EP0582218A1 - Choke coil for a converter - Google Patents

Choke coil for a converter Download PDF

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Publication number
EP0582218A1
EP0582218A1 EP93112152A EP93112152A EP0582218A1 EP 0582218 A1 EP0582218 A1 EP 0582218A1 EP 93112152 A EP93112152 A EP 93112152A EP 93112152 A EP93112152 A EP 93112152A EP 0582218 A1 EP0582218 A1 EP 0582218A1
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EP
European Patent Office
Prior art keywords
winding
choke coil
cooling
coil according
carriers
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Application number
EP93112152A
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German (de)
French (fr)
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EP0582218B1 (en
Inventor
Wilhelm KRÄMER
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ABB Patent GmbH
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ABB Patent GmbH
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Publication of EP0582218A1 publication Critical patent/EP0582218A1/en
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/16—Water cooling

Definitions

  • the invention relates to a choke coil for a converter according to the preamble of claim 1.
  • Such a choke coil for a converter is known from DE 40 08 424 A1.
  • a choke coil for a converter with a choke winding wound on a cylindrical winding support is proposed, in which the winding support consists of at least two rod-shaped or tubular winding support sections, each of which is connected to one another via connecting parts.
  • the winding carrier sections each carrying the partial windings of the choke winding are arranged in such a way that the magnetic fields generated partially cancel or weaken one another.
  • this choke coil is not suitable for liquid cooling.
  • a water-cooled choke coil embedded in casting resin (potting compound) for converter systems is known from DE 37 43 222 C2.
  • the coil is in an annular container Arranged and sealed from non-magnetic material, with materially attached grommets are provided on the container lid for carrying out the electrical supply lines, and the space between the coil and the container wall is filled with the sealing compound for support and as a thermal bridge.
  • the coil is arranged with its container in a boiler through which the cooling water flows, wherein water gaps are arranged in spaces between the annular container and magnetic parts of the choke coil or between the latter, the boiler and a packing element arranged therein such that they provide a helical guide for the cooling water around the Create an annular container.
  • the invention has for its object to provide a choke coil for a converter of the type mentioned, which can be cooled with hot water and which emits only a small external magnetic field.
  • the inductor can be cooled efficiently and is of a very simple construction.
  • the choke coil which is constructed according to the toroid principle, is vibration-proof and robust and, moreover, very compact, which saves weight and space, which is particularly important for a rail vehicle when installing the choke coil in an encapsulated, water-cooled converter module. Because the magnetic fields emitted to the outside by the choke coil are very are low, only relatively small losses are generated in the metal housing walls of the converter module.
  • FIG. 1 shows a side section through a first variant of a choke coil.
  • Two tubular winding supports 1, 2 arranged in parallel and directly next to one another can be seen, which serve on the one hand for the application of the winding 3 and on the other hand as a heat sink for the internal cooling of the choke.
  • the winding carriers 1, 2 consist, for example, of a thin-walled plastic tube with a high mechanical strength, long-term very good insulation properties and a sufficiently good thermal conductivity.
  • a GRP pipe with cast resin or a polyamide pipe is suitable. Variants are shown in Figures 3 and 4.
  • Each winding support 1 or 2 has an electrical connection side 1a or 2a at one end and a cooling connection side 1b or 2b at its other end.
  • the winding 3 consisting of two partial windings begins, for example on the electrical connection side 1a, extends helically to the cooling connection side 1b, changes from there to the cooling connection side 2b and continues helically to the electrical connection side 2a.
  • the winding strand winding around the individual winding carriers can consist of a large number of individual wires which are electrically insulated from one another, which reduces the electrical losses during operation of the inductor. In addition, however, it is also possible to form the winding in one piece as an aluminum casting.
  • a bandage 4 around the winding strand has a multiple function and is firstly an elastic buffering that prevents stress or shock cracks, secondly serves to decouple the winding heating to the outer casting 5 described in more detail below, and thirdly increases the mechanical strength.
  • the encapsulation 5, which is preferably formed from cast resin, envelops the winding 3 on its outwardly directed jacket and end faces and thus ensures the electrical insulation of the winding 3 from the outside. So that the temperatures at the non-cooled winding start 3a and winding end 3b do not rise to high values, there are provided large cross-sectional enlargements of the winding. This is taken into account by appropriate design of the end fittings 6 and 7 and solved structurally. In the case of a winding formed as an aluminum casting, the end fittings 6, 7, which are enlarged in cross section, can be cast simultaneously with the winding strand. To ensure the short-circuit strength, the end fittings 6, 7 are connected to the winding carriers 1, 2 via screw connections 8, 9.
  • the casting 5 holds the winding 3 and end fittings 6, 7 together.
