EP2827346A1 - Dry type transformer coil and dry type transformer - Google Patents

Dry type transformer coil and dry type transformer Download PDF

Info

Publication number
EP2827346A1
EP2827346A1 EP20130003609 EP13003609A EP2827346A1 EP 2827346 A1 EP2827346 A1 EP 2827346A1 EP 20130003609 EP20130003609 EP 20130003609 EP 13003609 A EP13003609 A EP 13003609A EP 2827346 A1 EP2827346 A1 EP 2827346A1
Authority
EP
European Patent Office
Prior art keywords
dry
transformer coil
core
cooling
hollow cylindrical
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
EP20130003609
Other languages
German (de)
French (fr)
Other versions
EP2827346B1 (en
Inventor
Benjamin Weber
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.)
ABB Schweiz AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Priority to ES13003609.8T priority Critical patent/ES2616270T3/en
Priority to EP13003609.8A priority patent/EP2827346B1/en
Priority to PCT/EP2014/061708 priority patent/WO2015007432A1/en
Publication of EP2827346A1 publication Critical patent/EP2827346A1/en
Application granted granted Critical
Publication of EP2827346B1 publication Critical patent/EP2827346B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H01F27/2876—Cooling
    • 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
    • H01F27/085—Cooling by 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • 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 the execution of a dry-type transformer coil.
  • the invention also relates to a dry-type transformer having a dry-type transformer coil according to the invention.
  • dry-type transformers are used in power distribution networks to adapt to respective voltage levels, for example between 6kV / 10kV / 30kV or 60kV levels. Power ratings of some 100kVA to over 10MVA are common. While the use of oil as cooling and insulating means is indispensable for high-voltage transformers, for example at the 380kV voltage level, dry transformers deliberately do not use a liquid cooling or insulating agent due to the lower insulation requirements in the corresponding underlying voltage levels. This offers the advantage of a simplified structure. The insulation or cooling then typically takes place via ambient air.
  • the object is achieved by a dry-type transformer coil of the aforementioned type. This is characterized in that the filling factor of the hollow-cylindrical intermediate space with cooling channels varies over its radial extent.
  • the basic idea of the invention is to arrange the cooling channels, which are arranged in a hollow cylindrical space of a dry transformer coil, not just with a uniform, but with a non-uniform cooling channel density in such a way that in the installed state of a dry transformer coil taking into account the given flow conditions as homogeneous as possible Flow through the cooling channels results.
  • a transformer When installed in a transformer, such as a three-phase transformer, dry-type transformer coils are disposed about a respective leg of a transformer core.
  • a transformer core In a three-phase transformer, for example, there are core designs with three or five parallel core legs arranged in a common vertical plane, which are connected by a respective core yoke running underneath or above it.
  • Kernjoche therefore shading of the preferably vertical cooling channels, so that there is a different flow resistance for flowing through the cooling air channels.
  • flows through the shadowed cooling channels due to the higher flow resistance a lower air flow than through the unshaded cooling channels, if a homogeneous Fill factor with cooling channels over the entire cross section of the hollow cylindrical space is required.
  • a fill factor is defined in the context of the subject invention as the ratio of active cooling channel cross-sectional area over a respective portion of the base of the hollow cylindrical space to the base itself.
  • the filling factor would be close to one for the relevant subsection.
  • the fill factor in this section would be 50%.
  • a high fill factor in a subsection is therefore equivalent to a low flow resistance.
  • a region-wise variation of the filling factor can be effected for example by a corresponding material thickness of strip elements, by which the cooling channels are formed.
  • the dimensioning of the respective suitable filling factor along the circumference of the hollow cylindrical space is based on the given flow conditions and the typical operating parameters of the transformer.
  • a flow through the cooling channels can be done only by natural convection, but the transformer can also have a cooling fan and be installed in a housing.
  • the variation of the filling factor is effected by an at least partially narrowing of at least one axial partial region of at least one cooling channel.
  • the division of the hollow cylindrical space into completely identical cooling channels is namely particularly easy to implement.
  • a respective constriction of a cooling channel is effected by a constriction element arranged therein or in front of it.
  • a respective constriction element is made of an insulating material.
  • the insulating ability of the likewise preferred manner made of an insulating material cooling channels is not adversely affected.
  • At least one constriction element is produced from a plurality of modules with different coefficients of thermal expansion.
  • a temperature-dependent narrowing of the cross section of a cooling channel can be achieved in an advantageous manner.
  • the at least one constriction element is designed and arranged such that the flow resistance is reduced by the respective cooling channel with increasing temperature.
  • a locally elevated temperature automatically results in a locally improved cooling effect.
  • a corresponding embodiment includes, for example tongue-like constriction element, which protrudes into the cooling channel and similar to the behavior of a bimetallic strip has a temperature-dependent bending behavior. At an elevated temperature, the bend is reduced and an increased cross-section of the cooling channel is released.
  • a dry-type transformer comprising a transformer core with at least two core yokes and with at least two core limbs, wherein a dry-type transformer coil according to the invention is arranged around at least one core limb, wherein the fill factor of the hollow-cylindrical gap is varied in such a way that it flows in from the core yokes frontally shaded areas is higher than in the unshaded areas.
  • this results in a homogeneous flow through the respective cooling channels with coolant, such as air, at least for a preferred operating state of the dry-type transformer despite the shadowing.
  • the latter is forcedly cooled and therefore has, for example, a conveying means for cooling air, for example a blower.
  • a conveying means for cooling air for example a blower.
  • the pressure conditions at the front-side inlets of the respective cooling channels arising from a fan must be considered when designing a suitable filling factor distribution.
  • FIG. 1 shows an exemplary dry-type transformer coil 10 in a plan view of one of the two end faces.
  • a first 12 and a second 14 winding of the dry-type transformer coil 10 are nested in each other and spaced from one another.
  • a plurality of exemplary sections 18, 20, 22, 24, 26, 28 provide several examples of arrangements of cooling channels 30, 32, 34, 36, each with different filling factors.
  • Cooling channels 30 are provided in the first 18 and second 20 sections, which are tangentially spaced in the first section 18, which results in a lower filling factor than in the second section 20, where the cooling channels 30 are tangent to one another.
  • tangentially adjoining cooling channels 32 are arranged, which, however, have a respective constriction element 38 in their interior, so that a reduced filling factor is also given in the third section.
  • Cooling channels 34 of smaller diameter than the cooling channels 30 and 32 are arranged in the fourth 24 and fifth 26 sections. In the fourth section 24, these are arranged tangentially adjacent one another in a single layer and tangentially adjacent to each other in the fifth section 26 so that the fifth section 26 has an approximately twice the filling factor as the fourth section 24.
  • tangentially arranged strip elements are provided for spacing, by the thickness of which the filling factor in the sixth section 28 is ultimately determined.
  • FIG. 2 shows an exemplary core leg 42 with a dry-type transformer coil in a diagram 40.
  • the core leg 42 is aligned along a rotation axis 44, about which radially symmetrically arranged first 46 and second 48 windings of the transformer coil are arranged.
  • a cooling channel 50 is formed at the upper end of a constriction element 50 is inserted.
  • the flow resistance through the cooling channel 50 is artificially increased, whereby the effective effective filling factor for this area of the hollow cylindrical Space is reduced. Cooling air enters from the lower end face in the cooling channel 50 and at its upper end face again out, as indicated by the arrows with the reference numeral 54 and 56.
  • the Fig. 3 shows an exemplary transformer core with arranged thereon dry-transformer coils 62, 64, 66 in a plan view 60.
  • the transformer core has three legs, which are connected at its two respective ends with a transverse thereto extending yoke 70.
  • Respective cooling channels are formed in respective hollow cylindrical spaces 68 of the dry-type transformer coils 62, 64, 66.
  • the upper 70 and lower yokes are spaced from the respective axial end faces of the dry-transformer coils 62, 64, 66 so that airflow in the shadowed areas 72, 74, 76, 78 can not enter the cooling passages unhindered.
  • the constriction point thus formed is compensated according to the invention by an increased fill factor in the corresponding areas of the hollow cylindrical space, so that there is an approximately equal flow resistance for the all cooling channels taking into account a respective shading.

