EP2711943A1 - Channel corner strip for transformers or throttles - Google Patents

Channel corner strip for transformers or throttles Download PDF

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Publication number
EP2711943A1
EP2711943A1 EP12006659.2A EP12006659A EP2711943A1 EP 2711943 A1 EP2711943 A1 EP 2711943A1 EP 12006659 A EP12006659 A EP 12006659A EP 2711943 A1 EP2711943 A1 EP 2711943A1
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EP
European Patent Office
Prior art keywords
channel
winding
core leg
regions
edge
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EP12006659.2A
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German (de)
French (fr)
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EP2711943B1 (en
Inventor
Oliver Harling
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ABB Technology AG
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ABB Technology AG
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Priority to EP12006659.2A priority Critical patent/EP2711943B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid

Definitions

  • the invention relates to a channel strip for a transformer or a throttle, having a roundish cross section and an axially extending wedge-like groove, which is formed by two mutually angled flat areas.
  • the invention also relates to a transformer comprising a transformer core having at least one core leg with a rectangular-like cross-section and a winding wound around the at least one core leg, the winding being spaced radially inwardly from the edges of the core leg by a respective channel strip.
  • transformers or chokes have a respective core with core legs about which electrical windings are arranged.
  • cooling channels are provided by which the costs incurred during operation of the transformer or the throttle loss energy heat in particular the Wicklunge (s) can be dissipated.
  • cooling channels are realized by means of so-called Kanaleckleisten. These are arranged between the edges of the respective core leg and the wrap around this turn, which is thereby spaced from the core leg. In this way, a cooling channel extending axially along the core limb is formed.
  • a Kanaleckance usually has the shape of a round rod, wherein a rectangular circle segment is recessed or milled.
  • the material is preferably a hard electrical insulation material in question.
  • the recesses serve to fix the Kanaleckleisten at the outer edges of the core leg, wherein a respective outer edge of the core leg in this case protrudes positively into the recess.
  • the channel cover strips are coated with the winding material, for example a foil or wire winding.
  • a high winding tensile force is required to fix the individual sheet metal layers of the mostly laminated core leg torsion-free. The winding is thus used in this case to stabilize the core leg or the transformer core.
  • the basic idea of the invention is to form the channel cover strip in such a way that the forces acting on it in the installed state are shifted into areas which prove to be uncritical with respect to possible splitting.
  • the unfavorable area of a force effect with respect to a splitting runs along the bisector of the two areal areas. In this case, an edge of a core leg is pressed directly into the recessed circle segment so that this fission is favored.
  • the rear area is flattened around the bisecting line, so it is provided an axially extending and deepening in comparison to the actually roundish section flattening and / or recess.
  • each spaced Kanaleckleisten in the most critical area around the bisecting line. This results in a cavity between the recess and the corresponding region of the winding.
  • the force acting on a respective channel corner strip is divided into two components acting perpendicular to the respective areal areas. These then bear the forces acting directly on the core limb under certain conditions without a stress load being created between the adjacent support areas.
  • an axially extending relief groove is provided in the intersection region of the two areal regions by which a direct meeting of the areal regions along a common cutting edge is avoided.
  • the area with the highest compressive stress within the Kanaleckance is relieved and prevented a cleavage.
  • a contact of the optionally sharp edge of the core leg with the Kanaleckology is not given in this case.
  • the flattening is pronounced plateau-like.
  • this is particularly easy to produce, for example by milling.
  • it is also ensured that a cavity is formed between the flattened region and the winding conductor and thus no force is applied to the flattened region.
  • Stiffer winding conductors such as thicker copper wires, have a certain crowning and do not immediately follow any bending of an underlying channel corner molding surface. Therefore, in the vast majority of winding conductors, there will be a cavity to the underlying flattened area. But even a very flexible foil-like wrapping material is stretched maximally secant-like between the plateau bordering edge regions, so that even without a cavity, a force of the winding conductor is avoided in the direction of the core leg.
  • a respective flattened area is provided which in each case runs parallel to one of the opposite angled planar areas.
  • the recess is channel-like pronounced, for example in the form of a groove.
  • This offers, for example, manufacturing advantages.
  • sharp edges should be avoided in the case of a channel-like recess, thus a point contact area between winding conductors and channel strip to avoid.
  • the edge regions of the flattening and / or recess, which recesses in comparison to the actually roundish cross-section, are therefore rounded off. The pressure load within the channel header is thus more uniform.
  • the areal areas are angled approximately at a right angle to each other.
  • the wedge-like groove delimited by the areal areas serves for a positive connection with an edge of a core limb then projecting into the groove.
  • the shape or the cross section of the wedge-like groove thus depends on the shape of the edge for a core leg, which in most cases has a rectangular cross-section.
  • this is made of an insulating material, in particular a fiberglass hard tissue.
  • an electrical insulation material reduces the risk of electrical breakdown between the radially inner turns of the winding and the usually grounded transformer core.
  • a hard material such as fiberglass hard, for example, on epoxy resin, is particularly resilient to tensile and compressive stress and can also be particularly easy to edit, for example by milling.
  • the object according to the invention is also achieved by a transformer comprising a transformer core having at least one core limb with a rectangular-like cross-section and a winding wound around the at least one core limb, wherein the coil is spaced radially inwardly from the edges of the core limb by a respective channel lug bead according to the invention.
  • the advantages in this regard have already been explained.
  • the turns of the winding are wound with such a tensile force around the arranged at the corners of the core leg Kanaleckleisten that the mostly lathed core leg is thereby mechanically stabilized.
  • the compressive stress of the channel cover strips is displaced by the cross-sectional shape according to the invention into areas which are related to to prove a possible splitting of the channel strip as uncritical.
  • a respective edge of a core leg engages positively in the wedge-like groove.
  • the winding is in operative contact with the respective spaced Kanaleckmann at each contact edge and / or each of the two mutually angled flat areas is at least in each case a support edge and / or at least a portion of a support surface exactly opposite arranged.
  • the forces acting on the contact areas are then removed directly into the core leg, whereby a risk of breakage of the channel corner strip is reduced.
  • a choke comprising a choke core having at least one core leg with a rectangular-like cross-section and a winding wound around the at least one core leg of the invention, wherein the winding is radially inwardly spaced from the edges of the core leg by a respective Kanaleckang.
  • Fig. 1 shows a section 10 through a first core leg 18, around which two electrical windings 20 and 22 are arranged.
  • the radially inner winding 20 is spaced from the edge regions of the core leg 18 by means of four Kanalaleckleisten according to the prior art and is wound with such a high tensile force that results in a mechanical stabilizing effect on the core leg 18. Due to the high pressure forces a risk of splitting the kanaleckleisten is given.
  • the radially outer subsequent winding 22 is also wound with an increased tensile force and on two opposite sides by means of spacer strips 24, 26 spaced from the underlying winding 20. The gap formed by the spacing serves as a cooling channel 16.
  • Fig. 2 shows a section through a second core leg 42 with a second Kanalaleckang 32 according to the invention in a detail detail drawing 30.
  • the Kanaleckang 32 has an axially extending wedge-like groove, which is formed by two mutually angled flat areas 34, 36.
  • the bisecting line formed between the two area regions 34 and 36 is shown by a dashed line with the reference numeral 38.
  • the edge of the core leg 42 shown in FIG. Protrudes in a form-fitting manner into the wedge-like groove with which it is thus fixed in two directions.
  • the wedge-like groove is in the extension of the bisector 38 rearward an axially extending recess 40 opposite.
  • Fig. 3 shows a section through a third core leg 68 with a third Kanaleckmann 62 in a detail detail drawing 60.
  • the Kanaleckmann has a relief groove 66 in the intersection of the forming them and at an angle 72 to each other angled surface areas.
  • the wedge-like groove is in the extension of the bisector backward facing an axially extending flattening 64. In the region of the flattening 64, a cavity is present underneath the winding 70, so that no forces can be entered from the winding 70 into the channel end strip 62 in this area.
  • Fig. 4 shows a section through a third core leg 88 with a fourth Kanalaleckor 82 in a detail detail drawing 80.
  • the Kanaleckmann 82 has an axially extending wedge-like groove into which an edge of the core leg 88 is fitted form-fitting manner.
  • a round relief groove 86 is provided in the region of intersection of these forming flat areas.
  • the wedge-like groove is in the extension of the bisector backward facing an axially extending plateau-like flattening 84.
  • a section of a winding 90 is guided around the channel corner strip 82 at a 90 ° angle.
  • a cavity is present below the winding 90, so that no forces can be entered from the winding 90 into the channel end strip 82 in this area.
  • Fig. 5 shows a section through a third core leg 112 with a fifth Kanaleckmann 102 in a detail detail drawing 100.
  • the Kanaleckmann 102 has an axially extending wedge-like groove, in the interior of which a flat relief groove 110 is provided in the intersection of these forming flat areas.
  • the wedge-like groove is in the extension of the bisector backward facing an axially extending plateau-like flattening 104.
  • a section of a winding 114 is guided around the channel end strip 102 at a 90 ° angle.
  • a respective flattened area is provided, which in each case angled parallel to one of the opposite flat areas run.
  • the flattened areas provide a larger contact surface for the winding 114, so that the compressive stress inside the channel corner strip is made uniform.

