WO2013020859A1 - Winding and method for producing a winding with a cooling channel - Google Patents

Winding and method for producing a winding with a cooling channel Download PDF

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Publication number
WO2013020859A1
WO2013020859A1 PCT/EP2012/064958 EP2012064958W WO2013020859A1 WO 2013020859 A1 WO2013020859 A1 WO 2013020859A1 EP 2012064958 W EP2012064958 W EP 2012064958W WO 2013020859 A1 WO2013020859 A1 WO 2013020859A1
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WO
WIPO (PCT)
Prior art keywords
winding
tubes
producing
layers
cooling channel
Prior art date
Application number
PCT/EP2012/064958
Other languages
German (de)
French (fr)
Inventor
Rudolf Hanov
Matthias Müller
Original Assignee
Siemens Aktiengesellschaft
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Publication of WO2013020859A1 publication Critical patent/WO2013020859A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—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
    • H01F27/2876—Cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • 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
    • H01F27/10—Liquid cooling

Definitions

  • the invention relates to a winding according to the preamble of patent claim 8 and a method for producing a winding for an electrical component, in particular a transformer according to the preamble of patent claim 1.
  • Windings are often used as transformer coils.
  • a conductive foil of, for example, copper or aluminum is alternately wound with an insulating film or an insulated wire with an electrically conductive core on a usually circular winding body or a winding template in layers.
  • a synthetic resin such as an epoxy resin
  • the casting resin is solidified.
  • a coil thus produced is good ge ⁇ protects against environmental influences such as dust or moisture.
  • the casting resin is a relatively poor conductor of heat. In order to ensure a good heat dissipation also from the inside of the molded winding, cooling channels can serve.
  • a transformer with a winding is known in which elliptical tubes are inserted between the individual layers during the winding process of the winding at a distance from each other, which form cooling channels after casting with cast resin.
  • the present invention is based on the object of specifying a method for producing a winding provided with cooling channels, which is particularly simple and inexpensive to implement.
  • the object of the invention is a winding for an electrical construction. Specify part whose locations show the smallest possible deviation from the desired shape.
  • the invention provides a method for producing a winding in which a band or wire-shaped conductor material is wound around a longitudinal axis in a plurality of layers and between two layers parallel to the longitudinal axis extending tubes are wrapped.
  • the woundauermate ⁇ rial and the wrapped tubes are cast with a synthetic resin and cured the resin.
  • treadmill is intended that at least two adjacent parallel, forming a cooling channel, pipes prior to wrapping with ⁇ are movably connected to each other.
  • Such a cooling channel is easy to produce by connecting two or more simple tubes, for example, with ribbons together.
  • Such a cooling channel can be easily inserted between the individual layers during winding of the winding and wound up with. Due to the mutually movable pipes, this cooling channel fits snugly against the different, from inside to outside, larger winding radii. As a result, the smallest possible deviation of the winding from the desired shape is achieved.
  • multiple pipes can easily be connected together in locations with higher cooling requirements, thus providing a larger volume of coolant.
  • the cooling channels can be provided as nanowi ⁇ ckelte mat many connected pipes and each cut to the appropriate number of interconnected pipes and wrapped in the winding.
  • the cooling channels can also be prepared as pre-assembled as two, three, four or more interconnected pipes and then only have to be inserted when winding the winding between the layers.
  • the tubes are fixed relative to one another with respect to a displacement in the longitudinal direction. This ensures that the ends of the tubes have a uniform distance from the end face of the winding and can not move against each other in the longitudinal direction, which greatly simplifies the wrapping in the individual layers.
  • adjacent tubes in each case may also be fixed in relation to their radial distance. Since ⁇ is given by a uniform spacing of the tubes and thus a uniform distribution of the cooling effect, which has an advantageous effect on the heat distribution in the winding.
  • the adjacent pipes can be verbun ⁇ through we ⁇ iquess a separate connecting element to each other. A connecting element thus always connects exactly two adjacent tubes. A particularly high Fle ⁇ bility of the connection is ensured.
  • a the tubes at least partially encircling band can be especially beneficial as a connecting element used ⁇ the.
  • the band can be attached to both tubes.
  • the tubes are simultaneously fixed in the longitudinal direction against each other. This connection is particularly easy to manufacture and is particularly flexible.
  • the tubes are made of an electrically insulating, mechanically stable material.
  • Mechanically stable means, in particular, that the tubes are so stable that they do not collapse during casting due to the static pressure of the casting compound. As a result, the electrical insulation between the layers of the winding is ensured, and a compression and thus a diameter reduction of the tubes during wrapping is avoided.