Landscapes

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

Abstract

Die Erfindung betrifft eine Trockentransformatorspule (10, 62, 64, 66), umfassend wenigstens zwei hohlzylindrische, ineinander verschachtelte und radial beabstandete Wicklungen (12, 14, 46, 48) beziehungsweise Wicklungsteile, wobei in dem durch die Beabstandung gebildeten hohlzylindrischen Zwischenraum (16, 68) axial verlaufende Kühlkanäle (30, 32, 34, 36, 50) angeordnet sind. Der Füllfaktor des hohlzylindrischen Zwischenraumes (16, 68) mit Kühlkanälen (30, 32, 34, 36, 50) variiert über dessen radialen Umfang. Die Erfindung betrifft auch einen Trockentransformator (60), umfassend einen Transformatorkern mit wenigstens zwei Kernjochen (70) und mit wenigstens zwei Kernschenkeln (42), wobei um wenigstens einen Kernschenkel (42) eine erfindungsgemäße Trockentransformatorspule (10, 62, 64, 66) angeordnet ist. Der Füllfaktor des hohlzylindrischen Zwischenraums (16, 68) ist derart variiert, dass er in von den Kernjochen (70) stirnseitig abgeschatteten Bereichen (72, 74, 76, 78) höher ist als in den nicht abgeschatteten Bereichen.The invention relates to a dry-type transformer coil (10, 62, 64, 66) comprising at least two hollow-cylindrical, interleaved and radially spaced windings (12, 14, 46, 48) or winding parts, wherein in the hollow-cylindrical gap (16, 14) formed by the spacing. 68) axially extending cooling channels (30, 32, 34, 36, 50) are arranged. The fill factor of the hollow cylindrical space (16, 68) with cooling channels (30, 32, 34, 36, 50) varies over its radial circumference. The invention also relates to a dry-type transformer (60), comprising a transformer core having at least two core yokes (70) and at least two core limbs (42), wherein a dry-transformer coil (10, 62, 64, 66) according to the invention is arranged around at least one core limb (42) is. The filling factor of the hollow cylindrical space (16, 68) is varied so as to be higher in areas (72, 74, 76, 78) frontally shadowed by the core yokes (70) than in the unshaded areas.

Description

Die Erfindung betrifft die Ausführung einer Trockentransformatorspule. Die Erfindung betrifft auch einen Trockentransformator mit einer erfindungsgemäßen Trockentransformatorspule.The invention relates to the execution of a dry-type transformer coil. The invention also relates to a dry-type transformer having a dry-type transformer coil according to the invention.

Es ist allgemein bekannt, dass Trockentransformatoren in Energieverteilungsnetzen zur Anpassung an jeweilige Spannungsebenen verwendet werden, beispielsweise zwischen 6kV / 10kV / 30kV oder 60kV Ebenen. Hierbei sind Nennleistungen von einigen 100kVA bis über 10MVA üblich. Während bei Höchstspannungstransformatoren - beispielsweise in der Spannungsebene 380kV - die Verwendung von Öl als Kühl- und Isolationsmittel unumgänglich ist, wird bei Trockentransformatoren aufgrund der geringeren Isolationsanforderungen in den entsprechen darunter liegenden Spannungsebenen bewusst auf eine ein flüssiges Kühl- beziehungsweise Isolationsmittel verzichtet. Dies bietet den Vorteil eines vereinfachten Aufbaus. Die Isolation beziehungsweise Kühlung erfolgt dann typischerweise über Umgebungsluft.It is well known that dry-type transformers are used in power distribution networks to adapt to respective voltage levels, for example between 6kV / 10kV / 30kV or 60kV levels. Power ratings of some 100kVA to over 10MVA are common. While the use of oil as cooling and insulating means is indispensable for high-voltage transformers, for example at the 380kV voltage level, dry transformers deliberately do not use a liquid cooling or insulating agent due to the lower insulation requirements in the corresponding underlying voltage levels. This offers the advantage of a simplified structure. The insulation or cooling then typically takes place via ambient air.