Abstract

The strip (32) has an axial extending wedge-shaped groove formed by two planar regions (34, 36) that are bent at a right angle to each other. The wedge-shaped groove axially and rearwardly extends in an extension of a bisector (38) of the two planar regions. A deepening flat portion and a recess (40) are provided relative to an actual roundish cross-section of the strip. Flattened regions are provided on two sides of the flat portion and the recess and extend parallel to the planar regions. The strip is made of an insulating material i.e. glass fiber laminated fabric. An independent claim is also included for a transformer.

Description

Die Erfindung betrifft eine Kanaleckleiste für einen Transformator oder eine Drossel, aufweisend einen rundlichen Querschnitt und eine axial verlaufende keilähnliche Nut, welche durch zwei zueinander angewinkelte flächige Bereiche gebildet ist. Die Erfindung betrifft auch einen Transformator, umfassend einen Transformatorkern mit wenigstens einem Kernschenkel mit rechteckähnlichem Querschnitt und eine um den wenigstens einen Kernschenkel gewickelte Wicklung, wobei die Wicklung radial innen von den Kanten des Kernschenkels durch jeweils eine Kanaleckleiste beabstandet ist.The invention relates to a channel strip for a transformer or a throttle, having a roundish cross section and an axially extending wedge-like groove, which is formed by two mutually angled flat areas. The invention also relates to a transformer comprising a transformer core having at least one core leg with a rectangular-like cross-section and a winding wound around the at least one core leg, the winding being spaced radially inwardly from the edges of the core leg by a respective channel strip.

Es ist allgemein bekannt, dass Transformatoren oder Drosseln einen jeweiligen Kern mit Kernschenkeln aufweisen, um welche elektrische Wicklungen angeordnet sind. Insbesondere bei Transformatoren oder Drosseln größerer Leistungsklasse, beispielsweise ab einigen 10kVA und auch erheblich darüber, sind Kühlkanäle vorzusehen, durch welche die beim Betrieb des Transformators oder der Drossel anfallende Verlustenergiewärme insbesondere der Wicklunge(en) abgeführt werden kann.It is well known that transformers or chokes have a respective core with core legs about which electrical windings are arranged. Especially with transformers or chokes larger power class, for example, from a few 10kVA and also significantly above, cooling channels are provided by which the costs incurred during operation of the transformer or the throttle loss energy heat in particular the Wicklunge (s) can be dissipated.

Häufig werden derartige Kühlkanäle mittels sogenannter Kanaleckleisten realisiert. Diese werden zwischen den Kanten des jeweiligen Kernschenkels und der um diesen umlaufenden Windung angeordnet, welche hierdurch vom Kernschenkel beabstandet ist. Auf diese Weise ist ein sich axial längs des Kernschenkels erstreckender Kühlkanal gebildet.Often, such cooling channels are realized by means of so-called Kanaleckleisten. These are arranged between the edges of the respective core leg and the wrap around this turn, which is thereby spaced from the core leg. In this way, a cooling channel extending axially along the core limb is formed.

