EP0121903A1 - Transformer - Google Patents

Transformer Download PDF

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Publication number
EP0121903A1
EP0121903A1 EP84103735A EP84103735A EP0121903A1 EP 0121903 A1 EP0121903 A1 EP 0121903A1 EP 84103735 A EP84103735 A EP 84103735A EP 84103735 A EP84103735 A EP 84103735A EP 0121903 A1 EP0121903 A1 EP 0121903A1
Authority
EP
European Patent Office
Prior art keywords
cup
tub
transformer
trough
voltage cable
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.)
Withdrawn
Application number
EP84103735A
Other languages
German (de)
French (fr)
Inventor
Ernst Schmotz
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
Publication of EP0121903A1 publication Critical patent/EP0121903A1/en
Withdrawn legal-status Critical Current

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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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/42—Flyback transformers
    • 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
    • H01F2005/046—Details of formers and pin terminals related to mounting on printed circuits

Definitions

  • the invention relates to a transformer, in particular a high-voltage transformer, with a coil cast into a cup, with coil connecting pins protruding beyond the cup opening, and with a high-voltage connection which is guided through the cup to the outside.
  • the high-voltage connection which is usually carried out by means of an insulated high-voltage cable contacted with the suitable winding ends of the coil, presents considerable difficulties in electrical and structural terms. Due to the high voltages that occur - e.g. if the test voltage is 30 kV - the contact point of the high-voltage cable with the winding ends is either cast into the inside of the transformer or with a pluggable contact, a sufficiently large insulation gap of e.g. 30 mm air gap set.
  • the former case requires the high-voltage cable to pass through the cup in a perfectly sealed manner, which cannot be guaranteed due to the often opposite properties of the insulating material of the high-voltage cable and the casting resin used for sealing.
  • the known high-voltage connections for transformers also cause considerable difficulties in terms of production technology.
  • the up to 30 cm long high-voltage cables with their picture tube plugs attached to them take up a considerable amount of space in the vacuum casting systems intended for the casting of cups and are also difficult to handle.
  • the socket used in the cup bottom only meets the usual requirements if it is ensured that no potting compound, usually casting resin, can reach the contact point of the socket and the socket is nevertheless spray-proof cast into the cup bottom.
  • the present invention has for its object to provide a transformer of the type mentioned, which avoids the disadvantages inherent in the aforementioned, known types of high-voltage connection; i.e. In particular, safe isolation of the high-voltage connection in the transformer area is made possible and, moreover, it can be produced with the least possible effort in terms of production technology.
  • the invention provides for a transformer according to the preamble of the patent claim that an externally open trough is formed on the outside of the cup, that a wire pin is guided through the trough bottom into the inside of the cup and contacted with the coil winding, that that arranged in the inside of the trough The end of the wire pin is contacted with a high-voltage cable, and that the tub is poured out with insulating material, in particular cast resin.
  • the trough is expediently formed on the cup base in one piece, in such a way that the cup and trough bases form a common element and the high-voltage cable led out of the side of the tub.
  • the tub wall can be pulled up in sections and this raised part can be used as a system or stop for the high-voltage cable.
  • This version offers considerable advantages. For example, it is not difficult to guide the wire pin completely tight through the bottom of the cup.
  • the casting of the cup with the coil used can be done without hindrance by the high-voltage cable and thus with the least possible space in the vacuum casting system, since the contacting of the high-voltage cable with the wire pin and the casting of the tub must be carried out in a further operation. For this, i.ü. no vacuum casting machine necessary. It is sufficient e.g. a suitable one, e.g. resin that hardens at room temperature and is injected into the tub using a dispensing gun.
  • the wire pin 7 is guided through the common cup - or trough bottom - into the inside of the trough and there - as with 14 (see FIGS. 2 and 3) - soldered to the stripped end of a high-voltage cable 9.
  • the winding is consequently connected to high voltage via the wire pin 7 and the downstream diodes or resistors.
  • the high-voltage cable 9 is led out laterally via a recess 11 in the wall of the tub 8.
  • the part of the high-voltage cable 9, including the soldering point 14, arranged in the tub 8 is in an insulating compound 10, e.g. cures at room temperature and without a special vacuum casting system, e.g. can only be injected into the tub 8 by means of simple dispensing guns.
  • part 15 of the tub 8 is pulled up and thus forms a contact surface for the high-voltage cable 9, for example by means of a clamp 16 is attached to part 15 of the tub.
  • the high-voltage cable 9 can be led out perpendicular to the cup base and fixed in this position.
  • the embodiment of a transformer shown as an example in the figures enables the step-by-step encapsulation of the cup and the tub, which can be carried out in separate systems, and thus considerably simplifies production.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Insulating Of Coils (AREA)