Aufgrund der im Vergleich zu Öl geringeren Wärmekapazität erweist sich die Kühlung eines Trockentransformators beziehungsweise der jeweiligen Trockentransformatorspulen mit Luft als schwierig und aufwändig. Es ist neben einer Vielzahl von die Trockentransformatorspule axial durchquerenden Kühlkanälen je nach Leistungsklasse üblicherweise auch eine forcierte Kühlung vorzusehen. Je nach Leistungsklasse erfordert eine forcierte Kühlung einen erheblichen Aufwand aufgrund der Notwendigkeit einer entsprechenden Förderung des Kühlmittels Luft durch die Kühlkanäle. Es gibt aber auch durchaus Trockentransformatorvarianten mit natürlicher Kühlung. Diese sind aber aufgrund der limitierten Kühlwirkung deutlichen Einschränkungen in deren maximaler Leistung unterworfen.Due to the lower heat capacity compared to oil, the cooling of a dry-type transformer or of the respective dry-type transformer coils with air proves to be difficult and expensive. Depending on the power class, it is customary to provide forced cooling in addition to a large number of cooling passages that axially traverse the dry-transformer coil. Depending on the performance class, forced cooling requires considerable effort due to the necessity a corresponding promotion of the coolant air through the cooling channels. But there are also quite dry transformer variants with natural cooling. However, these are subject to significant limitations in their maximum performance due to the limited cooling effect.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine Trockentransformatorspule anzugeben, welche ein verbessertes Kühlverhalten aufweist beziehungsweise ein vorhandenes Strömungsvolumen an Kühlmittel möglichst effektiv nutzt. Es ist ebenfalls Aufgabe der Erfindung, einen Trockentransformator mit verbessertem Kühlverhalten anzugeben.Based on this prior art, it is an object of the invention to provide a dry-type transformer coil, which has an improved cooling behavior or uses an existing flow volume of coolant as effectively as possible. It is also an object of the invention to provide a dry-type transformer with improved cooling behavior.

Die Aufgabe wird gelöst durch eine Trockentransformatorspule der eingangs genannten Art. Diese ist dadurch gekennzeichnet, dass der Füllfaktor des hohlzylindrischen Zwischenraumes mit Kühlkanälen über dessen radialen Umfang variiert.The object is achieved by a dry-type transformer coil of the aforementioned type. This is characterized in that the filling factor of the hollow-cylindrical intermediate space with cooling channels varies over its radial extent.

Die Grundidee der Erfindung besteht darin, die Kühlkanäle, welche in einem hohlzylindrischen Zwischenraum einer Trockentransformatorspule angeordnet sind, gerade nicht mit einer gleichmäßigen sondern mit einer ungleichmäßigen Kühlkanaldichte anzuordnen und zwar derart, dass sich im eingebauten Zustand einer Trockentransformatorspule unter Berücksichtigung der gegebenen Strömungsverhältnisse eine möglichst homogene Durchströmung der Kühlkanäle ergibt.The basic idea of the invention is to arrange the cooling channels, which are arranged in a hollow cylindrical space of a dry transformer coil, not just with a uniform, but with a non-uniform cooling channel density in such a way that in the installed state of a dry transformer coil taking into account the given flow conditions as homogeneous as possible Flow through the cooling channels results.

Bei einem Einbau in einen Transformator, beispielsweise in einen dreiphasigen Transformator, sind Trockentransformatorspulen um einen jeweiligen Schenkel eines Transformatorkernes angeordnet. Bei einem dreiphasigen Transformator gibt es beispielsweise Kernausführungen mit drei oder fünf parallelen und in einer gemeinsamen senkrechten Ebene angeordneten Kernschenkeln, welche durch ein jeweils darunter beziehungsweise darüber verlaufendes Kernjoch verbunden sind.When installed in a transformer, such as a three-phase transformer, dry-type transformer coils are disposed about a respective leg of a transformer core. In a three-phase transformer, for example, there are core designs with three or five parallel core legs arranged in a common vertical plane, which are connected by a respective core yoke running underneath or above it.

Durch derartige Kernjoche erfolgt daher eine Abschattung der vorzugsweise senkrecht verlaufenden Kühlkanäle, so dass sich für durch die Kühlkanäle strömende Luft ein unterschiedlicher Strömungswiderstand ergibt. Als Folge dessen strömt durch die abgeschatteten Kühlkanäle aufgrund des höheren Strömungswiderstandes ein geringerer Luftstrom als durch die nicht-abgeschatteten Kühlkanäle, sofern ein homogener Füllfaktor mit Kühlkanälen über den gesamten Querschnitt des hohlzylindrischen Zwischenraums vorausgesetzt wird.By such Kernjoche therefore shading of the preferably vertical cooling channels, so that there is a different flow resistance for flowing through the cooling air channels. As a result, flows through the shadowed cooling channels due to the higher flow resistance, a lower air flow than through the unshaded cooling channels, if a homogeneous Fill factor with cooling channels over the entire cross section of the hollow cylindrical space is required.

Ein Füllfaktor wird im Rahmen des Erfindungsgegenstandes definiert als das Verhältnis von aktiver Kühlkanalquerschnittsfläche über einen jeweiligen Teilabschnitt der Grundfläche des hohlzylindrischen Zwischenraums zu der Grundfläche selbst. Für den theoretischen Fall, dass der hohlzylindrische Zwischenraum lediglich hauchdünne Membranen aufweisen würde, durch welche eine Trennung der parallel verlaufenden Kühlkanäle erfolgt, wäre für den betreffenden Teilabschnitt der Füllfaktor nahe eins. Für den Fall, dass durch entsprechende Stützleisten oder der dergleichen die Hälfte der Grundfläche eines jeweiligen Teilabschnitts verbraucht wäre, wäre der Füllfaktor in diesem Teilabschnitt bei 50%. Ein hoher Füllfaktor in einem Teilabschnitt ist daher gleichzusetzen mit einem geringen Strömungswiderstand. Eine bereichsweise Variation des Füllfaktors kann beispielsweise durch eine entsprechende Materialdicke von Leistenelementen erfolgen, durch welche die Kühlkanäle gebildet sind.A fill factor is defined in the context of the subject invention as the ratio of active cooling channel cross-sectional area over a respective portion of the base of the hollow cylindrical space to the base itself. For the theoretical case that the hollow cylindrical space would have only wafer-thin membranes, through which a separation of the parallel Cooling channels takes place, the filling factor would be close to one for the relevant subsection. In the event that half of the base area of a respective section was consumed by corresponding support strips or the like, the fill factor in this section would be 50%. A high fill factor in a subsection is therefore equivalent to a low flow resistance. A region-wise variation of the filling factor can be effected for example by a corresponding material thickness of strip elements, by which the cooling channels are formed.