Eine Kanaleckleiste weist zumeist die Form eines Rundstabes auf, wobei ein rechtwinkliges Kreissegment ausgespart beziehungsweise ausgefräst ist. Als Material kommt bevorzugter Weise ein harter elektrischer Isolationswerkstoff in Frage. Die Aussparungen dienen dazu, die Kanaleckleisten an den Außenkanten des Kernschenkels zu fixieren, wobei eine jeweilige Außenkante des Kernschenkels hierbei formschlüssig in die Aussparung hineinragt. Während der Fertigung einer derartigen Wicklung werden die Kanaleckleisten mit dem Wickelgut, beispielsweise einer Folien- oder Drahtwicklung, überzogen. Hierbei ist eine hohe Wickelzugkraft erforderlich, um die einzelnen Blechlagen des zumeist geblecht ausgeführten Kernschenkels verwindungsfrei zu fixieren. Die Wicklung wird also in diesem Fall verwendet, um den Kernschenkel beziehungsweise den Transformatorkern zu stabilisieren.A Kanaleckleiste usually has the shape of a round rod, wherein a rectangular circle segment is recessed or milled. As the material is preferably a hard electrical insulation material in question. The recesses serve to fix the Kanaleckleisten at the outer edges of the core leg, wherein a respective outer edge of the core leg in this case protrudes positively into the recess. During the production of such a winding, the channel cover strips are coated with the winding material, for example a foil or wire winding. In this case, a high winding tensile force is required to fix the individual sheet metal layers of the mostly laminated core leg torsion-free. The winding is thus used in this case to stabilize the core leg or the transformer core.

Aufgrund der hohen Zugkraft der den Kernschenkel umschließenden Wicklung beziehungsweise Wicklungsleiter wird an den Kanaleckleisten eine hohe Kraft in Richtung des Kernschenkels ausgeübt. Die in der kreissegmentförmigen Aussparung befindliche Kante des Kernschenkels begünstigt aufgrund der herrschenden Kräfte einen Spalteffekt auf die Kanaleckleiste, so dass es während der Fertigung einer Transformatorwicklung unter ungünstigen Bedingungen zu einer Spaltung der Kanaleckleiste kommen kann. Aber auch nach Abschluss des Fertigungsprozesses können beispielsweise ein Transport eines Transformators, thermische Schwankungen oder Vibrationen zu einem Bruch einer Kanaleckleiste führen.Due to the high tensile force of the core leg enclosing the winding or winding conductor, a high force is exerted in the direction of the core leg at the channel corner strips. Due to the prevailing forces, the edge of the core limb located in the circular segment-shaped recess favors a splitting effect on the channel edge strip, so that a clipping of the channel edge strip can occur under unfavorable conditions during production of a transformer winding. But even after completion of the manufacturing process, for example, a transport of a transformer, thermal fluctuations or vibrations can lead to breakage of a channel strip.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine Kanaleckleiste bereitzustellen, welche sich als mechanisch stabiler erweist. Aufgabe der Erfindung ist es auch, einen entsprechenden Transformator anzugeben.Based on this prior art, it is an object of the invention to provide a channel header, which proves to be mechanically stable. The object of the invention is also to provide a corresponding transformer.

Diese Aufgabe wird gelöst durch eine Kanaleckleiste der eingangs genannten Art. Diese ist dadurch gekennzeichnet, dass der keilähnlichen Nut in Verlängerung der Winkelhalbierenden der beiden flächigen Bereiche rückwärtig gegenüberliegend eine axial verlaufende und sich im Vergleich zum eigentlich rundlichen Querschnitt vertiefende Abflachung und/oder Ausnehmung vorgesehen ist.This object is achieved by a channel strip of the aforementioned type. This is characterized in that the wedge-like groove in extension of the bisector of the two area areas opposite to an axially extending and deepening in comparison to the actually roundish section flattening and / or recess is provided ,

Die Grundidee der Erfindung besteht darin, die Kanaleckleiste derart auszuformen, dass die im verbauten Zustand auf diese wirkenden Kräfte in Bereiche verlagert werden, welche sich bezügliche einer möglichen Spaltung als unkritisch erweisen. Der bezüglich einer Spaltung ungünstigste Bereich einer Krafteinwirkung verläuft längs der Winkelhalbierenden der beiden flächigen Bereiche. Hierbei wird eine Kante eines Kernschenkels direkt in das ausgesparte Kreissegment hineingedrückt so dass hierdurch eine Spaltung begünstigt ist.The basic idea of the invention is to form the channel cover strip in such a way that the forces acting on it in the installed state are shifted into areas which prove to be uncritical with respect to possible splitting. The unfavorable area of a force effect with respect to a splitting runs along the bisector of the two areal areas. In this case, an edge of a core leg is pressed directly into the recessed circle segment so that this fission is favored.

Erfindungsgemäß wird der rückwärtige Bereich um die Winkelhalbierende abgeflacht, es ist also eine axial verlaufende und sich im Vergleich zum eigentlich rundlichen Querschnitt vertiefende Abflachung und/oder Ausnehmung vorgesehen. Damit wird eine Auflagekante und/oder eine Auflagefläche der Wicklung auf den diese jeweils beabstandenden Kanaleckleisten im kritischsten Bereich um die Winkelhalbierende vermieden. Es entsteht somit ein Hohlraum zwischen der Aussparung und dem entsprechenden Bereich der Wicklung. Bei einem rechten Winkel zwischen den beiden flächigen Bereichen teilt sich die auf eine jeweilige Kanaleckleiste einwirkende Kraft in zwei senkrecht zu den jeweiligen flächigen Bereichen wirkende Komponenten auf. Diese tragen die einwirkenden Kräfte dann unter bestimmten Voraussetzungen direkt auf den Kernschenkel ab ohne dass zwischen den angrenzenden Auflagebereichen eine Spannungsbelastung entstehen würde.According to the invention, the rear area is flattened around the bisecting line, so it is provided an axially extending and deepening in comparison to the actually roundish section flattening and / or recess. In order for a support edge and / or a bearing surface of the winding is avoided on this each spaced Kanaleckleisten in the most critical area around the bisecting line. This results in a cavity between the recess and the corresponding region of the winding. At a right angle between the two areal regions, the force acting on a respective channel corner strip is divided into two components acting perpendicular to the respective areal areas. These then bear the forces acting directly on the core limb under certain conditions without a stress load being created between the adjacent support areas.

Diese Voraussetzungen bestehen dann, wenn im verbauten Zustand der Kanaleckleiste ein Auflagebereich und/oder eine Auflagekante der Wicklung auf der Kanaleckleiste vermieden sind, welche nicht direkt gegenüber einem der beiden zueinander angewinkelten flächigen Bereiche angeordnet sind. Einwirkende Kräfte werden dann direkt auf den darunter liegenden Kernschenkel abgetragen und entsprechende Scherkräfte innerhalb der Kanaleckleiste unterhalb der Aussparung in vorteilhafter Weise vermieden.These prerequisites exist when, in the installed state of the channel edge strip, a bearing area and / or a bearing edge of the winding on the channel edge strip are avoided, which are not arranged directly opposite one of the two plane areas which are angled toward one another. Acting forces are then removed directly to the underlying core limb and avoided corresponding shear forces within the Kanaleckleiste below the recess in an advantageous manner.