  • the "shrinking force" of the casting 5 also ensures the pressure required for pressing the winding onto the winding carrier, which results in a good heat transfer from the winding to the winding carrier results.
  • a magnetic shielding cap 10a, 11a is arranged in each of the external spaces formed between the two winding carriers 1, 2. These magnetic shielding caps 10a, 11a reduce the edge-side magnetic fields emitted from the choke coil, so that only relatively small electrical losses are generated in the metal housing walls of a converter module surrounding the choke.
  • the magnetic shield caps 10a, 11a can, for example, be mounted (screwed) on webs 12a, 13a, which are part of the encapsulation 5 and additionally contribute to the short-circuit strength of the choke coil.
  • the choke coil has internal cooling using coolant - preferably process water.
  • the choke coil according to the first variant is mounted on a cooling rail 15 on the cooling connection side with the interposition of seals 14.
  • the cooling rail 15 has a coolant flow 16 and separate coolant returns 17a, 17b.
  • the coolant reaches the throttle coil via immersion tubes 18a, 18b (water guide tubes) connected to the coolant flow 16 and projecting deeply into the interior of the winding support 1 and flows through return openings 19a, 19b to the coolant return 17a, 17b.
  • This dip tube / return opening arrangement is provided in both winding carrier interiors.
  • the further ends of the winding carriers 1, 2 - the electrical connection ends 1a, 2a - are hydraulically closed in the first variant by cover 26 with cover sealing ring 27.
  • cover 26 with cover sealing ring 27.
  • the waste heat produced by the winding 3 during operation and conducted via the winding carriers 1, 2 is released to the liquid via the inner lateral surface of the carrier 1, 2.
  • A can Temperature jump from approx. 150 ° C on winding 3 to approx. 70 ° C on the inner surface of the carrier 1, 2 occur.
  • the gaps 28a, 28b which result between the inner lateral surface of the winding carriers 1, 2 and the outer lateral surface of the immersion tubes 18a, 18b can be narrow for guiding the coolant.
  • the installation of the choke coil within a converter module is very simple, since only a 2-point bearing is necessary on both end faces.
  • the end fittings 6, 7 on the electrical connection sides 1a, 2a which are provided with screw connections for this purpose, serve as the first fastening points.
  • the screw connections between the cooling rails 15 and the cooling connection sides 1b, 2b of the winding supports serve as second fastening points.
  • FIG. 2 shows a section near a connection side of the choke coil.
  • the winding carriers 1, 2, the winding 3, the casting 5 and the magnetic shielding caps 10a, 10b can be seen.
  • the position of the immersion tubes 18a, 18b within the interior of the winding carriers 1, 2 and the gaps 28a, 28b are indicated.
  • the winding carriers consist of composite tubes with an inner metal tube 20 with electrical insulation 21 applied.
  • the electrical insulation 21 consists, for example, of cast resin with aluminum nitride as filler. The heat dissipation is improved by the addition of this filler.
  • the winding 3 is applied to the electrical insulation 21.
  • This variant has the advantage that the cooling liquid does not come into direct contact with the electrical insulation. Furthermore, the composite pipe is mechanically very stable.
  • FIG. 1 A further alternative winding carrier design is shown in FIG.
  • the winding carriers consist of porcelain or ceramic tubes 22.
  • This variant also has the advantage that the cooling liquid (process water) does not come into contact with an organic insulating agent. Due to the good thermal conductivity of porcelain or ceramic, the wall thickness of the tubes 22 can be relatively thick, which leads to a mechanically very stable construction. With this variant, temperature differences of up to 90 ° C are possible.
  • FIG. 5 shows a section through a choke coil with additional external cooling.
  • Winding carriers 1, 2 with winding 3 and bandage 4 can be seen.
  • An insulating sleeve 23 serves for the external electrical insulation of the winding.
  • a cooling jacket 25 for the coolant flow between the insulating jacket 23 and jacket 24 is formed by means of a further outer jacket 24.
  • the coolant enters the cavities 33 of the winding carriers 1, 2, for example, via a flow opening from the coolant feed of the cooling rail and flows back into the coolant return of the cooling rail via the gaps 28a, 28b and the cooling jacket 25.
  • the internal cooling of the choke coil by means of dip tubes 18a, 18b and gaps 28a, 28b can also be seen.
  • This variant of a choke coil can be used with very powerful choke coils in which internal cooling alone is not sufficient to dissipate heat.
  • FIG. 6 shows a section through a gap formed between winding support 1 and dip tube 18a. It can be seen that the gap is divided into three gap segments 28a ', 28a'',28a''' parallel to the main axis of the choke coil by means of three separating webs 29. This measure prevents an annular electrical Can of course form a conductive water jacket and is of course also used in the gap 28b and in the cooling jacket 25.
  • FIG. 7 shows a second variant of a choke coil.
  • a choke coil 30 with end fittings 6, 7 for the electrical connection can be seen, in which the electrical connection side is also a cooling connection side, i.e. the choke coil 30 is penetrated by two coolant lines 31, 32, which emerge from the choke coil on both end faces, the winding 3 of the choke coil enclosing the two coolant lines 31, 32.
  • Each of the two coolant lines 31, 32 is double-walled, so that the outer jacket the winding support 1 and the inner jacket the dip tube, e.g. 18a.
  • the gap between the two jackets, e.g. 28a is used for throttle cooling, while the cavity 33 in the interior of the inner jacket advantageously serves for the transport of coolant.