Durch eine entsprechende abschnittsweise Anpassung des Füllfaktors lässt sich dadurch in vorteilhafter Weise eine Erhöhung des Strömungswiderstandes in Bereichen außerhalb der Trockentransformatorspule kompensieren. Somit ist für eine homogene Kühlung über den gesamten Spulenumfang gesorgt. Für den Fall, dass aufgrund der Anordnung der Trockentransformatorspulen ein inhomogener Kühlbedarf besteht, beispielsweise wenn benachbarte Trockentransformatorspulen gegenseitiger Wärmeeinstrahlung ausgesetzt sind, lässt sich aber auch gezielt eine inhomogene Durchstömung der Kühlkanäle entsprechend dem Kühlbedarf realisieren.By means of a corresponding section-wise adaptation of the filling factor, an increase of the flow resistance in regions outside the dry-transformer coil can thereby advantageously be compensated. This ensures homogeneous cooling over the entire circumference of the coil. In the event that due to the arrangement of the dry transformer coils an inhomogeneous cooling demand exists, for example, if adjacent dry-type transformer coils are exposed to heat radiation, but also an inhomogeneous Durchstömung the cooling channels can be realized in accordance with the cooling demand.

Die Dimensionierung des jeweiligen geeigneten Füllfaktors längs des Umfangs des hohlzylindrischen Zwischenraumes erfolgt anhand der gegebenen Strömungsbedingungen und der typischen Betriebsparameter des Transformators. Hierbei kann eine Durchströmung der Kühlkanäle lediglich anhand natürlicher Konvektion erfolgen, der Transformator kann aber auch über ein Kühlgebläse verfügen und auch in ein Gehäuse eingebaut sein.The dimensioning of the respective suitable filling factor along the circumference of the hollow cylindrical space is based on the given flow conditions and the typical operating parameters of the transformer. In this case, a flow through the cooling channels can be done only by natural convection, but the transformer can also have a cooling fan and be installed in a housing.

Gemäß einer bevorzugten Variante der erfindungsgemäßen Trockentransformatorspule ist die Variation des Füllfaktors durch eine zumindest bereichsweise erfolgende Verengung wenigstens eines axialen Teilbereiches von wenigstens einem Kühlkanal bewirkt. Konstruktiv ist die Aufteilung des hohlzylindrischen Zwischenraums in völlig gleichartige Kühlkanäle nämlich besonders einfach zu realisieren. Um dennoch auch bei eigentlich gleichartigen Kühlkanälen eine Variation des Füllfaktors zu bewirken, ist es daher erfindungsgemäß vorgesehen, einen jeweiligen Kühlkanal abschnittsweise zu verengen, wodurch dann der jeweilige Strömungswiderstand durch den Kühlkanal erhöht wird.According to a preferred variant of the dry-type transformer coil according to the invention, the variation of the filling factor is effected by an at least partially narrowing of at least one axial partial region of at least one cooling channel. Constructively, the division of the hollow cylindrical space into completely identical cooling channels is namely particularly easy to implement. In order nevertheless to effect a variation of the filling factor even with actually identical cooling channels, it is therefore provided according to the invention to constrict a respective cooling channel in sections, whereby the respective flow resistance through the cooling channel is then increased.

In besonders bevorzugter Weise erfolgt eine jeweilige Verengung eines Kühlkanals durch ein darin oder davor angeordnetes Verengungselement. Diese bieten den Vorteil, dass sie sich nachträglich in bereits gefertigte Kühlkanäle von Trockentransformatorspulen einsetzen lassen und daher kaum zusätzlichen Aufwand erfordern. Es sind sowohl Verengungselemente denkbar, welche sich direkt in einen Kühlkanal einsetzen lassen und diesen bereichsweise verengen, es sind aber auch Blendelemente denkbar, welche direkt an einer axiale Stirnseite eines jeweiligen Kühlkanals angeordnet sind.In a particularly preferred manner, a respective constriction of a cooling channel is effected by a constriction element arranged therein or in front of it. These offer the advantage that they can be used later in already manufactured cooling channels of dry transformer coils and therefore require little additional effort. There are both constriction elements conceivable, which can be used directly in a cooling channel and narrow these areas, but there are also dazzle elements conceivable, which are arranged directly on an axial end face of a respective cooling channel.

In besonders bevorzugter Weise ist ein jeweiliges Verengungselement aus einem Isolationsmaterial gefertigt. Hierdurch wird die Isolationsfähigkeit der ebenfalls bevorzugter Weise aus einem Isolationsmaterial gefertigten Kühlkanäle nicht negativ beeinträchtigt.In a particularly preferred manner, a respective constriction element is made of an insulating material. As a result, the insulating ability of the likewise preferred manner made of an insulating material cooling channels is not adversely affected.

Gemäß einer weiteren Ausführungsform der erfindungsgemäßen Trockentransformatorspule ist wenigstens ein Verengungselement aus mehreren Modulen mit unterschiedlichem Temperaturausdehnungskoeffizient gefertigt. Somit kann in vorteilhafter Weise eine temperaturabhängige Verengung des Querschnittes eines Kühlkanals erreicht werden. In einer besonders bevorzugten Variante ist daher das wenigstens eine Verengungselement derart ausgestaltet und angeordnet, dass bei steigender Temperatur der Strömungswiderstand durch den jeweiligen Kühlkanal reduziert wird. Somit hat eine lokal erhöhte Temperatur automatisch eine lokal verbesserte Kühlwirkung zur Folge. Eine entsprechende Ausführungsform umfasst beispielsweise ein zungenähnliches Verengungselement, welches in den Kühlkanal hineinragt und ähnlich dem Verhalten eines Bimetalstreifens ein temperaturabhängiges Biegeverhalten aufweist. Bei einer erhöhten Temperatur wird die Biegung reduziert und ein erhöhter Querschnitt des Kühlkanals freigegeben.According to a further embodiment of the dry-type transformer coil according to the invention, at least one constriction element is produced from a plurality of modules with different coefficients of thermal expansion. Thus, a temperature-dependent narrowing of the cross section of a cooling channel can be achieved in an advantageous manner. In a particularly preferred variant, therefore, the at least one constriction element is designed and arranged such that the flow resistance is reduced by the respective cooling channel with increasing temperature. Thus, a locally elevated temperature automatically results in a locally improved cooling effect. A corresponding embodiment includes, for example tongue-like constriction element, which protrudes into the cooling channel and similar to the behavior of a bimetallic strip has a temperature-dependent bending behavior. At an elevated temperature, the bend is reduced and an increased cross-section of the cooling channel is released.