Auf diese Weise ist durch eine entsprechende Formgebung des Querschnitts der Kanaleckleiste eine Verlagerung der im verbauten Zustand einwirkenden Kräfte in Bereiche erreicht, welche sich bezüglich einer Spaltung der Kanaleckleiste als unkritisch erweisen.In this way, by a corresponding shaping of the cross section of the channel strip, a displacement of the forces acting in the installed state forces reaches into areas which prove to be uncritical with respect to a splitting of the channel strip.

Gemäß einer besonders bevorzugten Ausgestaltungsform der erfindungsgemäßen Kanaleckleiste ist im Schnittbereich der beiden flächigen Bereiche eine axial verlaufende Entlastungsnut vorgesehen durch welche ein direktes Aufeinandertreffen der flächigen Bereiche längs einer gemeinsamen Schnittkante vermieden ist. Auf diese Weise wird der Bereich mit der höchsten Druckspannungsbelastung innerhalb der Kanaleckleiste entlastet und einer Spaltung vorgebeugt. Ein Kontakt der gegebenenfalls scharfen Kante des Kernschenkels mit der Kanaleckleiste ist in diesem Fall nicht gegeben.According to a particularly preferred embodiment of the channel strip according to the invention, an axially extending relief groove is provided in the intersection region of the two areal regions by which a direct meeting of the areal regions along a common cutting edge is avoided. In this way, the area with the highest compressive stress within the Kanaleckleiste is relieved and prevented a cleavage. A contact of the optionally sharp edge of the core leg with the Kanaleckleiste is not given in this case.

Gemäß einer weiteren Ausgestaltung der erfindungsgemäßen Kanaleckleiste ist die Abflachung plateauähnlich ausgeprägt. Dies ist einerseits besonders einfach beispielsweise durch Fräsen herzustellen. Andererseits ist auch gewährleistet, dass zwischen dem abgeflachten Bereich und dem Wickelleiter ein Hohlraum gebildet ist und so keine Krafteinwirkung auf den abgeflachten Bereich erfolgt. Steifere Wickelleiter wie dickere Kupferdrähte weise eine gewisse Balligkeit auf und folgen nicht unmittelbar jeder Biegung einer darunter befindlichen Kanaleckleistenoberfläche. Daher wird bei den allermeisten Wickelleitern ein Hohlraum zu dem darunter befindlichen abgeflachten Bereich vorhanden sein. Aber selbst ein sehr flexibles folienartiges Wickelmaterial wird zwischen den das Plateau begrenzenden Kantenbereichen maximal sekantenartig gespannt, so dass auch ohne Hohlraum eine Krafteinwirkung des Wickelleiters in Richtung des Kernschenkels vermieden ist.According to a further embodiment of the channel strip according to the invention, the flattening is pronounced plateau-like. On the one hand, this is particularly easy to produce, for example by milling. On the other hand, it is also ensured that a cavity is formed between the flattened region and the winding conductor and thus no force is applied to the flattened region. Stiffer winding conductors, such as thicker copper wires, have a certain crowning and do not immediately follow any bending of an underlying channel corner molding surface. Therefore, in the vast majority of winding conductors, there will be a cavity to the underlying flattened area. But even a very flexible foil-like wrapping material is stretched maximally secant-like between the plateau bordering edge regions, so that even without a cavity, a force of the winding conductor is avoided in the direction of the core leg.

Einer weiteren Ausführungsvariante der erfindungsgemäßen Kanaleckleiste folgend sind beiderseits der Abflachung und/oder Ausnehmung ein jeweiliger abgeplatteter Bereich vorgesehen, welche jeweils parallel zu einem der gegenüberliegenden angewinkelten flächigen Bereiche verlaufen. Hierdurch wird die Auflagefläche des Wickelleiters auf der Oberfläche einer jeweiligen Kanaleckleiste in vorteilhafter Weise erhöht, so dass die Druckbeanspruchung innerhalb der Kanaleckleiste reduziert beziehungsweise vergleichmäßigt ist.Following a further embodiment variant of the channel edge strip according to the invention, on both sides of the flattening and / or recess, a respective flattened area is provided which in each case runs parallel to one of the opposite angled planar areas. As a result, the bearing surface of the winding conductor is advantageously increased on the surface of a respective channel strip, so that the compressive stress within the channel strip is reduced or evened out.

Entsprechend einer weiteren Ausgestaltungsvariante ist die Ausnehmung kanalähnlich ausgeprägt, beispielsweise in Form einer Nut. Dies bietet beispielsweise fertigungstechnische Vorteile. Idealerweise sind scharfe Kanten bei einer kanalähnlichen Ausnehmung zu vermeiden, um so eine punktuelle Kontaktbereiche zwischen Wickelleiter und Kanaleckleiste zu vermeiden. Gemäß einer weiteren Ausgestaltungsform der Kanaleckleiste sind der Kantenbereiche der sich im Vergleich zum eigentlich rundlichen Querschnitt vertiefenden Abflachung und/oder Ausnehmung daher abgerundet. Die Druckbelastung innerhalb der Kanaleckleiste wird dadurch gleichmäßiger.According to a further embodiment variant, the recess is channel-like pronounced, for example in the form of a groove. This offers, for example, manufacturing advantages. Ideally, sharp edges should be avoided in the case of a channel-like recess, thus a point contact area between winding conductors and channel strip to avoid. According to a further embodiment of the channel strip, the edge regions of the flattening and / or recess, which recesses in comparison to the actually roundish cross-section, are therefore rounded off. The pressure load within the channel header is thus more uniform.

In einer besonders bevorzugten Ausgestaltungsform der Kanaleckleiste sind die flächigen Bereiche in etwa in einem rechten Winkel zueinander angewinkelt. Die durch die flächigen Bereiche begrenzte keilähnliche Nut dient einer formschlüssigen Verbindung mit einer Kante eines dann in die Nut hineinragenden Kernschenkels. Die Form beziehungsweise der Querschnitt der keilähnlichen Nut richtet sich somit nach der Form der Kante eines für Kernschenkels, welcher in den meisten Fällen einen rechteckförmigen Querschnitt aufweist.In a particularly preferred embodiment of the channel strip, the areal areas are angled approximately at a right angle to each other. The wedge-like groove delimited by the areal areas serves for a positive connection with an edge of a core limb then projecting into the groove. The shape or the cross section of the wedge-like groove thus depends on the shape of the edge for a core leg, which in most cases has a rectangular cross-section.