  • connecting elements made of an electrically insulating material and at least partially made of a fiber-reinforced, in particular a glass fiber reinforced plastic. This configuration advantageously ensures the insulation between the layers of the winding and achieves a high mechanical stability of the connection.
  • the winding is cast with an elekt ⁇ driven insulating plastic, in particular a synthetic resin. Often an epoxy resin is used for this purpose. As a result, the winding is particularly well protected against environmental influences.
  • the pipes are surrounded with.
  • the tubes of the cooling ⁇ channels can be closed before the casting at their ends so that no synthetic resin can penetrate into the tubes, this closure is removed after potting, so that the tubes provide through holes in the insulating plastic.
  • a particularly advantageous embodiment consists in that the tubes consist of a material that is electrically and thermally compatible with the electrically insulating plastic.
  • Electrically compatible herein means in particular that the di ⁇ electrical properties, in particular the dielectric constant of insulating plastic tubes and have similar values.
  • Thermally compatible means that insbesonde ⁇ re are the thermal expansion coefficients of the materials of insulating plastic and tubes so close together that temperature changes do not result in cracks between these materials.
  • a winding for an electrical component in particular a Transforma ⁇ gate, at least one wound in several layers about a longitudinal axis band or wire-shaped conductor material with we ⁇ least one parallel to Longitudinal axis between two of these layers extending cooling channel.
  • the at least one cooling channel has a plurality of parallel running, adjacent tubes, which conform to the respective radia ⁇ len course of the successive layers.
  • FIG. 2 shows a detail enlargement from FIG. 1 with winding layers shown visibly
  • FIG. 3 shows a cooling channel with four interconnected
  • FIG. 4 shows a cooling channel with two interconnected
  • FIG. 1 can be seen a winding 1 prepared by the inventive method already in with a casting resin ⁇ 20-cast.
  • the winding 1 here forms a circular hollow cylinder, alternatively, an oval shape would be possible, at the end faces of the openings of wrapped at the ends of the cooling channels 10, 11 are visible.
  • the cooling channels 10, 11 run parallel to a
  • FIG. 1 shows the detail A of the figure 1 in an enlarged view. Here, individual layers 32 of the winding 1 are shown visibly, although they would actually be covered by the casting resin 20.
  • the layers 32 each consist of a strip-shaped conductive material 30, such as a foil of an electrically conductive material such as copper or aluminum, and a band-shaped, electrically insulating insulation 31, instead of the band-shaped conductor material 30 could ⁇ te also a wire-shaped, with an insulating layer used, conductive material can be used.
  • a reinforcing layer not shown here can be wound as a further layer of the sheet with a ⁇ about from a fiber-reinforced plastic.
  • the first of the layers 32 is aufk- aufk- on a winding core, not shown here, usually a circular hollow cylinder adoptedwi-. Thereupon further layers 32 can either be wound directly on one another or at a distance. After one or more layers 32 wound in this way, a cooling channel 10 made of two tubes 40 movably connected to one another is inserted. At regular intervals, further cooling channels 10, 11 follow. The number of tubes in the cooling channels may vary, depending on the requirement for cooling.
  • FIGS. 3 and 4 such a cooling channel 12 or 10 is shown in each case.
  • the cooling channel 12 consists of four
  • the cooling channel 10 consists of two tubes 40 connected to one another.
  • the tubes 40 are connected to one another by band-like connecting elements 41, 42.
  • a connecting member 42 connects all four tubes 40 which is alternately performed with respect to the front and back on the on ⁇ view of Figure 3.
  • a second connecting element 41 as well, only on the other side of the tube 40, so that the tubes 40 are connected to each other in a mat-like manner by the connecting elements 41, 42.
  • you can too more or fewer than four tubes 40 are connected together in this way.
  • two tubes 40 are connected to one another by two connecting elements 41.
  • the connecting elements 41 are placed around the same tube side of the two tubes 40.
  • the connecting element 41 can also be continued on the rear side of the tubes 40 or a second connecting element can be mounted on the rear side of the tubes 40.
  • Cooling channel made of three tubes

Abstract

The invention relates to a winding (1) and to a method for producing a winding (1). Tubes (40) running parallel to the longitudinal axis (13) are introduced between two layers (32) of a strip-shaped or wire-shaped conductor material (30), which is wound up about a longitudinal axis, and the winding (1) is cast with a synthetic resin (20). The inserted tubes (40) thus form cooling channels. The invention provides for at least two tubes (40), which run parallel next to one another and form a cooling channel (10, 11, 12), to be connected to one another movably prior to the application of the winding. The cooling channels (10, 11, 12) to which the winding is to be applied are thus matched optimally to the respective radius of the surrounding layers (32).

