EP2206128A1 - Procédé de production d'un enroulement de transformateur multicouche pourvu d'une couche d'isolation - Google Patents

Procédé de production d'un enroulement de transformateur multicouche pourvu d'une couche d'isolation

Info

Publication number
EP2206128A1
EP2206128A1 EP08848410A EP08848410A EP2206128A1 EP 2206128 A1 EP2206128 A1 EP 2206128A1 EP 08848410 A EP08848410 A EP 08848410A EP 08848410 A EP08848410 A EP 08848410A EP 2206128 A1 EP2206128 A1 EP 2206128A1
Authority
EP
European Patent Office
Prior art keywords
layer
winding
transformer winding
insulating
insulating material
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.)
Withdrawn
Application number
EP08848410A
Other languages
German (de)
English (en)
Inventor
Roland Hoffmann
Christian GRÜTTNER
Karl Zillmann
Benjamin Weber
Jörg NELGES
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.)
ABB Technology AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Publication of EP2206128A1 publication Critical patent/EP2206128A1/fr
Withdrawn legal-status Critical Current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
    • H01F41/122—Insulating between turns or between winding layers
    • 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
    • H01F27/323—Insulation between winding turns, between winding layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/064—Winding non-flat conductive wires, e.g. rods, cables or cords
    • H01F41/066—Winding non-flat conductive wires, e.g. rods, cables or cords with insulation
    • H01F41/068—Winding non-flat conductive wires, e.g. rods, cables or cords with insulation in the form of strip material
    • 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
    • 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

