Buchse 11) verbunden und außen mit einer elektrisch leitenden Umhüllung (12) versehen ist, die ihrerseits elektrisch leitend an die Hülse (2) ange¬ schlossen ist.Coil for transformer, in particular high-voltage transformer with an axially continuously slotted sleeve made of non-magnetic metal and with a wire winding arranged directly thereon with a winding start and a winding end, the sleeve projecting over the wire winding on both sides and the winding start with the sleeve being electrically conductive is connected, characterized in that the sleeve (2) and the wire winding (5) are cast around the outside with an electrically insulating potting compound (8) in such a way that the upper and lower edges of the sleeve (2) are exposed, and that the potting compound ( 8) is firmly connected to a terminal (socket 11) connected to the winding end (7) and is provided on the outside with an electrically conductive sheath (12) which in turn is connected to the sleeve (2) in an electrically conductive manner is.
Spule nach Anspruch 1, dadurch gekennzeichnet, daß die Hülse (2) an ihrem einen Rand einen nach oben über die Vergußmasse (8) hinausreichenden Vorsprung (4) zur Anbrin¬ gung einer Anschlußklemme oder zum Anlöten eines Anschlu߬ drahtes aufweist. Verfahren zum Herstellen einer Spule nach Anpspruch 1 oder 2 unter Verwendung eines Drahtes mit einer verbackbaren thermoplastischen Ummantelung, wobei die Wicklung auf der Hülse angeordnet und der Wicklungsanfang mit der Hülse elektrisch leitend verbunden wird, dadurch gekennzeichnet, daß man die Hülse auf einem drehend angetriebenen Wickel- Werkzeug befestigt, die Drahtwicklung unter Verbackung ih¬ rer einzelnen Windungen auf der rotierenden Hülse so aus¬ bildet, daß die geschlitzte Hülse mit ihren Stirnseiten beidseits axial über die im wesentlichen zylindrische Drahtwicklung vorsteht, daß man die mit der Drahtwicklung versehene Hülse mit ihrer einen Stirnseite auf den Boden einer Gießform aufsetzt, daß man die Vergußmasse in die Gießform einbringt und daß man die Außenseite der Vergu߬ masse mit einer elektrisch leitenden Umhüllung versieht und diese Umhüllung mit der Hülse elektrisch leitend verbindet. Coil according to claim 1, characterized in that the sleeve (2) has at its one edge a projection (4) which extends upwards beyond the casting compound (8) for attaching a connecting terminal or for soldering a connecting wire. A method for producing a coil according to claim 1 or 2 using a wire with a bakeable thermoplastic sheath, the winding being arranged on the sleeve and the start of the winding being connected to the sleeve in an electrically conductive manner, characterized in that the sleeve is placed on a rotatingly driven winding - Tool attached, the wire winding forms baking their individual windings on the rotating sleeve so that the slotted sleeve protrudes axially on both sides with its end faces beyond the essentially cylindrical wire winding, so that the sleeve provided with the wire winding is pressed with one The end face is placed on the bottom of a casting mold, that the casting compound is introduced into the casting mold and that the outside of the casting compound is provided with an electrically conductive covering and this covering is connected in an electrically conductive manner to the sleeve.
EP90907046A 1989-05-26 1990-05-18 Method for producing a coil for transformers, in particular high-voltage transformers Expired - Lifetime EP0473629B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917212 1989-05-26
DE3917212A DE3917212A1 (en) 1989-05-26 1989-05-26 COIL FOR TRANSFORMER, ESPECIALLY HIGH VOLTAGE TRANSFORMER

Publications (2)

Publication Number Publication Date
EP0473629A1 true EP0473629A1 (en) 1992-03-11
EP0473629B1 EP0473629B1 (en) 1993-08-04

Family

ID=6381475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907046A Expired - Lifetime EP0473629B1 (en) 1989-05-26 1990-05-18 Method for producing a coil for transformers, in particular high-voltage transformers

Country Status (4)

Country Link
US (1) US5302931A (en)
EP (1) EP0473629B1 (en)
DE (1) DE3917212A1 (en)
WO (1) WO1990014673A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018528A1 (en) * 1992-03-05 1993-09-16 Siemens Aktiengesellschaft Coil for high-voltage transformer
MY120386A (en) * 1999-07-28 2005-10-31 Samsung Electronics Co Ltd High voltage transformer for microware oven and method of manufacturing therefor.
JP4410198B2 (en) * 2006-02-07 2010-02-03 三菱電機株式会社 Ignition device for internal combustion engine

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DE490834C (en) * 1929-02-03 1930-02-14 Koch & Sterzel Akt Ges High-voltage transformer with a high-voltage winding applied to a carrier made of insulating material that surrounds the low-voltage winding
GB692464A (en) * 1950-08-25 1953-06-03 Siemens Ag Improvements in or relating to electrical apparatus
US2775742A (en) * 1952-03-06 1956-12-25 Etc Inc Electromagnet coil assembly
DE1488373A1 (en) * 1964-09-19 1969-04-03 Siemens Ag Method for casting windings for transformers
DE2161823A1 (en) * 1971-12-13 1972-07-06 Matsushita Electric Ind Co Ltd Coil arrangement for a transformer
US3947795A (en) * 1974-08-12 1976-03-30 Emerson Electric Co. Transformer winding means and methods
DE2628524C2 (en) * 1976-06-24 1982-06-09 Siemens AG, 1000 Berlin und 8000 München High-voltage winding from several sub-coils for voltage converters,
DE3100419C2 (en) * 1981-01-09 1986-07-17 ANT Nachrichtentechnik GmbH, 7150 Backnang High power density transformer
JPS5812917U (en) * 1981-07-17 1983-01-27 株式会社タムラ製作所 Insulating paper for transformers

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Title
See references of WO9014673A1 *

Also Published As

Publication number Publication date
DE3917212A1 (en) 1990-11-29
WO1990014673A1 (en) 1990-11-29
EP0473629B1 (en) 1993-08-04
DE3917212C2 (en) 1991-07-04
US5302931A (en) 1994-04-12

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