EP2973621B1 - Winding layer pitch compensation for an air-core reactor - Google Patents

Winding layer pitch compensation for an air-core reactor Download PDF

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Publication number
EP2973621B1
EP2973621B1 EP14707078.3A EP14707078A EP2973621B1 EP 2973621 B1 EP2973621 B1 EP 2973621B1 EP 14707078 A EP14707078 A EP 14707078A EP 2973621 B1 EP2973621 B1 EP 2973621B1
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EP
European Patent Office
Prior art keywords
star
winding layer
sheets
slot
layer pitch
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EP14707078.3A
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German (de)
French (fr)
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EP2973621A1 (en
Inventor
Otto HASLEHNER
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Siemens AG
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Siemens AG
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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
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
    • 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
    • H01F27/006—Details of transformers or inductances, in general with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
    • 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
    • H01F27/2823—Wires
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/08—Fixed transformers not covered by group H01F19/00 characterised by the structure without magnetic core

Definitions

  • the present invention relates to a winding layer pitch compensation for an air throttle coil having at least two concentric, radially spaced winding layers.
  • Air throttle coils such as known from WO2009 / 126977 , are used in energy supply networks and are - in contrast to oil-insulated coils - "dry-insulated” inductors, in which the insulation is accomplished by solid insulation and sufficient creepage and clearance and which usually also contain no ferromagnetic core, ie their central air space is free ,
  • the concentric winding layers of the air throttle coil are each held at their upper and lower axial ends by a holding star, which is composed of a plurality of star-shaped radially arranged arms, so-called star blades.
  • a holding star which is composed of a plurality of star-shaped radially arranged arms, so-called star blades.
  • star blades instead of a one-piece holding star, it is also possible in each case to use a large number of individual star leaves, which lie only in the area below and above the winding layers in order to save star-blade material.
  • the opposing holding stars or star blades are biased against each other by means of running between the winding layers spacer strips or Switzerlandbandagen to hold the winding layers.
  • the star blades and spacer strips are used simultaneously as a winding aids by first spanned the lower star blades on a rotating device and then the winding layers are built thereon, with a set of spacer strips is mounted therebetween.
  • the currently known compensating blades are relatively complex parts, since the height to be compensated between a star blade and a winding layer varies depending on the circumferential location of the coil, radial location of the winding layer and conductor cross section of the winding layer, which already requires a multiplicity of different, individually calculated compensating blades for a single coil dimensioning; For different coil dimensions, the required variants of compensating blades multiply.
  • the invention has for its object to overcome the disadvantages of the known solutions and to provide a simplified winding position slope compensation for air throttle coils.
  • the invention thus provides a modular plug-in system for constructing a winding layer pitch compensation of only a few variable parts, on the one hand compensating leaves and on the other hand star blades, which are form-fitting nestable by their slots, the slot depth in the star leaves the Vorkragung, ie defined effective compensation height of the compensating blades.
  • the compensating blades can thereby all be designed uniformly, possibly with different thicknesses according to the conductor cross-section as explained in more detail later, and thus very easily manufactured and stored in a few variants.
  • the slot depths of the star leaves can be easily precalculated and then the slots are made in the appropriate depths, which is a relatively simple final step and can be made for example on a uniform type of unslotted star blade blanks.
  • a mechanically high-strength in its dimensions and compensation options extremely variable system, which greatly facilitates both the production and the storage of the winding layer pitch compensation.
  • star blades may be used which have only a single receiving slot, wherein the slot depths of the receiving slots may then be different within the star blade set between different star blades.
  • each star blade has at least two spaced-apart, emanating from the edge receiving slots whose slot depths are different, so that different effective compensation heights for different layers can be created at each individual star blade.
  • the star blades are made of metal and the receiving slots are milled therein.
  • this satisfies the requirements of the high strength of the star blades, which have to bear the great weight of the winding layers, and on the other hand, this enables extremely rapid and high-precision finishing of the star blade blanks, e.g. by CNC milling in the desired slot depths.
  • the compensating blades together with their insertion slots made of plastic or molded are cut.
  • the compensating blades can thus simultaneously perform an isolator function and - once apart from different thicknesses for different conductor cross-sections - are made substantially uniform, for example by preforming the plastic.
  • GRP glass fiber reinforced plastic
  • the slots can also be formed by cutting, which can be carried out with a uniform slot depth and thus low manufacturing requirements, eg manually with a single template.