Abstract

Transformer, especially a high-voltage transformer, having a coil cast in a cup with coil connecting pins projecting above the cup opening and with a tub (8), opening outwards and integrally formed in one piece on the outside of the cup, through the base of which tub (8) a wire pin (7) is fed into the interior of the cup and makes contact with the coil winding (3), the end of the wire pin (7) arranged in the interior of the tub making contact with a high-voltage cable (9) and the remaining hollow space of the tub being filled with a cast dielectric mass (10). <IMAGE>

Description

Die Erfindung betrifft einen Transformator, inbesondere Hochspannungstransformator, mit einer in einen Becher eingegossenen Spule, mit über die Becheröffnung herausragenden Spulenanschlußstiften, und mit einem Hochspannungsanschluß, der durch den Becher nach außen geführt ist.The invention relates to a transformer, in particular a high-voltage transformer, with a coil cast into a cup, with coil connecting pins protruding beyond the cup opening, and with a high-voltage connection which is guided through the cup to the outside.

Der Hochspannungsanschluß, der üblich durch ein mit den geeigneten Wickelenden der Spule kontaktiertes, isoliertes Hochspannungskabel erfolgt, bereitet in elektrischer und konstruktiver Hinsicht erhebliche Schwierigkeiten. Aufgrund der auftretenden hohen Spannungen - z.B. beträgt die Prüfspannung 30 kV - wird die Kontaktstelle des Hochspannungskabels mit den Wickelenden entweder in das Becherinnere des Transformators-mit eingegossen oder es wird bei einer steckbaren Kontaktierung eine ausreichend große Isolierstrecke von z.B. 30 mm Luftabstand festgelegt.The high-voltage connection, which is usually carried out by means of an insulated high-voltage cable contacted with the suitable winding ends of the coil, presents considerable difficulties in electrical and structural terms. Due to the high voltages that occur - e.g. if the test voltage is 30 kV - the contact point of the high-voltage cable with the winding ends is either cast into the inside of the transformer or with a pluggable contact, a sufficiently large insulation gap of e.g. 30 mm air gap set.

Der erstgenannte Fall erfordert eine einwandfrei dichte Durchführung des Hochspannungskabels durch den Becher, die aufgrund der oftmals entgegengesetzten Eigenschaften des Isoliermaterials des Hochspannungskabels und des zur Abdichtung verwendeten Gießharzes nicht gewährleistet ist. Auch fertigungstechnisch bedingen die bekannten Hochspannungsanschiüsse für Transformatoren erhebliche Schwierigkeiten. Die bis zu 30 cm langen Hochspannungskabel mit ihren daran fixierten Bildröhrensteckern nehmen nämlich in den für den Becherverguß vorgesehenen Vakuum-Vergußanlagen erheblichen Raum ein und sind zudem nur umständlich zu handhaben.The former case requires the high-voltage cable to pass through the cup in a perfectly sealed manner, which cannot be guaranteed due to the often opposite properties of the insulating material of the high-voltage cable and the casting resin used for sealing. The known high-voltage connections for transformers also cause considerable difficulties in terms of production technology. The up to 30 cm long high-voltage cables with their picture tube plugs attached to them take up a considerable amount of space in the vacuum casting systems intended for the casting of cups and are also difficult to handle.