Abstract

The invention proposes an inductor coil for a converter, having two tubular winding carriers which are arranged parallel and immediately side by side and carry a winding which consists of two winding elements, the winding start and winding end being arranged at one end. The winding carriers (1, 2) are used as heat sinks for internal cooling of the inductor coil by means of an electric conductive cooling liquid. An immersion tube (18a, 18b) projects into the interior of each winding carrier (1, 2), as a result of which gaps (28a, 28b), which are suitable for liquid cooling, are formed between the immersion tubes (18a, 18b) and the winding carriers (1, 2). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Drosselspule für einen Stromrichter gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a choke coil for a converter according to the preamble of claim 1.

Eine solche Drosselspule für einen Stromrichter ist aus der DE 40 08 424 A1 bekannt. Dort wird eine Drosselspule für einen Stromrichter mit einer auf einem zylinderförmigen Wicklungsträger aufgewickelten Drosselwicklung vorgeschlagen, bei der der Wicklungsträger aus mindestens zwei jeweils stab- oder rohrförmigen Wicklungsträgerabschnitten besteht, die jeweils über Verbindungsteile miteinander verbunden sind. Die jeweils die Teilwicklungen der Drosselwicklung tragenden Wicklungsträgerabschnitte sind so angeordnet, daß sich die erzeugten Magnetfelder teilweise gegenseitig aufheben bzw. abschwächen. Diese Drosselspule eignet sich jedoch nicht zur Flüssigkeitskühlung.Such a choke coil for a converter is known from DE 40 08 424 A1. There, a choke coil for a converter with a choke winding wound on a cylindrical winding support is proposed, in which the winding support consists of at least two rod-shaped or tubular winding support sections, each of which is connected to one another via connecting parts. The winding carrier sections each carrying the partial windings of the choke winding are arranged in such a way that the magnetic fields generated partially cancel or weaken one another. However, this choke coil is not suitable for liquid cooling.

Eine wassergekühlte, in Gießharz (Vergußmasse) eingebettete Drosselspule für Stromrichteranlagen ist aus der DE 37 43 222 C2 bekannt. Die Spule ist in einem Kreisringbehälter aus amagnetischem Material angeordnet und versiegelt, wobei an dem Behälterdeckel stoffschlüssig angebrachte Tüllen zur Durchführung der elektrischen Zuleitungen vorhanden sind, und wobei der Raum zwischen Spule und Behälterwandung zur Stützung und als Wärmebrücke mit der Vergußmasse ausgefüllt ist. Die Spule ist mit ihrem Behälter in einem von dem Kühlwasser durchströmten Kessel angeordnet, wobei in Zwischenräumen zwischen dem Kreisringbehälter und Magnetteilen der Drosselspule oder zwischen diesem, dem Kessel und einem darin angeordneten Füllkörper Wasserführungen derart angeordnet sind, daß sie eine schraubenlinienartige Führung des Kühlwassers um den Kreisringbehälter erzeugen.A water-cooled choke coil embedded in casting resin (potting compound) for converter systems is known from DE 37 43 222 C2. The coil is in an annular container Arranged and sealed from non-magnetic material, with materially attached grommets are provided on the container lid for carrying out the electrical supply lines, and the space between the coil and the container wall is filled with the sealing compound for support and as a thermal bridge. The coil is arranged with its container in a boiler through which the cooling water flows, wherein water gaps are arranged in spaces between the annular container and magnetic parts of the choke coil or between the latter, the boiler and a packing element arranged therein such that they provide a helical guide for the cooling water around the Create an annular container.

Der Erfindung liegt die Aufgabe zugrunde, eine Drosselspule für einen Stromrichter der eingangs genannten Art anzugeben, die mit Brauchwasser gekühlt werden kann und die nur ein geringes externes Magnetfeld abgibt.The invention has for its object to provide a choke coil for a converter of the type mentioned, which can be cooled with hot water and which emits only a small external magnetic field.

Diese Aufgabe wird in Verbindung mit den Merkmalen des Oberbegriffes erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved in connection with the features of the preamble according to the invention by the features specified in the characterizing part of claim 1.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß die Drosselspule effizient gekühlt werden kann und dabei sehr einfach aufgebaut ist.The advantages that can be achieved with the invention are, in particular, that the inductor can be cooled efficiently and is of a very simple construction.

Ferner sind keine aufwendigen magnetischen Abschirmeinrichtungen notwendig, um störende, nach außen wirkende Magnetfelder zu reduzieren. Die gemäß dem Toroid-Prinzip aufgebaute Drosselspule ist rüttelsicher und robust und darüberhinaus sehr kompakt, wodurch Gewichts- und Raumvorteile erzielt werden, was insbesondere beim Einbau der Drosselspule in einem gekapselten, wassergekühlten Stromrichtermodul für ein Schienenfahrzeug von großer Wichtigkeit ist. Da die von der Drosselspule nach außen abgegebenen Magnetfelder sehr gering sind, werden nur relativ geringe Verluste in den metallenen Gehäusewandungen des Stromrichtermoduls erzeugt.Furthermore, no complex magnetic shielding devices are necessary in order to reduce disturbing magnetic fields that act on the outside. The choke coil, which is constructed according to the toroid principle, is vibration-proof and robust and, moreover, very compact, which saves weight and space, which is particularly important for a rail vehicle when installing the choke coil in an encapsulated, water-cooled converter module. Because the magnetic fields emitted to the outside by the choke coil are very are low, only relatively small losses are generated in the metal housing walls of the converter module.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.

Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsbeispiele erläutert. Es zeigen:

Figur 1
einen seitlichen Schnitt durch eine erste Variante einer Drosselspule,
Figur 2
einen Schnitt in der Nähe einer Anschlußseite der Drosselspule,
Figur 3, 4
alternative Wicklungsträgergestaltungen,
Figur 5
einen Schnitt durch eine Drosselspule mit zusätzlicher Außenkühlung,
Figur 6
einen Schnitt durch einen zwischen Wicklungsträger und Tauchrohr gebildeten Spalt,
Figur 7
eine zweite Variante einer Drosselspule.
The invention is explained below with reference to the embodiments shown in the drawing. Show it:
Figure 1
a side section through a first variant of a choke coil,
Figure 2
a section near a connection side of the choke coil,
Figure 3, 4
alternative winding carrier designs,
Figure 5
a section through a choke coil with additional external cooling,
Figure 6
4 shows a section through a gap formed between the winding support and the dip tube,
Figure 7
a second variant of a choke coil.

