EP0075796A1 - Transformer with windings embedded in cast resin - Google Patents

Transformer with windings embedded in cast resin Download PDF

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Publication number
EP0075796A1
EP0075796A1 EP82108563A EP82108563A EP0075796A1 EP 0075796 A1 EP0075796 A1 EP 0075796A1 EP 82108563 A EP82108563 A EP 82108563A EP 82108563 A EP82108563 A EP 82108563A EP 0075796 A1 EP0075796 A1 EP 0075796A1
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EP
European Patent Office
Prior art keywords
channels
winding
transformer according
cooling channels
insulating gas
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EP82108563A
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German (de)
French (fr)
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EP0075796B1 (en
Inventor
Richard Dr. Pfeiffer
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Transformatoren Union AG
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Transformatoren Union AG
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Priority to AT82108563T priority Critical patent/ATE17172T1/en
Publication of EP0075796A1 publication Critical patent/EP0075796A1/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
    • H01F27/33—Arrangements for noise damping
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/20—Cooling by special gases or non-ambient air
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases

Definitions

  • the invention relates to transformers with an iron core and with high-voltage and low-voltage windings completely embedded in casting resin and with cooling channels arranged in the casting resin that holds and insulates the casting resin.
  • electrically conductive water serves as the coolant.
  • This electrically conductive water advantageously serves at the same time as electrical shielding, but limits the use of the known arrangement to transformers with relatively low nominal voltages, because the use in transformers for higher nominal voltages requires uneconomically large wall thicknesses for the cast resin bodies. Due to the large wall thicknesses, the cast resin bodies are also relatively susceptible to cracking and also act undesirably as thermal insulators.
  • a cast resin transformer in which all windings of a three-phase system are enclosed in a cast resin block, which on the one hand has openings for receiving the core legs of an iron core and, in addition, a recess for receiving one in front of the end faces of the windings has lower and upper yokes.
  • the troughs receiving the yokes are sealed off from the outside by caps.
  • the invention is based on the object of providing an arrangement for cast-resin-insulated transformers which, on the one hand, enables effective construction to provide a compact structure for larger power ratings and, moreover, also allows use at higher characteristic voltages.
  • this object is achieved for a transformer of the type mentioned at the outset in that, in addition to and separately from the cooling ducts, at least in the main scattering duct, further ducts enclosed by the casting resin are provided, and in that these additional ducts are filled with an insulating gas.
  • An advantageous embodiment of the invention is that the high-voltage winding penetrated inside the cooling channels is surrounded on all sides by channels filled with insulating gas, and that the undervoltage winding lying radially between the high-voltage winding and the iron core is only on its outer jacket and its end faces by channels filled with insulating gas is included and that only cooling channels are provided within a cast resin body common to the undervoltage winding and each iron core, and in addition that the connecting conductors of the high-voltage winding are essentially insulated by insulating gas.
  • the high-voltage winding expediently consists of coils spatially arranged axially one above the other, electrically connected in series and wound from coil-wide sheet metal strip, and the undervoltage winding is represented by a spirally wound sheet-metal strip, the width of which is equal to the axial coil length.
  • a coolant flowing through the cooling channels is electrically insulating and versa in the cooling channels and that SF 6, which is under pressure, serves as insulating gas in the additional channels.
  • the cooling channels and the additional channels are each connected to an independent channel system, the internal pressure of which can be set on a heat exchanger and / or reserve tank assigned to the respective channel system, the internal pressure in the cooling channels always being independent of the operating state between the ambient pressure of the transformer and the pressure lies in the additional channels.
  • the surrounding walls are reinforced with glass fibers.
  • the cast resin bodies containing the high-voltage and low-voltage windings are resiliently clamped in relation to the iron core and thereby serve as insulation walls for noise emitted by the iron core.
  • transformers according to the invention is very advantageous because, by reducing the amount of cast resin required and the absolute winding dimensions, it extends the field of application of cast-resin-insulated transformers in the direction of larger rated powers and also enables them to be used at higher than previously controllable rated voltages.
  • the actual undervoltage winding 2 consists of sheet metal strip, the width of which is equal to the winding length and, after winding, is cast into a body 4 made of casting resin. 2 cooling channels 5 are provided in and around the undervoltage winding.
  • a high-voltage winding which in turn comprises undervoltage winding 2, is constructed from a large number of coils 6 arranged axially one above the other.
  • the individual coils 6 are wound from coil-wide sheet metal strip and electrically connected in series.
  • the coils 6 are mechanically connected to one another by a body 7 made of cast resin.
  • the body 7 and the coils 6 together form a grid of radial cooling channels 8 and axial cooling channels 9.
  • the annular end faces of the body 7 comprising the coils 6 are gas-tightly covered by locking rings 10, 10 sealing rings 12 being clamped between the body 7 and the locking rings.
  • the cavity of the locking rings 10 is connected via channels 11 to the grid from the cooling channels 8 and 9 and at the same time serves as a collecting chamber for the supply and discharge of the coolant into the high-voltage winding.
  • the iron core from the core legs 1 and the yokes 3 as well as the undervoltage winding 2 in the body 4 and the upper voltage winding in the body 7 constructed from the coils 6 are encapsulated to the outside by a jacket 14 and a cover 13.
  • the jacket 14 forms with the outer jacket of the body 7 and the cover 13 with the locking rings 10 channels 15 through which, not shown, preferably to the existing casting resin body-shaped, spacers are kept open.
  • support walls 17 are provided for clamping the undervoltage winding 2.
  • channel extensions 16 are located between them and the outer wall of the associated cover, which are directly connected to the channels 15.
  • the support walls 17 form chambers 18 in front of the end faces of the undervoltage winding 2.
  • the chambers 18 are connected to the cooling channels 5 in the undervoltage winding 2 and open in the direction of the core legs 1 and the yokes 3 and serve as coolant collecting containers for the discharge and supply p coolant to Unters annungswicklung 2 and the iron core.
  • the iron core from the core legs 1 and the yokes 3 is resiliently clamped between the covers 13 and is thus decoupled from the windings in terms of vibration technology.
  • the chambers in the closure rings 10 and the chambers 18 are connected in a manner not shown with a compensating vessel and with a recooling device for the coolant flowing through the cooling channels 5, 8 and 9.
  • a non-flammable liquid is expediently used as the coolant, the boiling temperature of which, at the operating pressure provided in the channels, is close to the operating temperature of the undervoltage winding 2 and the high-voltage winding.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)