Description

Beschreibung description
Wicklung und Verfahren zur Herstellung einer Wicklung mit Kühlkanal Winding and method for producing a winding with a cooling channel
Die Erfindung betrifft eine Wicklung nach dem Oberbegriff des Patentanspruchs 8 und ein Verfahren zur Herstellung einer Wicklung für ein elektrisches Bauteil, insbesondere einen Transformator gemäß dem Oberbegriff des Patentanspruchs 1. The invention relates to a winding according to the preamble of patent claim 8 and a method for producing a winding for an electrical component, in particular a transformer according to the preamble of patent claim 1.
Wicklungen werden häufig als Transformatorspulen eingesetzt. Dazu wird eine leitende Folie aus beispielsweise Kupfer oder Aluminium abwechselnd mit einer isolierenden Folie oder ein isolierter Draht mit einem elektrisch leitenden Kern auf ei- nen meist kreisrunden Wickelkörper oder eine Wickelschablone in Lagen aufgewickelt. Nach dem Aufwickeln wird diese Wicklung in eine Form gefasst und dann beispielsweise in einem Vakuumofen zunächst evakuiert und dann mit einem Kunstharz, beispielsweise einem Epoxydharz, vergossen. In einem herkömm- liehen und im Stand der Technik bekannten Aushärteprozess wird das Gießharz verfestigt. Eine so hergestellte Wicklung ist gut gegen Umwelteinflüsse wie Staub oder Feuchtigkeit ge¬ schützt. Allerdings ist das Gießharz ein relativ schlechter Wärmeleiter. Um eine gute Wärmeabfuhr auch aus dem Inneren der vergossenen Wicklung zu gewährleisten, können Kühlkanäle dienen . Windings are often used as transformer coils. For this purpose, a conductive foil of, for example, copper or aluminum is alternately wound with an insulating film or an insulated wire with an electrically conductive core on a usually circular winding body or a winding template in layers. After winding this winding is taken in a mold and then evacuated, for example in a vacuum oven first and then with a synthetic resin, such as an epoxy resin, cast. In a conventional borrowing and known in the art hardening process, the casting resin is solidified. A coil thus produced is good ge ¬ protects against environmental influences such as dust or moisture. However, the casting resin is a relatively poor conductor of heat. In order to ensure a good heat dissipation also from the inside of the molded winding, cooling channels can serve.
Aus der DE 602 09574 T2 ist ein Transformator mit einer Wicklung bekannt, bei dem während des Wickelvorganges der Wick- lung in Abstand voneinander elliptische Rohre zwischen die einzelnen Lagen eingelegt werden, die nach dem Verguss mit Gießharz Kühlkanäle bilden. From DE 602 09574 T2, a transformer with a winding is known in which elliptical tubes are inserted between the individual layers during the winding process of the winding at a distance from each other, which form cooling channels after casting with cast resin.
Der vorliegenden Erfindung liegt einerseits die Aufgabe zugrunde, ein Verfahren zur Herstellung einer mit Kühlkanälen versehenen Wicklung anzugeben, das besonders einfach und kostengünstig auszuführen ist. Andererseits liegt der Erfindung die Aufgabe zugrunde eine Wicklung für ein elektrisches Bau- teil anzugeben, deren Lagen eine möglichst geringe Abweichung von der gewünschten Form zeigen. On the one hand, the present invention is based on the object of specifying a method for producing a winding provided with cooling channels, which is particularly simple and inexpensive to implement. On the other hand, the object of the invention is a winding for an electrical construction. Specify part whose locations show the smallest possible deviation from the desired shape.
Die Aufgabe wird mit den Mitteln der Erfindung gemäß Patent- anspruch 8 gelöst. Der verfahrensbezogene Aufgabenteil wird gelöst durch ein Verfahren gemäß Patentanspruch 1. The object is achieved with the means of the invention according to patent claim 8. The procedural task part is achieved by a method according to claim 1.
Dabei sieht die Erfindung ein Verfahren zur Herstellung einer Wicklung vor, bei dem ein band- oder drahtförmiges Leiterma- terial um eine Längsachse in mehreren Lagen aufgewickelt wird und zwischen zwei Lagen parallel zur Längsachse verlaufende Rohre mit eingewickelt werden. Das aufgewickelte Leitermate¬ rial und die eingewickelten Rohre werden mit einem Kunstharz vergossen und das Kunstharz ausgehärtet. Weiterhin ist vorge- sehen, dass wenigstens zwei parallel nebeneinander verlaufende, einen Kühlkanal bildende, Rohre vor dem Einwickeln mit¬ einander beweglich verbunden werden. The invention provides a method for producing a winding in which a band or wire-shaped conductor material is wound around a longitudinal axis in a plurality of layers and between two layers parallel to the longitudinal axis extending tubes are wrapped. The wound Leitermate ¬ rial and the wrapped tubes are cast with a synthetic resin and cured the resin. Furthermore, treadmill is intended that at least two adjacent parallel, forming a cooling channel, pipes prior to wrapping with ¬ are movably connected to each other.