  • the slot widths of at least two receiving slots of a star blade are preferably different and the compensating blades preferably have correspondingly adapted different thicknesses in order to be able to support winding layers with different conductor cross sections.
  • a plurality of star leaves may be welded at their one ends into a star, so that they form stop stars.
  • the star leaves are preferably carried out as so-called "star leaf stubs", i.
  • the star blades in their installed position do not reach the central air space of the air throttle coil in order to save material and weight.
  • the star leaves have anchorages for spacer strips or tension bandages extending between the winding layers, e.g. Holes for screwing or hanging such elements.
  • Fig. 1 comprises an air throttle coil 1, for example for high voltage power grids, four concentric winding layers 2, 3, 4, 5, which are spaced from each other by a plurality of circumferentially spaced spacer strips 6 to form cooling air gaps 7 between each other.
  • Each of the winding layers 2 - 5 is formed from a plurality in the axial direction 8 of the air throttle coil 1 superimposed turns of a conductor 9, such as a wire, wire strand or wire rope, and reached - depending on the conductor cross-section diameter D and number of turns - an individual winding layer height h 2 - h 5 (only h 5 of the outer layer 5 shown).
  • the winding layers 2 - 5 are held together at their upper and lower axial ends 10, 11 of multi-armed support rods 12, 13, which are stretched over tension bands 14 and / or the spacer strips 6 against each other.
  • Each holding star 12, 13 is composed of a plurality of radially arranged star blades 15, which in Fig. 1 are shown in two embodiments: In the embodiment shown by dashed lines of extension of Fig. 1 The star blades 15 extend to the middle of the central air space 16 of the air throttle coil 1 and are there at their ends 17 together - possibly with the formation of a hub - welded to the holding star 12, 13.
  • star leaves 15 are shortened to "star leaf stubs", which are only in the area below or above the winding layers 2 - 5 are arranged so that they no longer reach into the central air space 16 of the air throttle coil 1.
  • Each star blade 15 is strip-shaped, for example in the form of an approximately rectangular plate, and provided along a longitudinal edge 19 with a number of the longitudinal edge 19 receiving slots 20.
  • the number of receiving slots 20 corresponds to the number of winding layers 2 - 5, for which the star blade 15 is determined.
  • Each compensating blade 18 in turn is strip-shaped, for example in the form of an approximately rectangular plate, and (at least) provided with an insertion slot 22 extending from an edge 21.
  • each receiving slot 20 of a star blade 15 is now a compensating blade 18 form-fitting inserted so that at the same time the star blade 15 engages positively in the insertion slot 22 of the compensating blade 18, as in Fig. 2 shown.
  • the compensating blades 18 are thus approximately normal, ie transversely, placed on or in the star blades 15.
  • the slot widths B S of the receiving slots 20 of the star blades 15 respectively correspond to the thicknesses D A of the compensating blades 18 received therein, and vice versa, the slot widths B A of the slots 22 of the compensating blades 18 correspond to the thicknesses D S of the respective star blades 15 inserted therein.
  • the star blades 15 preferably have a uniform thickness D S , and accordingly, the slot widths B A of the insertion slots 22 are uniformly the same.
  • the slot depths T A of the insertion slots 22 of the compensating blades 18 are preferably (although not necessarily) uniform.
  • the slot depths T S of the various receiving slots 20 of a star blade 15 are each different, ie at least two slot depths T S of two receiving slots 20 are different from each other.
  • the compensating blades 18 penetrate at different depths into a star blade 15 and thus produce different effective compensation heights ah 2 , ah 3 , ah 4 , ah 5 (in FIG Fig. 2 only ah 5 for the outermost layer 5 shown) between a star blade 15 and a winding layer 2-5.
  • Distributed over the circumference of the air throttle coil 1 star blades 15 also have each increasing or decreasing slot depths T S to the rise of the conductor 9 a winding layer 2 - 5 in the course of the first or last turn to record.
  • the star blades 15 are preferably made of metal, in particular an aluminum alloy, and the receiving slots 20 therein are preferably made by milling, for example, CNC milling.
  • the compensating blades 18 are preferably made of plastic for the purpose of insulation, eg GRP (glass fiber reinforced plastic).
  • the insertion slots 22 in the compensating blades 18 can be mitausgeformt in the plastic production of the compensating blades 18 or subsequently cut into it, stamped, milled, etc. Since here usually only a uniform slot depth T A and a uniform slot width B A are required, the cutting of the insertion slots 22 can also be done manually, for example by means of a single template.
  • the star blades 15 may be provided with additional anchors for the spacer strips 6, for example, a plurality of holes 23, with which the spacer strips 6 can be screwed.
  • the star blades 15 can be used for example in holder 25, which are distributed on the turntable of a winding machine distributed over the circumference, and then the compensating blades 18 - or initially only the radially innermost compensating blade 18 - plugged.
  • a set of spacer strips 6 is distributed over the circumference and bolted to the star blades 18, then the next leveling blades 18 are plugged (if not done yet) on the star blades 15, then the next winding layer. 3 wound, etc., etc.
  • the star blades 15 may each have only a single receiving slot 20, in which case the receiving slots 20 different star blades 15 in a set of star blades may have different slot depths T S to the increase of the conductor. 9 to absorb over the circumference of the air throttle coil 1.

