EP0576418A1 - Process for producing cast resin coils and cast resin coils thus produced. - Google Patents

Process for producing cast resin coils and cast resin coils thus produced.

Info

Publication number
EP0576418A1
EP0576418A1 EP91906470A EP91906470A EP0576418A1 EP 0576418 A1 EP0576418 A1 EP 0576418A1 EP 91906470 A EP91906470 A EP 91906470A EP 91906470 A EP91906470 A EP 91906470A EP 0576418 A1 EP0576418 A1 EP 0576418A1
Authority
EP
European Patent Office
Prior art keywords
coils
winding
coil
cast resin
sector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91906470A
Other languages
German (de)
French (fr)
Other versions
EP0576418B1 (en
Inventor
Friedrich Alber
Rudolf Dedelmar
Winfried Jungnitz
Hans Schott
Heinz Sesterheim
Siegfried Weiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0576418A1 publication Critical patent/EP0576418A1/en
Application granted granted Critical
Publication of EP0576418B1 publication Critical patent/EP0576418B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating
    • 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
    • H01F27/303—Clamping coils, windings or parts thereof together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to a method for producing a cast resin coil consisting of a plurality of axially layered disc coils and to such a cast resin coil.
  • a winding for a transformer is known from German utility model 71 26 814, which consists of axially strung, individually wound disc coils.
  • the individual disk coils have interspaces between their inner and outer partial windings lying coaxially one inside the other.
  • the spaces between the respective disc coils form axial cooling channels.
  • the winding can be cast in resin. In practice it has been found that the casting of the disc coils is very problematic. A solution to this is not given in the German utility model.
  • the invention is therefore based on the object of specifying a method with which windings made up of a plurality of disc coils with cooling channels can be produced. Another task is to provide an improved cast resin spool with strip conductors.
  • the first-mentioned object is achieved with a method according to the features of claim 1.
  • a coil produced by this method is characterized by a high mechanical strength and a good cooling effect.
  • disk coils with a plurality of concentrically arranged sector-shaped cooling channels can be produced in a simple manner by the method. This results in a significantly improved possibility of cooling the disc coils during operation.
  • an impregnable material layer is applied to the partial windings, at least in the peripheral sections lying between the spacers. This can be done, for example, by winding a fleece over the entire circumference. On the one hand, this protects the respective partial windings from injuries when the molded body is inserted, and on the other hand a precisely defined wall thickness of the cooling duct to the partial windings is achieved, which in turn improves the insulation values. Since no separating foils are used for the insulation, there are no additional potential interfaces on the wall of the cooling channel.
  • the method is preferably to be used with a strip conductor which consists, for example, of copper or aluminum.
  • a cast resin coil according to the features of claim 5.
  • Such a cast resin coil has only a slight stress on the cooling channel, since only the low winding voltage is present between the partial windings on the cooling channel, which are preferably continuously wound from a strip conductor.
  • the wall thickness of the cooling channel can be dimensioned to be particularly thin, which in turn contributes to improved cooling. This also saves material, which reduces the weight of the spool.
  • FIG. 2 shows the cast resin coil according to FIG. 1 in a longitudinal section along the line II-II.
  • the cross section in FIG. 1 is selected in the plane of a conductor, which can be designed as a strip or wire conductor.
  • the cast resin coil 1 has an inner first and an outer second partial winding 3 and 5, which are arranged concentrically one inside the other.
  • the inner partial winding 3 can be arranged on a bobbin or wound self-supporting.
  • a soakable material layer 7a can optionally be applied to the circumference of the inner partial winding 3 (shown in broken lines). They close in the radial direction of the First, spacers 11, 11a, 11b add a further material layer 7b and the outer partial winding 5. Suitable material layers 7a, 7b are, for example, mats made of glass fiber, which have a predetermined thickness due to their production.
  • the spacers 11, 11a, 11b are arranged on the inner partial winding 3 in such a way that they form sector-shaped gaps 8 between the inner and the outer partial winding 3 and 5.
  • the thickness of the spacer bodies 11 determines the distance between the partial windings 3 and 5.
  • a plurality of axially adjacent intermediate spaces 8 each form a cooling channel 9.
  • the material layers 7a and 7b determine the wall thickness from the cooling channel 9 to the conductor of the respective partial winding 3 , 5th
  • the partial windings 3 and 5 are continuously wound from a conductor 13a. It is also possible to wind in two layers, the second layer 13b being an insulating layer or else a further conductor insulated from the conductor 13a.
  • the spaces 8 are sector-shaped in the manner of circular ring sections.
  • the conductor 13a is led out in a known manner on a front part 14 of the cast resin coil 1, on which a connecting element 15 is arranged. It is also possible to connect the conductor 13a within the end part 14 to arrder conductors.
  • the spacers 11, 11a, 11b can also be arranged directly between the partial windings 3 and 5 without the interposition of a material layer 7a, 7b, so that the material layers 7a, 7b only lie against the partial windings 3 and 5 in the area of the spaces 8.
  • the cast resin coil 17 shown in FIG. 2 is constructed from a plurality of disc coils 17 joined to one another, which are wound, for example, from a strip conductor.
  • the disk coils 17 can also be wound from a wire conductor.
  • the individual disk coils 17 are joined axially, it being possible for spacer parts 19 to be inserted between the individual disk coils 17 (as shown in dashed lines).
  • spacer parts 19 it can be seen that the material layers 7a, 7b only extend over the axial width of the disc coils 17.