In Figur 1 ist ein seitlicher Schnitt durch eine erste Variante einer Drosselspule dargestellt. Es sind zwei parallel und unmittelbar nebeneinander angeordnete, rohrförmige Wicklungsträger 1, 2 zu erkennen, die zum einen für das Aufbringen der Wicklung 3 und zum anderen als Kühlkörper für die Innenkühlung der Drossel dienen. Die Wicklungsträger 1, 2 bestehen beispielsweise aus einem dünnwandigen Kunststoffrohr mit einer hohen mechanischen Festigkeit, einem dauerhaft sehr guten Isoliervermögen und einer hinreichend guten Wärmeleitfähigkeit. Beispielsweise eignet sich ein GFK-Rohr mit Gießharz oder ein Polyamidrohr. Varianten sind in den Figuren 3 und 4 dargestellt.FIG. 1 shows a side section through a first variant of a choke coil. Two tubular winding supports 1, 2 arranged in parallel and directly next to one another can be seen, which serve on the one hand for the application of the winding 3 and on the other hand as a heat sink for the internal cooling of the choke. The winding carriers 1, 2 consist, for example, of a thin-walled plastic tube with a high mechanical strength, long-term very good insulation properties and a sufficiently good thermal conductivity. For example, a GRP pipe with cast resin or a polyamide pipe is suitable. Variants are shown in Figures 3 and 4.

Jeder Wicklungsträger 1 bzw. 2 weist an seinem einen Ende eine Elektroanschlußseite 1a bzw. 2a und an seinem anderen Ende eine Kühlanschlußseite 1b bzw. 2b auf. Die aus zwei Teilwicklungen bestehende Wicklung 3 beginnt beispielsweise an der Elektroanschlußseite 1a, erstreckt sich schraubenförmig bis zur Kühlanschlußseite 1b, wechselt von dort zur Kühlanschlußseite 2b und verläuft weiter schraubenförmig bis zur Elektroanschlußseite 2a. Der sich um die einzelnen Wicklungsträger windende Wicklungsstrang kann aus einer Vielzahl elektrisch voneinander isolierter Einzeldrähte bestehen, was die elektrischen Verluste bei Betrieb der Drosselspule reduziert. Daneben ist es jedoch auch möglich, die Wicklung als Aluminium-Gußteil einstückig auszubilden.Each winding support 1 or 2 has an electrical connection side 1a or 2a at one end and a cooling connection side 1b or 2b at its other end. The winding 3 consisting of two partial windings begins, for example on the electrical connection side 1a, extends helically to the cooling connection side 1b, changes from there to the cooling connection side 2b and continues helically to the electrical connection side 2a. The winding strand winding around the individual winding carriers can consist of a large number of individual wires which are electrically insulated from one another, which reduces the electrical losses during operation of the inductor. In addition, however, it is also possible to form the winding in one piece as an aluminum casting.

Eine Bandage 4 um den Wicklungsstrang hat eine mehrfache Funktion und stellt zum ersten eine elastische Pufferung dar, die Spannungs- oder Schockrisse verhindert, dient zum zweiten zur Abkoppelung der Wicklungserwärmung auf den nachstehend näher beschriebenen äußeren Umguß 5 und erhöht zum dritten die mechanische Festigkeit.A bandage 4 around the winding strand has a multiple function and is firstly an elastic buffering that prevents stress or shock cracks, secondly serves to decouple the winding heating to the outer casting 5 described in more detail below, and thirdly increases the mechanical strength.

Der vorzugsweise aus Gießharz gebildete Umguß 5 umhüllt die Wicklung 3 an ihren nach außen gerichteten Mantel- und Stirnflächen und stellt somit die elektrische Isolation der Wicklung 3 nach außen sicher. Damit die Temperaturen am nicht gekühlten Wicklungsanfang 3a und Wicklungsende 3b nicht auf zu hohe Werte ansteigen, sind dort starke Querschnittsvergrößerungen der Wicklung vorgesehen. Dies ist durch entsprechende Gestaltung der Endarmaturen 6 und 7 berücksichtigt und konstruktiv gelöst. Bei einer als Aluminium-Gußteil ausgebildeten Wicklung können die im Querschnitt vergrößerten Endarmaturen 6, 7 gleichzeitig mit dem Wicklungsstrang gegossen werden. Zur Gewährleistung der Kurzschlußfestigkeit sind die Endarmaturen 6, 7 über Verschraubungen 8, 9 mit den Wicklungsträgern 1, 2 verbunden. Zusätzlich hält auch der Umguß 5 Wicklung 3 und Endarmaturen 6, 7 fest zusammen. Die "Schrumpfkraft" des Umgusses 5 stellt auch den zur Anpressung der Wicklung auf die Wicklungsträger notwendigen Druck sicher, wodurch sich ein guter Wärmeübergang von der Wicklung zum Wicklungsträger ergibt.The encapsulation 5, which is preferably formed from cast resin, envelops the winding 3 on its outwardly directed jacket and end faces and thus ensures the electrical insulation of the winding 3 from the outside. So that the temperatures at the non-cooled winding start 3a and winding end 3b do not rise to high values, there are provided large cross-sectional enlargements of the winding. This is taken into account by appropriate design of the end fittings 6 and 7 and solved structurally. In the case of a winding formed as an aluminum casting, the end fittings 6, 7, which are enlarged in cross section, can be cast simultaneously with the winding strand. To ensure the short-circuit strength, the end fittings 6, 7 are connected to the winding carriers 1, 2 via screw connections 8, 9. In addition, the casting 5 holds the winding 3 and end fittings 6, 7 together. The "shrinking force" of the casting 5 also ensures the pressure required for pressing the winding onto the winding carrier, which results in a good heat transfer from the winding to the winding carrier results.