Abstract

Transformer, including an iron core, high voltage and low voltage windings, at least one cast resin body completely embedding, holding and insulating the windings, the cast resin body having cooling channels formed therein and having additional channels formed therein being separated from the cooling channels, and insulating gas filling the additional channels.

Description

Die Erfindung betrifft Transformatoren mit Eisenkern und mit vollständig in Gießharz eingebetteten Oberspannungs-und Unterspannungswicklungen und mit in dem die Wicklungen haltenden und isolierenden Gießharz angeordneten Kühlkanälen.The invention relates to transformers with an iron core and with high-voltage and low-voltage windings completely embedded in casting resin and with cooling channels arranged in the casting resin that holds and insulates the casting resin.

In einer derartigen durch die DE-PS 20 32 507 bekannten Anordnung dient als Kühlmittel elektrisch leitfähiges Wasser. Dies elektrisch leitfähige Wasser dient zwar vorteilhafterweise gleichzeitig als elektrische Abschirmung, beschränkt jedoch die Anwendung-der bekannten Anordnung auf Transformatoren mit verhältnismäßig niedrigen Nennspannungen, denn der Einsatz in Transformatoren für höhere Nennspannung erfordert unwirtschaftlich große Wanddicken für die Gießharzkörper. Durch große Wanddicken werden darüber hinaus die Gießharzkörper verhältnismäßig rißanfällig und wirken darüber hinaus in unerwünschter Weise als thermische Isolatoren.In such an arrangement known from DE-PS 20 32 507, electrically conductive water serves as the coolant. This electrically conductive water advantageously serves at the same time as electrical shielding, but limits the use of the known arrangement to transformers with relatively low nominal voltages, because the use in transformers for higher nominal voltages requires uneconomically large wall thicknesses for the cast resin bodies. Due to the large wall thicknesses, the cast resin bodies are also relatively susceptible to cracking and also act undesirably as thermal insulators.