  • the material layers 7a, 7b are subsequently inserted into the sector-shaped spaces formed by the spacers 11a, 11b of the disc coils already joined together, the material layers 7a, 7b can also extend over the full length of the arrangement (analogous design as spacer layer 20) .
  • Such a cast resin coil 1 has a very high mechanical strength, since the partial windings 3 and 5 are no longer mechanically connected to one another as in the prior art, but form a structural unit. In particular, however, the electrical strength, especially in the area of the cooling channels 9 to the partial windings 3 and 5, is improved. This applies in particular to an embodiment with a strip conductor, since here only the low winding voltage occurs between the partial windings 3 and 5, which allows a reduction in the wall thickness of the cooling channel 9. However, this also enables improved cooling of the partial windings 3 and 5.
  • the individual partial windings of the disk coils 17 can be continuously wound from a conductor 13a, so that no additional external circuitry is required.
  • the transition of the conductor 13a from the inner partial winding 3 to the outer partial winding 5 preferably takes place in the region of the spacers 11a, 11b, the regions forming connecting webs 21 between the partial windings 3 and 5 after the casting.
  • the transitions of the individual conductors of the respective disk coils 17 can each be arranged offset in the circumferential direction by a web. In this way, stresses between the transitions can also be reduced.
  • the radial height of the cooling channels 9 is essentially determined by the spacers 11, 11a, 11b.
  • This height is in the range from 5 to 50 mm, preferably in the range from 10 to 20 mm.
  • spacers 11, 11a, 11b for example, strips are suitable which can also have a profile for guiding the shaped bodies.
  • More than two partial windings 3, 5 can also be arranged concentrically to one another, cooling channels then being arranged between the adjacent partial windings.
  • a first partial winding 3 consists of one or more
  • Conductors 13a are wound, on which one or more partial windings 5 are wound, each with the interposition of individual spacers 11, 11a, 11b.
  • the spacers 11, 11a, 11b are arranged so distributed over the circumference of the first partial winding 3 that sector-shaped, annular-segment-shaped spaces 8 are formed.
  • the arrangement can take place during the winding process. If a predetermined number of disk coils 17 are produced, they are joined axially to one another, the interspaces 8 being aligned and forming axial cooling channels 9.
  • the winding transitions of the conductor 13a from disk coil 17 to disk coil 17 can be arranged offset to one another in the circumferential direction.
  • at least one shaped body is inserted into each cooling channel 9, which extends axially over the entire length of the later cast resin coil, as a result of which the disk coils 17 are additionally aligned and fixed.
  • the moldings used can be lost or reusable. Their shape is according to the desired cooling channel shape.
  • the cooling channels 9 are sealed, in particular at their open ends, against the ingress of casting resin.
  • the disc coils 17 joined together in a manner known per se.
  • the disc coils 17 which are joined to one another are arranged with the shaped bodies in a casting mold and cast with a casting resin. This is done using the means and procedures generally known to those skilled in the art.
  • the potting mold and the shaped bodies are removed. If the moldings are reusable, they can be knocked out or pushed out, for example. Moldings that can be lost can be removed, for example, by destruction or heating.
  • the soakable material layer is applied to the partial windings 3 and 5 (as already described above) at least in the circumferential sections lying between the spacers 11, 11a, 11b.
  • the material layer 7a, 7b can also be applied after the disc coils 17 have been joined together, in that the cooling channels 9 are lined with the material layer 7a, 7b. If necessary, this can also be done with the aid of the molded bodies on which the material layer is placed.

Abstract

Afin de produire une bobine (1) en résine de coulée formée de plusieurs galettes (17) axialement superposées, on produit premièrement les galettes (17) en formant un premier enroulement partiel intérieur et un deuxième enroulement partiel extérieur (3, 5) et en intercalant entre ceux-ci des corps d'écartement individuels (11, 11a, 11b) de manière à former des intervalles en forme de secteurs. Les galettes individuelles (17) sont ensuite axialement assemblées et orientées de sorte que leurs intervalles se recouvrent, de manière à former des canaux de refroidissement (9) dans lesquels sont insérés des corps moulés. Les galettes (17) assemblées sont ensuite encapsulées. Lorsque la résine de coulée a durci, les corps moulés sont enlevés des canaux de refroidissement (9). Une bobine (19) en résine de coulée ainsi produite présente de préférence au niveau des canaux de refroidissement (9) une couche imprégnable de matériau (7a, 7b) qui permet de déterminer l'épaisseur des parois des canaux de refroidissement (9) par rapport aux conducteurs à ruban correspondants (13a).In order to produce a coil (1) of casting resin formed from several axially superposed wafers (17), the wafers (17) are first produced by forming a first partial internal winding and a second external partial winding (3, 5) and interposing therebetween individual spacer bodies (11, 11a, 11b) so as to form intervals in the form of sectors. The individual wafers (17) are then axially assembled and oriented so that their intervals overlap, so as to form cooling channels (9) into which are molded bodies. The assembled wafers (17) are then encapsulated. When the casting resin has hardened, the molded bodies are removed from the cooling channels (9). A coil (19) of casting resin thus produced preferably has at the cooling channels (9) an impregnable layer of material (7a, 7b) which makes it possible to determine the thickness of the walls of the cooling channels (9) by relative to the corresponding ribbon conductors (13a).

Description

Verfahren zum Herstellen einer Gießharzspule, sowie eine Gießharzspule Process for producing a cast resin coil, and a cast resin coil
Die Erfindung betrifft ein Verfahren zum Herstellen einer aus mehreren axial aneinander geschichteten Scheibenspulen be¬ stehende Gießharzspule sowie eine derartige Gießharzspule.The invention relates to a method for producing a cast resin coil consisting of a plurality of axially layered disc coils and to such a cast resin coil.