In den sich zwischen beiden Wicklungsträgern 1,2 ausbildenden externen Zwischenräumen ist jeweils eine Magnetabschirmkappe 10a, 11a angeordnet. Diese Magnetabschirmkappen 10a, 11a reduzieren die von der Drosselspule nach außen abgegebenen, randseitigen Magnetfelder, so daß nur relativ geringe elektrische Verluste in den die Drossel umgebenden metallenen Gehäusewandungen eines Stromrichtermoduls erzeugt werden. Die Magnetabschirmkappen 10a, 11a können beispielsweise auf Stegen 12a, 13a montiert (verschraubt) sein, die Teil des Umgusses 5 sind und zusätzlich zur Kurzschlußfestigkeit der Drosselspule beitragen.A magnetic shielding cap 10a, 11a is arranged in each of the external spaces formed between the two winding carriers 1, 2. These magnetic shielding caps 10a, 11a reduce the edge-side magnetic fields emitted from the choke coil, so that only relatively small electrical losses are generated in the metal housing walls of a converter module surrounding the choke. The magnetic shield caps 10a, 11a can, for example, be mounted (screwed) on webs 12a, 13a, which are part of the encapsulation 5 and additionally contribute to the short-circuit strength of the choke coil.

Wie vorstehend bereits erwähnt, weist die Drosselspule eine Innenkühlung unter Einsatz von Kühlflüssigkeit - vorzugsweise Brauchwasser - auf. Hierzu ist die Drosselspule gemäß erster Variante an der Kühlanschlußseite unter Zwischenlage von Dichtungen 14 auf einer Kühlschiene 15 montiert. Die Kühlschiene 15 weist einen Kühlflüssigkeitsvorlauf 16 und hiervon getrennte Kühlflüssigkeitsrückläufe 17a, 17b auf. Dabei gelangt die Kühlflüssigkeit über mit dem Kühlflüssigkeitsvorlauf 16 verbundene, tief in den Innenraum des Wicklungsträgers 1 ragende Tauchrohre 18a, 18b (Wasserleitrohre) in die Drosselspule und strömt über Rücklauföffnungen 19a, 19b zum Kühlflüssigkeitsrücklauf 17a, 17b. Diese Tauchrohr/Rücklauföffnung-Anordnung ist bei beiden Wicklungsträger-Innenräumen vorgesehen. Die weiteren Enden der Wicklungsträger 1, 2 - die Elektroanschlußenden 1a, 2a - sind bei der ersten Variante durch Deckel 26 mit Deckeldichtring 27 hydraulisch verschlossen. Während des Rückströmens der Kühlflüssigkeit wird die von der Wicklung 3 während des Betriebes produzierte, über die Wicklungsträger 1, 2 geleitete Verlustwärme über die Innenmantelfläche des Trägers 1, 2 an die Flüssigkeit abgegeben. Dabei kann ein Temperatursprung von ca. 150°C an der Wicklung 3 auf ca. 70°C an der Innenmantelfläche des Trägers 1, 2 auftreten. Zur Erzielung hoher Kühlflüssigkeitsgeschwindigkeiten können die sich zwischen Innenmantelfläche der Wicklungsträger 1, 2 und Außenmantelfläche der Tauchrohre 18a, 18b ergebenden Spalte 28a, 28b zur Führung der Kühlflüssigkeit eng ausgebildet sein.As already mentioned above, the choke coil has internal cooling using coolant - preferably process water. For this purpose, the choke coil according to the first variant is mounted on a cooling rail 15 on the cooling connection side with the interposition of seals 14. The cooling rail 15 has a coolant flow 16 and separate coolant returns 17a, 17b. The coolant reaches the throttle coil via immersion tubes 18a, 18b (water guide tubes) connected to the coolant flow 16 and projecting deeply into the interior of the winding support 1 and flows through return openings 19a, 19b to the coolant return 17a, 17b. This dip tube / return opening arrangement is provided in both winding carrier interiors. The further ends of the winding carriers 1, 2 - the electrical connection ends 1a, 2a - are hydraulically closed in the first variant by cover 26 with cover sealing ring 27. During the backflow of the cooling liquid, the waste heat produced by the winding 3 during operation and conducted via the winding carriers 1, 2 is released to the liquid via the inner lateral surface of the carrier 1, 2. A can Temperature jump from approx. 150 ° C on winding 3 to approx. 70 ° C on the inner surface of the carrier 1, 2 occur. In order to achieve high coolant velocities, the gaps 28a, 28b which result between the inner lateral surface of the winding carriers 1, 2 and the outer lateral surface of the immersion tubes 18a, 18b can be narrow for guiding the coolant.

Die Montage der Drosselspule innerhalb eines Stromrichtermoduls gestaltet sich sehr einfach, da lediglich eine 2-Punkt-Lagerung an beiden Stirnflächen notwendig ist. Als erste Befestigungspunkte dienen die Endarmaturen 6, 7 an den Elektroanschlußseiten 1a, 2a, die hierzu mit Schraubanschlüssen versehen sind. Als zweite Befestigungspunkte dienen die Verschraubungen zwischen Kühlschienen 15 und den Kühlanschlußseiten 1b, 2b der Wicklungsträger (Schiebe- und Fixlagerbefestigungen).The installation of the choke coil within a converter module is very simple, since only a 2-point bearing is necessary on both end faces. The end fittings 6, 7 on the electrical connection sides 1a, 2a, which are provided with screw connections for this purpose, serve as the first fastening points. The screw connections between the cooling rails 15 and the cooling connection sides 1b, 2b of the winding supports (sliding and fixed bearing fastenings) serve as second fastening points.