Ein solcher Kühlkanal ist leicht herstellbar, indem zwei oder mehrere einfache Rohre beispielsweise mit Bändern miteinander verbunden werden. Ein solcher Kühlkanal kann beim Aufwickeln der Wicklung einfach zwischen die einzelnen Lagen eingelegt und mit aufgewickelt werden. Durch die zueinander beweglichen Rohre schmiegt sich dieser Kühlkanal gut an die unterschied- liehen, von Innen nach Außen größer werdenden Wickelradien an. Dadurch wird eine möglichst geringe Abweichung der Wicklung von der gewünschten Form erreicht. Außerdem können an Stellen mit höherem Kühlungsbedarf leicht mehrere Rohre miteinander verbunden werden und so ein größeres Volumen für Kühlmittel bereitstellen. Die Kühlkanäle können als aufgewi¬ ckelte Matte vieler miteinander verbundener Rohre bereitgestellt werden und jeweils die passende Anzahl an miteinander verbundenen Rohren abgelängt und in die Wicklung eingewickelt werden. Die Kühlkanäle können auch vorkonfektioniert als zwei, drei, vier oder mehr miteinander verbundenen Rohren bereitgestellt werden und müssen dann nur noch beim Aufwickeln der Wicklung zwischen die Lagen eingelegt werden. In einer weiteren vorteilhaften Ausgestaltung werden die Rohre relativ zueinander bezüglich einer Verschiebung in Längsrichtung fixiert. Dadurch ist gewährleistet, dass die Enden der Rohre einen gleichmäßigen Abstand zur Stirnseite der Wicklung haben und sich nicht gegeneinander in Längsrichtung verschieben können, was das Einwickeln in die einzelnen Lagen erheblich vereinfacht. Such a cooling channel is easy to produce by connecting two or more simple tubes, for example, with ribbons together. Such a cooling channel can be easily inserted between the individual layers during winding of the winding and wound up with. Due to the mutually movable pipes, this cooling channel fits snugly against the different, from inside to outside, larger winding radii. As a result, the smallest possible deviation of the winding from the desired shape is achieved. In addition, multiple pipes can easily be connected together in locations with higher cooling requirements, thus providing a larger volume of coolant. The cooling channels can be provided as aufgewi ¬ ckelte mat many connected pipes and each cut to the appropriate number of interconnected pipes and wrapped in the winding. The cooling channels can also be prepared as pre-assembled as two, three, four or more interconnected pipes and then only have to be inserted when winding the winding between the layers. In a further advantageous embodiment, the tubes are fixed relative to one another with respect to a displacement in the longitudinal direction. This ensures that the ends of the tubes have a uniform distance from the end face of the winding and can not move against each other in the longitudinal direction, which greatly simplifies the wrapping in the individual layers.
Es kann zudem vorteilhaft sein, dass jeweils benachbarte Roh- re in Bezug auf ihren radialen Abstand fixiert werden. Da¬ durch ist ein gleichmäßiger Abstand der Rohre gegeben und damit eine gleichmäßige Verteilung der Kühlwirkung, was sich vorteilhaft auf die Wärmeverteilung in der Wicklung auswirkt. Vorteilhaft können die jeweils benachbarten Rohre durch we¬ nigstens ein separates Verbindungselement miteinander verbun¬ den werden. Ein Verbindungselement verbindet so immer genau zwei benachbarte Rohre. Dadurch ist eine besonders hohe Fle¬ xibilität der Verbindung gewährleistet. It may also be advantageous for adjacent tubes in each case to be fixed in relation to their radial distance. Since ¬ is given by a uniform spacing of the tubes and thus a uniform distribution of the cooling effect, which has an advantageous effect on the heat distribution in the winding. Advantageously, the adjacent pipes can be verbun ¬ through we ¬ nigstens a separate connecting element to each other. A connecting element thus always connects exactly two adjacent tubes. A particularly high Fle ¬ bility of the connection is ensured.
Besonders vorteilhaft kann als Verbindungselement ein die Rohre zumindest teilweise umschlingendes Band verwendet wer¬ den. Das Band kann dabei an beiden Rohren befestigt sein. Dadurch werden die Rohre gleichzeitig in Längsrichtung gegen- einander fixiert. Diese Verbindung ist besonders einfach herzustellen und ist besonders flexibel. A the tubes at least partially encircling band can be especially beneficial as a connecting element used ¬ the. The band can be attached to both tubes. As a result, the tubes are simultaneously fixed in the longitudinal direction against each other. This connection is particularly easy to manufacture and is particularly flexible.