Aus dem deutschen Gebrauchsmuster 71 26 814 ist eine Wicklung für einen Transformator bekannt, die aus axial aneinanderge- reihten, einzeln gewickelten Scheibenspulen besteht. Die ein¬ zelnen Scheibenspulen weisen dabei zwischen ihren inneren und äußeren koaxial ineinander liegenden Teilwicklungen Zwischen¬ räume auf. Die Zwischenräume der jeweiligen Scheibenspulen bilden dabei axiale Kühlkanäle. Die Wicklung kann in Gießharz vergossen sein. In der Praxis hat sich gezeigt, daß das Ver¬ gießen der Scheibenspulen sehr problematisch ist. Eine Lösung hierzu ist in dem deutschen Gebrauchsmuster nicht angegeben.A winding for a transformer is known from German utility model 71 26 814, which consists of axially strung, individually wound disc coils. The individual disk coils have interspaces between their inner and outer partial windings lying coaxially one inside the other. The spaces between the respective disc coils form axial cooling channels. The winding can be cast in resin. In practice it has been found that the casting of the disc coils is very problematic. A solution to this is not given in the German utility model.
Bisher wurden daher eine innere und eine äußere Gießharzspule getrennt hergestellt, die koaxial ineinander gefügt und mecha¬ nisch miteinander verbunden wurden, sodaß zwischen den zwei Gießharzspulen ein konzentrischer Kühlkanal gegeben war.So far, therefore, an inner and an outer cast resin coil have been produced separately, which have been coaxially joined and mechanically connected to one another, so that a concentric cooling channel was provided between the two cast resin coils.
Aus der US-A- 4 129 938 ist ein Verfahren zur Herstellung einer vergossenen Wicklung aus Drahtleiter mit Kühlkanälen bekannt. Dazu wird nach einer vorgegebenen Anzahl von inneren Windungen zunächst ein durchtränkbares Vlies auf die Wicklung aufgelegt. Es folgt das Auflegen von Kühlkanäle bildenen Formkörpern und eine darauf angebrachte weitere Lage des durchtränkbaren Vlie- ses. Hiernach wird eine äußere Teilwicklung aufgebracht. Die gesamte Wicklung wird vergossen, wobei nach dem Verguß die Formkörper entfernt werden. Es entstehen dabei in der Wicklung gleichmäßig über den Umfang verteilte axiale Kühlkanäle. Die Anwendung dieser bekannten Wickeltechnik bei einer Anordnung von mehreren Scheibenspulen ist jedoch nicht möglich, da die jeweils in den einzelnen Scheibenspulen verwendeten Formkörper nur schwer entfernbar wären. Darüber hinaus ist die Ausrichtung der Zwischenräume der einzelnen Scheibenspulen zueinander erschwert.From US-A-4 129 938 a method for producing a cast winding from a wire conductor with cooling channels is known. For this purpose, after a predetermined number of inner turns, an impregnable fleece is first placed on the winding. This is followed by the placement of moldings forming cooling channels and a further layer of the soaked fleece attached thereon. An outer partial winding is then applied. The entire winding is cast, the molded articles being removed after the casting. This creates axial cooling channels distributed evenly over the circumference in the winding. However, the use of this known winding technology in an arrangement of several disc coils is not possible because the molded articles used in the individual disk coils would be difficult to remove. In addition, the alignment of the spaces between the individual disc coils with each other is difficult.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem aus mehreren Scheibenspulen aufgebaute Wicklungen mit Kühlkanälen hergestellt werden können. Eine weitere Aufgabe ist, eine verbesserte Gießharzspule mit Band- leitern anzugeben.The invention is therefore based on the object of specifying a method with which windings made up of a plurality of disc coils with cooling channels can be produced. Another task is to provide an improved cast resin spool with strip conductors.
Die erstgenannte Aufgabe wird mit einem Verfahren gemäß den Merkmalen des Anspruchs 1 gelöst. Auf diese Weise ist ein praktikables Verfahren gegeben, mit dem die Gießharzspule hergestellt werden kann. Eine nach diesem Verfahren herge¬ stellte Spule zeichnet sich durch eine hohe mechanische Festig¬ keit, sowie eine gute Kühlwirkung aus. Nach dem Verfahren lassen sich insbesondere Scheibenspulen mit mehreren konzen¬ trisch angeordneten sektorförmigen Kühlkanälen in einfacher Weise herstellen. Hierdurch ergibt sich ein wesentlich ver¬ besserte Kühlmöglichkeit der Scheibenspulen im Betrieb.The first-mentioned object is achieved with a method according to the features of claim 1. In this way, there is a practical method with which the cast resin coil can be produced. A coil produced by this method is characterized by a high mechanical strength and a good cooling effect. In particular, disk coils with a plurality of concentrically arranged sector-shaped cooling channels can be produced in a simple manner by the method. This results in a significantly improved possibility of cooling the disc coils during operation.