In Figur 2 ist ein Schnitt in der Nähe einer Anschlußseite der Drosselspule dargestellt. Es sind die Wicklungsträger 1, 2, die Wicklung 3, der Umguß 5 und die Magnetabschirmkappen 10a, 10b zu erkennen. Die Lage der Tauchrohre 18a, 18b innerhalb der Innenräume der Wicklungsträger 1, 2 und die Spalte 28a, 28b sind angedeutet.FIG. 2 shows a section near a connection side of the choke coil. The winding carriers 1, 2, the winding 3, the casting 5 and the magnetic shielding caps 10a, 10b can be seen. The position of the immersion tubes 18a, 18b within the interior of the winding carriers 1, 2 and the gaps 28a, 28b are indicated.

In Figur 3 ist eine alternative Wicklungsträgergestaltung dargestellt. Bei dieser Variante bestehen die Wicklungsträger aus Verbundrohren mit einem inneren Metallrohr 20 mit aufgebrachter elektrischer Isolation 21. Die elektrische Isolation 21 besteht beispielsweise aus Gießharz mit Aluminiumnitrid als Füllstoff. Durch den Zusatz dieses Füllstoffes wird die Wärmeabfuhr verbessert. Auf die elektrische Isolation 21 ist die Wicklung 3 aufgebracht. Diese Variante hat den Vorteil, daß die Kühlflüssigkeit nicht in direkten Kontakt mit der elektrischen Isolierung gelangt. Ferner ist das Verbundrohr mechanisch sehr stabil.An alternative winding carrier design is shown in FIG. In this variant, the winding carriers consist of composite tubes with an inner metal tube 20 with electrical insulation 21 applied. The electrical insulation 21 consists, for example, of cast resin with aluminum nitride as filler. The heat dissipation is improved by the addition of this filler. The winding 3 is applied to the electrical insulation 21. This variant has the advantage that the cooling liquid does not come into direct contact with the electrical insulation. Furthermore, the composite pipe is mechanically very stable.

In Figur 4 ist eine weitere alternative Wicklungsträgergestaltung dargestellt. Bei dieser Variante bestehen die Wicklungsträger aus Porzellan- oder Keramikrohren 22. Diese Variante hat ebenfalls den Vorteil, daß die Kühlflüssigkeit (Brauchwasser) nicht in Kontakt mit einem organischen Isoliermittel tritt. Aufgrund der guten Wärmeleitfähigkeit von Porzellan oder Keramik kann die Wandstärke der Rohre 22 relativ dick sein, was zu einer mechanisch sehr stabilen Konstruktion führt. Bei dieser Variante sind Temperaturdifferenzen bis zu 90°C möglich.A further alternative winding carrier design is shown in FIG. In this variant, the winding carriers consist of porcelain or ceramic tubes 22. This variant also has the advantage that the cooling liquid (process water) does not come into contact with an organic insulating agent. Due to the good thermal conductivity of porcelain or ceramic, the wall thickness of the tubes 22 can be relatively thick, which leads to a mechanically very stable construction. With this variant, temperature differences of up to 90 ° C are possible.

In Figur 5 ist ein Schnitt durch eine Drosselspule mit zusätzlicher Außenkühlung dargestellt. Es sind Wicklungsträger 1, 2 mit Wicklung 3 und Bandage 4 zu erkennen. Eine Isolierhülle 23 dient zur äußeren elektrischen Isolation der Wicklung. Mittels einer weiteren äußeren Hülle 24 wird ein Kühlmantel 25 für die Kühlflüssigkeitsströmung zwischen Isolierhülle 23 und Hülle 24 gebildet. Die Kühlflüssigkeit tritt beispielsweise über eine Vorlauföffnung aus dem Kühlflüssigkeitsvorlauf der Kühlschiene in die Hohlräume 33 der Wicklungsträger 1, 2 ein und fließt über die Spalte 28a, 28b und den Kühlmantel 25 zurück in den Kühlflüssigkeitsrücklauf der Kühlschiene. Die Innenkühlung der Drosselspule mittels Tauchrohre 18a, 18b und Spalte 28a, 28b ist ebenfalls zu erkennen. Diese Variante einer Drosselspule ist bei sehr leistungsstarken Drosselspulen einsetzbar, bei denen eine Innenkühlung allein zur Verlustwärmeabfuhr nicht ausreicht.FIG. 5 shows a section through a choke coil with additional external cooling. Winding carriers 1, 2 with winding 3 and bandage 4 can be seen. An insulating sleeve 23 serves for the external electrical insulation of the winding. A cooling jacket 25 for the coolant flow between the insulating jacket 23 and jacket 24 is formed by means of a further outer jacket 24. The coolant enters the cavities 33 of the winding carriers 1, 2, for example, via a flow opening from the coolant feed of the cooling rail and flows back into the coolant return of the cooling rail via the gaps 28a, 28b and the cooling jacket 25. The internal cooling of the choke coil by means of dip tubes 18a, 18b and gaps 28a, 28b can also be seen. This variant of a choke coil can be used with very powerful choke coils in which internal cooling alone is not sufficient to dissipate heat.