Vorteilhaft kann außerdem sein, dass die Rohre aus einem elektrisch isolierenden, mechanisch stabilen Material herge- stellt werden. Mechanisch stabil bedeutet insbesondere, dass die Rohre so stabil sind, dass sie beim Vergießen nicht durch den statischen Druck der Vergussmasse kollabieren. Dadurch ist die elektrische Isolation zwischen den Lagen der Wicklung gewährleistet, und ein Zusammendrücken und damit eine Durch- messerverkleinerung der Rohre beim Einwickeln wird vermieden. It can also be advantageous that the tubes are made of an electrically insulating, mechanically stable material. Mechanically stable means, in particular, that the tubes are so stable that they do not collapse during casting due to the static pressure of the casting compound. As a result, the electrical insulation between the layers of the winding is ensured, and a compression and thus a diameter reduction of the tubes during wrapping is avoided.
Es kann auch vorteilhaft sein, dass die Verbindungselemente aus einem elektrisch isolierenden Material und zumindest teilweise aus einem faserverstärkten, insbesondere einem glasfaserverstärkten Kunststoff bestehen. Durch diese Ausgestaltung wird vorteilhaft die Isolation zwischen den Lagen der Wicklung gewährleistet und eine hohe mechanische Stabilität der Verbindung erreicht. It may also be advantageous that the connecting elements made of an electrically insulating material and at least partially made of a fiber-reinforced, in particular a glass fiber reinforced plastic. This configuration advantageously ensures the insulation between the layers of the winding and achieves a high mechanical stability of the connection.
Besonders vorteilhaft ist, wenn die Wicklung mit einem elekt¬ risch isolierenden Kunststoff, insbesondere einem Kunstharz, vergossen wird. Häufig wird hierfür ein Epoxydharz verwendet. Dadurch ist die Wicklung besonders gut vor Umwelteinflüssen geschützt. Die Rohre werden mit umgössen. Die Rohre der Kühl¬ kanäle können vor dem Verguss an ihren Enden so verschlossen werden, dass kein Kunstharz in die Rohre eindringen kann, Dieser Verschluss wird nach dem Verguss entfernt, so dass die Rohre durchgehende Öffnungen in dem isolierenden Kunststoff bereitstellen . It is particularly advantageous if the winding is cast with an elekt ¬ driven insulating plastic, in particular a synthetic resin. Often an epoxy resin is used for this purpose. As a result, the winding is particularly well protected against environmental influences. The pipes are surrounded with. The tubes of the cooling ¬ channels can be closed before the casting at their ends so that no synthetic resin can penetrate into the tubes, this closure is removed after potting, so that the tubes provide through holes in the insulating plastic.
Eine besonders vorteilhafte Ausgestaltung besteht darin, dass die Rohre aus einem zu dem elektrisch isolierenden Kunststoff elektrisch und thermisch kompatiblen Material bestehen. A particularly advantageous embodiment consists in that the tubes consist of a material that is electrically and thermally compatible with the electrically insulating plastic.
Elektrisch kompatibel meint hier insbesondere dass die di¬ elektrischen Eigenschaften, insbesondere die Dielektrizitätskonstante von isolierendem Kunststoff und Rohren ähnliche Werte aufweisen. Thermisch kompatibel meint, dass insbesonde¬ re die thermischen Ausdehnungskoeffizienten der Materialien von isolierendem Kunststoff und Rohren so nahe beieinander liegen, dass Temperaturänderungen nicht zu Rissen zwischen diesen Materialien führen. Electrically compatible herein means in particular that the di ¬ electrical properties, in particular the dielectric constant of insulating plastic tubes and have similar values. Thermally compatible means that insbesonde ¬ re are the thermal expansion coefficients of the materials of insulating plastic and tubes so close together that temperature changes do not result in cracks between these materials.
Der vorrichtungsbezogene Aufgabenteil wird gelöst durch eine Wicklung nach Patentanspruch 8. Demnach weist eine Wicklung für ein elektrisches Bauteil, insbesondere einen Transforma¬ tor, wenigstens ein in mehreren Lagen um eine Längsachse auf- gewickeltes band- oder drahtförmiges Leitermaterial mit we¬ nigstens einem parallel zur Längsachse zwischen zwei dieser Lagen verlaufenden Kühlkanal auf. Erfindungsgemäß weist der wenigstens eine Kühlkanal mehrere parallel verlaufende, an- einander grenzende Rohre auf, die sich dem jeweiligen radia¬ len Verlauf der aufeinander folgenden Lagen anschmiegen. Dadurch wird eine möglichst geringe Abweichung der einzelnen Lagen von der gewünschten Form erreicht. The device-related task part is achieved by a winding according to claim 8. Accordingly, a winding for an electrical component, in particular a Transforma ¬ gate, at least one wound in several layers about a longitudinal axis band or wire-shaped conductor material with we ¬ least one parallel to Longitudinal axis between two of these layers extending cooling channel. According to the invention, the at least one cooling channel has a plurality of parallel running, adjacent tubes, which conform to the respective radia ¬ len course of the successive layers. As a result, the smallest possible deviation of the individual layers from the desired shape is achieved.