*_* _
Es ist günstig, wenn vor dem Vergießen zumindest in den zwi¬ schen den Abstandskörpern liegenden Umfangsabschnitten eine durchtränkbare Materiallage an den Teilwicklungen aufgebracht wird. Dies kann beispielsweise durch das Aufwickeln eines Vlieses am gesamten Umfang erfolgen. Dadurch werden einerseits die jeweiligen Teilwicklungen vor Verletzungen geschützt, wenn der Formkörper eingeführt wird und andererseits wird eine genau definierte Wandstärke des Kühlkanals zu den Teilwicklungen er¬ zielt, wodurch wiederum eine Verbesserung der Isolationswerte gegeben ist. Da zur Isolation keine Trennfolien verwendet wer¬ den, entstehen an der Wand des Kühlkanals auch keine zusätzli¬ chen Potentialgrenzflächen. Werden die jeweiligen Scheibenspulen mit ihren ιeι wιcκ ungen fortlaufend aus einem Leiter gewickelt, so erübrigt sich eine spätere Verschaltung der getrennten Teilwicklungen. Bevorzugt ist das Verfahren mit einem Bandleiter anzuwenden, der bei- spielsweise aus Kupfer oder Aluminium besteht.It is expedient if, before the encapsulation, an impregnable material layer is applied to the partial windings, at least in the peripheral sections lying between the spacers. This can be done, for example, by winding a fleece over the entire circumference. On the one hand, this protects the respective partial windings from injuries when the molded body is inserted, and on the other hand a precisely defined wall thickness of the cooling duct to the partial windings is achieved, which in turn improves the insulation values. Since no separating foils are used for the insulation, there are no additional potential interfaces on the wall of the cooling channel. If the respective disc coils with their ιeι wιcκ ungen are continuously wound from a conductor, then a later connection of the separate partial windings is unnecessary. The method is preferably to be used with a strip conductor which consists, for example, of copper or aluminum.
Die weitere Aufgabe wird mit einer Gießharzspule gemäß den Merkmalen des Anspruchs 5 gelöst. Eine derartige Gießharzspule weist eine nur geringe Spannungsbeanspruchung am Kühlkanal auf, da zwischen den Teilwicklungen am Kühlkanal , die bevorzugt fortlaufend aus einem Bandleiter gewickelt sind, nur die geringe Windungsspannung anliegt. Auf diese Weise kann die Wandstärke des Kühlkanals besonders dünn bemessen werden, was wiederum zu einer verbesserten Kühlung beiträgt. Dabei wird auch Material gespart, wodurch das Gewicht der Spule verringert wird.The further object is achieved with a cast resin coil according to the features of claim 5. Such a cast resin coil has only a slight stress on the cooling channel, since only the low winding voltage is present between the partial windings on the cooling channel, which are preferably continuously wound from a strip conductor. In this way, the wall thickness of the cooling channel can be dimensioned to be particularly thin, which in turn contributes to improved cooling. This also saves material, which reduces the weight of the spool.
Weitere Vorteile der Erfindung werden nachstehend anhand eines in der Zeichnung gezeigten Ausführungsbeispieles beispielhaft n her erläutert. Es zeigen:Further advantages of the invention are explained below using an exemplary embodiment shown in the drawing. Show it:
FIG 1 eine Gießharzspule im Querschnitt und1 shows a cast resin coil in cross section and
FIG 2 die Gießharzspule nach FIG 1. im Längsschnitt entlang der Linie II-II .2 shows the cast resin coil according to FIG. 1 in a longitudinal section along the line II-II.
Der Querschnitt in FIG 1 ist in der Ebene eines Leiters ge¬ wählt, der als Band- oder Drahtleiter ausgebildet sein kann. Die Gießharzspule 1 weist eine innere erste und eine äußere zweite Teilwicklung 3 bzw. 5 auf, die konzentrisch ineinander angeordnet sind. Die innere Teilwicklung 3 kann dabei auf einem Spulenkörper angeordnet oder auch selbsttragend gewickelt sein.The cross section in FIG. 1 is selected in the plane of a conductor, which can be designed as a strip or wire conductor. The cast resin coil 1 has an inner first and an outer second partial winding 3 and 5, which are arranged concentrically one inside the other. The inner partial winding 3 can be arranged on a bobbin or wound self-supporting.
Auf dem Umfang der inneren Teilwicklung 3 kann wahlweise eine durchtränkbare Materiallage 7a aufgebracht sein (strichliert dargestellt). Es schließen sich in radialer Richtung des wei- teren zunächst Abstandskörper 11, 11a, 11b eine weitere Mate¬ riallage 7b und die äußere Teilwicklung 5 an. Als Materiallage 7a, 7b eignen sich z.B. Matten aus Glasfaser, die durch ihre Herstellung eine vorgegebene Dicke aufweisen. Die Abstands- körper 11, 11a, 11b sind derart auf der inneren Teilwicklung 3 angeordnet, daß sie sektorförmige Zwischenräume 8 zwischen der inneren und der äußeren Teilwicklung 3 und 5 bilden. Die Dicke der Abstandskörper 11 bestimmt dabei den Abstand zwischen den Teilwicklungen 3 und 5. Mehrere axial aneinander liegende Zwi- schenräume 8 bilden jeweils einen Kühlkanal 9. Die Material¬ lagen 7a und 7b bestimmen dabei die Wandstärke vom Kühlkanal 9 zum Leiter der jeweiligen Teilwicklung 3, 5.A soakable material layer 7a can optionally be applied to the circumference of the inner partial winding 3 (shown in broken lines). They close in the radial direction of the First, spacers 11, 11a, 11b add a further material layer 7b and the outer partial winding 5. Suitable material layers 7a, 7b are, for example, mats made of glass fiber, which have a predetermined thickness due to their production. The spacers 11, 11a, 11b are arranged on the inner partial winding 3 in such a way that they form sector-shaped gaps 8 between the inner and the outer partial winding 3 and 5. The thickness of the spacer bodies 11 determines the distance between the partial windings 3 and 5. A plurality of axially adjacent intermediate spaces 8 each form a cooling channel 9. The material layers 7a and 7b determine the wall thickness from the cooling channel 9 to the conductor of the respective partial winding 3 , 5th
Im vorliegenden Beispiel sind die Teilwicklungen 3 und 5 fort- laufend aus einem Leiter 13a gewickelt. Dabei kann auch zwei- lagig gewickelt werden, wobei die zweite Lage 13b eine Isolier¬ lage oder auch ein gegen den Leiter 13a isolierter weiterer Leiter sein kann. Die Zwischenräume 8 sind sektorförmig nach Art von Kreisringabschnitten ausgebildet. Das Herausführen des Leiters 13a erfolgt in bekannter Art und Weise an einem Stirn¬ teil 14 der Gießharzspule 1, an dem ein Anschlußelement 15 an¬ geordnet ist. Es ist auch eine Verschaltung des Leiters 13a innerhalb des Stirnteils 14 mit arrderen Leitern möglich.In the present example, the partial windings 3 and 5 are continuously wound from a conductor 13a. It is also possible to wind in two layers, the second layer 13b being an insulating layer or else a further conductor insulated from the conductor 13a. The spaces 8 are sector-shaped in the manner of circular ring sections. The conductor 13a is led out in a known manner on a front part 14 of the cast resin coil 1, on which a connecting element 15 is arranged. It is also possible to connect the conductor 13a within the end part 14 to arrder conductors.