In Figur 6 ist ein Schnitt durch einen zwischen Wicklungsträger 1 und Tauchrohr 18a gebildeten Spalt dargestellt. Es ist zu erkennen, daß der Spalt mit Hilfe von drei Trennstegen 29 in drei Spaltsegmente 28a', 28a'', 28a''' parallel zur Hauptachse der Drosselspule unterteilt ist. Diese Maßnahme verhindert, daß sich ein ringförmiger elektrisch leitfähiger Wassermantel ausbilden kann und wird selbstverständlich auch beim Spalt 28b sowie beim Kühlmantel 25 angewendet.FIG. 6 shows a section through a gap formed between winding support 1 and dip tube 18a. It can be seen that the gap is divided into three gap segments 28a ', 28a'',28a''' parallel to the main axis of the choke coil by means of three separating webs 29. This measure prevents an annular electrical Can of course form a conductive water jacket and is of course also used in the gap 28b and in the cooling jacket 25.

In Figur 7 ist eine zweite Variante einer Drosselspule dargestellt. Es ist eine Drosselspule 30 mit Endarmaturen 6, 7 für den elektrischen Anschluß zu erkennen, bei dem die Elektroanschlußseite gleichzeitig auch eine Kühlanschlußseite ist, d.h. die Drosselspule 30 wird von zwei Kühlflüssigkeitsleitungen 31, 32 durchdrungen, die an beiden Stirnflächen aus der Drosselspule austreten, wobei die Wicklung 3 der Drosselspule die beiden Kühlflüssigkeitsleitungen 31, 32 umschließt. Jede der beiden Kühlflüssigkeitsleitungen 31, 32 ist doppelwandig aufgebaut, so daß der äußere Mantel den Wicklungsträger 1 und der innere Mantel das Tauchrohr, z.B. 18a, bildet. Der zwischen beiden Mänteln befindliche Spalt, z.B. 28a, dient wiederum zur Drosselkühlung, während der Hohlraum 33 im Innenraum des inneren Mantels vorteilhaft zum Kühlflüssigkeitstransport dient.FIG. 7 shows a second variant of a choke coil. A choke coil 30 with end fittings 6, 7 for the electrical connection can be seen, in which the electrical connection side is also a cooling connection side, i.e. the choke coil 30 is penetrated by two coolant lines 31, 32, which emerge from the choke coil on both end faces, the winding 3 of the choke coil enclosing the two coolant lines 31, 32. Each of the two coolant lines 31, 32 is double-walled, so that the outer jacket the winding support 1 and the inner jacket the dip tube, e.g. 18a. The gap between the two jackets, e.g. 28a, in turn, is used for throttle cooling, while the cavity 33 in the interior of the inner jacket advantageously serves for the transport of coolant.

Claims (13)