Im Folgenden wird die Erfindung anhand der Zeichnungen näher erläutert. Dabei zeigen: In the following the invention will be explained in more detail with reference to the drawings. Showing:
Figur 1 eine bereits vergossene Wicklung in perspektivischer Ansicht, 1 shows an already encapsulated winding in a perspective view,
Figur 2 eine Ausschnittvergrößerung aus Figur 1 mit sichtbar dargestellten Wicklungslagen, FIG. 2 shows a detail enlargement from FIG. 1 with winding layers shown visibly,
Figur 3 einen Kühlkanal mit vier miteinander verbundenen Figure 3 shows a cooling channel with four interconnected
Rohren,  pipes,
Figur 4 einen Kühlkanal mit zwei miteinander verbundenen Figure 4 shows a cooling channel with two interconnected
Rohren .  Pipes.
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen. Corresponding parts are provided in all figures with the same reference numerals.
In der Figur 1 erkennt man eine mit dem erfindungsgemäßen Verfahren hergestellte Wicklung 1 in bereits mit einem Gie߬ harz 20 vergossenen Zustand. Die Wicklung 1 bildet hier einen kreisförmigen Hohlzylinder, alternativ wäre auch eine ovale Form möglich, an dessen Stirnseiten die Öffnungen von eingewickelten an den Enden der Kühlkanäle 10, 11 sichtbar sind. Die Kühlkanäle 10, 11 verlaufen dabei parallel zu einer In the figure 1 can be seen a winding 1 prepared by the inventive method already in with a casting resin ¬ 20-cast. The winding 1 here forms a circular hollow cylinder, alternatively, an oval shape would be possible, at the end faces of the openings of wrapped at the ends of the cooling channels 10, 11 are visible. The cooling channels 10, 11 run parallel to a
Längsachse 13 der Wicklung 1. Durch die Kühlkanäle 10, 11 kann ein Kühlmedium wie Luft oder ein flüssiges Kühlmittel strömen und die Wärme aus dem Inneren der Wicklung 1 nach außen transportieren. Die Strömung des Kühlmediums kann hierbei durch Konvektion angetrieben oder durch Ventilatoren oder Pumpen unterstützt sein. Figur 2 zeigt die Einzelheit A aus der Figur 1 in vergrößerter Darstellung. Hier sind einzelne Lagen 32 der Wicklung 1 sichtbar dargestellt, obwohl sie eigentlich vom Gießharz 20 bedeckt wären. Die Lagen 32 bestehen aus jeweils einem band- förmigen Leitermaterial 30, beispielsweise einer Folie aus einem elektrisch leitfähigen Material wie Kupfer oder Aluminium, und einer bandförmigen, elektrisch isolierenden Isolierfolie 31. Statt des bandförmigen Leitermaterials 30 könn¬ te auch ein drahtförmiges , mit einer Isolierschicht versehe- nes, Leitermaterial eingesetzt werden. Statt der Isolierfolie 31 kann auch eine Isolationsschicht beispielsweise durch Be¬ schichten oder durch metallurgische Verfahren direkt auf das Leitermaterial 30 aufgebracht sein. Zusätzlich kann eine hier nicht dargestellte Verstärkungsschicht etwa aus einem faser- verstärkten Kunststoff als weitere Schicht der Lage mit ein¬ gewickelt werden. Longitudinal axis 13 of the winding 1. Through the cooling channels 10, 11 can flow a cooling medium such as air or a liquid coolant and transport the heat from the interior of the winding 1 to the outside. The flow of the cooling medium can be driven by convection or supported by fans or pumps. Figure 2 shows the detail A of the figure 1 in an enlarged view. Here, individual layers 32 of the winding 1 are shown visibly, although they would actually be covered by the casting resin 20. The layers 32 each consist of a strip-shaped conductive material 30, such as a foil of an electrically conductive material such as copper or aluminum, and a band-shaped, electrically insulating insulation 31, instead of the band-shaped conductor material 30 could ¬ te also a wire-shaped, with an insulating layer used, conductive material can be used. Instead of the insulating film 31 and an insulating layer may be applied for example by Be ¬ layers or by metallurgical processes directly on the conductor material 30th In addition, a reinforcing layer, not shown here can be wound as a further layer of the sheet with a ¬ about from a fiber-reinforced plastic.
