EP0576418B1 - Procede de production de bobines en resine de coulee et bobines en resine de coulee ainsi produites - Google Patents

Procede de production de bobines en resine de coulee et bobines en resine de coulee ainsi produites Download PDF

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Publication number
EP0576418B1
EP0576418B1 EP91906470A EP91906470A EP0576418B1 EP 0576418 B1 EP0576418 B1 EP 0576418B1 EP 91906470 A EP91906470 A EP 91906470A EP 91906470 A EP91906470 A EP 91906470A EP 0576418 B1 EP0576418 B1 EP 0576418B1
Authority
EP
European Patent Office
Prior art keywords
winding
flat coils
partial
conductor
cast resin
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.)
Expired - Lifetime
Application number
EP91906470A
Other languages
German (de)
English (en)
Other versions
EP0576418A1 (fr
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/fr
Application granted granted Critical
Publication of EP0576418B1 publication Critical patent/EP0576418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 which consists of axially lined up, individually wound disc coils.
  • the individual disk coils have gaps formed by spacers between their inner and outer partial windings which are coaxially one inside the other.
  • the partial windings can be wound continuously from the same conductors.
  • the spaces between the respective disc coils form axial cooling channels.
  • the winding can be cast in resin. In practice it has been shown 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 an improved method with which windings made up of a plurality of disc coils with cooling channels can be produced. Another object 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 manufactured according to this process 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.
  • a soakable layer of material 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 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 3.
  • 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.
  • the cross section in FIG. 1 is selected in the plane of a conductor, which can be designed as a ribbon 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).
  • a further material layer 7b and the outer partial winding 5 follow.
  • Suitable material layers 7a, 7b are e.g. 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 spaces 8 between the inner and the outer partial winding 3 and 5.
  • the thickness of the spacers 11 determines the distance between the partial windings 3 and 5.
  • a plurality of axially adjacent 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, 5.
  • the partial windings 3 and 5 are continuously wound from a conductor 13a. It can also be wound in two layers, the second layer 13b being an insulating layer or also a further conductor insulated from the conductor 13a.
  • the spaces 8 are sector-shaped in the manner of circular ring sections educated.
  • the conductor 13a is brought out in a known manner on an end 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 other 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 abut the partial windings 3 and 5 in the region of the spaces 8.
  • the cast resin spool 1 shown in FIG. 2 is made up of a plurality of disc coils 17 joined together, 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).
  • 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 introduced 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 disc 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.
  • the individual disc coils 17 are manufactured.
  • a first partial winding 3 from one or several 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, whereby the disk coils 17 are additionally aligned and fixed.
  • the moldings used can be lost or reusable. Their shape is specified in accordance with 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 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 moldings are removed. If the moldings are reusable, they can be knocked out or pushed out, for example. Lossable molded body 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

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).

Claims (3)