Durch die DE-OS 28 26 299 ist ein Gießharztransformator bekannt, bei dem alle Wicklungen eines Drehstromsystems in einen Gießharzblock eingeschlossen sind, der einerseit: Durchbrüche zur Aufnahme der Kernschenkel eines Eisenkernsaufweist und darüber hinaus vor den Stirnseiten der Wicklungen je eine.Mulde zur Aufnahme eines unteren und oberen Joches hat. Die die Joche aufnehmenden Mulden sind bei dieser Anordnung durch Kappen wasserdicht nach außen hin abgeschlossen. In Folge der fehlenden Kühlung innerhalb der Wicklungen und des Kernes ist der Einsatz derartig gestalteter Transformatoren auf verhältnismäßig kleine Nennleistungen bschränkt.From DE-OS 28 26 299 a cast resin transformer is known, in which all windings of a three-phase system are enclosed in a cast resin block, which on the one hand has openings for receiving the core legs of an iron core and, in addition, a recess for receiving one in front of the end faces of the windings has lower and upper yokes. In this arrangement, the troughs receiving the yokes are sealed off from the outside by caps. As a result of the lack of cooling within the windings and the core, the use of transformers designed in this way is restricted to relatively low nominal powers.

Der Erfindung liegt nun die Aufgabe zugrunde, für gießharzisolierte Transformatoren eine Anordnung zu schaffen, die einerseits durch Einsatz einer wirksamen Kühlung einen kompakten Aufbau auch für größere Ivennleistungen und darüber hinaus auch den Einsatz bei höheren Kennspannungen ermöglicht.The invention is based on the object of providing an arrangement for cast-resin-insulated transformers which, on the one hand, enables effective construction to provide a compact structure for larger power ratings and, moreover, also allows use at higher characteristic voltages.

Erfindungsgemäß wird diese Aufgabe für einen Transformator der eingangs genannten Art dadurch gelöst, daß zusätzlich und getrennt von den Kühlkanälen mindestens im Hauptstreukanal weitere vom Gießharz umschlossene-Kanäle vorgesehen sind und daß diese zusätzlichen Kanäle mit einem Isoliergas gefüllt sind.According to the invention, this object is achieved for a transformer of the type mentioned at the outset in that, in addition to and separately from the cooling ducts, at least in the main scattering duct, further ducts enclosed by the casting resin are provided, and in that these additional ducts are filled with an insulating gas.

Eine vorteilhafte Ausführungsform der Erfindung besteht darin, daß die im Inneren von Kühlkanälen durchsetzte Oberspannungswicklung allseitig von mit Isoliergas gefüllten Kanälen umgeben ist, daß die räumlich radial zwischen der Oberspannungswicklung und dem Eisenkern liegende Unterspannungswicklung nur auf ihrem äußeren Mantel und ihren Stirnseiten von mit Isoliergas gefüllten Kanälen umfaßt ist und daß innerhalb eines für die Unterspannungswicklung und jeden Eisenkern gemeinsamen Gießharzkörpers lediglich Kühlkanäle vorgesehen sind und daß darüber hinaus die Anschlußleiter der Oberspannungswicklung im wesentlichen durch Isoliergas isoliert sind.An advantageous embodiment of the invention is that the high-voltage winding penetrated inside the cooling channels is surrounded on all sides by channels filled with insulating gas, and that the undervoltage winding lying radially between the high-voltage winding and the iron core is only on its outer jacket and its end faces by channels filled with insulating gas is included and that only cooling channels are provided within a cast resin body common to the undervoltage winding and each iron core, and in addition that the connecting conductors of the high-voltage winding are essentially insulated by insulating gas.

In dieser Anordnung besteht zweckmäßigerweise die Oberspannungswicklung aus räumlich axial übereinander angeordneten, elektrisch in.Reihe geschalteten und aus spulenbreitem Blechband gewickelten Spulen und ist die Unterspannungswicklung von einem spiralig aufgewickelten Blechband dargestellt, dessen Breite gleich der axialen Spulenlänge ist.In this arrangement, the high-voltage winding expediently consists of coils spatially arranged axially one above the other, electrically connected in series and wound from coil-wide sheet metal strip, and the undervoltage winding is represented by a spirally wound sheet-metal strip, the width of which is equal to the axial coil length.

Zweckmäßige Weiterbildungsmerkmale der Erfindung bestehen darin, daß ein die Kühlkanäle durchströmendes Kühlmittel elektrisch isolierend ist und in den Kuhlkanälen versa und daß als Isoliergas in den zusätzlichen Kanälen unter Überdruck stehendes SF6 dient.Advantageous further development features of the invention consist in that a coolant flowing through the cooling channels is electrically insulating and versa in the cooling channels and that SF 6, which is under pressure, serves as insulating gas in the additional channels.