Entsprechend einer besonders bevorzugten Variante der erfindungsgemäßen Kanaleckleiste ist diese aus einem Isolationsmaterial, insbesondere einem Glasfaserhartgewebe, gefertigt. Die Verwendung eines elektrischen Isolationsmaterials reduziert die Gefahr eines elektrischen Durchschlages zwischen den radial innen liegenden Windungen der Wicklung und dem zumeist geerdetem Transformatorkern. Ein hartes Material wie ein Glasfaserhartgewebe, beispielsweise auf Epoxidharzbasis, ist besonders belastbar auf Zug- und Druckspannung und lässt sich zudem besonders einfach bearbeiten, beispielsweise durch Fräsen.According to a particularly preferred variant of the channel strip according to the invention this is made of an insulating material, in particular a fiberglass hard tissue. The use of an electrical insulation material reduces the risk of electrical breakdown between the radially inner turns of the winding and the usually grounded transformer core. A hard material such as fiberglass hard, for example, on epoxy resin, is particularly resilient to tensile and compressive stress and can also be particularly easy to edit, for example by milling.

Die erfindungsgemäße Aufgabe wird auch gelöst durch einen Transformator, umfassend einen Transformatorkern mit wenigstens einem Kernschenkel mit rechteckähnlichem Querschnitt und eine um den wenigstens einen Kernschenkel gewickelte Wicklung, wobei die Wicklung radial innen von den Kanten des Kernschenkels durch jeweils eine erfindungsgemäße Kanaleckleiste beabstandet ist. Die diesbezüglichen Vorteile wurden bereits zuvor erläutert. Die Windungen der Wicklung werden mit einer derartigen Zugkraft um die an den Eckpunkten des Kernschenkels angeordneten Kanaleckleisten gewickelt, dass der zumeist geblechte Kernschenkel dadurch mechanisch stabilisiert ist. Die Druckbeanspruchung der Kanaleckleisten wird durch die erfindungsgemäße Querschnittsform in Bereiche verlagert, welche sich bezüglich einer möglichen Spaltung der Kanaleckleiste als unkritisch erweisen. Eine jeweilige Kante eines Kernschenkels greift hierbei formschlüssig in die keilähnliche Nut ein.The object according to the invention is also achieved by a transformer comprising a transformer core having at least one core limb with a rectangular-like cross-section and a winding wound around the at least one core limb, wherein the coil is spaced radially inwardly from the edges of the core limb by a respective channel lug bead according to the invention. The advantages in this regard have already been explained. The turns of the winding are wound with such a tensile force around the arranged at the corners of the core leg Kanaleckleisten that the mostly lathed core leg is thereby mechanically stabilized. The compressive stress of the channel cover strips is displaced by the cross-sectional shape according to the invention into areas which are related to to prove a possible splitting of the channel strip as uncritical. A respective edge of a core leg engages positively in the wedge-like groove.

Gemäß einer besonders bevorzugten Ausgestaltungsform des erfindungsgemäßen Transformators steht die Wicklung an verschiedenen Auflagekanten und/oder Auflageflächen mit der diese jeweils beabstandenden Kanaleckleiste in Wirkkontakt und jedem der beiden zueinander angewinkelten flächigen Bereiche ist wenigstens jeweils eine Auflagekante und/oder zumindest ein Teil einer Auflagefläche genau gegenüber liegend angeordnet. Wie bereits zuvor erläutert werden die auf die Auflagebereiche wirkenden Kräfte dann direkt in den Kernschenkel abgetragen, wodurch eine Bruchgefahr der Kanaleckleiste verringert ist.According to a particularly preferred embodiment of the transformer according to the invention, the winding is in operative contact with the respective spaced Kanaleckleiste at each contact edge and / or each of the two mutually angled flat areas is at least in each case a support edge and / or at least a portion of a support surface exactly opposite arranged. As already explained above, the forces acting on the contact areas are then removed directly into the core leg, whereby a risk of breakage of the channel corner strip is reduced.

In vergleichbarer Weise ist auch eine Drossel, umfassend einen Drosselkern mit wenigstens einem Kernschenkel mit rechteckähnlichem Querschnitt und eine um den wenigstens einen Kernschenkel gewickelte Wicklung von der Erfindung umfasst, wobei die Wicklung radial innen von den Kanten des Kernschenkels durch jeweils eine erfindungsgemäße Kanaleckleiste beabstandet ist.Similarly, a choke comprising a choke core having at least one core leg with a rectangular-like cross-section and a winding wound around the at least one core leg of the invention, wherein the winding is radially inwardly spaced from the edges of the core leg by a respective Kanaleckleiste.

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
einen Schnitt durch einen ersten Kernschenkel mit Wicklung,
Fig. 2
einen Schnitt durch einen zweiten Kernschenkel mit zweiter Kanaleckleiste,
Fig. 3
einen Schnitt durch einen dritten Kernschenkel mit dritter Kanaleckleiste,
Fig. 4
einen Schnitt durch einen vierten Kernschenkel mit vierter Kanaleckleiste sowie
Fig. 5
einen Schnitt durch einen fünften Kernschenkel mit fünfter Kanaleckleiste.
Show it:
Fig. 1
a section through a first core leg with winding,
Fig. 2
a section through a second core leg with second channel edge strip,
Fig. 3
a section through a third core leg with third Kanalaleckleiste,
Fig. 4
a section through a fourth core leg with fourth Kanalaleckleiste as well
Fig. 5
a section through a fifth core leg with fifth Kanalaleckleiste.