Description

Die vorliegende Erfindung betrifft einen Wicklungslagen-Steigungsausgleich für eine Luftdrosselspule, die zumindest zwei konzentrische, voneinander radial beabstandete Wicklungslagen hat.The present invention relates to a winding layer pitch compensation for an air throttle coil having at least two concentric, radially spaced winding layers.

Luftdrosselspulen wie zum Beispiel bekannt aus WO2009/126977 , werden in Energieversorgungsnetzen verwendet und sind - im Gegensatz zu ölisolierten Spulen - "trockenisolierte" Drosselspulen, bei welchen die Isolation durch Feststoffisolation und ausreichende Luft- und Kriechstrecken bewerkstelligt wird und welche in der Regel auch keinen ferromagnetischen Kern enthalten, d.h. deren zentraler Luftraum frei ist.Air throttle coils such as known from WO2009 / 126977 , are used in energy supply networks and are - in contrast to oil-insulated coils - "dry-insulated" inductors, in which the insulation is accomplished by solid insulation and sufficient creepage and clearance and which usually also contain no ferromagnetic core, ie their central air space is free ,

Die konzentrischen Wicklungslagen der Luftdrosselspule werden an ihren oberen und unteren axialen Enden jeweils von einem Haltestern gehalten, der sich aus mehreren sternförmig radial angeordneten Armen, sog. Sternblättern, zusammensetzt. Anstelle eines einteiligen Haltesterns kann jeweils auch eine Vielzahl einzelner Sternblätter verwendet werden, die nur im Bereich unter und über den Wicklungslagen liegen, um Sternblattmaterial einzusparen. Die einander gegenüberliegenden Haltesterne bzw. Sternblätter werden dabei mithilfe von zwischen den Wicklungslagen verlaufenden Abstandshalteleisten oder Zugbandagen gegeneinander gespannt, um die Wicklungslagen zu halten. Beim Wickeln der Spule werden die Sternblätter und Abstandshalteleisten gleichzeitig als Wickelhilfen verwendet, indem zunächst die unteren Sternblätter auf einer Drehvorrichtung aufgespannt und dann darauf die Wicklungslagen aufgebaut werden, wobei dazwischen jeweils ein Satz Abstandshalteleisten montiert wird.The concentric winding layers of the air throttle coil are each held at their upper and lower axial ends by a holding star, which is composed of a plurality of star-shaped radially arranged arms, so-called star blades. Instead of a one-piece holding star, it is also possible in each case to use a large number of individual star leaves, which lie only in the area below and above the winding layers in order to save star-blade material. The opposing holding stars or star blades are biased against each other by means of running between the winding layers spacer strips or Zugbandagen to hold the winding layers. When winding the coil, the star blades and spacer strips are used simultaneously as a winding aids by first spanned the lower star blades on a rotating device and then the winding layers are built thereon, with a set of spacer strips is mounted therebetween.

Aufgrund von unterschiedlichen Leiterquerschnitten in den einzelnen Wicklungslagen ergeben sich dabei unterschiedliche Steigungen und/oder axiale Bauhöhen der einzelnen Wicklungslagen, welche einen Wicklungslagen-Steigungsausgleich erfordern: Zwischen den einander axial gegenüberliegenden Sternblättern und der zwischenliegenden Wicklungslage werden Ausgleichsblätter eingelegt, welche die Wicklungslagen gegenüber den Sternblättern abstützen und in Axialrichtung zentrieren.Due to different conductor cross sections in the individual winding layers, this results in different pitches and / or axial heights of the individual winding layers, which require a winding layer pitch compensation: between the mutually axially opposed star blades and the intermediate winding layer compensation sheets are inserted, which support the winding layers against the star leaves and center in the axial direction.

Die derzeit bekannten Ausgleichsblätter sind relativ komplexe Teile, da die zwischen einem Sternblatt und einer Wicklungslage auszugleichende Höhe je nach Umfangsort der Spule, Radialort der Wicklungslage und Leiterquerschnitt der Wicklungslage variiert, was bereits für eine einzige Spulendimensionierung eine Vielzahl unterschiedlicher, individuell berechneter Ausgleichsblätter erfordert; für verschiedene Spulendimensionierungen multiplizieren sich die erforderlichen Varianten an Ausgleichsblättern.The currently known compensating blades are relatively complex parts, since the height to be compensated between a star blade and a winding layer varies depending on the circumferential location of the coil, radial location of the winding layer and conductor cross section of the winding layer, which already requires a multiplicity of different, individually calculated compensating blades for a single coil dimensioning; For different coil dimensions, the required variants of compensating blades multiply.

Die Erfindung setzt sich zum Ziel, die Nachteile der bekannten Lösungen zu überwinden und einen vereinfachten Wicklungslagen-Steigungsausgleich für Luftdrosselspulen zu schaffen.The invention has for its object to overcome the disadvantages of the known solutions and to provide a simplified winding position slope compensation for air throttle coils.

Dieses Ziel wird erfindungsgemäß erreicht durch die Kombination aus:

  • einem ersten Satz streifenförmiger Sternblätter, welche jeweils zur radialen Anordnung unter oder über den Wicklungslagen bestimmt und entlang einer Kante mit zumindest einem von der Kante ausgehenden Aufnahmeschlitz versehen sind,
  • einem zweiten Satz streifenförmiger Ausgleichsblätter, welche jeweils entlang einer Kante mit zumindest einem von der Kante ausgehenden Einsteckschlitz versehen sind,
  • wobei in jeden Aufnahmeschlitz eines Sternblattes ein Ausgleichsblatt formschlüssig einsteckbar ist und das Sternblatt dabei in dessen Einsteckschlitz formschlüssig eingreift, und
  • wobei die Schlitztiefen zumindest zweier Aufnahmeschlitze des Satzes von Sternblättern unterschiedlich sind.
This object is achieved according to the invention by the combination of:
  • a first set of strip-shaped star blades which are each intended for radial arrangement under or over the winding layers and are provided along one edge with at least one receiving slot extending from the edge,
  • a second set of strip-shaped compensating blades, each of which is provided along one edge with at least one slot extending from the edge,
  • wherein in each receiving slot of a star blade a compensating blade is positively inserted and the star blade engages positively in the insertion slot, and
  • wherein the slot depths of at least two receiving slots of the set of star blades are different.