Die erfindungsgemäße Aufgabe wird auch gelöst durch einen Trockentransformator, umfassend einen Transformatorkern mit wenigstens zwei Kernjochen und mit wenigstens zwei Kernschenkeln, wobei um wenigstens einen Kernschenkel eine erfindungsgemäße Trockentransformatorspule angeordnet ist, wobei der Füllfaktor des hohlzylindrischen Zwischenraums derart variiert ist, dass er in von den Kernjochen stirnseitig abgeschatteten Bereichen höher ist als in den nicht abgeschatteten Bereichen. Idealerweise ergibt sich hieraus zumindest für einen bevorzugten Betriebszustand des Trockentransformators trotz der Abschattungen eine homogene Durchströmung der jeweiligen Kühlkanäle mit Kühlmittel, wie zum Beispiel Luft.The object according to the invention is also achieved by a dry-type transformer, comprising a transformer core with at least two core yokes and with at least two core limbs, wherein a dry-type transformer coil according to the invention is arranged around at least one core limb, wherein the fill factor of the hollow-cylindrical gap is varied in such a way that it flows in from the core yokes frontally shaded areas is higher than in the unshaded areas. Ideally, this results in a homogeneous flow through the respective cooling channels with coolant, such as air, at least for a preferred operating state of the dry-type transformer despite the shadowing.

Gemäß einer erfindungsgemäßen Variante des Trockentransformators ist dieser forciert gekühlt, weist also beispielsweise ein Fördermittel für Kühlluft auf, beispielsweise ein Gebläse. Hierdurch wird die Effektivität der Kühlkanäle noch einmal weiter gesteigert. Die durch ein Gebläse entstehenden Druckverhältnisse an den stirnseitigen Einlässen der jeweiligen Kühlkanäle sind bei der Auslegung einer geeigneten Füllfaktorverteilung zu berücksichtigen.According to a variant of the dry-type transformer according to the invention, the latter is forcedly cooled and therefore has, for example, a conveying means for cooling air, for example a blower. As a result, the effectiveness of the cooling channels is further increased. The pressure conditions at the front-side inlets of the respective cooling channels arising from a fan must be considered when designing a suitable filling factor distribution.

Weitere vorteilhafte Ausgestaltungsmöglichkeiten sind den weiteren abhängigen Ansprüchen zu entnehmen.Further advantageous embodiment possibilities can be found in the further dependent claims.

Anhand der in den Zeichnungen dargestellten Ausführungsbeispiele sollen die Erfindung, weitere Ausführungsformen und weitere Vorteile näher beschrieben werden.Reference to the embodiments illustrated in the drawings, the invention, further embodiments and other advantages will be described in detail.

Es zeigen:

Fig. 1
eine exemplarische Trockentransformatorspule,
Fig. 2
einen exemplarischen Kernschenkel mit Trockentransformatorspule und
Fig. 3
einen exemplarischen Transformatorkern mit Trockentransformatorspulen.
Show it:
Fig. 1
an exemplary dry-type transformer coil,
Fig. 2
an exemplary core leg with dry transformer coil and
Fig. 3
an exemplary transformer core with dry transformer coils.

Figur 1 zeigt eine exemplarische Trockentransformatorspule 10 in einer Draufsicht auf eine derer beiden Stirnflächen. Um eine Mittelachse herum sind ineinander geschachtelt und zueinander beabstandet eine erste 12 und eine zweite 14 Wicklung der Trockentransformatorspule 10 angeordnet. In einem durch die Beabstandung gebildeten hohlzylindrischen Zwischenraum 16 sind in mehreren exemplarischen Abschnitten 18, 20, 22, 24, 26, 28 mehrere Beispiele für Anordnungen von Kühlkanälen 30, 32, 34, 36 mit jeweils unterschiedlichen Füllfaktoren gegeben. FIG. 1 shows an exemplary dry-type transformer coil 10 in a plan view of one of the two end faces. Around a central axis, a first 12 and a second 14 winding of the dry-type transformer coil 10 are nested in each other and spaced from one another. In a hollow-cylindrical intermediate space 16 formed by the spacing, a plurality of exemplary sections 18, 20, 22, 24, 26, 28 provide several examples of arrangements of cooling channels 30, 32, 34, 36, each with different filling factors.

Im ersten 18 und zweiten 20 Abschnitt sind Kühlkanäle 30 vorgesehen, welche im ersten Abschnitt 18 tangential beabstandet sind, womit sich ein geringerer Füllfaktor ergibt als im zweiten Abschnitt 20, wo die Kühlkanäle 30 tangential aneinandergrenzend sind. Im dritten Abschnitt 22 sind wiederum tangential aneinander grenzende Kühlkanäle 32 angeordnet, welche in ihrem Inneren jedoch ein jeweiliges Verengungselement 38 aufweisen, so dass auch im dritten Abschnitt ein reduzierter Füllfaktor gegeben ist.Cooling channels 30 are provided in the first 18 and second 20 sections, which are tangentially spaced in the first section 18, which results in a lower filling factor than in the second section 20, where the cooling channels 30 are tangent to one another. In the third section 22, in turn, tangentially adjoining cooling channels 32 are arranged, which, however, have a respective constriction element 38 in their interior, so that a reduced filling factor is also given in the third section.

Im vierten 24 und fünften 26 Abschnitt sind Kühlkanäle 34 mit geringerem Durchmesser als der der Kühlkanäle 30 und 32 angeordnet. Im vierten Abschnitt 24 sind diese einlagig tangential aneinandergrenzend und im fünften Abschnitt 26 zweilagig tangential aneinandergrenzend angeordnet, so dass der fünfte Abschnitt 26 einen etwa doppelt so hohen Füllfaktor aufweist wie der vierte Abschnitt 24.Cooling channels 34 of smaller diameter than the cooling channels 30 and 32 are arranged in the fourth 24 and fifth 26 sections. In the fourth section 24, these are arranged tangentially adjacent one another in a single layer and tangentially adjacent to each other in the fifth section 26 so that the fifth section 26 has an approximately twice the filling factor as the fourth section 24.

Im sechsten Abschnitt 28 wiederum sind tangential angeordnete Leistenelemente vorgesehen zur Beabstandung vorgesehen, durch deren Dicke letztendlich der Füllfaktor im sechsten Abschnitt 28 bestimmt ist.In the sixth section 28, in turn, tangentially arranged strip elements are provided for spacing, by the thickness of which the filling factor in the sixth section 28 is ultimately determined.