Fig. 1 zeigt einen Schnitt 10 durch einen ersten Kernschenkel 18, um welchen herum zwei elektrische Wicklungen 20 und 22 angeordnet sind. Die radial innere Wicklung 20 wird von den Kantenbereichen des Kernschenkels 18 mittels vier Kanaleckleisten entsprechend dem Stand der Technik beabstandet und ist mit einer derart hohen Zugkraft gewickelt, dass sich eine mechanisch stabilisierende Wirkung auf den Kernschenkel 18 ergibt. Durch die hohen Druckkräfte ist eine Spaltgefahr der kanaleckleisten gegeben. Die sich radial außen anschließende Wicklung 22 ist ebenfalls mit einer erhöhten Zugkraft gewickelt und an zwei gegenüberliegenden Seiten mittels Abstandsleisten 24, 26 von der darunter liegenden Wicklung 20 beabstandet. Der durch das Beabstanden entstandene Zwischenraum dient als Kühlkanal 16. Fig. 1 shows a section 10 through a first core leg 18, around which two electrical windings 20 and 22 are arranged. The radially inner winding 20 is spaced from the edge regions of the core leg 18 by means of four Kanalaleckleisten according to the prior art and is wound with such a high tensile force that results in a mechanical stabilizing effect on the core leg 18. Due to the high pressure forces a risk of splitting the kanaleckleisten is given. The radially outer subsequent winding 22 is also wound with an increased tensile force and on two opposite sides by means of spacer strips 24, 26 spaced from the underlying winding 20. The gap formed by the spacing serves as a cooling channel 16.

Fig. 2 zeigt einen Schnitt durch einen zweiten Kernschenkel 42 mit einer erfindungsgemäßen zweiten Kanaleckleiste 32 in einer Ausschnitts-Detailzeichnung 30. Die Kanaleckleiste 32 weist eine axial verlaufende keilähnliche Nut auf, welche durch zwei zueinander angewinkelte flächige Bereiche 34, 36 gebildet ist. Die zwischen den beiden flächigen Bereichen 34 und 36 gebildete Winkelhalbierende ist mit einer gestrichelten Linie mit der Bezugsziffer 38 dargestellt. Die in der Fig. dargestellte Kante des Kernschenkels 42 ragt formschlüssig in die keilähnliche Nut herein womit diese damit in zwei Richtungen fixiert ist. Der keilähnlichen Nut liegt in Verlängerung der Winkelhalbierenden 38 rückwärtig eine axial verlaufende Ausnehmung 40 gegenüber. Fig. 2 shows a section through a second core leg 42 with a second Kanalaleckleiste 32 according to the invention in a detail detail drawing 30. The Kanaleckleiste 32 has an axially extending wedge-like groove, which is formed by two mutually angled flat areas 34, 36. The bisecting line formed between the two area regions 34 and 36 is shown by a dashed line with the reference numeral 38. The edge of the core leg 42 shown in FIG. Protrudes in a form-fitting manner into the wedge-like groove with which it is thus fixed in two directions. The wedge-like groove is in the extension of the bisector 38 rearward an axially extending recess 40 opposite.

Um die Kanaleckleiste 32 herum ist in einem 90° Winkel ein Abschnitt einer Wicklung 44 geführt. Im Bereich der Ausnehmung 40 ist ein Hohlraum unterhalb der Wicklung 44 vorhanden, so dass in diesem Bereich keine Kräfte von der Wicklung 44 in die Kanaleckleiste 32 eingetragen werden können. Die von der Zugspannung der Wicklung 44 verursachten Kräfte teilen sich in zwei senkrecht zueinander stehende Kraftkomponenten, welche mit Pfeilen mit den Bezugsnummern 46 und 48 angedeutet sind. Die Kräfte 46, 48 werden direkt und senkrecht in eine jeweilige Seitenkante des Kernschenkels 42 eingeleitet, so dass sich keine oder nur geringe Scherkräfte ergeben, was einer Spaltung der Kanaleckleiste 32 vorbeugt. Ohne die Ausnehmung 40 würde sich ein aufgrund der Balligkeit der Wicklung 44 ein Auflagepunkt der Wicklung 44 an der Winkelhalbierenden 38 ergeben, so dass dann eine dort eine Kraftkomponente einwirken würde, wie mit dem Pfeil mit der Bezugsziffer 50 angedeutet.Around the channel strip 32 around a portion of a winding 44 is guided at a 90 ° angle. In the region of the recess 40, a cavity below the winding 44 is present, so that no forces can be entered from the winding 44 into the channel end strip 32 in this area. The forces caused by the tension of the winding 44 divide into two mutually perpendicular force components, which are indicated by arrows with the reference numerals 46 and 48. The forces 46, 48 are introduced directly and vertically into a respective side edge of the core leg 42, so that no or only small shear forces result, which prevents a splitting of the channel edge strip 32. Without the recess 40 due to the crowning of the winding 44, a bearing point of the winding 44 at the angle bisector 38 would result, so that then there would act a force component, as indicated by the arrow with the reference numeral 50.

Fig. 3 zeigt einen Schnitt durch einen dritten Kernschenkel 68 mit einer dritten Kanaleckleiste 62 in einer Ausschnitts-Detailzeichnung 60. Die Kanaleckleiste weist im Schnittbereich der sie bildenden und in einem Winkel 72 zueinander angewinkelten flächigen Bereiche eine Entlastungsnut 66 auf. Der keilähnlichen Nut liegt in Verlängerung der Winkelhalbierenden rückwärtig eine axial verlaufende Abflachung 64 gegenüber. Im Bereich der Abflachung 64 ist ein Hohlraum unterhalb der Wicklung 70 vorhanden, so dass in diesem Bereich keine Kräfte von der Wicklung 70 in die Kanaleckleiste 62 eingetragen werden können. Fig. 3 shows a section through a third core leg 68 with a third Kanaleckleiste 62 in a detail detail drawing 60. The Kanaleckleiste has a relief groove 66 in the intersection of the forming them and at an angle 72 to each other angled surface areas. The wedge-like groove is in the extension of the bisector backward facing an axially extending flattening 64. In the region of the flattening 64, a cavity is present underneath the winding 70, so that no forces can be entered from the winding 70 into the channel end strip 62 in this area.