Vorteilhafterweise sind die Kühlkanäle und die zusätzlichen Kanäle zu je einem selbständigen Kanalsystem verbunden, dessen Innendruck an je einem dem jeweiligen Kanalsystem zugeordneten Wärmetauscher und/oder Reservebehälter einstellbar ist, wobei der Innendruck in den Kühlkanälen unabhängig vom Betriebszustand immer zwischen dem Umgebungsdruck des Transformators und dem Druck in den zusätzlichen Kanälen liegt.Advantageously, the cooling channels and the additional channels are each connected to an independent channel system, the internal pressure of which can be set on a heat exchanger and / or reserve tank assigned to the respective channel system, the internal pressure in the cooling channels always being independent of the operating state between the ambient pressure of the transformer and the pressure lies in the additional channels.

Zur sicheren Beherrschung auch höhere Drücke in den zusätzlichen Kanälen sind deren Umfassungswände mit Glasfasern verstärkt.In order to master even higher pressures in the additional channels, the surrounding walls are reinforced with glass fibers.

Zur Verminderung der Geräuschabstrahlung der erfindungsgemäß ausgeführten Transformatoren sind die die Oberspannungs- und die Unterspannungswicklungen enthaltenden Gießharzkörper gegenüber dem Eisen-kern federnd eingespannt und dienen dadurch als Dämmwände für vom Eisenkern ausgestrahlte Geräusche.In order to reduce the noise radiation of the transformers designed according to the invention, the cast resin bodies containing the high-voltage and low-voltage windings are resiliently clamped in relation to the iron core and thereby serve as insulation walls for noise emitted by the iron core.

Der erfindungsgemäße Aufbau von Transformatoren ist sehr vorteilhaft, weil er durch Verringerung der erforderlichen Gießharzmenge und der absoluten Wicklungsabmessungen den Anwendungsbereich von gießharzisolierten Transformatoren in Richtung auf größere Nennleistungen erweitert und darüberhinaus auch deren Einsatz bei höheren als bisher beherrschbaren Nennspannungen ermöglicht.The construction of transformers according to the invention is very advantageous because, by reducing the amount of cast resin required and the absolute winding dimensions, it extends the field of application of cast-resin-insulated transformers in the direction of larger rated powers and also enables them to be used at higher than previously controllable rated voltages.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert:

  • Ein Kernschenkel 1 wird von einer Unterspannungswicklung 2 umfaßt. Der Kernschenkel 1 ist in bekannter Weise aus Blechlamellen geschichtet und in nicht näher dargestellter Art und Weise über Joche 3 mit weiteren Kernschenkeln 1 eines Drehstromtransformators verbunden.
An embodiment of the invention is explained in more detail with reference to a drawing:
  • A core leg 1 is surrounded by an undervoltage winding 2. The core leg 1 is in a known manner layered from sheet metal lamellae and connected in a manner not shown via yokes 3 with further core legs 1 of a three-phase transformer.

Die eigentliche Unterspannungswicklung 2 besteht aus Blechband, dessen Breite gleich der Wicklungslänge ist und ist nach dem Wickeln in einen Körper 4 aus Gießharz eingegossen. Dabei sind in und um die Unterspannungswicklung 2 Kühlkanäle 5 vorgesehen.The actual undervoltage winding 2 consists of sheet metal strip, the width of which is equal to the winding length and, after winding, is cast into a body 4 made of casting resin. 2 cooling channels 5 are provided in and around the undervoltage winding.

Eine ihrerseits wieder die Unterspannungswicklung-2 umfassende Oberspannungswicklung ist aus einer Vielzahl von axial übereinander angeordneten Spulen 6 aufgebaut. Die einzelnen Spulen 6 sind aus spulenbreitem Blechband gewickelt und elektrisch in Reihe geschaltet. Die Spulen 6 sind durch einen Körper 7 aus Gießharz mechanisch miteinander verbunden. Der Körper 7 und die Spulen 6 bildengemeinsam ein Gitter aus radialen Kühlkanälen 8 und axialen Kühlkanälen 9.A high-voltage winding, which in turn comprises undervoltage winding 2, is constructed from a large number of coils 6 arranged axially one above the other. The individual coils 6 are wound from coil-wide sheet metal strip and electrically connected in series. The coils 6 are mechanically connected to one another by a body 7 made of cast resin. The body 7 and the coils 6 together form a grid of radial cooling channels 8 and axial cooling channels 9.