Figur 2 zeigt einen exemplarischen Kernschenkel 42 mit Trockentransformatorspule in einer Abbildung 40. Der Kernschenkel 42 ist längs einer Rotationsachse 44 ausgerichtet, um welche radialsymmetrisch angeordnet eine erste 46 und eine zweite 48 Wicklung der Transformatorspule angeordnet sind. In einem hohlzylindrischen Zwischenraum zwischen radial beabstandeter erster 46 und zweiter 48 Wicklung ist ein Kühlkanal 50 gebildet, an dessen oberen Ende ein Verengungselement 50 eingesetzt ist. Hierdurch wird der Strömungswiderstand durch den Kühlkanal 50 künstlich erhöht, womit der effektiv wirksame Füllfaktor für diesen Bereich des hohlzylindrischen Zwischenraumes reduziert ist. Kühlluft tritt von der unteren Stirnseite in den Kühlkanal 50 ein und an dessen oberen stirnseitigen Ende wieder aus, wie mit den Pfeilen mit der Bezugsziffer 54 und 56 angedeutet. FIG. 2 FIG. 4 shows an exemplary core leg 42 with a dry-type transformer coil in a diagram 40. The core leg 42 is aligned along a rotation axis 44, about which radially symmetrically arranged first 46 and second 48 windings of the transformer coil are arranged. In a hollow cylindrical space between radially spaced first 46 and second 48 winding a cooling channel 50 is formed at the upper end of a constriction element 50 is inserted. As a result, the flow resistance through the cooling channel 50 is artificially increased, whereby the effective effective filling factor for this area of the hollow cylindrical Space is reduced. Cooling air enters from the lower end face in the cooling channel 50 and at its upper end face again out, as indicated by the arrows with the reference numeral 54 and 56.

Die Fig. 3 zeigt einen exemplarischen Transformatorkern mit darauf angeordneten Trockentransformatorspulen 62, 64, 66 in einer Draufsicht 60. Der Transformatorkern weist drei Schenkel auf, welche an ihren beiden jeweiligen Enden mit einem quer dazu verlaufendem Joch 70 verbunden sind. Jeweilige Kühlkanäle sind in jeweiligen hohlzylindrischen Zwischenräumen 68 der Trockentransformatorspulen 62, 64, 66 gebildet. Das obere 70 und das untere Joch sind in einem Abstand zu den jeweiligen axialen Stirnflächen der Trockentransformatorspulen 62, 64, 66 angeordnet, so dass ein Luftstrom in den abgeschatteten Bereichen 72, 74, 76, 78 nicht ungehindert in die Kühlkanäle eintreten kann. Die hierdurch gebildete Verengungsstelle wird erfindungsgemäß durch einen erhöhten Füllfaktor in den entsprechenden Bereichen des hohlzylindrischen Zwischenraumes kompensiert, so dass sich für die alle Kühlkanäle unter der Berücksichtigung einer jeweiligen Abschattung ein etwa gleicher Strömungswiderstand ergibt.The Fig. 3 shows an exemplary transformer core with arranged thereon dry-transformer coils 62, 64, 66 in a plan view 60. The transformer core has three legs, which are connected at its two respective ends with a transverse thereto extending yoke 70. Respective cooling channels are formed in respective hollow cylindrical spaces 68 of the dry-type transformer coils 62, 64, 66. The upper 70 and lower yokes are spaced from the respective axial end faces of the dry-transformer coils 62, 64, 66 so that airflow in the shadowed areas 72, 74, 76, 78 can not enter the cooling passages unhindered. The constriction point thus formed is compensated according to the invention by an increased fill factor in the corresponding areas of the hollow cylindrical space, so that there is an approximately equal flow resistance for the all cooling channels taking into account a respective shading.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
exemplarische Trockentransformatorspuleexemplary dry-type transformer coil
1212
erste Wicklung von Trockentransformatorspulefirst winding of dry transformer coil
1414
zweite Wicklung von Trockentransformatorspulesecond winding of dry transformer coil
1616
hohlzylindrischer Zwischenraumhollow cylindrical space
1818
erster Abschnitt von hohlzylindrischem Zwischenraumfirst section of hollow cylindrical space
2020
zweiter Abschnitt von hohlzylindrischem Zwischenraumsecond section of hollow cylindrical space
2222
dritter Abschnitt von hohlzylindrischem Zwischenraumthird section of hollow cylindrical space
2424
vierter Abschnitt von hohlzylindrischem Zwischenraumfourth section of hollow cylindrical space
2626
fünfter Abschnitt von hohlzylindrischem Zwischenraumfifth section of hollow cylindrical space
2828
sechster Abschnitt von hohlzylindrischem Zwischenraumsixth section of hollow cylindrical space
3030
erster Kühlkanal in hohlzylindrischem Zwischenraumfirst cooling channel in hollow cylindrical space
3232
zweiter Kühlkanal in hohlzylindrischem Zwischenraumsecond cooling channel in hollow cylindrical space
3434
dritter Kühlkanal in hohlzylindrischem Zwischenraumthird cooling channel in hollow cylindrical space
3636
vierter Kühlkanal in hohlzylindrischem Zwischenraumfourth cooling channel in hollow cylindrical space
3838
exemplarisches Verengungselementexemplary constricting element
4040
exemplarischer Kernschenkel mit TrockentransformatorspuleExemplary core leg with dry transformer coil
4242
Kernschenkelcore leg
4444
Mittelachsecentral axis
4646
erste Wicklung von Trockentransformatorspulefirst winding of dry transformer coil
4848
zweite Wicklung von Trockentransformatorspulesecond winding of dry transformer coil
5050
Kühlkanalcooling channel
5252
exemplarisches Verengungselementexemplary constricting element
5454
einströmende Luftincoming air
5656
ausströmende Luftoutgoing air
6060
exemplarischer Transformatorkern mit Trockentransformatorspulenexemplary transformer core with dry transformer coils
6262
erste Trockentransformatorspulefirst dry-transformer coil
6464
erste Trockentransformatorspulefirst dry-transformer coil
6666
erste Trockentransformatorspulefirst dry-transformer coil
6868
holzylindrischer Zwischenraum von erster Trockentransformatorspulewooden cylindrical space of first dry transformer coil
7070
Kernjochcore yoke
7272
erster abgeschatteter Bereichfirst shaded area
7474
erster abgeschatteter Bereichfirst shaded area
7676
erster abgeschatteter Bereichfirst shaded area
7878
erster abgeschatteter Bereichfirst shaded area