Die Erfindung schafft damit ein modulares Stecksystem zum Aufbau eines Wicklungslagen-Steigungsausgleichs aus nur wenigen variablen Teilen, und zwar einerseits Ausgleichsblättern und andererseits Sternblättern, die anhand ihrer Schlitze formschlüssig ineinandersteckbar sind, wobei die Schlitztiefe in den Sternblättern die Vorkragung, d.h. wirksame Ausgleichshöhe der Ausgleichsblätter definiert. Die Ausgleichsblätter können dadurch alle einheitlich gestaltet werden, allenfalls mit unterschiedlichen Dicken entsprechend den Leiterquerschnitt wie später noch näher erläutert, und damit sehr einfach in wenigen Variante gefertigt und bevorratet werden. Die Schlitztiefen der Sternblätter können einfach vorberechnet und dann die Schlitze in den entsprechenden Tiefen gefertigt werden, was einen vergleichsweise einfachen Endfertigungsschritt darstellt und beispielsweise an einer einheitlichen Type von ungeschlitzten Sternblatt-Rohlingen vorgenommen werden kann. In Summe ergibt sich ein mechanisch hochfestes, in seinen Dimensionierungen und Ausgleichsmöglichkeiten extrem variables System, das sowohl die Fertigung als auch die Bevorratung des Wicklungslagen-Steigungsausgleichs sehr erleichtert.The invention thus provides a modular plug-in system for constructing a winding layer pitch compensation of only a few variable parts, on the one hand compensating leaves and on the other hand star blades, which are form-fitting nestable by their slots, the slot depth in the star leaves the Vorkragung, ie defined effective compensation height of the compensating blades. The compensating blades can thereby all be designed uniformly, possibly with different thicknesses according to the conductor cross-section as explained in more detail later, and thus very easily manufactured and stored in a few variants. The slot depths of the star leaves can be easily precalculated and then the slots are made in the appropriate depths, which is a relatively simple final step and can be made for example on a uniform type of unslotted star blade blanks. In sum, a mechanically high-strength, in its dimensions and compensation options extremely variable system, which greatly facilitates both the production and the storage of the winding layer pitch compensation.

Für einlagige Drosselspulen können Sternblätter verwendet werden, welche nur einen einzigen Aufnahmeschlitz haben, wobei die Schlitztiefen der Aufnahmeschlitze dann innerhalb des Sternblattsatzes zwischen verschiedenen Sternblättern unterschiedlich sein können. Für mehrlagige Drosselspulen ist es besonders vorteilhaft, wenn jedes Sternblatt zumindest zwei voneinander beabstandete, von der Kante ausgehende Aufnahmeschlitze hat, deren Schlitztiefen unterschiedlich sind, so dass unterschiedliche wirksame Ausgleichshöhen für verschiedene Lagen bei jedem einzelnen Sternblatt geschaffen werden können.For single-layer inductors, star blades may be used which have only a single receiving slot, wherein the slot depths of the receiving slots may then be different within the star blade set between different star blades. For multilayer inductors, it is particularly advantageous if each star blade has at least two spaced-apart, emanating from the edge receiving slots whose slot depths are different, so that different effective compensation heights for different layers can be created at each individual star blade.

Gemäß einer bevorzugten Ausführungsform der Erfindung sind die Sternblätter aus Metall gefertigt und die Aufnahmeschlitze darin eingefräst. Dies erfüllt einerseits die Anforderungen an die hohe Festigkeit der Sternblätter, welche das große Gewicht der Wicklungslagen tragen müssen, und andererseits ermöglicht dies eine überaus rasche und hochpräzise Endfertigung der Sternblatt-Rohlinge z.B. durch CNC-Fräsen in den gewünschten Schlitztiefen.According to a preferred embodiment of the invention, the star blades are made of metal and the receiving slots are milled therein. On the one hand, this satisfies the requirements of the high strength of the star blades, which have to bear the great weight of the winding layers, and on the other hand, this enables extremely rapid and high-precision finishing of the star blade blanks, e.g. by CNC milling in the desired slot depths.

Weiters ist es besonders günstig, wenn die Ausgleichsblätter mitsamt ihren Einsteckschlitzen aus Kunststoff geformt oder geschnitten sind. Die Ausgleichsblätter können so gleichzeitig eine Isolatorfunktion ausüben und - einmal abgesehen von unterschiedlichen Dicken für unterschiedliche Leiterquerschnitte - im Wesentlichen einheitlich gefertigt werden, z.B. durch Vorformen des Kunststoffs. Wenn als Kunststoff GFK (glasfaserverstärkter Kunststoff) verwendet wird, können die Schlitze auch durch Einschneiden gebildet werden, was mit einer einheitlichen Schlitztiefe und damit geringen Fertigungsanforderungen, z.B. manuell mit einer einzigen Schablone, durchgeführt werden kann.Furthermore, it is particularly advantageous if the compensating blades, together with their insertion slots made of plastic or molded are cut. The compensating blades can thus simultaneously perform an isolator function and - once apart from different thicknesses for different conductor cross-sections - are made substantially uniform, for example by preforming the plastic. If GRP (glass fiber reinforced plastic) is used as plastic, the slots can also be formed by cutting, which can be carried out with a uniform slot depth and thus low manufacturing requirements, eg manually with a single template.

Wie bereits kurz angesprochen sind die Schlitzbreiten zumindest zweier Aufnahmeschlitze eines Sternblattes bevorzugt unterschiedlich und die Ausgleichsblätter haben bevorzugt entsprechend angepasste unterschiedliche Dicken, um Wicklungslagen mit unterschiedlichen Leiterquerschnitten abstützen zu können.As already briefly mentioned, the slot widths of at least two receiving slots of a star blade are preferably different and the compensating blades preferably have correspondingly adapted different thicknesses in order to be able to support winding layers with different conductor cross sections.