Die kreisringförmigen Stirnflächen des die Spulen 6 umfassenden Körpers 7 sind durch Verschlußringe 10 gasdicht abgedeckt, wobei zwischen dem Körper 7 und den Verschlußringen 10 Dichtringe 12 eingespannt sind. Der Hohlraum der Verschlußringe 10 steht über Kanäle 11 mit dem Gitter aus den Kühlkanälen 8 und 9 in Verbindung und dient gleichzeitig als Sammelkammer bei der Zu- und Ableitung des Kühlmittels in die Oberspannungswicklung.The annular end faces of the body 7 comprising the coils 6 are gas-tightly covered by locking rings 10, 10 sealing rings 12 being clamped between the body 7 and the locking rings. The cavity of the locking rings 10 is connected via channels 11 to the grid from the cooling channels 8 and 9 and at the same time serves as a collecting chamber for the supply and discharge of the coolant into the high-voltage winding.

Der Eisenkern aus den Kernschenkeln 1 und den Jochen 3 sowie die Unterspannungswicklung 2 in dem Körper 4 und die aus den Spulen 6 aufgebaute Oberspannupgswicklung im Körper 7 sind durch einen Mantel 14 und durch Deckel 13 nach außen hin abgekapselt. Dabei bildet der Mantel 14 mit dem äußeren Mantel des Körpers 7 sowie die Deckel 13 mit den Verschlußringen 10 Kanäle 15, die durch nicht dargestellte, vorzugsweise an die vorhandenen Gießharzkörper angeformte, Distanzstücke offengehalten werden.The iron core from the core legs 1 and the yokes 3 as well as the undervoltage winding 2 in the body 4 and the upper voltage winding in the body 7 constructed from the coils 6 are encapsulated to the outside by a jacket 14 and a cover 13. The jacket 14 forms with the outer jacket of the body 7 and the cover 13 with the locking rings 10 channels 15 through which, not shown, preferably to the existing casting resin body-shaped, spacers are kept open.

Auf der Innenseite der Deckel 13 sind Stützwände 17 zum Einspannen der Unterspannungswicklung 2 vorgesehen. Durch entsprechende Gestaltung der Stützwände 17 befinden sich zwischen diesen und der Außenwand des jeweils zugehörigen Deckels 13 Kanalfortsätze 16, die mit den Kanälen 15 direkt verbunden sind.On the inside of the cover 13, support walls 17 are provided for clamping the undervoltage winding 2. By appropriate design of the support walls 17 13 channel extensions 16 are located between them and the outer wall of the associated cover, which are directly connected to the channels 15.

Die Stützwände 17 bilden Kammern 18 vor den Stirnseiten der Unterspannungswicklung 2. Die Kammern 18 sind-mit den Kühlkanälen 5 in der Unterspannungswicklung 2 verbunden und in Richtung auf die Kernschenkel 1 und die Joche 3 hin offen und dienen als Kühlmittelsammelbehälter für die Ab- und Zufuhr von Kühlmittel zur Unterspannungswicklung 2 und dem Eisenkern.The support walls 17 form chambers 18 in front of the end faces of the undervoltage winding 2. The chambers 18 are connected to the cooling channels 5 in the undervoltage winding 2 and open in the direction of the core legs 1 and the yokes 3 and serve as coolant collecting containers for the discharge and supply p coolant to Unters annungswicklung 2 and the iron core.

Die Berührungsflächen zwischen den Deckeln 13 und dem Mantel 14 sowie zwischen den Stützwänden 17 und dem die Unterspannungswicklüng 2 tragenden Körper 4 liegen nicht unittelbar aufeinander, sondern pressen Dichtringe 12, durch die die Spalte zwischen diesen Bauteilen gasdicht verschlossen sind. Dadurch ist es möglich die Kanäle 15 und die Kanalfortsätze 16 mit einem unter Überdruck stehenden Isoliergas, beispielsweise SF6, zu füllen, so daß auch hohe elektrische Nennspannungen an der Oberspannungswicklung sicher beherrscht sind.The contact surfaces between the covers 13 and the casing 14 and between the support walls 17 and the body 4 carrying the undervoltage winding 2 do not lie directly on one another, but instead press sealing rings 12, by means of which the gaps between these components are sealed gas-tight. This makes it possible to fill the channels 15 and the channel extensions 16 with an insulating gas which is under pressure, for example SF 6 , so that even high electrical nominal voltages on the high-voltage winding are safely controlled.