Claims (8)

Trockentransformatorspule (10, 62, 64, 66), umfassend wenigstens zwei hohlzylindrische, ineinander verschachtelte und radial beabstandete Wicklungen (12, 14, 46, 48) beziehungsweise Wicklungsteile, wobei in dem durch die Beabstandung gebildeten hohlzylindrischen Zwischenraum (16, 68) axial verlaufende Kühlkanäle (30, 32, 34, 36, 50) angeordnet sind,
dadurch gekennzeichnet,
dass der Füllfaktor des hohlzylindrischen Zwischenraumes (16, 68) mit Kühlkanälen (30, 32, 34, 36, 50) über dessen radialen Umfang variiert.A dry-type transformer coil (10, 62, 64, 66) comprising at least two hollow cylindrical interleaved and radially spaced coils (12, 14, 46, 48) and winding members, respectively, wherein axially extending in the hollow cylindrical space (16, 68) formed by the spacing Cooling channels (30, 32, 34, 36, 50) are arranged,
characterized,
that the filling factor of the hollow cylindrical space (16, 68) with cooling channels (30, 32, 34, 36, 50) varies over its radial circumference. Trockentransformatorspule nach Anspruch 1, dadurch gekennzeichnet, dass die Variation des Füllfaktors durch eine zumindest bereichsweise erfolgende Verengung wenigstens eines axialen Teilbereiches von wenigstens einem Kühlkanal (30, 32, 34, 36, 50) bewirkt ist.Dry transformer coil according to claim 1, characterized in that the variation of the filling factor is effected by an at least partially constriction of at least one axial portion of at least one cooling channel (30, 32, 34, 36, 50). Trockentransformatorspule nach Anspruch 2, dadurch gekennzeichnet, dass eine jeweilige Verengung eines Kühlkanals (30, 32, 34, 36, 50) durch ein darin oder davor angeordnetes Verengungselement (38, 52) erfolgt.A dry-type transformer coil according to claim 2, characterized in that a respective constriction of a cooling channel (30, 32, 34, 36, 50) takes place through a constriction element (38, 52) arranged therein or in front of it. Trockentransformatorspule nach Anspruch 3, dadurch gekennzeichnet, dass ein jeweiliges Verengungselement (38, 52) aus einem Isolationsmaterial gefertigt ist.Dry transformer coil according to claim 3, characterized in that a respective constriction element (38, 52) is made of an insulating material. Trockentransformatorspule nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Verengungselement (38, 52) aus mehreren Modulen mit unterschiedlichem Temperaturausdehnungskoeffizient gefertigt ist.Dry transformer coil according to one of the preceding claims, characterized in that at least one constriction element (38, 52) is made of several modules with different coefficients of thermal expansion. Trockentransformatorspule nach Anspruch 5, dadurch gekennzeichnet, dass das wenigstens eine Verengungselement (38, 52) derart ausgestaltet und angeordnet ist, dass bei steigender Temperatur der Strömungswiderstand durch den jeweiligen Kühlkanal (30, 32, 34, 36, 50) reduziert wird.Dry transformer coil according to claim 5, characterized in that the at least one constriction element (38, 52) is configured and arranged in such a way that, as the temperature rises, the flow resistance through the respective cooling channel (30, 32, 34, 36, 50) is reduced. Trockentransformator (60), umfassend einen Transformatorkern mit wenigstens zwei Kernjochen (70) und mit wenigstens zwei Kernschenkeln (42), wobei um wenigstens einen Kernschenkel (42) eine Trockentransformatorspule (10, 62, 64, 66) nach einem der Ansprüche 1 bis 6 angeordnet ist,
dadurch gekennzeichnet,
dass der Füllfaktor des hohlzylindrischen Zwischenraums (16, 68) derart variiert ist, dass er in von den Kernjochen (70) stirnseitig abgeschatteten Bereichen (72, 74, 76, 78) höher ist als in den nicht abgeschatteten Bereichen.A dry type transformer (60) comprising a transformer core having at least two core yokes (70) and at least two core legs (42), wherein a dry transformer coil (10, 62, 64, 66) according to any one of claims 1 to 6 is formed around at least one core leg (42) is arranged
characterized,
in that the fill factor of the hollow cylindrical space (16, 68) is varied such that it is higher in areas (72, 74, 76, 78) which are shadowed by the core yokes (70) than in the areas which are not shaded. Trockentransformator nach Anspruch 7, dadurch gekennzeichnet, dass dieser ein Fördermittel für Kühlluft aufweist.Drying transformer according to claim 7, characterized in that it has a conveying means for cooling air.
EP13003609.8A 2013-07-17 2013-07-17 Dry type transformer Active EP2827346B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES13003609.8T ES2616270T3 (en) 2013-07-17 2013-07-17 Dry transformer
EP13003609.8A EP2827346B1 (en) 2013-07-17 2013-07-17 Dry type transformer
PCT/EP2014/061708 WO2015007432A1 (en) 2013-07-17 2014-06-05 Dry-type transformer coil and dry-type transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13003609.8A EP2827346B1 (en) 2013-07-17 2013-07-17 Dry type transformer

Publications (2)

Publication Number Publication Date
EP2827346A1 true EP2827346A1 (en) 2015-01-21
EP2827346B1 EP2827346B1 (en) 2016-11-16

Family

ID=48832736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13003609.8A Active EP2827346B1 (en) 2013-07-17 2013-07-17 Dry type transformer

Country Status (3)