Die erste der Lagen 32 ist auf einen hier nicht dargestellten Wicklungskern, meist ein kreisförmiger Hohlzylinder, aufgewi- ekelt. Darauf können weitere Lagen 32 entweder direkt aufeinander oder mit Abstand aufgewickelt sein. Nach einer oder mehreren so aufgewickelten Lagen 32 ist ein Kühlkanal 10 aus zwei miteinander beweglich verbundenen Rohren 40 eingelegt. In gleichmäßigen Abständen folgen weitere Kühlkanäle 10, 11. Die Anzahl der Rohre in den Kühlkanälen kann variieren, je nach Anforderung an den Kühlungsbedarf. The first of the layers 32 is aufk- aufk- on a winding core, not shown here, usually a circular hollow cylinder aufgewi-. Thereupon further layers 32 can either be wound directly on one another or at a distance. After one or more layers 32 wound in this way, a cooling channel 10 made of two tubes 40 movably connected to one another is inserted. At regular intervals, further cooling channels 10, 11 follow. The number of tubes in the cooling channels may vary, depending on the requirement for cooling.
In den Figuren 3 und 4 ist jeweils ein solcher Kühlkanal 12 bzw. 10 dargestellt. In Figur 3 besteht der Kühlkanal 12 aus vier, in Figur 4 besteht der Kühlkanal 10 aus zwei miteinan- der verbundenen Rohren 40. Die Rohre 40 sind mit bandartigen Verbindungselementen 41, 42 miteinander verbunden. In Figur 3 verbindet ein Verbindungselement 42 alle vier Rohre 40 das abwechselnd auf der Vorder- und Rückseite bezogen auf die An¬ sicht der Figur 3, geführt ist. Ein zweites Verbindungsele- ment 41 ebenso, nur jeweils auf der anderen Seite des Rohres 40, so dass die Rohre 40 durch die Verbindungselemente 41, 42 mattenartig miteinander verbunden sind. Natürlich können auch mehr oder weniger als vier Rohre 40 auf diese Weise miteinander verbunden werden. In FIGS. 3 and 4, such a cooling channel 12 or 10 is shown in each case. In FIG. 3, the cooling channel 12 consists of four, in FIG. 4 the cooling channel 10 consists of two tubes 40 connected to one another. The tubes 40 are connected to one another by band-like connecting elements 41, 42. In Figure 3, a connecting member 42 connects all four tubes 40 which is alternately performed with respect to the front and back on the on ¬ view of Figure 3. A second connecting element 41 as well, only on the other side of the tube 40, so that the tubes 40 are connected to each other in a mat-like manner by the connecting elements 41, 42. Of course you can too more or fewer than four tubes 40 are connected together in this way.
In Figur 4 sind zwei Rohre 40 durch zwei Verbindungselemente 41 miteinander verbunden. Hier sind die Verbindungselemente 41 um die gleiche Rohrseite der beiden Rohre 40 gelegt. Das Verbindungselement 41 kann auch auf der Rückseite der Rohre 40 weitergeführt sein oder ein zweites Verbindungselement auf der Rückseite der Rohre 40 angebracht sein. In FIG. 4, two tubes 40 are connected to one another by two connecting elements 41. Here, the connecting elements 41 are placed around the same tube side of the two tubes 40. The connecting element 41 can also be continued on the rear side of the tubes 40 or a second connecting element can be mounted on the rear side of the tubes 40.
Bezugs zeichenliste Reference sign list
1 Wicklung 1 winding
10 Kühlkanal aus zwei Rohren 10 cooling channel of two tubes
11 Kühlkanal aus drei Rohren11 Cooling channel made of three tubes
12 Kühlkanal aus vier Rohren12 cooling channel of four tubes
13 Längsachse 13 longitudinal axis
20 Gießharz  20 casting resin
30 Leitermaterial  30 conductor material
31 Isolierfolie  31 insulating film
32 Lage  32 location
40 Rohr  40 pipe
41, 42 Verbindungselemente  41, 42 connecting elements

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer Wicklung (1), wobei ein band- oder drahtförmiges Leitermaterial (30) um eine Längs- achse (13) in mehreren Lagen (32) aufgewickelt wird, wobei zwischen zwei Lagen (32) parallel zur Längsachse (13) verlau¬ fende Rohre (40) mit eingewickelt werden, wobei das aufgewi¬ ckelte Leitermaterial (30) und die eingewickelten Rohre (40) mit einem Kunstharz (20) vergossen werden, und wobei das ver- gossene Kunstharz (20) ausgehärtet wird, 1. A method for producing a winding (1), wherein a band or wire-shaped conductor material (30) about a longitudinal axis (13) in several layers (32) is wound, wherein between two layers (32) parallel to the longitudinal axis (13 ) are wound dur ¬ ¬ fende tubes (40), wherein the aufgewi ¬ ckelte conductor material (30) and the wrapped tubes (40) are cast with a synthetic resin (20), and wherein the cast-resin (20) is cured,
dadurch gekennzeichnet, characterized,
dass wenigstens zwei parallel nebeneinander verlaufende, ei¬ nen Kühlkanal (10, 11, 12) bildenden, Rohre (40) vor dem Einwickeln miteinander beweglich verbunden werden. that at least two adjacent parallel, egg ¬ NEN cooling channel (10, 11, 12) forming tubes (40) prior to wrapping are movably connected with each other.