Der Eisenkern aus den Kernschenkeln 1 und den Jochen 3 ist federnd zwischen den Deckeln 13 eingespannt und dadurch schwingungstechnisch von den Wicklungen entkoppelt. - The iron core from the core legs 1 and the yokes 3 is resiliently clamped between the covers 13 and is thus decoupled from the windings in terms of vibration technology. -

Die Kammern in den Verschlußringen 10 und die Kammern 18 sind in nicht dargestellter Weise mit einem Ausgleichsgefäß und mit einer Rückkühleinrichtung für das die Kühlkanäle 5, 8 und 9 durchströmende Kühlmittel verbunden. Als Kühlmittel dient dabei zweckmäßigerweise eine nicht brennbare Flüssigkeit, deren Siedetemperatur bei dem in den Kanälen vorgesehenen Betriebsdruck in der Nähe der Betriebstemperatur der Unterspannungswicklung 2 und der Oberspannungswicklung liegt.The chambers in the closure rings 10 and the chambers 18 are connected in a manner not shown with a compensating vessel and with a recooling device for the coolant flowing through the cooling channels 5, 8 and 9. A non-flammable liquid is expediently used as the coolant, the boiling temperature of which, at the operating pressure provided in the channels, is close to the operating temperature of the undervoltage winding 2 and the high-voltage winding.

Durch entsprechende Gestaltung und Bemessung der Körper 4 und 7 aus Gießharz sowie der mit Isoliergas gefüllten Kanäle 15 besteht die Möglichkeit, den Mantel 14 und die Deckel 13 zumindest teilweise aus elektrisch leitendem, metallischen Werkstoff herzustellen. By appropriate design and dimensioning of the body 4 and 7 made of cast resin and the channels 15 filled with insulating gas, there is the possibility of at least partially producing the jacket 14 and the cover 13 from an electrically conductive, metallic material.

Claims (10)