Country Link
EP (1) EP2827346B1 (en)
ES (1) ES2616270T3 (en)
WO (1) WO2015007432A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018208363A1 (en) * 2018-05-28 2019-11-28 Robert Bosch Gmbh Coil arrangement for an electrical machine for a motor vehicle, electric machine and method for producing such a coil arrangement
WO2021081977A1 (en) 2019-11-01 2021-05-06 Abb Power Grids Switzerland Ag Insulation assembly, transformer assembly, and dry type transformer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6368530B1 (en) * 1999-12-16 2002-04-09 Square D Company Method of forming cooling ducts in cast resin coils
EP1715495A2 (en) * 2005-04-21 2006-10-25 TMC Italia S.p.A. Resin-insulated dry transformer
CN202189656U (en) * 2011-08-11 2012-04-11 天津市特变电工变压器有限公司 Foil winding coil adopting hollow air flue strips
EP2439755A1 (en) * 2010-10-08 2012-04-11 ABB Technology AG Dry-type electrical transformer
EP2472533A1 (en) * 2011-01-04 2012-07-04 ABB Technology AG Transformer coil with cooling channel
CN202473553U (en) * 2012-02-29 2012-10-03 山东威特变压器厂 Dry type transformer
EP2549495A1 (en) * 2011-07-18 2013-01-23 ABB Technology AG Dry type transformer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2793244B1 (en) * 2013-04-17 2015-07-08 ABB Technology AG Dry transformer coil and dry transformer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6368530B1 (en) * 1999-12-16 2002-04-09 Square D Company Method of forming cooling ducts in cast resin coils
EP1715495A2 (en) * 2005-04-21 2006-10-25 TMC Italia S.p.A. Resin-insulated dry transformer
EP2439755A1 (en) * 2010-10-08 2012-04-11 ABB Technology AG Dry-type electrical transformer
EP2472533A1 (en) * 2011-01-04 2012-07-04 ABB Technology AG Transformer coil with cooling channel
EP2549495A1 (en) * 2011-07-18 2013-01-23 ABB Technology AG Dry type transformer
CN202189656U (en) * 2011-08-11 2012-04-11 天津市特变电工变压器有限公司 Foil winding coil adopting hollow air flue strips
CN202473553U (en) * 2012-02-29 2012-10-03 山东威特变压器厂 Dry type transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018208363A1 (en) * 2018-05-28 2019-11-28 Robert Bosch Gmbh Coil arrangement for an electrical machine for a motor vehicle, electric machine and method for producing such a coil arrangement
WO2021081977A1 (en) 2019-11-01 2021-05-06 Abb Power Grids Switzerland Ag Insulation assembly, transformer assembly, and dry type transformer
EP4052276A4 (en) * 2019-11-01 2023-07-26 Hitachi Energy Switzerland AG Insulation assembly, transformer assembly, and dry type transformer

Also Published As

Publication number Publication date
EP2827346B1 (en) 2016-11-16
ES2616270T3 (en) 2017-06-12
WO2015007432A1 (en) 2015-01-22

Similar Documents

Publication Publication Date Title
EP2428967B1 (en) Transformer coil
DE102018127558A1 (en) Electric machine with stator windings of different cross section
WO2015062838A1 (en) Dry-type transformer coil and dry-type transformer
EP2793244B1 (en) Dry transformer coil and dry transformer
EP2472533A1 (en) Transformer coil with cooling channel
EP2827346B1 (en) Dry type transformer
DE102007014360A1 (en) Spacers for windings
DE102012014101A1 (en) Heat exchanger for indirect heat transfer between primary and secondary mediums, has flow interrupter that is provided for influencing pressure loss in casing space between tube sheets
EP2866235B1 (en) High voltage transformer
WO2010130337A2 (en) Method for producing a disk winding
EP2863402A1 (en) Strip winding for high voltage transformers
EP2533257B1 (en) Transformer coil
EP0805541A1 (en) Gas cooled winding head for electrical machine
DE2836283C2 (en) Electrical device winding
EP0014418B1 (en) Coil for an air-cooled dry-type transformer
WO2012028222A1 (en) Cooled transformer having at least one strip winding
CH214701A (en) Transformer with concentric windings.
WO2010049041A1 (en) Transformer
DE1538977C3 (en)
AT275652B (en) Winding arrangement for a high voltage transformer and method for its manufacture
EP2800109B1 (en) Polygonal transformer core and transformer with polygonal transformer core
DE1244945B (en) Winding for transformers and choke coils made up of disc coils with the same number of turns continuously connected to form double coils, between which there are radial oil ducts
DE102018202245A1 (en) Electrical device with leg-encapsulated winding and air-cooled core
CH409106A (en) Dynamo-electric machine
CH279739A (en) Winding for transformers and electrical machines.

Legal Events

Date Code Title Description
17P Request for examination filed

Effective date: 20130717

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

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

Free format text: ORIGINAL CODE: 0009012

R17P Request for examination filed (corrected)

Effective date: 20150303

17Q First examination report despatched

Effective date: 20150330

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160616

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ABB SCHWEIZ AG

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 846598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502013005353

Country of ref document: DE

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

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20161116

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170216

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170217

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

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

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170316

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2616270

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20170612

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

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502013005353

Country of ref document: DE

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

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170216

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20170817

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

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180330

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

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170717

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20170731

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

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170717

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

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170731

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

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

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

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20130717

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 846598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180717

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

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

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

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

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

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180717

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

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

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161116

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170316

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: HITACHI ENERGY SWITZERLAND AG, CH

Free format text: FORMER OWNER: ABB SCHWEIZ AG, BADEN, CH

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: HITACHI ENERGY LTD, CH

Free format text: FORMER OWNER: ABB SCHWEIZ AG, BADEN, CH

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: ABB POWER GRIDS SWITZERLAND AG, CH

Free format text: FORMER OWNER: ABB SCHWEIZ AG, BADEN, CH

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: ABB POWER GRIDS SWITZERLAND AG

Effective date: 20210520

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20211104 AND 20211110

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: HITACHI ENERGY SWITZERLAND AG

Effective date: 20220526

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: HITACHI ENERGY SWITZERLAND AG, CH

Free format text: FORMER OWNER: ABB POWER GRIDS SWITZERLAND AG, BADEN, CH

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: HITACHI ENERGY LTD, CH

Free format text: FORMER OWNER: ABB POWER GRIDS SWITZERLAND AG, BADEN, CH

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230527

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502013005353

Country of ref document: DE

Representative=s name: DENNEMEYER & ASSOCIATES S.A., DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502013005353

Country of ref document: DE

Owner name: HITACHI ENERGY LTD, CH

Free format text: FORMER OWNER: HITACHI ENERGY SWITZERLAND AG, BADEN, CH

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20240718 AND 20240724

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: HITACHI ENERGY LTD

Effective date: 20240925

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

Ref country code: DE

Payment date: 20240719

Year of fee payment: 12

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

Ref country code: GB

Payment date: 20240725

Year of fee payment: 12

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

Ref country code: ES

Payment date: 20240828

Year of fee payment: 12

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

Ref country code: IT

Payment date: 20240725

Year of fee payment: 12