EP0129819A1 - Procédé d'imprégnation et revêtement de bobinages électriques - Google Patents

Procédé d'imprégnation et revêtement de bobinages électriques Download PDF

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Publication number
EP0129819A1
EP0129819A1 EP84106959A EP84106959A EP0129819A1 EP 0129819 A1 EP0129819 A1 EP 0129819A1 EP 84106959 A EP84106959 A EP 84106959A EP 84106959 A EP84106959 A EP 84106959A EP 0129819 A1 EP0129819 A1 EP 0129819A1
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EP
European Patent Office
Prior art keywords
resins
dried
reduced pressure
winding
windings
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
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EP84106959A
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German (de)
English (en)
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EP0129819B1 (fr
Inventor
Helmut Dr. Markert
Wolfgang Dr. Rogler
Wolfgang Bendel
Friedrich Alber
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Siemens AG
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Siemens AG
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Priority to AT84106959T priority Critical patent/ATE24792T1/de
Publication of EP0129819A1 publication Critical patent/EP0129819A1/fr
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Publication of EP0129819B1 publication Critical patent/EP0129819B1/fr
Expired legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a method for impregnating and embedding electrical windings, in particular coils of transformers, by means of impregnating or casting resins based on polyepoxide-polyisocyanate mixtures in the presence of a reaction accelerator which is latent under processing conditions.
  • the impregnation and the potting or the insulation of windings in electrical machines and in coils of dry-type transformers are of great technical and economic importance.
  • reactive resin molding materials with high mechanical, thermal and electrical properties are required for this purpose. Special requirements are placed on the molding materials if, for example, the potential reduction in transformers is not supported by air cooling sections, but is to be largely laid in the reactive resin molding material.
  • the reaction resin molding materials are exposed to high mechanical and thermal loads if resistance to temperature changes down to -50 ° C is to be guaranteed and at the same time, for example in the case of transformers, the requirements of heat classes F to H are to be met.
  • EP / IC resins are used in curing, i.e. in the crosslinking, which generally takes place in the presence of accelerator systems (catalysts), give OX / ICR molding materials with excellent heat resistance (see for example: DE-AS 11 15 922, DE-OS 19 63 900 and DE-AS 23 59 386) .
  • EP / IC resins as impregnation resin for windings in electrical devices, in particular for rotating electrical machines, reference also being made to the possible use for transformers (see for example: DE-OS 24 44 458, DE- PS 26 55 367 and DE-OS 28 11 858). So far, however, no way has been shown on which a void-free impregnation and embedding of electrical windings, in particular in coils of dry transformers, can be carried out with EP / IC resins on an industrial scale and economically.
  • a fundamental problem in the impregnation and embedding of windings with EP / IC resins is that the polyisocyanates contained in the EP / IC resins react with water to form CO 2 ;
  • carbon dioxide leads to blowholes containing OX / ICR molding materials.
  • impregnations and embeddings of electrical windings cannot be used, in particular because of the occurrence of partial discharges under electrical stress.
  • An annoying CO 2 gas formation is sufficient even for small amounts of water. These can be introduced via components of the EP / IC resins, such as epoxy resins and fillers. The low water content in the windings is already sufficient to develop an annoying CO 2 gas formation.
  • the object of the invention is to find safe and economical conditions in terms of production technology with which the formation and impregnation and embedding of electrical windings by means of EP / IC resins and their crosslinking to give OX / ICR molding materials (in the presence of a latent reaction accelerator under processing conditions) is prevented by gas and shrink wicks.
  • the EP / IC resins are dried under reduced pressure and with stirring at temperatures up to 110 ° C.
  • the electrical windings are dried and with the dried EP / IC resins under reduced pressure Impregnated or cast pressure at temperatures up to 110 ° C, that the reduced pressure is released and an overpressure is applied and that the crosslinking reaction of the EP / IC resins is initiated via temperature generated in the electrical winding by current heat in the conductor and - depending on the heat of reaction - until demolding or post-curing of the impregnated or cast windings is controlled.
  • the EP / IC resins are first dried and degassed. So-called chemical drying or dewatering takes place, for which the polyisocyanates present in the EP / IC resins are used, which react with water with elimination of CO 2 .
  • the procedure is such that the EP / IC resins, including all additives, are treated at elevated temperature under reduced pressure and vigorous stirring until CO 2 evolution no longer takes place.