Die Abstandskörper 11, 11a, 11b können auch direkt zwischen den Teilwicklungen 3 und 5 ohne Zwischenfügung einer Materiallage 7a, 7b angeordnet sein, so daß die Materiallagen 7a, 7b nur im Bereich der Zwischenräume 8 an den Teilwicklungen 3 und 5 an¬ liegen.The spacers 11, 11a, 11b can also be arranged directly between the partial windings 3 and 5 without the interposition of a material layer 7a, 7b, so that the material layers 7a, 7b only lie against the partial windings 3 and 5 in the area of the spaces 8.
Die in FIG 2 gezeigte Giehßharzspule 17 ist aus mehreren anein¬ ander gefügten Scheibenspulen 17 aufgebaut, die beispielhaft aus einem Bandleiter gewickelt sind. Die Scheibenspulen 17 können auch aus einem Drahtleiter gewickelt sein. Die einzelnen Scheibenspulen 17 sind axial aneinandergefügt, wobei zwischen den einzelnen Scheibenspulen 17 (wie gestrichelt dargestellt ist) Distanzteile 19 eingelegt sein können. Im ge¬ zeigten Ausführungsbeispiel ist zu erkennen, daß sich die Ma- teriallagen 7a, 7b nur über die axiale Breite der Scheiben¬ spulen 17 erstrecken. Werden die Materiallagen 7a, 7b dagegen nachträglich in die von den Abstandskörpern 11a, 11b gebildeten sektorförmigen Zwischenräume der bereits aneinandergefügten Scheibenspulen eingeführt, so können sich die Materiallagen 7a, 7b auch über die volle Länge der Anordnung erstrecken (sinnge¬ mäße Ausführung wie Distanzlage 20).The cast resin coil 17 shown in FIG. 2 is constructed from a plurality of disc coils 17 joined to one another, which are wound, for example, from a strip conductor. The disk coils 17 can also be wound from a wire conductor. The individual disk coils 17 are joined axially, it being possible for spacer parts 19 to be inserted between the individual disk coils 17 (as shown in dashed lines). In the exemplary embodiment shown, it can be seen that the material layers 7a, 7b only extend over the axial width of the disc coils 17. If, on the other hand, the material layers 7a, 7b are subsequently inserted into the sector-shaped spaces formed by the spacers 11a, 11b of the disc coils already joined together, the material layers 7a, 7b can also extend over the full length of the arrangement (analogous design as spacer layer 20) .
Eine derartige Gießharzspule 1 weist eine sehr hohe mechanische Festigkeit aus, da die Teilwicklungen 3 und 5 nicht mehr wie beim Stand der Technik einzeln mechanisch miteinander verbunden sind, sondern eine Baueinheit bilden. Insbesondere ist jedoch die elektrische Festigkeit speziell im Bereich der Kühlkanäle 9 zu den Teilwicklungen 3 und 5 verbessert. Dies gilt insbesonde¬ re für eine Ausführung mit Bandleiter, da hier zwischen den Teilwicklungen 3 und 5 nur noch die geringe Windungsspannung auftritt, die eine Verringerung der Wandstärke des Kühlkanals 9 erlaubt. Dadurch ist jedoch auch eine verbesserte Kühlung der Teilwicklungen 3 und 5 möglich.Such a cast resin coil 1 has a very high mechanical strength, since the partial windings 3 and 5 are no longer mechanically connected to one another as in the prior art, but form a structural unit. In particular, however, the electrical strength, especially in the area of the cooling channels 9 to the partial windings 3 and 5, is improved. This applies in particular to an embodiment with a strip conductor, since here only the low winding voltage occurs between the partial windings 3 and 5, which allows a reduction in the wall thickness of the cooling channel 9. However, this also enables improved cooling of the partial windings 3 and 5.