In einer ersten Ausführungsform der Erfindung können mehrere Sternblätter an ihren einen Enden zu einem Stern verschweißt werden, sodass sie Haltesterne bilden. Alternativ werden die Sternblätter bevorzugt als sog. "Sternblattstummel" ausgeführt, d.h. die Sternblätter reichen in ihrer Einbaustellung nicht in den zentralen Luftraum der Luftdrosselspule, um Material und Gewicht zu sparen.In a first embodiment of the invention, a plurality of star leaves may be welded at their one ends into a star, so that they form stop stars. Alternatively, the star leaves are preferably carried out as so-called "star leaf stubs", i. The star blades in their installed position do not reach the central air space of the air throttle coil in order to save material and weight.

In jedem Fall ist es besonders günstig, wenn gemäß einem weiteren Merkmal der Erfindung die Sternblätter Verankerungen für zwischen den Wicklungslagen verlaufende Abstandshalteleisten oder Zugbandagen aufweisen, z.B. Bohrungen für das Anschrauben oder Einhängen derartiger Elemente.In any case, it is particularly favorable if, according to a further feature of the invention, the star leaves have anchorages for spacer strips or tension bandages extending between the winding layers, e.g. Holes for screwing or hanging such elements.

Die Erfindung wird nachstehend anhand eines in den beigeschlossenen Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. In den Zeichnungen zeigt:

  • Fig. 1 eine Luftdrosselspule mit zwei verschiedenen Ausführungsformen (eine davon strichliert angedeutet) eines Wicklungslagen-Steigungsausgleichs gemäß der Erfindung in einer Perspektivansicht;
  • Fig. 2 eines der Sternblätter des Wicklungslagen-Steigungsausgleichs von Fig. 1 mit eingesteckten Ausgleichsblättern in einer Perspektivansicht im Detail; und
  • die Fig. 3 und 4 ein Sternblatt und ein Ausgleichsblatt jeweils in einer Perspektivansicht im Detail.
The invention will be explained in more detail with reference to an embodiment shown in the accompanying drawings. In the drawings shows:
  • Fig. 1 an air throttle coil with two different embodiments (one indicated by dashed lines) of a winding layer pitch compensation according to the invention in a perspective view;
  • Fig. 2 one of the star blades of the winding layer pitch compensation of Fig. 1 with inserted compensating blades in a perspective view in detail; and
  • the 3 and 4 a star leaf and a leveling sheet each in a perspective view in detail.

Gemäß Fig. 1 umfasst eine Luftdrosselspule 1, z.B. für Hochspannungs-Energieversorgungsnetze, vier konzentrische Wicklungslagen 2, 3, 4, 5, welche durch eine Vielzahl umfangsmäßig verteilter Abstandshalteleisten 6 voneinander beabstandet sind, um zwischeneinander Kühlluftspalte 7 zu bilden. Jede der Wicklungslagen 2 - 5 ist dabei aus einer Vielzahl in Axialrichtung 8 der Luftdrosselspule 1 übereinanderliegenden Windungen eines Leiters 9, wie eines Drahtes, Drahtstranges oder Drahtseiles, gebildet und erreicht - je nach Leiterquerschnitt-Durchmesser D und Windungszahl - eine individuelle Wicklungslagen-Bauhöhe h2 - h5 (nur h5 der äußeren Lage 5 dargestellt).According to Fig. 1 comprises an air throttle coil 1, for example for high voltage power grids, four concentric winding layers 2, 3, 4, 5, which are spaced from each other by a plurality of circumferentially spaced spacer strips 6 to form cooling air gaps 7 between each other. Each of the winding layers 2 - 5 is formed from a plurality in the axial direction 8 of the air throttle coil 1 superimposed turns of a conductor 9, such as a wire, wire strand or wire rope, and reached - depending on the conductor cross-section diameter D and number of turns - an individual winding layer height h 2 - h 5 (only h 5 of the outer layer 5 shown).

Die Wicklungslagen 2 - 5 werden an ihren oberen und unteren axialen Enden 10, 11 von mehrarmigen Haltesternen 12, 13 zusammengehalten, die über Spannbänder 14 und/oder die Abstandshalteleisten 6 gegeneinander gespannt sind. Jeder Haltestern 12, 13 setzt sich dabei aus einer Mehrzahl radial angeordneter Sternblätter 15 zusammen, welche in Fig. 1 in zwei Ausführungsformen gezeigt sind: In der mit strichlierten Verlängerungslinien gezeigten Ausführungsform von Fig. 1 verlaufen die Sternblätter 15 bis in die Mitte des zentralen Luftraums 16 der Luftdrosselspule 1 und sind dort an ihren Enden 17 miteinander - gegebenenfalls unter Ausbildung einer Nabe - zum Haltestern 12, 13 verschweißt.The winding layers 2 - 5 are held together at their upper and lower axial ends 10, 11 of multi-armed support rods 12, 13, which are stretched over tension bands 14 and / or the spacer strips 6 against each other. Each holding star 12, 13 is composed of a plurality of radially arranged star blades 15, which in Fig. 1 are shown in two embodiments: In the embodiment shown by dashed lines of extension of Fig. 1 The star blades 15 extend to the middle of the central air space 16 of the air throttle coil 1 and are there at their ends 17 together - possibly with the formation of a hub - welded to the holding star 12, 13.