  • the latent reaction accelerator can be present in the EP / IC resin from the start or can be added to it after a certain pretreatment time. It has been shown that drying temperatures below 50 ° C are possible, but are uneconomical due to the long drying time required.
  • the EP / IC resin mixture is therefore advantageously treated for dewatering and degassing under reduced pressure and stirring at temperatures from 50 to 80 ° C .; at 80 ° C, for example, the drying is already finished after about 1 h. After drying, the EP / IC resins are kept under the conditions prevailing during the drying process until further processing, ie until the electrical windings are impregnated or potted.
  • the windings themselves are preferably dried and degassed at temperatures up to 80 ° C. and under reduced pressure, the drying and degassing being able to be advantageously supported by current heat in the electrical conductor.
  • the windings are then kept under the mentioned conditions for pressure and temperature until impregnation and embedding with the EP / IC resins, whereas the winding heating is switched off.
  • the impregnation and the encapsulation of the windings with the EP / IC resins is carried out in the process according to the invention under reduced pressure at temperatures up to 110 ° C .; the temperature of the EP / IC resins is preferably from room temperature to 80 ° C.
  • the reduced pressure is released and pressurization, preferably with 1 to 3 bar overpressure, is brought about.
  • the crosslinking of the EP / IC resins is then initiated by current heat in the conductor and controlled until the windings are removed from the mold or post-hardened.
  • the temperature generated by current heat in the conductor in the windings is preferably 60 to 140 ° C.
  • post-curing takes place in an annealing furnace at temperatures up to 220 ° C.
  • the method according to the invention for impregnating and embedding windings with EP / IC resins and their Networking to form OX / ICR materials also takes environmental protection requirements into account in an excellent manner. It is known that the epoxy and isocyanate compounds contained in the EP / IC resins can only be processed industrially for toxic reasons with special protective measures. For example, a MAK value of 0.02 ppm is given for isocyanates.
  • the critical process steps when using EP / IC resins are their preparation and their crosslinking up to gelation and post-curing, since the vapor pressures of the EP and IC components inevitably increase and the risk of environmental pollution is particularly great.
  • the windings impregnated or cast with EP / IC resins can therefore only be transported to the hardening furnace with technically complex protective measures.
  • environmental pollution can be avoided technically safely, since the preparation and processing of the EP / IC resins up to the post-curing is carried out in a single operation in technically customary plants, both under reduced pressure and under pressurization.
  • the curing of the windings can then be carried out under the usual protective measures, since at this point the EP / IC resins are already highly cross-linked.
  • Another advantage of the method according to the invention is the economical processing of the EP / IC resins.
  • the highly reactive and fast cross-linking EP / IC resins are fully used to drastically reduce machine and mold occupancy times compared to the current state of impregnation and embedding of windings with epoxy resins. This is mainly due to the simple and quick chemical drying and degassing of the EP / IC resins in the very short molding times of the windings impregnated or cast with the EP / IC resins.
  • EP / IC resin systems composed of the following components are suitable for the process according to the invention for the impregnation, embedding and insulation of electrical windings.
  • Relatively low-viscosity aliphatic, cycloaliphatic or aromatic epoxides and mixtures thereof are particularly suitable as polyepoxides.
  • Bisphenol A diglycidyl ether are preferred, bisphenol F diglycidyl ether, 3,4-epoxycyclohexylmethyl-3'.4'-epoxycyclohexane carboxylate, polyglycidyl ethers of phenol / formaldehyde - or cresol / formaldehyde novolak, polyglycidyl ethers of polyalkylene glycols, polyglycidyl ethers of linear polyurethanes, polyglycidyl esters of dimerized fatty acids and mixtures of these epoxy resins.
  • polyepoxides that can be used are hydrogenated bisphenol A or bisphenol F diglycidyl ether, hydantoin epoxy resins, triglycidyl isocyanurate, triglycidyl p-aminophenol, tetraglycidyl diaminodiphenyl methane, tetraglycidyl diaminodiphenyl ether (4) -glycidyl ether and tetrakisethane. Additional epoxies are described in the "Handbook of Epoxy Resins" by Henry Lee and Kris Neville, McGraw-Hill Book Company, 1967, and in the monograph by Henry Lee "Epoxy Resins", American Chemical Society, 1970.