Drosselspule für einen Stromrichter, mit zwei parallel und unmittelbar nebeneinander angeordneten, rohrförmigen Wicklungsträgern, die eine aus zwei Teilwicklungen bestehende Wicklung tragen, wobei Wicklungsanfang und Wicklungsende an einer Stirnseite angeordnet sind, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) als Kühlkörper zur Innenkühlung der Drosselspule mit einer elektrisch leitfähigen Kühlflüssigkeit dienen und in den Innenraum eines jeden Wicklungsträgers (1,2) ein Tauchrohr (18a, 18b) ragt, wodurch zur Kühlflüssigkeitskühlung geeignete Spalte (28a,28b) zwischen Tauchrohren (18a,18b) und Wicklungsträgern (1,2) gebildet werden.Choke coil for a power converter, with two tubular winding carriers arranged in parallel and directly next to one another, which carry a winding consisting of two partial windings, the beginning and end of the winding being arranged on one end face, characterized in that the winding carriers (1, 2) act as heat sinks for internal cooling serve the choke coil with an electrically conductive cooling liquid and an immersion tube (18a, 18b) protrudes into the interior of each winding support (1, 2), as a result of which gaps (28a, 28b) suitable for cooling liquid cooling between immersion tubes (18a, 18b) and winding supports (1 , 2) are formed. Drosselspule nach Anspruch 1, dadurch gekennzeichnet, daß die Wicklung (3) am Wicklungsanfang (3a) und am Wicklungsende (3b) jeweils einen vergrößerten Querschnitt aufweist.Choke coil according to Claim 1, characterized in that the winding (3) has an enlarged cross section at the beginning of the winding (3a) and at the end (3b) of the winding. Drosselspule nach Anspruch 1 und/oder 2, dadurch gekennzeichnet, daß die Wicklung (3) mit einer Bandage (4) umwickelt ist.Choke coil according to claim 1 and / or 2, characterized in that the winding (3) is wrapped with a bandage (4). Drosselspule nach wenigstens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein Umguß (5) die Drosselspule umhüllt, wobei lediglich die Endarmaturen (6,7) der elektrischen Anschlüsse und die Stirnseiten ausgespart sind.Choke coil according to at least one of Claims 1 to 3, characterized in that a casting (5) envelops the choke coil, only the end fittings (6, 7) of the electrical connections and the end faces being left out. Drosselspule nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) aus einem Kunststoffrohr bestehen.Choke coil according to at least one of Claims 1 to 4, characterized in that the winding carriers (1, 2) consist of a plastic tube. Drosselspule nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) aus einem GFK-Rohr bestehen.Choke coil according to at least one of Claims 1 to 4, characterized in that the winding carriers (1, 2) consist of a GRP tube. Drosselspule nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) aus einem Verbundrohr mit innerem Metallrohr (20) und äußerer elektrischer Isolation (21) besteht.Choke coil according to at least one of Claims 1 to 4, characterized in that the winding carrier (1, 2) consists of a composite tube with an inner metal tube (20) and external electrical insulation (21). Drosselspule nach Anspruch 7, dadurch gekennzeichnet, daß die elektrische Isolation (21) aus einem Gießharz mit Aluminiumnitrid als Füllstoff besteht.Choke coil according to claim 7, characterized in that the electrical insulation (21) consists of a cast resin with aluminum nitride as filler. Drosselspule nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) aus einem Porzellan- oder Keramikrohr (22) bestehen.Choke coil according to at least one of Claims 1 to 4, characterized in that the winding carriers (1, 2) consist of a porcelain or ceramic tube (22). Drosselspule nach wenigstens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Elektroanschlußseiten (1a, 2a), an denen sich Wicklungsanfang und Wicklungsende befinden, hydraulisch abgedichtet sind und lediglich die gegenüberliegenden Kühlanschlußseiten (1b,2b) zum hydraulisch dichten Anschluß an eine Kühlschiene (15) geeignet ausgebildet sind.Choke coil according to at least one of Claims 1 to 9, characterized in that the electrical connection sides (1a, 2a), on which the winding start and end are located, are hydraulically sealed and only the opposite cooling connection sides (1b, 2b) for the hydraulically sealed connection to a cooling rail (15) are suitably designed. Drosselspule nach wenigstens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Wicklungsträger (1,2) beide Stirnseiten durchstoßen.Choke coil according to at least one of Claims 1 to 9, characterized in that the winding carriers (1, 2) penetrate both end faces. Drosselspule nach wenigstens einem der Ansprüche 1 bis 11, gekennzeichnet durch eine zusätzliche Außenkühlung über einen Kühlmantel (25) zwischen einer die Wicklung (3) bedeckenden Isolierhülle (23) und einer äußeren Hülle (24), wobei der Kühlmantel (25) hydraulisch dicht mit Kühlflüssigkeitsvorlauf (16) und Kühlflüssigkeitsrücklauf (17) eines Kühlflüssigkeitssystems verbunden ist.Choke coil according to at least one of Claims 1 to 11, characterized by additional external cooling via a cooling jacket (25) between an insulating sleeve (23) covering the winding (3) and an outer jacket (24), the cooling jacket (25) being hydraulically tight Coolant flow (16) and coolant return (17) of a coolant system is connected. Drosselspule nach wenigstens einem der Ansprüche 1 bgis 12, dadurch gekennzeichnet, daß die zwischen Tauchrohren (18a,18b) und Wicklungsträgern (1,2) gebildeten Spalte (28a,28b) und/oder der Kühlmantel (25) durch Trennstege (29) in Segmente parallel zur Haptachse der Drosselspule unterteilt ist.Choke coil according to at least one of Claims 1 to 12, characterized in that the gaps (28a, 28b) formed between the immersion tubes (18a, 18b) and winding carriers (1, 2) and / or the cooling jacket (25) by separating webs (29) in Segments is divided parallel to the haptic axis of the choke coil.
EP93112152A 1992-08-04 1993-07-29 Choke coil for a converter Expired - Lifetime EP0582218B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4225677A DE4225677A1 (en) 1992-08-04 1992-08-04 Choke coil for a converter
DE4225677 1992-08-04

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EP0582218A1 true EP0582218A1 (en) 1994-02-09
EP0582218B1 EP0582218B1 (en) 1995-11-02

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Cited By (2)

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WO2013014031A1 (en) * 2011-07-22 2013-01-31 Siemens Aktiengesellschaft Winding arrangement having coil windings and a cooling duct system
CN112614664A (en) * 2020-12-11 2021-04-06 华中科技大学 Repetition frequency water-cooling inductor for special integrated power supply system and manufacturing method

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Publication number Priority date Publication date Assignee Title
DE102007014360A1 (en) * 2007-03-26 2008-10-02 Abb Technology Ag Spacers for windings

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EP0040262A1 (en) * 1980-05-16 1981-11-25 Westinghouse Electric Corporation Electrical reactor with foil windings
DE3743222A1 (en) * 1987-12-19 1989-06-29 Asea Brown Boveri Cooled inductor coil for converter installations
US4896130A (en) * 1987-11-16 1990-01-23 Ermilov Igor V Magnetic system
DE4008424A1 (en) * 1990-03-16 1991-09-19 Asea Brown Boveri Inductance coil for an inverter - has coil former constructed from four sections with corner inserts

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CH297561A (en) * 1952-02-06 1954-03-31 Oerlikon Maschf Liquid-cooled transformer.

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Publication number Priority date Publication date Assignee Title
EP0040262A1 (en) * 1980-05-16 1981-11-25 Westinghouse Electric Corporation Electrical reactor with foil windings
US4896130A (en) * 1987-11-16 1990-01-23 Ermilov Igor V Magnetic system
DE3743222A1 (en) * 1987-12-19 1989-06-29 Asea Brown Boveri Cooled inductor coil for converter installations
DE4008424A1 (en) * 1990-03-16 1991-09-19 Asea Brown Boveri Inductance coil for an inverter - has coil former constructed from four sections with corner inserts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014031A1 (en) * 2011-07-22 2013-01-31 Siemens Aktiengesellschaft Winding arrangement having coil windings and a cooling duct system
CN112614664A (en) * 2020-12-11 2021-04-06 华中科技大学 Repetition frequency water-cooling inductor for special integrated power supply system and manufacturing method

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DE4225677A1 (en) 1994-03-10
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