Die einzelnen Teilwicklungen der Scheibenspulen 17 können fort¬ laufend aus einem Leiter 13a gewickelt sein, so daß kein zu¬ sätzlicher äußerer Schaltungsaufwand entsteht. Der Übergang des Leiters 13a von der inneren Teilwicklung 3 zur äußeren Teil- wickluπg 5 erfolgt vorzugsweise im Bereich der Abstandskörper lla, 11b, wobei die Bereiche nach dem Vergießen Verbindungs¬ stege 21 zwischen den Teilwicklungen 3 und 5 bilden. Die Über¬ gänge der einzelnen Leiter der jeweiligen Scheibenspulen 17 können dabei jeweils um einen Steg in Umfangsrichtung versetzt angeordnet werden. Auf diese Weise können auch Spannungsbean- spruchungen zwischen den Übergängen verringert werden. Die radiale Höhe der Kühlkanäle 9 wird im wesentlichen durch die Abstandskörper 11, 11a, 11b bestimmt. Diese Höhe liegt im Be¬ reich von 5 bis 50 mm, bevorzugt im Bereich von 10 bis 20 mm. Als Abstandskörper 11, 11a, 11b eignen sich beispielsweise Leisten, die auch ein Profil zum Führen der Formkörper auf¬ weisen können. Es können auch mehr als zwei Teilwicklungen 3, 5 konzentrisch zueinander angeordnet sein, wobei dann jeweils zwischen den benachbarten Teilwicklungen Kühlkanäle angeordnet sind.The individual partial windings of the disk coils 17 can be continuously wound from a conductor 13a, so that no additional external circuitry is required. The transition of the conductor 13a from the inner partial winding 3 to the outer partial winding 5 preferably takes place in the region of the spacers 11a, 11b, the regions forming connecting webs 21 between the partial windings 3 and 5 after the casting. The transitions of the individual conductors of the respective disk coils 17 can each be arranged offset in the circumferential direction by a web. In this way, stresses between the transitions can also be reduced. The radial height of the cooling channels 9 is essentially determined by the spacers 11, 11a, 11b. This height is in the range from 5 to 50 mm, preferably in the range from 10 to 20 mm. As spacers 11, 11a, 11b, for example, strips are suitable which can also have a profile for guiding the shaped bodies. More than two partial windings 3, 5 can also be arranged concentrically to one another, cooling channels then being arranged between the adjacent partial windings.
Zum Herstellen einer Gießharzspule kann folgendermaßen ver¬ fahren werden:The following can be used to produce a cast resin coil:
Zunächst werden die einzelnen Scheibenspulen 17 hergestellt. Dazu wird eine erste Teilwicklung 3 aus einem oder mehrerenFirst, the individual disc coils 17 are manufactured. For this purpose, a first partial winding 3 consists of one or more
Leitern 13a gewickelt, auf die eine oder mehrere Teilwicklungen 5, jeweils unter Zwischenfügung von einzelnen Abstandskörpern 11, 11a, 11b gewickelt werden.Conductors 13a are wound, on which one or more partial windings 5 are wound, each with the interposition of individual spacers 11, 11a, 11b.
Die Abstandskörper 11, 11a, 11b sind dabei derart über den Um¬ fang der ersten Teilwicklung 3 verteilt angeordnet, daß sektor- förmige, kreisringabschnittförmige Zwischenräume 8 gebildet werden. Das Anordnen kann während des Wickelvorgangs erfolgen. Ist eine vorgegebene Anzahl von Scheibenspulen 17 hergestellt, so werden diese axial aneinandergefügt, wobei die Zwischenräume 8 deckungsgleich ausgerichtet werden und axiale Kühlkanäle 9 bilden. Wie bereits oben beschrieben, können dabei die Wick¬ lungsübergänge des Leiters 13a von Scheibenspule 17 zu Schei¬ benspule 17 in Umfangrichtung versetzt zueinander angeordnet werden. Anschließend wird in jeden Kühlkanal 9 mindestens jeweils ein Formkörper eingefügt, der sich axial über die gesamte Länge der späterem Gießharzspule erstreckt, wodurch die Scheibenspulen 17 zusätzlich ausgerichtet und fixiert werden. Die verwendeten Formkörper können verlierbar oder wiederverwendbar sein. Ihre Form ist entsprechend der ge- wünschten Kühlkanalform vorgegeben. Die Kühlkanäle 9 werden, insbesondere an ihren offen Enden, gegen das Eindringen von Gießharz abgedichtet.The spacers 11, 11a, 11b are arranged so distributed over the circumference of the first partial winding 3 that sector-shaped, annular-segment-shaped spaces 8 are formed. The arrangement can take place during the winding process. If a predetermined number of disk coils 17 are produced, they are joined axially to one another, the interspaces 8 being aligned and forming axial cooling channels 9. As already described above, the winding transitions of the conductor 13a from disk coil 17 to disk coil 17 can be arranged offset to one another in the circumferential direction. Then at least one shaped body is inserted into each cooling channel 9, which extends axially over the entire length of the later cast resin coil, as a result of which the disk coils 17 are additionally aligned and fixed. The moldings used can be lost or reusable. Their shape is according to the desired cooling channel shape. The cooling channels 9 are sealed, in particular at their open ends, against the ingress of casting resin.