In der in Fig. 1 mit ausgezogenen Linien dargestellten Ausführung sind die Sternblätter 15 zu "Sternblattstummeln" verkürzt, welche nur mehr im Bereich unter bzw. über den Wicklungslagen 2 - 5 angeordnet sind, sodass sie nicht mehr in den zentralen Luftraum 16 der Luftdrosselspule 1 reichen.In the in Fig. 1 shown in solid lines, the star leaves 15 are shortened to "star leaf stubs", which are only in the area below or above the winding layers 2 - 5 are arranged so that they no longer reach into the central air space 16 of the air throttle coil 1.

Aufgrund der unterschiedlichen Bauhöhen h2 - h5 der verschiedenen Wicklungslagen 2 - 5 ist ein Wicklungslagen-Steigungsausgleich zwischen den Sternblättern 15 und den Wicklungslagen 2 - 5, genauer deren ersten und letzten Windungen des Leiters 9, erforderlich, um jede Wicklungslage 2 - 5 kraftschlüssig zwischen den jeweils axial einander gegenüberliegenden Sternblättern 15 zu halten. Dazu dienen eine Vielzahl einzelner, jeweils zwischen einem Sternblatt 15 und einer Wicklungslage 2 - 5 angeordneter Ausgleichsblätter 18, deren Zusammenwirken mit den Sternblättern 15 anhand der Fig. 2 - 4 näher erläutert wird.Due to the different heights h 2 - h 5 of the different winding layers 2 - 5 is a winding position slope compensation between the star blades 15 and the winding layers 2 - 5, more precisely their first and last turns of the conductor 9, required to hold each winding layer 2 - 5 frictionally between the respective axially opposite star blades 15. Serve a variety of individual, each between a star blade 15 and a winding layer 2 - 5 arranged compensating blades 18, their interaction with the star blades 15 on the basis of Fig. 2-4 is explained in more detail.

Gemäß den Fig. 2 - 4 ist jedes Sternblatt 15 streifenförmig, z.B. in Form eines etwa rechteckigen Plättchens, und entlang einer Längskante 19 mit einer Anzahl von der Längskante 19 ausgehender Aufnahmeschlitze 20 versehen. Die Anzahl der Aufnahmeschlitze 20 entspricht der Anzahl an Wicklungslagen 2 - 5, für welche das Sternblatt 15 bestimmt ist. Jedes Ausgleichsblatt 18 ist seinerseits streifenförmig, z.B. in Form eines etwa rechteckigen Plättchens, und mit (zumindest) einem von einer Kante 21 ausgehenden Einsteckschlitz 22 versehen.According to the Fig. 2-4 Each star blade 15 is strip-shaped, for example in the form of an approximately rectangular plate, and provided along a longitudinal edge 19 with a number of the longitudinal edge 19 receiving slots 20. The number of receiving slots 20 corresponds to the number of winding layers 2 - 5, for which the star blade 15 is determined. Each compensating blade 18 in turn is strip-shaped, for example in the form of an approximately rectangular plate, and (at least) provided with an insertion slot 22 extending from an edge 21.

In jeden Aufnahmeschlitz 20 eines Sternblattes 15 ist nun ein Ausgleichsblatt 18 formschlüssig so einsteckbar, dass gleichzeitig das Sternblatt 15 in den Einsteckschlitz 22 des Ausgleichsblatts 18 formschlüssig eingreift, wie in Fig. 2 gezeigt. Die Ausgleichsblätter 18 sind damit etwa normal, d.h. quer, auf bzw. in die Sternblätter 15 gesteckt. Die Schlitzbreiten BS der Aufnahmeschlitze 20 der Sternblätter 15 entsprechen dabei jeweils den Dicken DA der darin aufgenommenen Ausgleichsblätter 18, und umgekehrt entsprechend die Schlitzbreiten BA der Schlitze 22 der Ausgleichsblätter 18 den Dicken DS der jeweils darin eingesteckten Sternblätter 15.In each receiving slot 20 of a star blade 15 is now a compensating blade 18 form-fitting inserted so that at the same time the star blade 15 engages positively in the insertion slot 22 of the compensating blade 18, as in Fig. 2 shown. The compensating blades 18 are thus approximately normal, ie transversely, placed on or in the star blades 15. The slot widths B S of the receiving slots 20 of the star blades 15 respectively correspond to the thicknesses D A of the compensating blades 18 received therein, and vice versa, the slot widths B A of the slots 22 of the compensating blades 18 correspond to the thicknesses D S of the respective star blades 15 inserted therein.

Die Sternblätter 15 haben bevorzugt eine einheitliche Dicke DS, und dementsprechend sind auch die Schlitzbreiten BA der Einsteckschlitze 22 einheitlich gleich. Die Ausgleichsblätter 18 haben hingegen in der Regel unterschiedliche Dicken DA, und zwar je nach dem Leiterquerschnitt-Durchmesser D der abzustützenden Wicklungslage 2 - 5. Dementsprechend sind auch die Schlitzbreiten BS der Aufnahmeschlitze 20 der Sternblätter 15 unterschiedlich und an die Dicke DA des jeweils aufzunehmenden Ausgleichsblatts 18 angepasst.The star blades 15 preferably have a uniform thickness D S , and accordingly, the slot widths B A of the insertion slots 22 are uniformly the same. The compensating blades 18, however, usually have different thicknesses D A , depending on the conductor cross-section diameter D to be supported winding layer 2-5. Accordingly, the Slot widths 15 varied and adjusted B S of the receiving slots 20 of the star sheets to the thickness D A of the respective male compensation sheet eighteenth