2. Verfahren zur Herstellung einer Wicklung (1) nach Anspruch 1, 2. A method for producing a winding (1) according to claim 1,
dadurch gekennzeichnet, characterized,
dass die Rohre (40) relativ zueinander bezüglich einer Ver- Schiebung in Längsrichtung fixiert werden. in that the tubes (40) are fixed relative to one another with respect to a displacement in the longitudinal direction.
3. Verfahren zur Herstellung einer Wicklung (l)nach Anspruch 1 oder 2, 3. A method for producing a winding (I) according to claim 1 or 2,
dadurch gekennzeichnet, characterized,
dass jeweils benachbarte Rohre (40) in Bezug auf ihren radia¬ len Abstand fixiert werden. that in each case adjacent tubes (40) are fixed with respect to their radia ¬ len distance.
4. Verfahren zur Herstellung einer Wicklung (1) nach einem der vorangehenden Ansprüche, 4. A method for producing a winding (1) according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass jeweils benachbarte Rohre (40) durch wenigstens ein se¬ parates Verbindungselement (41, 42) miteinander verbunden werden . that in each case adjacent tubes (40) by at least one se ¬ parates connecting element (41, 42) are interconnected.
5. Verfahren zur Herstellung einer (1) nach Anspruch 4, dadurch gekennzeichnet, 5. A process for producing a (1) according to claim 4, characterized
dass das Verbindungselement (41, 42) durch ein die Rohre (40) zumindest teilweise umschlingendes Band gebildet wird. in that the connecting element (41, 42) is formed by a band which at least partially wraps around the tubes (40).
6. Verfahren zur Herstellung einer Wicklung (1) nach einem der vorangehenden Ansprüche, 6. A method for producing a winding (1) according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass die Rohre (40) aus einem elektrisch isolierenden, mechanisch stabilen Material gefertigt werden. that the tubes (40) are made of an electrically insulating, mechanically stable material.
7. Verfahren zur Herstellung einer Wicklung (1) nach einem der vorangehenden Ansprüche, 7. A method for producing a winding (1) according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass die Verbindungselemente (41, 42) aus einem elektrisch isolierenden Material und zumindest teilweise aus einem fa¬ serverstärkten, insbesondere einem glasfaserverstärkten that the connecting elements (41, 42) of an electrically insulating material and at least partially of a fa ¬ server reinforced, in particular a glass fiber reinforced
Kunststoff hergestellt werden. Be made of plastic.
8. Wicklung (1) für ein elektrisches Bauteil, insbesondere einen Transformator, mit wenigstens einem in mehreren Lagen (32) um eine Längsachse (13) aufgewickelten band- oder draht- förmigen Leitermaterial (30) und mit wenigstens einem paral- lel zur Längsachse (13) zwischen zwei dieser Lagen (32) verlaufenden Kühlkanal (10, 11, 12), 8. winding (1) for an electrical component, in particular a transformer, with at least one in several layers (32) about a longitudinal axis (13) wound ribbon or wire-shaped conductor material (30) and at least one parallel to the longitudinal axis (13) between two of these layers (32) extending cooling channel (10, 11, 12),
dadurch gekennzeichnet, characterized,
dass jeder Kühlkanal (10, 11, 12) mehrere parallel verlaufen¬ de, aneinander grenzende Rohre (40) aufweist, die sich dem jeweiligen radialen Verlauf der umschließenden Lagen (32) anschmiegen . that each cooling channel (10, 11, 12) has a plurality of parallel running ¬ de, adjacent tubes (40), which conform to the respective radial course of the enclosing layers (32).
PCT/EP2012/064958 2011-08-11 2012-07-31 Winding and method for producing a winding with a cooling channel WO2013020859A1 (en)

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DE102011080827.2 2011-08-11

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