1. Transformator mit Eisenkern und vollständig in Gießharz eingebetteten Oberspannungs- und Unterspannungswicklungen und mit in dem die Wicklungen haltenden und isolierenden Gießharz angeordneten Kühlkanälen, dadurch gekennzeichnet, daß zusätzlich und getrennt von den Kühlkanälen (5, 8 und 9) mindestens im Hauptstreukanal weitere vom Gießharz umschlossene Kanäle (15, 16) vorgesehen sind und daß diese zusätzlichen Kanäle (15, 16) mit einem Isoliergas gefüllt sind.1. transformer with iron core and completely embedded in casting resin high-voltage and undervoltage windings and with cooling channels arranged in the winding-holding and insulating casting resin, characterized in that in addition and separately from the cooling channels (5, 8 and 9) at least in the main scattering channel further from the casting resin enclosed channels (15, 16) are provided and that these additional channels (15, 16) are filled with an insulating gas. 2. Transformator nach Anspruch 1, dadurch gekennzeichnet , daß die im Inneren von Kühlkanälen (8, 9) durchsetzte Oberspannungswicklung allseitig von mit Isoliergas gefüllten Kanälen (15) umgeben ist, daß die räumlich radial zwischen der Oberspannungswicklung und dem Kernschenkel (1) liegende Unterspannungswicklung (2) nur auf ihrem äußeren Mantel und ihren Stirnseiten von mit Isoliergas gefüllten Kanälen (15, 16) umfaßt ist, daß innerhalb eines für die Unterspannungswicklung (2) und den Eisenkern (1, 3) gemeinsamen Gießharzkörpers (4) lediglich Kühlkanäle (5) vorgesehen sind und daß die Anschlußleiter der Oberspannu-ngswicklung im wesentlichen durch Isoliergas isoliert sind.2. Transformer according to claim 1, characterized in that the inside of cooling channels (8, 9) penetrated high-voltage winding is surrounded on all sides by channels filled with insulating gas (15) that the spatially radially between the high-voltage winding and the core leg (1) lying undervoltage winding (2) only on its outer jacket and its end faces of channels (15, 16) filled with insulating gas is that only cooling channels (5) within a cast resin body (4) common to the undervoltage winding (2) and the iron core (1, 3) ) are provided and that the connection conductors of the upper voltage winding are essentially insulated by insulating gas. 3. Transformator nach Anspruch 1 und 2, dadurch gekennzeichnet , daß die Oberspannungswicklung aus räumlich axial übereinander angeordneten elektrisch in Reihe geschalteten und aus spulenbreitem Blechband gewickelten Spulen (6) besteht und daß die Unterspannungswicklung (2) von einem spiralig aufgewickelten Blechband dargestellt ist, dessen Breite gleich der axialen Spulenlänge ist.3. Transformer according to claim 1 and 2, characterized in that the high-voltage winding consists of spatially axially one above the other electrically connected in series and wound from coil-wide sheet metal coils (6) and that the undervoltage winding (2) is represented by a spirally wound sheet-metal strip, the Width is equal to the axial coil length. 4. Transformator nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß ein die Kühlkanäle (5, 8, 9) durchströmendes Kühlmittel elektrisch isolie- . rend ist.4. Transformer according to claim 1 to 3, characterized in that a coolant flowing through the cooling channels (5, 8, 9) electrically isolating. is rend. 5. Transformator nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß das Kühlmittel in den Kühlkanälen (5, 8, 9) verdampft.5. Transformer according to claim 1 to 4, characterized in that the coolant in the cooling channels (5, 8, 9) evaporates. 6. Transformator nach Anspruch 1 bis 5, dadurch gekennzeichnet , daß als Isoliergas-in den zusätzlichen Kanälen (15, 16) unter Überdruck stehendes SF6 dient.6. Transformer according to claim 1 to 5, characterized in that SF 6 is used as insulating gas in the additional channels (15, 16) under pressure. 7. Transformator nach Anspruch 1 bis 6, dadurch gekennzeichnet , daß die Kühlkanäle (5, 8, 9) und die zusätzlichen Kanäle (15, 16) zu je einem selbständigen Kanalsystem verbunden sind, dessen Innendruck an je einem dem jeweiligen Kanalsystem zugeordneten Wärmetauscher und/oder Reservebehälter einstellbar ist.7. Transformer according to claim 1 to 6, characterized in that the cooling channels (5, 8, 9) and the additional channels (15, 16) are each connected to an independent channel system, the internal pressure of which is assigned to each channel system and heat exchanger / or reserve container is adjustable. 8. Transformator nach Anspruch 1 bis 7, dadurch ggekennzeichnet , daß der Innendruck in den Kühlkanälen (5, 8, 9) unabhängig vom Betriebszustand immer zwischen dem Umgebungsdruck des Transformators und dem Druck in den zusätzlichen Kanälen (15, 16) liegt.8. Transformer according to claim 1 to 7, characterized in that the internal pressure in the cooling channels (5, 8, 9) is always independent of the operating state between the ambient pressure of the transformer and the pressure in the additional channels (15, 16). 9. Transformator nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß Umfassungswände der mit Isoliergas gefüllten zusätzlichen Kanäle (15, 16) mit Glasfasern verstärkt sind.9. Transformer according to claim 1 to 8, characterized in that the surrounding walls of the filled with insulating gas additional channels (15, 16) are reinforced with glass fibers. 10. Transformator nach Anspruch 1 bis 9, dadurch gekennzeichnet , daß die die Oberspannungs-und die Unterspannungswicklung (2) enthaltenden Gießharzkörper (4, 7) gegenüber dem Eisenkern (1, 3) federnd eingespannt sind und als Dämmwände für vom Eisenkern (1, 3) ausgestrahlte Geräusche dienen.10. Transformer according to claim 1 to 9, characterized in that the high-voltage and low-voltage winding (2) containing cast resin body (4, 7) with respect to the iron core (1, 3) are resiliently clamped and as insulation walls for the iron core (1, 3) serve emitted noises.
EP82108563A 1981-09-30 1982-09-16 Transformer with windings embedded in cast resin Expired EP0075796B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82108563T ATE17172T1 (en) 1981-09-30 1982-09-16 TRANSFORMER WITH WINDINGS EMBEDDED IN RESIN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3138909 1981-09-30
DE19813138909 DE3138909A1 (en) 1981-09-30 1981-09-30 TRANSFORMER WITH COMPLETELY EMBEDDED IN RESIN

Publications (2)

Publication Number Publication Date
EP0075796A1 true EP0075796A1 (en) 1983-04-06
EP0075796B1 EP0075796B1 (en) 1985-12-27

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ID=6143053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108563A Expired EP0075796B1 (en) 1981-09-30 1982-09-16 Transformer with windings embedded in cast resin

Country Status (5)