Die Schlitztiefen TA der Einsteckschlitze 22 der Ausgleichsblätter 18 sind bevorzugt (wenn auch nicht notwendigerweise) einheitlich. Hingegen sind die Schlitztiefen TS der verschiedenen Aufnahmeschlitze 20 eines Sternblattes 15 jeweils unterschiedlich, d.h. zumindest zwei Schlitztiefen TS zweier Aufnahmeschlitze 20 sind von einander verschieden. Dadurch dringen die Ausgleichsblätter 18 unterschiedlich tief in ein Sternblatt 15 ein und erzeugen so unterschiedliche wirksame Ausgleichshöhen ah2, ah3, ah4, ah5 (in Fig. 2 nur ah5 für die äußerste Lage 5 dargestellt) zwischen einem Sternblatt 15 und einer Wicklungslage 2 - 5. Über den Umfang der Luftdrosselspule 1 verteilte Sternblätter 15 haben dabei auch jeweils zunehmende bzw. abnehmende Schlitztiefen TS, um das Ansteigen des Leiters 9 einer Wicklungslage 2 - 5 im Zuge der ersten bzw. letzten Windung aufzunehmen.The slot depths T A of the insertion slots 22 of the compensating blades 18 are preferably (although not necessarily) uniform. By contrast, the slot depths T S of the various receiving slots 20 of a star blade 15 are each different, ie at least two slot depths T S of two receiving slots 20 are different from each other. As a result, the compensating blades 18 penetrate at different depths into a star blade 15 and thus produce different effective compensation heights ah 2 , ah 3 , ah 4 , ah 5 (in FIG Fig. 2 only ah 5 for the outermost layer 5 shown) between a star blade 15 and a winding layer 2-5. Distributed over the circumference of the air throttle coil 1 star blades 15 also have each increasing or decreasing slot depths T S to the rise of the conductor 9 a winding layer 2 - 5 in the course of the first or last turn to record.

Die Sternblätter 15 sind bevorzugt aus Metall, insbesondere einer Aluminiumlegierung, ausgeführt und die Aufnahmeschlitze 20 darin werden bevorzugt durch Fräsen, z.B. CNC-Fräsen, gefertigt. Die Ausgleichsblätter 18 sind zwecks Isolation bevorzugt aus Kunststoff ausgeführt, z.B. GFK (glasfaserverstärktem Kunststoff). Die Einsteckschlitze 22 in den Ausgleichsblättern 18 können bei der Kunststofffertigung der Ausgleichsblätter 18 mitausgeformt oder nachträglich darin eingeschnitten, eingestanzt, gefräst usw. werden. Da hier in der Regel nur eine einheitliche Schlitztiefe TA und eine einheitliche Schlitzbreite BA erforderlich sind, kann das Einschneiden der Einsteckschlitze 22 beispielsweise mithilfe einer einzigen Schablone auch manuell erfolgen.The star blades 15 are preferably made of metal, in particular an aluminum alloy, and the receiving slots 20 therein are preferably made by milling, for example, CNC milling. The compensating blades 18 are preferably made of plastic for the purpose of insulation, eg GRP (glass fiber reinforced plastic). The insertion slots 22 in the compensating blades 18 can be mitausgeformt in the plastic production of the compensating blades 18 or subsequently cut into it, stamped, milled, etc. Since here usually only a uniform slot depth T A and a uniform slot width B A are required, the cutting of the insertion slots 22 can also be done manually, for example by means of a single template.

Die Sternblätter 15 können mit zusätzlichen Verankerungen für die Abstandshalteleisten 6 ausgestattet werden, beispielsweise einer Mehrzahl von Bohrungen 23, mit welchen die Abstandshalteleisten 6 verschraubt werden können. Weitere Verankerungen, z.B. Bohrungen 24, können für zusätzliche Zugbandagen (Zugbänder) vorgesehen werden, mit welchen die einander axial gegenüberliegenden Sternblätter 15 zusätzlich verspannt werden können.The star blades 15 may be provided with additional anchors for the spacer strips 6, for example, a plurality of holes 23, with which the spacer strips 6 can be screwed. Other anchorages, For example, holes 24, can be provided for additional Zugbandagen (drawstrings), with which the axially opposite star blades 15 can be additionally braced.

Bei der Fertigung der Luftdrosselspule 1 können die Sternblätter 15 beispielsweise in Halter 25 eingesetzt werden, welche auf der Drehscheibe einer Wickelmaschine über den Umfang verteilt montiert werden, und dann werden die Ausgleichsblätter 18 - oder zunächst nur das radial innerstes Ausgleichsblatt 18 - aufgesteckt. Nach dem Wickeln der ersten, innersten Wicklungslage 2 wird ein Satz von Abstandshalteleisten 6 über den Umfang verteilt und mit den Sternblättern 18 verschraubt, dann werden die nächsten Ausgleichsblätter 18 (soferne noch nicht geschehen) auf die Sternblätter 15 aufgesteckt, dann wird die nächste Wicklungslage 3 gewickelt, usw. usf.In the manufacture of the air throttle coil 1, the star blades 15 can be used for example in holder 25, which are distributed on the turntable of a winding machine distributed over the circumference, and then the compensating blades 18 - or initially only the radially innermost compensating blade 18 - plugged. After winding the first, innermost winding layer 2, a set of spacer strips 6 is distributed over the circumference and bolted to the star blades 18, then the next leveling blades 18 are plugged (if not done yet) on the star blades 15, then the next winding layer. 3 wound, etc., etc.