Es folgt das Vergießen der aneinandergefügten Scheibenspulen 17 in an sich bekannter Art und Weise. Dazu werden die aneinander¬ gefügten Scheibenspulen 17 mit den Formkörpern in einer Vergu߬ form angeordnet und mit einem Gießharz vergossen. Dies erfolgt mit den dem Fachmann allgemein bekannten Mitteln und Verfah- rensweisen. Nach dem Verguß und der Aushärtung des Vergußmate¬ rials werden die Vergußform und die Formkörper entfernt. Sind die Formkörper wiederverwendbar, so können diese beispielsweise herausgeschlagen oder herausgedrückt werden. Verlierbare Form¬ körper können beispielsweise durch Zerstörung oder Erwärmung entfernt werden.This is followed by casting the disc coils 17 joined together in a manner known per se. For this purpose, the disc coils 17 which are joined to one another are arranged with the shaped bodies in a casting mold and cast with a casting resin. This is done using the means and procedures generally known to those skilled in the art. After the potting and the curing of the potting material, the potting mold and the shaped bodies are removed. If the moldings are reusable, they can be knocked out or pushed out, for example. Moldings that can be lost can be removed, for example, by destruction or heating.
Bevorzugt wird vor dem Vergießen zumindest in den zwischen den Abstandskörper 11, 11a, 11b liegenden Umfangsabschnitten die durchtränkbare Materiallage an den Teilwicklungen 3 und 5 (wie bereits oben beschrieben) aufgebracht. Die Materiallage 7a, 7b kann jedoch auch nach dem Aneinanderfügen der Scheibenspulen 17 angebracht werden, indem die Kühlkanäle 9 mit der Materiallage 7a, 7b ausgekleidet werden. Dies kann gegebenenfalls auch mit Hilfe der Formkörper erfolgen, auf die die Materiallage aufge- legt wird. Preferably, the soakable material layer is applied to the partial windings 3 and 5 (as already described above) at least in the circumferential sections lying between the spacers 11, 11a, 11b. However, the material layer 7a, 7b can also be applied after the disc coils 17 have been joined together, in that the cooling channels 9 are lined with the material layer 7a, 7b. If necessary, this can also be done with the aid of the molded bodies on which the material layer is placed.

Claims

Patentansprüche Claims
1. Verfahren zum Herstellen einer aus mehreren axial aneinander geschichteten Scheibenspulen (17) bestehenden Gießharzspule (1) mit folgenden Schritten: a) Herstellen der einzelnen Scheibenspulen (17) durch Wickeln einer aus einem oder mehreren Leitern (13a) bestehenden ersten Teilwicklung (3), auf die eine oder mehrere weitere Teilwicklungen (5) jeweils unter Zwischenfügung von ein- zelnen Abstandskörpern (11,11a,11b) , durch die sektorförmige Zwischenräume (8) gebildet werden, gewickelt werden, b) axiales Aneinanderfügen der Scheibenspulen (17) und deckungsgleiches Ausrichten der sektorförmigen Zwischenräume (8) zum Bilden von axialen Kühlkanälen (9), c) Einführen von jeweils mindestens einem Formkörper in jeden1. A method for producing a cast resin coil (1) consisting of a plurality of axially layered disc coils (17), with the following steps: a) producing the individual disc coils (17) by winding a first partial winding (3) consisting of one or more conductors (13a) , on which one or more further partial windings (5) are wound with the interposition of individual spacers (11, 11a, 11b), through which sector-shaped spaces (8) are formed, b) the disc coils (17) and Alignment of the sector-shaped spaces (8) to form axial cooling channels (9), c) inserting at least one shaped body into each
Kühlkanal (9), d) Vergießen der aneinandergefügten Scheibenspulen (17), und e) Entfernen der Formkörper aus den Kühlkanälen (9).Cooling channel (9), d) casting the disc coils (17) joined together, and e) removing the shaped bodies from the cooling channels (9).
2. Verfahren nach Anspruch 1, bei dem vor dem Vergießen zu¬ mindest in den zwischen den Abstandskörpern (11,11a,11b) lie¬ genden U fangsabschnitten eine durchtränkbare Materiallage (7a, 7b) an den Teilwicklungen (3,5) aufgebracht wird.2. The method according to claim 1, in which a soakable material layer (7a, 7b) is applied to the partial windings (3, 5) before the potting, at least in the circumferential sections lying between the spacers (11, 11a, 11b) .
3. Verfahren nach Anspruch 1 oder 2, wobei die Teilwicklungen (3 und 5) jeder Scheibenspule (17) fortlaufend aus einem Leiter (13a) gewickelt werden.3. The method according to claim 1 or 2, wherein the partial windings (3 and 5) of each disk coil (17) are continuously wound from a conductor (13a).
4. Verfahren nach einem der Ansprüche 1 bis 3, wobei der Leiter (13a) ein Bandleiter ist.4. The method according to any one of claims 1 to 3, wherein the conductor (13a) is a strip conductor.
5. Gießharzspule (1) für einen Transformator, umfassend axial aneinandergefügte Scheibenspulen (17), die jeweils aus Band¬ leiter (13) gewickelt sind, wobei jede Scheibenspule (17) min- destens eine innere und eine diese konzentrisch umgebende äußere Teilwicklung (3 bzw. 5) aufweist, zwischen denen sek- torförmige Zwischenräume (8) gebildet sind, wobei die sektor- förmigen Zwischenräume (8) der einzelnen Scheibenspulen (17) deckungsgleich ausgerichtet sind und alle Scheibenspulen (17) gemeinsam mit Gießharz vergossen sind, so daß die sektorför- migen Zwischenräume (8) jeweils einen durchgehenden Kühlkanal (9) bilden, dessen Wandstärke an den jeweiligen Bandleitern (13a) durch eine durchtränkbare Materiallage (7a,7b) vorgege¬ ben ist. 5. Cast resin coil (1) for a transformer, comprising disc coils (17) which are axially attached to one another and are each wound from a strip conductor (13), each disc coil (17) at least one inner and one concentrically surrounding it has outer partial winding (3 or 5), between which sector-shaped gaps (8) are formed, the sector-shaped gaps (8) of the individual disk coils (17) being aligned and all the disk coils (17) cast together with casting resin are so that the sector-shaped gaps (8) each form a continuous cooling channel (9), the wall thickness of which is predetermined on the respective strip conductors (13a) by a layer of material (7a, 7b) that can be soaked.