Definitions

  • the invention relates to a manufacturing method for a multi-layer transformer winding, wherein during or after winding a conductor layer around a winding body in each case a layer of electrical insulation material is applied to the radially outer surface thereof.
  • the invention relates to a multi-layer transformer winding, which can be produced by the method according to the invention.
  • the insulation layer is produced, for example, according to DE4445423 B4 by means of a band-shaped glass fabric which is wound several helically around the conductor layer to be insulated, this so-called glass roving being impregnated with liquid resin immediately before the winding process. After completion of the winding process of the entire transformer winding is heated to cure the resin, for example, to 160 0 C, and then cooled again to ambient temperature.
  • the manufacturing method of the type mentioned for a multilayer transformer winding characterized in that a dry fiber composite material is used as the insulating material and that this is connected by heating the transformer winding to a predetermined compound temperature to an insulating layer.
  • the delivery can take place, for example, in the form of a coil-shaped wound around a coil-shaped insulating material, which is particularly favorable for its further processing.
  • This band-shaped material is several helical to wrap around the insulating conductor layer, so that the desired design-related minimum insulation thickness is achieved to the entire circumference of the conductor layer. During the winding process, it must be ensured that the respective belts are wound as tightly as possible and without air inclusions.
  • a substrate for impregnation insulating materials are suitable, such as woven bands of glass, polyester or other insulation material with sufficient temperature stability with respect to the subsequent heating process.
  • the impregnating material may be, for example, a resin.
  • Such a material additive is, for example, the product "Expancel”, which exhibits a one-time, irreversible expansion phase at an expansion temperature of 160 0 C, for example. It is for the heating process in each case to select the higher temperature of composite and expansion temperature.
  • cavities between the individual conductors of a conductor layer can be present. It can also cavities have formed during the winding of the individual webs of the dry insulation material. Such cavities affect the insulating ability of the insulating material and are filled by such a material additive in an advantageous manner. Thus, the insulating ability of the entire insulation layer can be further increased and exceed the insulation capacity of a conventional, prepared in the wet state, insulation layer.
  • first of all a layer of electrical insulation material is applied to the radially outer surface of the winding body before the winding process of the radially innermost conductor layer.
  • At least one of the conductor layers is first applied to the radially outer surface of the winding, at least one cooling channel running in the axial direction, before the winding process begins.
  • Cooling ducts to carry away the heat loss generated during operation.
  • Such channels usually extend over the entire axial winding length.
  • Such a cooling channel can for example be formed from two telescoped tube elements and extends between two conductor layers around the entire circumference of the winding axis of the transformer winding along the entire axial length.
  • insulation material is applied to the radially outer surface of the cooling channel before the radially outwardly adjacent conductor layer is wound.
  • the insulation strength of the transformer winding can be further increased.
  • the object of the invention is also achieved by a multi-layer transformer winding with at least one layer of insulating material between the winding layers, wherein the insulating material is a dry fiber composite material which is connectable by heating the transformer winding to a predetermined composite temperature to an insulating layer.
  • the insulating material is a dry fiber composite material which is connectable by heating the transformer winding to a predetermined composite temperature to an insulating layer.
  • Such a winding can be produced particularly quickly due to the dry insulation material.
  • the insulation material contains a material additive which can be irreversibly expanded by heating for a first time to a specific expansion temperature.
  • the voltage resistance and the life of the insulating layer can be particularly increased, because any voids, which are present in the insulating material before heating the winding to the expansion or composite temperature, can be filled by the volume expansion upon reaching the expansion temperature.
  • the latter has a plurality of axially adjacent subareas, each having a plurality of radially superimposed conductor layers, wherein at least two of the conductor layers of the respective subregions contained therein are galvanically separated from one another in the boundary region in at least one conductor layer layer.
  • Fig. 1 is a manufactured first transformer winding before a first heating to composite temperature
  • Fig. 2 shows a manufactured second transformer winding after a first heating to expansion temperature
  • FIG. 1 shows a first transformer winding 10 produced according to the invention before the first heating to composite temperature in a schematic representation.
  • a winding body 11 which determines a clear inside diameter of the transformer winding to be manufactured, is positioned on a suitable and, not shown in FIG. 1, manufacturing platform.
  • a band-shaped, impregnated and dry fiber composite material which is provided for example on a roll from the supplier, wound in several helical layers around the winding body 11 until a predetermined minimum layer thickness of the insulation is reached.
  • a thread-like composite material for the winding process of a layer is selected so as to compensate for unevenness on the surface of the conductor layer and then proceed to a band-shaped composite material.
  • a winding operation takes place, for example, by means of a winding machine, not shown in FIG.
  • the first layer of insulating material 31 of the first transformer winding 10 is over the entire circumference of the winding body 11 and its entire axial length 14 covered with a personallygefel fürdi- bridge of the dry insulation material, the first winding 10 rotationally symmetrical about the imaginary axis of rotation 12th is.
  • the minimum layer thickness varies according to the dielectric strength of the insulating layer to be achieved, and may vary in the range of, for example, about 1 mm to about 20 mm. When winding it is important to ensure that as possible no air pockets are present in the wound insulation layer.
  • a first conductor layer 21 is applied, wherein a conductor surrounded by an insulating layer is applied helically over the entire winding length 14.
  • a second layer of insulating material 32 is applied analogously to the first layer of insulating material 31 on the first conductor layer 21, to which in turn a second conductor layer 22 is wound. It should be noted that the first conductor layer 21 and the second conductor layer 22 are electrically connected at one of the both ends of the winding 10.
  • cavities 40 may form between adjacent conductors and in the layers of insulating material 31, 32, 33 which reduce the insulation strength of the insulating layers. Such a reduction of the insulation strength does not affect the basic functionality of the insulation layers in a corresponding design of the transformer winding.
  • the fabricated transformer winding 10 is heated to a certain minimum temperature, which corresponds to the composite temperature and for resin-based insulation systems in the temperature range of, for example, 120 0 C to 160 0 C.
  • a heating process is preferably carried out in a furnace of suitable size, wherein the time of the heating is to be dimensioned such that the whole transformer winding is brought to set temperature.
  • furnace times in the range of 15 minutes to several hours may result, which is well known to the skilled person, however.
  • Fig. 2 shows a second fabricated transformer winding 50 having a similar winding structure as the first transformer winding 10, in contrast to this but after the first heating to a limit temperature.
  • the insulation material was previously added to an irreversibly expanding material additive upon first reaching the expansion temperature.
  • the limit temperature of the heating in this example corresponds to the higher temperature of composite and expansion temperature.
  • An addition of the material additive is preferably carried out by applying an additional layer of the material additive to the winding body 51 before applying the first layer of insulation material and by applying a further additional layer of the material additive after application of the first layer of insulation material.
  • additional layer of insulation material the procedure is analogous. But it is also readily conceivable that, for example, the impregnation of a band-shaped fiber composite material was already attached during the production of such a material additive.
  • Such an additive which irreversibly expands when an expansion temperature is reached for the first time is, for example, the product known on the market as "Expellel".
  • “Expancel” is characterized by the fact that in a gas-tight, only a few microns large plastic cover a precisely measured amount of a propellant is included. When this microsphere is heated or heated, the plastic shell softens, the propellant becomes gaseous and the microsphere expands irreversibly in a defined manner.
  • material additives with similar properties conceivable including those that work on other principles of action, such as expansion due to chemical processes.
  • FIG. 2 further shows that volume expansion of the material additive has taken place due to the preceding initial heating to the limiting temperature and the cavities 40 and the layers of insulating material 31, 32, 33 indicated in FIG now parts of the isolation area 80 are.
  • no cavities are present in the insulation region 80, which has a plurality of insulation layers between the conductor layers.
  • a further reduction of the volume of unfilled cavities in a fabricated winding can be further achieved that the heating process takes place in the oven under vacuum-like conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)