Fig. 4 zeigt einen Schnitt durch einen dritten Kernschenkel 88 mit einer vierten Kanaleckleiste 82 in einer Ausschnitts-Detailzeichnung 80. Die Kanaleckleiste 82 weist eine axial verlaufende keilähnliche Nut auf, in welche eine Kante des Kernschenkels 88 formschlüssig eingepasst ist. Im Inneren der keilähnlichen Nut ist im Schnittbereich der diese bildenden flächigen Bereichen eine runde Entlastungsnut 86 vorgesehen. Der keilähnlichen Nut liegt in Verlängerung der Winkelhalbierenden rückwärtig eine axial verlaufende plateauähnliche Abflachung 84 gegenüber. Um die Kanaleckleiste 82 herum ist in einem 90° Winkel ein Abschnitt einer Wicklung 90 geführt. Im Bereich der plateauähnlichen Abflachung 84 ist ein Hohlraum unterhalb der Wicklung 90 vorhanden, so dass in diesem Bereich keine Kräfte von der Wicklung 90 in die Kanaleckleiste 82 eingetragen werden können. Fig. 4 shows a section through a third core leg 88 with a fourth Kanalaleckleiste 82 in a detail detail drawing 80. The Kanaleckleiste 82 has an axially extending wedge-like groove into which an edge of the core leg 88 is fitted form-fitting manner. In the interior of the wedge-like groove, a round relief groove 86 is provided in the region of intersection of these forming flat areas. The wedge-like groove is in the extension of the bisector backward facing an axially extending plateau-like flattening 84. A section of a winding 90 is guided around the channel corner strip 82 at a 90 ° angle. In the area of the plateau-like flattening 84, a cavity is present below the winding 90, so that no forces can be entered from the winding 90 into the channel end strip 82 in this area.

Fig. 5 zeigt einen Schnitt durch einen dritten Kernschenkel 112 mit einer fünften Kanaleckleiste 102 in einer Ausschnitts-Detailzeichnung 100. Die Kanaleckleiste 102 weist eine axial verlaufende keilähnliche Nut auf, in deren Inneren im Schnittbereich der diese bildenden flächigen Bereichen eine runde Entlastungsnut 110 vorgesehen ist. Der keilähnlichen Nut liegt in Verlängerung der Winkelhalbierenden rückwärtig eine axial verlaufende plateauähnliche Abflachung 104 gegenüber. Um die Kanaleckleiste 102 herum ist in einem 90° Winkel ein Abschnitt einer Wicklung 114 geführt. Beiderseits der plateauähnlichen Abflachung 104 sind ein jeweiliger abgeplatteter Bereich vorgesehen, welche jeweils parallel zu einem der gegenüberliegenden angewinkelten flächigen Bereiche verlaufen. Durch die abgeplatteten Bereiche ist eine größere Auflagefläche für die Wicklung 114 bereitgestellt, so dass die Druckbeanspruchung innerhalb der Kanaleckleiste vergleichmäßigt wird. Fig. 5 shows a section through a third core leg 112 with a fifth Kanaleckleiste 102 in a detail detail drawing 100. The Kanaleckleiste 102 has an axially extending wedge-like groove, in the interior of which a flat relief groove 110 is provided in the intersection of these forming flat areas. The wedge-like groove is in the extension of the bisector backward facing an axially extending plateau-like flattening 104. A section of a winding 114 is guided around the channel end strip 102 at a 90 ° angle. On both sides of the plateau-like flattening 104, a respective flattened area is provided, which in each case angled parallel to one of the opposite flat areas run. The flattened areas provide a larger contact surface for the winding 114, so that the compressive stress inside the channel corner strip is made uniform.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Schnitt durch einen ersten Kernschenkel mit WicklungCut through a first core leg with winding
1212
erste Kanaleckleiste um ersten Kernschenkelfirst channel strip around first core leg
1414
weitere Kanaleckleiste um ersten Kernschenkelfurther channel strip around first core leg
1616
Kühlkanalcooling channel
1818
erster Kernschenkelfirst core leg
2020
erste Wicklung um ersten Kernschenkelfirst winding around first core leg
2222
zweite Wicklung um ersten Kernschenkelsecond winding around the first core leg
2424
erste Abstandsleistefirst spacer bar
2626
zweite Abstandsleistesecond spacer bar
3030
Schnitt durch zweiten Kernschenkel mit zweiter KanaleckleisteSection through second core leg with second channel edge strip
3232
zweite Kanaleckleistesecond channel strip
3434
erster flächiger Bereichfirst area
3636
zweiter flächiger Bereichsecond area
3838
Winkelhalbierende zwischen flächigen BereichenAngle bisector between flat areas
4040
axial verlaufende Ausnehmungaxially extending recess
4242
zweiter Kernschenkelsecond core leg
4444
Wicklung um zweiten KernschenkelWinding around second core leg
4646
erste Kraftkomponentefirst force component
4848
zweite Kraftkomponentesecond force component
5050
resultierende Kraftkomponenteresulting force component
6060
Schnitt durch dritten Kernschenkel mit dritter KanaleckleisteSection through third core leg with third channel edge strip
6262
dritte Kanaleckleistethird channel strip
6464
Abflachungflattening
6666
Entlastungsnutrelief
6868
dritter Kernschenkelthird core leg
7070
Wicklung um dritten KernschenkelWinding around third core leg
7272
Winkel zwischen flächigen BereichenAngle between flat areas
8080
Schnitt durch vierten Kernschenkel mit vierter KanaleckleisteSection through fourth core leg with fourth channel edge strip
8282
vierte Kanaleckleistefourth channel strip
8484
erste plateauähnliche Abflachungfirst plateau-like flattening
8686
Entlastungsnutrelief
8888
vierter Kernschenkelfourth core thigh
9090
Wicklung um vierten KernschenkelWinding around fourth core leg
100100
Schnitt durch fünften Kernschenkel mit fünfter KanaleckleisteSection through fifth core leg with fifth channel edge strip
102102
fünfte Kanaleckleistefifth channel strip
104104
zweite plateauähnliche Abflachungsecond plateau-like flattening
106106
erster abgeplatteter Bereichfirst flattened area
108108
zweiter abgeplatteter Bereichsecond flattened area
110110
Entlastungsnutrelief
112112
fünfter Kernschenkelfifth core leg
114114
Wicklung um fünften KernschenkelWinding around fifth core leg

Claims (11)