Es versteht sich, dass in einfachen Ausführungsformen für einlagige Drosselspulen die Sternblätter 15 jeweils auch nur einen einzigen Aufnahmeschlitz 20 haben können, wobei dann die Aufnahmeschlitze 20 unterschiedlicher Sternblätter 15 in einem Satz von Sternblättern verschiedene Schlitztiefen TS haben können, um das Ansteigen des Leiters 9 über den Umfang der Luftdrosselspule 1 aufzunehmen.It is understood that in simple embodiments for single-layer inductors, the star blades 15 may each have only a single receiving slot 20, in which case the receiving slots 20 different star blades 15 in a set of star blades may have different slot depths T S to the increase of the conductor. 9 to absorb over the circumference of the air throttle coil 1.

Die Erfindung ist nicht auf die dargestellten Ausführungsformen beschränkt, sondern umfasst alle Varianten und Modifikationen, die in den Rahmen der angeschlossenen Ansprüche fallen.The invention is not limited to the illustrated embodiments, but includes all variants and modifications that fall within the scope of the appended claims.

Claims (8)

  1. Winding layer pitch compensation for an air-core reactor (1), which has at least two concentric winding layers (2 - 5) spaced apart radially from one another, characterised by the combination of
    a first set of strip-shaped star sheets (15), which are each intended for a radial arrangement below and above the winding layers (2 - 5) and are provided along one edge (19) with at least one receiving slot (20) emanating from the edge (19),
    a second set of strip-shaped compensation sheets (18), which are each provided along one edge (21) with at least one insert slot (22) emanating from the edge,
    wherein a compensation sheet (18) is able to be inserted in a form fit into each receiving slot (20) of a star sheet (15) and the star sheet (15) in this case engages in a form fit into its insert slot (22), and
    wherein the slot depths (TS) of at least two receiving slots (20) of the set of star sheets (15) are different.
  2. Winding layer pitch compensation according to claim 1, characterised in that each star sheet (15) has at least two receiving slots (20) spaced apart from one another, emanating from the edge (19), of which the slot depths (TS) are different.
  3. Winding layer pitch compensation according to claim 1 or 2, characterised in that the star sheets (15) are made of metal and the receiving slots (20) are milled into said sheets.
  4. Winding layer pitch compensation according to one of claims 1 to 3, characterised in that the compensation sheets (18) along with their insert slots (22) are moulded or cut from plastic.
  5. Winding layer pitch compensation according to one of claims 1 to 4, characterised in that the slot widths (BS) of at least two receiving slots (20) of a star sheet (15) are different and the compensation sheets (18) have correspondingly adapted different thicknesses (DA).
  6. Winding layer pitch compensation according to one of claims 1 to 5, characterised in that a number of star sheets (15) are welded at one of their ends (17) to form a star.
  7. Winding layer pitch compensation according to one of claims 1 to 5, characterised in that, in the installed state, the star sheets (15) do not reach into the central air space (16) of the air-core reactor (1).
  8. Winding layer pitch compensation according to one of claims 1 to 7, characterised in that the star sheets (15) have anchorages (23, 24) for spacer strips (6) or tensioning bandages running between the winding layers.
EP14707078.3A 2013-03-15 2014-01-14 Winding layer pitch compensation for an air-core reactor Active EP2973621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50179/2013A AT514282B1 (en) 2013-03-15 2013-03-15 Winding layer pitch compensation for an air throttle coil
PCT/AT2014/050009 WO2014138762A1 (en) 2013-03-15 2014-01-14 Winding layer pitch compensation for an air-core reactor

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EP2973621A1 EP2973621A1 (en) 2016-01-20
EP2973621B1 true EP2973621B1 (en) 2017-03-29

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EP (1) EP2973621B1 (en)
CN (1) CN105027233B (en)
AT (1) AT514282B1 (en)
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CA (1) CA2902589C (en)
WO (1) WO2014138762A1 (en)

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WO2021058229A1 (en) 2019-09-23 2021-04-01 Siemens Energy Global GmbH & Co. KG Compensation block for air-core inductors and transformers

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AT521480B1 (en) * 2018-08-06 2020-02-15 Coil Holding Gmbh Coil arrangement with a support arrangement
EP4222762A1 (en) * 2020-10-20 2023-08-09 Siemens Energy Global GmbH & Co. KG Structural arrangement for attachment of conductor winding packages in air core reactor
EP4222763B1 (en) * 2020-11-12 2024-04-10 Siemens Energy Global GmbH & Co. KG Structural arrangement for mounting conductor winding packages in air core reactor

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BR112015021881A2 (en) 2017-07-18
AT514282B1 (en) 2015-10-15
EP2973621A1 (en) 2016-01-20
CA2902589A1 (en) 2014-09-18
US10777348B2 (en) 2020-09-15
WO2014138762A1 (en) 2014-09-18
AT514282A1 (en) 2014-11-15
BR112015021881B1 (en) 2021-02-17
CN105027233B (en) 2018-07-17
CN105027233A (en) 2015-11-04
CA2902589C (en) 2021-11-16
US20160005529A1 (en) 2016-01-07

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