Die letztgenannte, steckbare Lösung mit einer z.B. im Becherboden eingesetzten Steckbuchse genügt den üblichen Forderungen nur, wenn gewährleistet ist, daß keine Vergußmasse, üblicherweise also Gießharz an die Kontaktierungsstelle der Steckbuchse gelangen kann und trotzdem die Steckbuchse sprühfest in den Becherboden'eingegossen ist. Zusätzlich sind die bereits erwähnte Isolierstrecke von z.B. 30 mm einzuhalten und in den meisten Fällen eine Zugentlastung für das Hochspannungskabel notwendig.The latter, pluggable solution with e.g. The socket used in the cup bottom only meets the usual requirements if it is ensured that no potting compound, usually casting resin, can reach the contact point of the socket and the socket is nevertheless spray-proof cast into the cup bottom. In addition, the already mentioned insulation section of e.g. 30 mm and in most cases a strain relief for the high-voltage cable is necessary.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Transformator der eingangs genannten Art zu schaffen, der die den vorstehend genannten, bekannten Arten des Hochspannungsanschlusses anhaftenden Nachteile vermeidet; d.h. insbesondere eine sichere Isolierung des Hochspannungsanschlusses im Transformatorbereich ermöglicht und zudem fertigungstechnisch mit geringstmöglichem Aufwand herstellbar ist.The present invention has for its object to provide a transformer of the type mentioned, which avoids the disadvantages inherent in the aforementioned, known types of high-voltage connection; i.e. In particular, safe isolation of the high-voltage connection in the transformer area is made possible and, moreover, it can be produced with the least possible effort in terms of production technology.

Zur Lösung dieser Aufgabe sieht die Erfindung bei einem Transformator gemäß Oberbegriff des Patentanspruchs vor, daß an die Becheraußenseite eine nach außen geöffnete Wanne angeformt ist, daß durch den Wannenboden ein Drahtstift in das Becherinnere geführt und mit der Spulenwicklung kontaktiert ist, daß das im Wanneninneren angeordnete Ende des Drahtstiftes mit einem Hochspannunskabel kontaktiert ist, und daß die Wanne mit Isoliermasse, insbesondere Gießharz ausgegossen ist.To achieve this object, the invention provides for a transformer according to the preamble of the patent claim that an externally open trough is formed on the outside of the cup, that a wire pin is guided through the trough bottom into the inside of the cup and contacted with the coil winding, that that arranged in the inside of the trough The end of the wire pin is contacted with a high-voltage cable, and that the tub is poured out with insulating material, in particular cast resin.

Zweckmäßigerweise ist die Wanne am Becherboden einstückig angeformt, derart, daß Becher- und Wannenboden eine gemeinsames Element bilden und das Hochspannungskabel seitlich aus der Wanne herausgeführt.The trough is expediently formed on the cup base in one piece, in such a way that the cup and trough bases form a common element and the high-voltage cable led out of the side of the tub.

Bei eventuell erwünschter Herausführung des Hochspannungskabels senkrecht zum Wannenboden, kann die Wannenwandung abschnittsweise hochgezogen und dieser hochgezogene Teil als Anlage bzw. Anschlag für das Hochspannungskabel verwendet werden.If the high-voltage cable is possibly led out perpendicular to the tub floor, the tub wall can be pulled up in sections and this raised part can be used as a system or stop for the high-voltage cable.

Diese Ausführung bietet erhebliche Vorteile. Beispielsweise bereitet es-keine Schwierigkeiten den Drahtstift völlig dicht durch den Becherboden zu führen. Der Verguß des Bechers mit der eingesetzten Spule kann ohne Behinderung durch das Hochspannungskabel und damit mit geringstmöglichem Raumaufwand in der Vakuum- Vergußanlage erfolgen, da die Kontaktierung des Hochspannungskabels mit dem Drahtstift und der Verguß der Wanne erst in einem weiteren Arbeitsgang durchgeführt werden muß. Hierzu ist i.ü. keine Vakuum-Vergußanlage nötig. Es genügt z.B. ein geeignetes, z.B. bei Zimmertemperatur aushärtendes Harz, das mittels einer Dosierpistole in die Wanne eingespritzt wird.This version offers considerable advantages. For example, it is not difficult to guide the wire pin completely tight through the bottom of the cup. The casting of the cup with the coil used can be done without hindrance by the high-voltage cable and thus with the least possible space in the vacuum casting system, since the contacting of the high-voltage cable with the wire pin and the casting of the tub must be carried out in a further operation. For this, i.ü. no vacuum casting machine necessary. It is sufficient e.g. a suitable one, e.g. resin that hardens at room temperature and is injected into the tub using a dispensing gun.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen näher erläutert. Es zeigt:

  • Fig. 1 in geschnittener und schematischer Ansicht ein erstes Ausführungsbeispiel eines Transformators nach der Erfindung, wobei die Kontaktierung des Drahtstiftes mit dem Hochspannungskabel weggelassen ist
  • Fig. 2 in teilweise geschnittener Ansicht den Transformator nach Fig. 1 mit kontaktiertem Hochspannungskabel
  • Fig. 3 in der Darstellung nach Fig. 2 ein zweites Ausführungsbeispiel des Gegenstandes nach der Erfindung. Fig. 1 zeigt einen Becher 1, z.B. aus Kunststoff, an dessen Becherboden eine nach außen geöffnete Wanne 8 einstückig angeformt ist. Im Becherinneren ist eine Spule untergebracht, bestehend aus einem in mehrere Kammer unterteilten Spulenkörper 2 mit Wicklungen 3 und Anschlußstiften 4, die mit ihren freien Enden über die Becheröffnung hinausragen. Die Wicklungen 3 und Anschlußstifte 4 sind über ggf. auf Leiterplatten angeordneten, mit 5 bezeichneten Dioden, Widerständen und dergl. mit einem Drahtstift 7 elektrisch kontaktiert. Der verbleibende Hohlraum des Bechers 1 ist mit Gießharz, insbesondere Epoxidharz vergossen.
The invention is explained in more detail below on the basis of exemplary embodiments. It shows:
  • Fig. 1 in a sectional and schematic view of a first embodiment of a transformer according to the invention, wherein the contacting of the wire pin with the high-voltage cable is omitted
  • Fig. 2 in a partially sectioned view of the transformer of FIG. 1 with contacted high voltage cable
  • Fig. 3 in the illustration of Fig. 2 shows a second embodiment of the object according to the invention. Fig. 1 shows a cup 1, for example made of plastic, on the cup base an outwardly open pan 8 is integrally formed. Inside the cup there is a coil, consisting of a coil body 2 with windings 3 and connecting pins 4, which are divided into several chambers and which project with their free ends beyond the cup opening. The windings 3 and connecting pins 4 are electrically contacted with a wire pin 7 by means of diodes, resistors and the like, optionally arranged on printed circuit boards. The remaining cavity of the cup 1 is cast with casting resin, in particular epoxy resin.

Der Drahtstift 7 ist durch den gemeinsamen Becher - bzw. Wannenboden - in das Wanneninnere geführt und dort - wie bei 14 (siehe Fig. 2 und 3) - mit dem abisolierten Ende eines Hochspannungskabels 9 verlötet. Im Betrieb des Transformators liegt folglich die Wicklung über den Drahtstift 7 und die nachgeschalteten Dioden bzw. Widerstände an Hochspannung.The wire pin 7 is guided through the common cup - or trough bottom - into the inside of the trough and there - as with 14 (see FIGS. 2 and 3) - soldered to the stripped end of a high-voltage cable 9. During operation of the transformer, the winding is consequently connected to high voltage via the wire pin 7 and the downstream diodes or resistors.

Im Ausführungsbeispiel nach Fig. 1, 2 ist, wie dies in Fig. 2 dargestellt ist, das Hochspannungskabel 9 über eine Ausnehmung 11 in der Wand der Wanne 8 seitlich herausgeführt. Der in der Wanne 8 angeordnete Teil des Hochspannungskabels 9 samt Lötstelle 14 ist in eine Isoliermasse 10, die z.B. bei Raumtemperatur'aushärtet und ohne spezielle Vakuum-Vergußanlage, z.B. lediglich mittels einfacher Dosierpistolen in die Wanne 8 eingespritzt werden kann, eingebettet.In the exemplary embodiment according to FIGS. 1, 2, as shown in FIG. 2, the high-voltage cable 9 is led out laterally via a recess 11 in the wall of the tub 8. The part of the high-voltage cable 9, including the soldering point 14, arranged in the tub 8 is in an insulating compound 10, e.g. cures at room temperature and without a special vacuum casting system, e.g. can only be injected into the tub 8 by means of simple dispensing guns.

Beim Ausführungsbeispiel nach Fig. 3 ist ein Teil 15 der Wanne 8 hochgezogen und bildet so eine Anlagefläche für das Hochspannungskabel 9, das z.B. mittels einer Schelle 16 am Teil 15 der Wanne befestigt ist. Hierdurch kann das Hochspannungskabel 9 senkrecht zum Becherboden herausgeführt.und in dieser Stellung fixiert werden.In the exemplary embodiment according to FIG. 3, part 15 of the tub 8 is pulled up and thus forms a contact surface for the high-voltage cable 9, for example by means of a clamp 16 is attached to part 15 of the tub. As a result, the high-voltage cable 9 can be led out perpendicular to the cup base and fixed in this position.