Abstract

L'invention concerne un procédé de production d'un enroulement de transformateur (10) multicouche, selon lequel une couche (32, 33) de matériau d'isolation électrique est appliquée sur la surface radialement extérieure d'une couche conductrice (21, 22, 23) pendant ou après l'enroulement de cette dernière autour d'un élément de bobinage (11). Le matériau d'isolation utilisé est un matériau composite sec à base de fibres. Par ailleurs, ce matériau d'isolation est lié sous la forme d'une couche d'isolation par chauffage de l'enroulement de transformateur (10) à une température de liaison prédéterminée. L'invention concerne en outre un enroulement de transformateur multicouche pouvant être produit par le procédé selon l'invention.
EP08848410A 2007-11-10 2008-10-25 Procédé de production d'un enroulement de transformateur multicouche pourvu d'une couche d'isolation Withdrawn EP2206128A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007053685A DE102007053685A1 (de) 2007-11-10 2007-11-10 Herstellungsverfahren für eine mehrlagige Transformatorwicklung mit Isolationsschicht
PCT/EP2008/009051 WO2009059705A1 (fr) 2007-11-10 2008-10-25 Procédé de production d'un enroulement de transformateur multicouche pourvu d'une couche d'isolation

Publications (1)

Publication Number Publication Date
EP2206128A1 true EP2206128A1 (fr) 2010-07-14

Family

ID=40278995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08848410A Withdrawn EP2206128A1 (fr) 2007-11-10 2008-10-25 Procédé de production d'un enroulement de transformateur multicouche pourvu d'une couche d'isolation

Country Status (5)

Country Link
US (1) US20100245017A1 (fr)
EP (1) EP2206128A1 (fr)
CN (1) CN101855684A (fr)
DE (1) DE102007053685A1 (fr)
WO (1) WO2009059705A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5399317B2 (ja) * 2010-05-18 2014-01-29 株式会社神戸製鋼所 リアクトル
EP2474986A1 (fr) * 2011-01-05 2012-07-11 ABB Technology AG Enroulement de transformateur
US9281098B2 (en) * 2011-02-09 2016-03-08 Waukesha Electric Systems, Inc. Dry type electrical insulation
DE102016200477A1 (de) * 2016-01-15 2017-07-20 Siemens Aktiengesellschaft Wicklungsanordnung mit festen Wicklungsabschnitten
DE102016200461A1 (de) * 2016-01-15 2017-07-20 Siemens Aktiengesellschaft Vertikale Wicklungsanordnung
CN106449078A (zh) * 2016-08-31 2017-02-22 芜湖金牛电气股份有限公司 一种变压器线圈的绕制方法
CN114141529B (zh) * 2021-12-15 2023-03-31 中国工程物理研究院流体物理研究所 一种用于脉冲磁体线圈的绕制工装及绕制方法

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DE1006918B (de) * 1955-04-19 1957-04-25 Basf Ag Verfahren zur Herstellung mit schaumfoermigen Kunststoffen isolierter elektrischer Leiter
US2942217A (en) * 1957-08-30 1960-06-21 Westinghouse Electric Corp Electrical coil
US3662461A (en) * 1970-05-04 1972-05-16 Chemetron Corp Method of making dry insulated inductive coil
DE2359876C3 (de) * 1973-01-17 1984-08-30 Sumitomo Electric Industries, Ltd., Osaka Verfahren zur Herstellung von Hochfrequenz-Koaxialkabeln
US4173747A (en) * 1978-06-08 1979-11-06 Westinghouse Electric Corp. Insulation structures for electrical inductive apparatus
DE3229480A1 (de) * 1982-08-06 1984-02-09 Transformatoren Union Ag, 7000 Stuttgart Trockentransformator mit in giessharz eingegossenen wicklungen
JPS59130413A (ja) * 1983-01-17 1984-07-27 Toshiba Corp 樹脂モ−ルドコイルの製造方法
JPS6091616A (ja) * 1983-10-25 1985-05-23 Toshiba Corp 注形コイル
DE3540537A1 (de) * 1985-11-15 1987-05-21 Klaus Kurt Koelzer Verstaerkungsmaterial
TW297798B (fr) * 1989-03-15 1997-02-11 Sumitomo Electric Industries
DE4445423B4 (de) 1994-12-20 2006-04-20 Abb Patent Gmbh Verfahren zum Herstellen von Wicklungen für einen Trockentransformator
GEP20022779B (en) * 1996-05-29 2002-08-26 Abb Ab Power Transformer/ Reactor
DE19839458C2 (de) * 1998-08-29 2001-01-25 Eichhoff Gmbh Verfahren zum Vergießen elektrischer Bauelemente in einem Gehäuse sowie mit aushärtbarer Vergußmasse vergossene Vorrichtung
US7023312B1 (en) * 2001-12-21 2006-04-04 Abb Technology Ag Integrated cooling duct for resin-encapsulated distribution transformer coils
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Also Published As

Publication number Publication date
DE102007053685A1 (de) 2009-05-14
US20100245017A1 (en) 2010-09-30
CN101855684A (zh) 2010-10-06
WO2009059705A1 (fr) 2009-05-14

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