Kanaleckleiste (12, 14, 32, 62, 82, 102) für einen Transformator oder eine Drossel, aufweisend einen rundlichen Querschnitt und eine axial verlaufende keilähnliche Nut, welche durch zwei zueinander angewinkelte (72) flächige Bereiche (34, 36) gebildet ist,
dadurch gekennzeichnet, dass
der keilähnlichen Nut in Verlängerung der Winkelhalbierenden (38) der beiden flächigen Bereiche (34, 36) rückwärtig gegenüberliegend eine axial verlaufende und sich im Vergleich zum eigentlich rundlichen Querschnitt vertiefende Abflachung (64) und/oder Ausnehmung (40) vorgesehen ist.Channel header (12, 14, 32, 62, 82, 102) for a transformer or throttle having a roundish cross-section and an axially extending wedge-like groove formed by two mutually angled (72) area regions (34, 36),
characterized in that
the wedge-like groove in the extension of the bisectors (38) of the two flat areas (34, 36) opposite to an axially extending and in comparison to the actually roundish section deepening flattening (64) and / or recess (40) is provided. Kanaleckleiste nach Anspruch 1, dadurch gekennzeichnet dass im Schnittbereich der beiden flächigen Bereiche (34, 36) eine axial verlaufende Entlastungsnut (66, 86. 110) vorgesehen ist, durch welche ein direktes Aufeinandertreffen der flächigen Bereiche (34, 36) längs einer gemeinsamen Schnittkante vermieden ist.Channel strip according to claim 1, characterized in that an axially extending relief groove (66, 86. 110) is provided in the intersection region of the two planar regions (34, 36), through which a direct meeting of the flat regions (34, 36) along a common cutting edge is avoided. Kanaleckleiste nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Abflachung plateauähnlich (84, 88) ausgeprägt ist.Channel strip according to claim 1 or 2, characterized in that the flattening is plateau-like (84, 88) pronounced. Kanaleckleiste nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass beiderseits der Abflachung (64) und/oder Ausnehmung (40) ein jeweiliger abgeplatteter Bereich (106, 108) vorgesehen sind, welche jeweils parallel zu einem der gegenüberliegenden angewinkelten (72) flächigen Bereiche (34, 36) verlaufen.Channel edge strip according to one of the preceding claims, characterized in that on both sides of the flattening (64) and / or recess (40) a respective flattened area (106, 108) are provided, each parallel to one of the opposite angled (72) area regions ( 34, 36) run. Kanaleckleiste nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung (40) kanalähnlich ausgeprägt ist.Channel cover according to one of the preceding claims, characterized in that the recess (40) is channel-like pronounced. Kanaleckleiste nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass Kantenbereiche der sich im Vergleich zum eigentlich rundlichen Querschnitt vertiefenden Abflachung (64) und/oder Ausnehmung (40) abgerundet sind.Channel edge strip according to one of the preceding claims, characterized in that edge regions of the flattening (64) and / or recess (40), which recesses in comparison to the actually roundish cross-section, are rounded off. Kanaleckleiste nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die flächigen Bereiche (34, 36) in etwa in einem rechten Winkel zueinander angewinkelt (72) sind.Channel strip according to one of the preceding claims, characterized in that the areal regions (34, 36) are angled approximately at a right angle to each other (72). Kanaleckleiste nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass diese aus einem Isolationsmaterial, insbesondere einem Glasfaserhartgewebe, gefertigt sind.Channel strip according to one of the preceding claims, characterized in that they are made of an insulating material, in particular a fiberglass hard tissue. Transformator, umfassend einen Transformatorkern mit wenigstens einem Kernschenkel (18, 42, 68, 88, 112) mit rechteckähnlichem Querschnitt und eine um den wenigstens einen Kernschenkel gewickelte Wicklung (20, 22, 44, 70, 90, 114), wobei die Wicklung radial innen von den Kanten des Kernschenkels (18, 42, 68, 88, 112) durch jeweils eine Kanaleckleiste beabstandet ist,
dadurch gekennzeichnet,
dass die Kanaleckleiste (12, 14, 32, 62, 82, 102) nach einem der Ansprüche 1 bis 8 ausgeführt ist.A transformer comprising a transformer core having at least one core leg (18, 42, 68, 88, 112) of rectangular cross section and a winding (20, 22, 44, 70, 90, 114) wound around said at least one core leg, said winding being radial inside of the edges of the core leg (18, 42, 68, 88, 112) is spaced by a respective Kanaleckleiste,
characterized,
in that the channel corner strip (12, 14, 32, 62, 82, 102) is designed according to one of claims 1 to 8. Transformator nach Anspruch 9, dadurch gekennzeichnet, dass eine jeweilige Kante eines Kernschenkels (18, 42, 68, 88, 112) formschlüssig in die keilähnliche Nut eingreift.Transformer according to claim 9, characterized in that a respective edge of a core leg (18, 42, 68, 88, 112) engages positively in the wedge-like groove. Transformator nach einem der Ansprüche 9 oder 10, dadurch gekennzeichnet, dass die Wicklung (20, 22, 44, 70, 90, 114) an verschiedenen Auflagekanten und/oder Auflageflächen mit der diese jeweils beabstandenden Kanaleckleiste (12, 14, 32, 62, 82, 102) in Wirkkontakt steht und dass jedem der beiden zueinander angewinkelten (72) flächigen Bereiche (34, 36) wenigstens jeweils eine Auflagekante und oder zumindest ein Teil einer Auflagefläche genau gegenüber liegend angeordnet ist.Transformer according to one of claims 9 or 10, characterized in that the winding (20, 22, 44, 70, 90, 114) on various support edges and / or bearing surfaces with which they each be spaced Kanaleckleiste (12, 14, 32, 62, 82, 102) is in operative contact and that each of the two mutually angled (72) areal regions (34, 36) at least one support edge and / or at least a portion of a support surface is located exactly opposite.
EP12006659.2A 2012-09-22 2012-09-22 Channel corner strip for transformers or throttles Active EP2711943B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013216585A1 (en) * 2013-08-21 2015-02-26 Mdexx Gmbh Throttle and transformer angle profile and method for its production

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070783A1 (en) * 1981-07-20 1983-01-26 Legrand Coil spacer
US4447796A (en) * 1982-04-05 1984-05-08 Mcgraw-Edison Company Self-adjusting spacer
DE102009030068A1 (en) * 2009-06-22 2010-12-30 Mdexx Gmbh Cooling element for a throttle or a transformer and inductor and transformer with such a cooling element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070783A1 (en) * 1981-07-20 1983-01-26 Legrand Coil spacer
US4447796A (en) * 1982-04-05 1984-05-08 Mcgraw-Edison Company Self-adjusting spacer
DE102009030068A1 (en) * 2009-06-22 2010-12-30 Mdexx Gmbh Cooling element for a throttle or a transformer and inductor and transformer with such a cooling element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013216585A1 (en) * 2013-08-21 2015-02-26 Mdexx Gmbh Throttle and transformer angle profile and method for its production

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