Country Link
US (1) US4488134A (en)
EP (1) EP0075796B1 (en)
JP (1) JPS5871609A (en)
AT (1) ATE17172T1 (en)
DE (2) DE3138909A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102513A1 (en) * 1982-08-06 1984-03-14 Transformatoren Union Aktiengesellschaft Air-cooled transformer with windings embedded in cast resin
EP0159387A1 (en) * 1984-04-03 1985-10-30 Hydro-Quebec Distribution transformer with coiled magnetic circuit
EP0766273A3 (en) * 1995-09-28 1997-07-16 Makoto Yamamoto Transformer structure
US6204243B1 (en) 1993-09-01 2001-03-20 Novatis Ag Pharmaceutical preparations for the targeted treatment of crohn's disease and ulcerative colitis
WO2010000005A1 (en) * 2008-06-30 2010-01-07 Coil Innovation Gmbh Inductance coil for electric power grids having reduced sound emission

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US5588201A (en) * 1991-03-21 1996-12-31 Siemens Aktiengesellschaft Process for producing a cast resin coil
US5383266A (en) * 1993-03-17 1995-01-24 Square D Company Method of manufacturing a laminated coil to prevent expansion during coil loading
US5461772A (en) * 1993-03-17 1995-10-31 Square D Company Method of manufacturing a strip wound coil to reinforce edge layer insulation
US5267393A (en) * 1993-03-17 1993-12-07 Square D Company Method of manufacturing a strip wound coil to eliminate lead bulge
US5396210A (en) * 1993-03-17 1995-03-07 Square D Company Dry-type transformer and method of manufacturing
JP2001351820A (en) * 2000-06-07 2001-12-21 Mitsubishi Electric Corp Electric apparatus
US7023312B1 (en) 2001-12-21 2006-04-04 Abb Technology Ag Integrated cooling duct for resin-encapsulated distribution transformer coils
JP4466684B2 (en) * 2007-06-12 2010-05-26 トヨタ自動車株式会社 Reactor
DE102008055882A1 (en) * 2008-11-03 2010-05-06 Siemens Aktiengesellschaft Holding device for a cast resin transformer winding
US7911308B2 (en) * 2008-11-26 2011-03-22 Rippel Wally E Low thermal impedance conduction cooled magnetics
US8118086B2 (en) 2009-06-16 2012-02-21 Uop Llc Efficient self cooling heat exchanger
US8122946B2 (en) * 2009-06-16 2012-02-28 Uop Llc Heat exchanger with multiple channels and insulating channels
US8631858B2 (en) * 2009-06-16 2014-01-21 Uop Llc Self cooling heat exchanger with channels having an expansion device
US9478347B2 (en) * 2009-06-30 2016-10-25 Abb Technology Ag Dry type transformer with improved cooling
US7834736B1 (en) 2009-07-31 2010-11-16 Abb Technology Ag Dry type pole-mounted transformer
KR101635662B1 (en) * 2009-10-19 2016-07-01 에이비비 테크놀로지 아게 Transformer
US9640314B2 (en) 2010-04-07 2017-05-02 Abb Schweiz Ag Outdoor dry-type transformer
US10826297B2 (en) * 2018-11-06 2020-11-03 General Electric Company System and method for wind power generation and transmission in electrical power systems

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DE1230902B (en) * 1962-05-16 1966-12-22 Liebknecht Transformat Layer winding for high voltage transformers
DE2826299A1 (en) * 1978-06-15 1979-12-20 Transformatoren Union Ag MULTI-PHASE TRANSFORMER FOR POWER TRANSFER IN A SUPPLY NETWORK

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102513A1 (en) * 1982-08-06 1984-03-14 Transformatoren Union Aktiengesellschaft Air-cooled transformer with windings embedded in cast resin
EP0159387A1 (en) * 1984-04-03 1985-10-30 Hydro-Quebec Distribution transformer with coiled magnetic circuit
US6204243B1 (en) 1993-09-01 2001-03-20 Novatis Ag Pharmaceutical preparations for the targeted treatment of crohn's disease and ulcerative colitis
EP0766273A3 (en) * 1995-09-28 1997-07-16 Makoto Yamamoto Transformer structure
WO2010000005A1 (en) * 2008-06-30 2010-01-07 Coil Innovation Gmbh Inductance coil for electric power grids having reduced sound emission
US8339234B2 (en) 2008-06-30 2012-12-25 Coil Holding Gmbh Inductance coil for electric power grids with reduced sound emission

Also Published As

Publication number Publication date
ATE17172T1 (en) 1986-01-15
JPS5871609A (en) 1983-04-28
EP0075796B1 (en) 1985-12-27
DE3268149D1 (en) 1986-02-06
US4488134A (en) 1984-12-11
DE3138909A1 (en) 1983-04-14

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