EP91906470A 1991-03-21 1991-03-21 Process for producing cast resin coils and cast resin coils thus produced Expired - Lifetime EP0576418B1 (en)

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Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5644231A (en) * 1996-03-04 1997-07-01 Schlumberger Technology Corporation High pressure magnetic antenna assembly
US7023312B1 (en) 2001-12-21 2006-04-04 Abb Technology Ag Integrated cooling duct for resin-encapsulated distribution transformer coils
US7688170B2 (en) * 2004-06-01 2010-03-30 Abb Technology Ag Transformer coil assembly
FR2875965B1 (en) * 2004-09-30 2008-09-05 Valeo Equip Electr Moteur ROTATING ELECTRICAL MACHINE WITH ROTOR COOLING
US7719397B2 (en) 2006-07-27 2010-05-18 Abb Technology Ag Disc wound transformer with improved cooling and impulse voltage distribution
US7508289B1 (en) * 2008-01-11 2009-03-24 Ise Corporation Cooled high power vehicle inductor and method
DE112009005222B4 (en) * 2009-09-11 2022-12-29 Hitachi Energy Switzerland Ag Transformer with a heat pipe and method of manufacturing a transformer
US8547193B2 (en) * 2009-10-21 2013-10-01 Mitsubishi Electric Corporation Stationary induction apparatus
US9640314B2 (en) 2010-04-07 2017-05-02 Abb Schweiz Ag Outdoor dry-type transformer
BR112013005110A2 (en) * 2010-09-01 2016-05-10 Abb Technology Ag cooled transformer with at least one strap winding
EP2487697A1 (en) * 2011-02-08 2012-08-15 ABB Technology AG Dry-type transformer and method of manufacturing a dry-type transformer
CN102360833A (en) * 2011-05-19 2012-02-22 云南通变电器有限公司 Cellular epoxy resin insulation body for dry transformer
EP2549495B1 (en) * 2011-07-18 2018-05-23 ABB Schweiz AG Dry type transformer
US9257229B2 (en) * 2011-09-13 2016-02-09 Abb Technology Ag Cast split low voltage coil with integrated cooling duct placement after winding process
WO2017040303A1 (en) * 2015-08-29 2017-03-09 Abb Schweiz Ag Transformer, coil assembly and spacer

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE760347C (en) * 1941-02-23 1954-07-05 Siemens Schuckertwerke A G Coil treated with chlorinated naphthalenes or mixtures of isomeric chloronaphthalenes, especially soaked and coated coils for electrotechnical purposes
GB936380A (en) * 1961-07-25 1963-09-11 Licentia Gmbh Improvements relating to electrical coils
DE1258966B (en) * 1964-04-27 1968-01-18 May & Christe Ges Mit Beschrae Air-cooled plastic transformer
DE2104112C3 (en) * 1971-01-29 1979-05-10 Transformatoren Union Ag, 7000 Stuttgart Process for the production of cooling channels in a winding encapsulated in synthetic resin
DE2117204C3 (en) * 1971-04-08 1981-09-10 Transformatoren Union Ag, 7000 Stuttgart High-voltage winding encased with synthetic resin for transformers, inductors, and the like.
US3668583A (en) * 1971-05-10 1972-06-06 Gen Electric Techniques for casting encapsulated coils
DE7126814U (en) * 1971-07-13 1972-03-16 Transformatoren Union Ag WINDING FOR TRANSFORMERS, REACTOR COILS AND THE LIKE.
US3708875A (en) * 1971-09-17 1973-01-09 Westinghouse Electric Corp Methods of constructing electrical inductive apparatus
US4129938A (en) * 1975-08-25 1978-12-19 Hariolf Hagenbucher Method of making tubular coils with cooling and insulating channels
JPS582012A (en) * 1981-06-25 1983-01-07 Matsushita Electric Ind Co Ltd Molded coil
DE3138909A1 (en) * 1981-09-30 1983-04-14 Transformatoren Union Ag, 7000 Stuttgart TRANSFORMER WITH COMPLETELY EMBEDDED IN RESIN
JPS60136210A (en) * 1983-12-23 1985-07-19 Kansai Electric Power Co Inc:The Electromagnetic induction device
JPS6190408A (en) * 1984-10-11 1986-05-08 Toshiba Corp Foil-wound transformer
US5034716A (en) * 1989-11-08 1991-07-23 Sundstrand Corporation Radial cooled autotransformer assembly
US5097241A (en) * 1989-12-29 1992-03-17 Sundstrand Corporation Cooling apparatus for windings
US5296829A (en) * 1992-11-24 1994-03-22 Electric Power Research Institute, Inc. Core-form transformer with liquid coolant flow diversion bands
US5461772A (en) * 1993-03-17 1995-10-31 Square D Company Method of manufacturing a strip wound coil to reinforce edge layer insulation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9216955A1 *

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US5588201A (en) 1996-12-31
WO1992016955A1 (en) 1992-10-01
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DE59102531D1 (en) 1994-09-15
TW205599B (en) 1993-05-11

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