  1. Procédé de fabrication d'une bobine en résine moulée (1) constituée de bobines en forme de disque (17) assemblées axialement les unes aux autres, comportant les phases suivantes :
    a) fabrication des bobines individuelles en forme de disque (17) par bobinage d'un premier enroulement partiel (3) constitué d'un ou de plusieurs conducteurs (13a), sur lequel est bobiné en continu avec le(s) même(s) conducteur(s) un ou plusieurs autres enroulements partiels (5) en insérant respectivement des corps d'écartement (11, 11a, 11b), par lesquels sont formés des espaces intermédiaires (8) de forme sectorielle,
    b) assemblage axial des bobines en forme de disque (17) et alignement coïncident des espaces intermédiaires (8) de forme sectorielle afin de former des canaux de refroidissement axiaux (9),
    c) introduction d'au moins un corps dans chaque canal de refroidissement (9),
    d) scellement des bobines en forme de disque (17) assemblées, les corps d'écartement (11, 11a, 11b) respectivement scellés formant des entretoises de liaison (21) entre les enroulements partiels (3, 5),
    e) retrait des corps des canaux de refroidissement (9),
    f) une couche de matière imprégnable (7a, 7b) étant appliquée avant le scellement sur les enroulements partiels (3, 5), au moins dans les parties périphériques situées entre les corps d'écartement (11, 11a, 11b), et
    g) le passage du/des conducteur(s) du premier enroulement partiel (3) vers l'autre enroulement partiel (5) étant effectué dans une entretoise de liaison (21) entre le corps d'écartement de cette dernière et un corps d'écartement supplémentaire (11a, 11b).
  2. Procédé selon la revendication 1, dans lequel le conducteur (13a) est un conducteur plat.
  3. Bobine en résine moulée (1) destinée à un transformateur, comprenant des bobines en forme de disque (17) assemblées axialement qui sont respectivement bobinées en continu avec le(s) même(s) conducteur(s) (13), chaque bobine en forme de disque (17) comportant au moins un enroulement partiel intérieur et un enroulement partiel extérieur entourant le premier de façon concentrique (3 et 5), entre lesquels sont formés des espaces intermédiaires (8) de forme sectorielle par des corps d'écartement (11, 11a, 11b), les espaces intermédiaires (8) de forme sectorielle des différentes bobines en forme de disque (17) étant alignés de façon coïncidente, et toutes les bobines en forme de disque (17) étant scellées ensemble avec de la résine moulée, de sorte que les espaces intermédiaires (8) de forme sectorielle constituent respectivement un canal de refroidissement traversant (9), dont l'épaisseur de paroi au niveau des conducteurs plats (13a) respectifs est prédéterminée par une couche de matière imprégnable (7a, 7b), et en ce que les corps d'écartement (11, 11a, 11b) forment des entretoises de liaison (21) entre les enroulements partiels (3, 5), une entretoise de liaison (21) comportant deux corps d'écartement (11a, 11b), entre lesquelles est(sont) guidé(s) le(s) conducteur(s) (13) de l'enroulement partiel intérieur vers l'enroulement partiel extérieur (3 et 5).
EP91906470A 1991-03-21 1991-03-21 Procede de production de bobines en resine de coulee et bobines en resine de coulee ainsi produites Expired - Lifetime EP0576418B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1991/000552 WO1992016955A1 (fr) 1991-03-21 1991-03-21 Procede de production de bobines en resine de coulee et bobines en resine de coulee ainsi produites

Publications (2)

Publication Number Publication Date
EP0576418A1 EP0576418A1 (fr) 1994-01-05
EP0576418B1 true EP0576418B1 (fr) 1994-08-10

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Family Applications (1)

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EP91906470A Expired - Lifetime EP0576418B1 (fr) 1991-03-21 1991-03-21 Procede de production de bobines en resine de coulee et bobines en resine de coulee ainsi produites

Country Status (5)

Country Link
US (1) US5588201A (fr)
EP (1) EP0576418B1 (fr)
DE (1) DE59102531D1 (fr)
TW (1) TW205599B (fr)
WO (1) WO1992016955A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7647692B2 (en) 2001-12-21 2010-01-19 Abb Technology Ag Method of manufacturing a transformer coil having cooling ducts

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FR2875965B1 (fr) * 2004-09-30 2008-09-05 Valeo Equip Electr Moteur Machine electrique tournante avec refroidissement du rotor
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
CN102696081B (zh) * 2009-09-11 2016-02-24 Abb研究有限公司 包括热管的变压器
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CN102360833A (zh) * 2011-05-19 2012-02-22 云南通变电器有限公司 干式变压器蜂窝状环氧树脂绝缘体
EP2549495B1 (fr) * 2011-07-18 2018-05-23 ABB Schweiz AG Transformateur à sec
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 (fr) * 2015-08-29 2017-03-09 Abb Schweiz Ag Transformateur, ensemble bobine et élément d'espacement
EP4386787A1 (fr) * 2022-12-13 2024-06-19 Hitachi Energy Ltd Ensemble d'enroulement pour un transformateur et procédé de fabrication d'un ensemble d'enroulement pour un transformateur

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7647692B2 (en) 2001-12-21 2010-01-19 Abb Technology Ag Method of manufacturing a transformer coil having cooling ducts

Also Published As

Publication number Publication date
US5588201A (en) 1996-12-31
DE59102531D1 (de) 1994-09-15
TW205599B (en) 1993-05-11
EP0576418A1 (fr) 1994-01-05
WO1992016955A1 (fr) 1992-10-01

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