Wie bereits erwähnt, ermöglicht die in den Figuren beispielhaft dargestellte Ausführung eines Transformators den schrittweisen, in getrennten Anlagen durchführbaren Verguß des Bechers und der Wanne und vereinfacht somit die Fertigung in erheblichem Maße.As already mentioned, the embodiment of a transformer shown as an example in the figures enables the step-by-step encapsulation of the cup and the tub, which can be carried out in separate systems, and thus considerably simplifies production.

Claims (3)

1. Transformator, insbesondere Hochspannungstransformator, mit einer in einen Becher eingegossenen Spule, mit über die Becheröffnung herausragenden Spulenanschlußstiften, und mit einem Hochspannungsanschluß, der durch den Becher nach außen geführt ist, dadurch gekennzeichnet, daß an die Becheraußenseite eine nach außen geöffnete Wanne (8) angeformt ist, daß durch den Wannenboden ein Drahtstift (7) in das Becherinnere geführt und mit der Spulenwicklung (3) kontaktiert ist, daß das im Wanneninneren angeordnete Ende des Drahtstiftes mit einem Hochspannungskabel (9) kontaktiert ist, und daß die Wanne mit Isoliermasse (10) ausgegossen ist.1. Transformer, in particular high-voltage transformer, with a coil cast into a cup, with coil connecting pins protruding beyond the cup opening, and with a high-voltage connection which is led through the cup to the outside, characterized in that an externally open trough (8 ) is formed that a wire pin (7) is guided through the tub bottom into the inside of the cup and contacted with the coil winding (3), that the end of the wire pin arranged inside the tub is contacted with a high-voltage cable (9), and that the tub with insulating compound (10) is poured out. 2. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß die Wanne (8) am Becherboden einstückig angeformt ist und daß das Hochspannungskabel (9) seitlich aus der Wanne herausgeführt ist.2. Transformer according to claim 1, characterized in that the trough (8) is integrally formed on the cup base and that the high-voltage cable (9) is guided out of the side of the trough. 3. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß das Hochspannungskabel (9) senkrecht zum Wannenboden herausgeführt ist und gegen einen hochgezogenen Teil (15) der Wanne (8) anliegt.3. Transformer according to claim 1, characterized in that the high-voltage cable (9) is led out perpendicular to the trough bottom and bears against a raised part (15) of the trough (8).
EP84103735A 1983-04-11 1984-04-04 Transformer Withdrawn EP0121903A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833312960 DE3312960A1 (en) 1983-04-11 1983-04-11 TRANSFORMER
DE3312960 1983-04-11

Publications (1)

Publication Number Publication Date
EP0121903A1 true EP0121903A1 (en) 1984-10-17

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EP84103735A Withdrawn EP0121903A1 (en) 1983-04-11 1984-04-04 Transformer

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DE (1) DE3312960A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606205A1 (en) * 1986-10-31 1988-05-06 Hitachi Ltd High DC voltage generating device
GB2244607A (en) * 1990-04-28 1991-12-04 Bach & Co Flying lead on switching device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3109268A1 (en) * 1980-03-12 1982-03-18 Sanyo Electric Co., Ltd., Moriguchi, Osaka LINE TRANSFORMER
DE3041254A1 (en) * 1980-11-03 1982-06-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Line transformer for TV receiver - has shielded HV connection as integral part of casing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914600A (en) * 1952-09-05 1959-11-24 Chicago Telephone Of Californi Embedded coil and method of manufacturing
US3236937A (en) * 1963-04-29 1966-02-22 Briggs & Stratton Corp Connector means and receptacle for connecting high tension lead to ignition coil
DE2848832A1 (en) * 1978-11-11 1980-05-22 Denki Onkyo Co Ltd LINE DEFLECTION TRANSFORMER

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3109268A1 (en) * 1980-03-12 1982-03-18 Sanyo Electric Co., Ltd., Moriguchi, Osaka LINE TRANSFORMER
DE3041254A1 (en) * 1980-11-03 1982-06-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Line transformer for TV receiver - has shielded HV connection as integral part of casing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606205A1 (en) * 1986-10-31 1988-05-06 Hitachi Ltd High DC voltage generating device
GB2244607A (en) * 1990-04-28 1991-12-04 Bach & Co Flying lead on switching device
GB2244607B (en) * 1990-04-28 1994-12-21 Bach & Co Switching device,in particular relay

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