  • Relatively low-viscosity aliphatic, cycloaliphatic or aromatic isocyanates and mixtures thereof are particularly suitable as polyisocyanates.
  • Isomer mixtures of 4,4'- and 2,4'-diphenylmethane diisocyanate, polyol-modified, are preferred Polyisocyanates and mixtures of liquid polyisocyanates with higher molecular weight polyisocyanates or carbodiimide polyisocyanates are used.
  • polyisocyanates that can be used are, for example, hexane-1,6-diisocyanate, cyclohexane-1,3-diisocyanate and isomers thereof, 4,4'-dicylohexylmethane diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate, 1,3-dimethylbenzene or other diisocyanate and isomers, 1- Nethylbenzene, 2,4-diisocyanate and isomers, naphthalene-1,4-diisocyanate, diphenyl ether-4,4'-diisocyanate and isomers, diphenylsulfone-4,4'-diisocyanate and isomers as well as tri- or higher functional isocyanates, such as 3.3 ', 4,4'-diphenylmethane tetraisocyanate.
  • isocyanates which are masked with phenol or cresol in the customary manner. Dimers and trimers of the polyvalent isocyanates mentioned can also be used. Such polyisocyanates have terminal free isocyanate groups and contain one or more uretdione and / or isocyanurate rings. Methods for making various types of such trimers and uretdiones are described, for example, in U.S. Patents 3,494,888, 3,108,100 and 2,977,370.
  • the EP / IC resins used in the process according to the invention can also contain further components, such as fillers, which, however, are generally not involved in the chemical reactions which lead to the OX / ICR molding material.
  • Particularly suitable fillers are mineral and fibrous fillers, such as quartz powder, quartz material, aluminum oxide, aluminum oxide trihydrate, glass powder, mica, kaolin, dolomite, graphite and carbon black as well as carbon fibers, glass fibers and textile fibers.
  • Dyes, stabilizers and adhesive Medium and other conventional additives can also be added to the EP / IC resins.
  • reaction accelerator which is latent under processing conditions is used here.
  • a reaction accelerator is understood to mean a catalyst which guarantees a sufficient service life of the EP / IC resins when impregnating or potting the windings and which reacts highly reactively during the subsequent crosslinking (curing) of the EP / IC resins.
  • Such latent reaction accelerators are particularly suitable boron trihalide amine complexes, such as the addition complexes described in DE-PS 26 55 367 of boron trichloride and tertiary amines of the formula Bel 3 ⁇ NR 1 R 2 R 3 , in which R 1 , R2 and R 3 are the same or are different organic, ie aliphatic, aromatic, heterocyclic or arylaliphatic radicals which - together or in pairs - can also belong to heterocyclic rings.
  • the analog complexes of boron trifluoride of the formula BF 3 .NR 1 R 2 R 3 are also suitable.
  • tertiary amines of the BF 3 and Bel3 complexes are dimethyloctylamine and dimethylbenzylamine; Morpholine compounds and imidazoles, such as N-methylmorpholine, N-ethylmorpholine, 1,2-dimethylimidazole and 1-benzyl-2-phenylimidazole, are also suitable for the formation of BC13 or BF 3 complexes.
  • Amines can also be used as latent reaction accelerators in the process according to the invention if they are obtained by adding organic electron acceptors which are customary in the production of EDA complexes, such as 1,2-dinitrobenzene or 7.7.8.8-tetracyano- 1.4-quinodimethane (TCNQ), are deactivated.
  • Uncomplexed amines can also be used if they give sufficient processing latitude, as is the case for example with 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole and N-cyanoethylmorpholine.
  • Onium salts for example tetraalkyl and tetraarylammonium tetraphenyl borates and phosphonum tetraphenyl borates, are also suitable for this process.
  • the latent reaction accelerator is advantageously used in proportions of 0.01 to 5% by weight, preferably 0.25 to 2.5% by weight, in each case based on the mass of the resin matrix.
  • the curing temperature and duration can be influenced in a manner known per se by the type and concentration of the reaction accelerator.
  • the reaction accelerator like the other additives, can be added to the EP / IC resin before chemical drying. But it can also be done in such a way that the reaction accelerator after drying the EP / IC resin, i.e. immediately before the impregnation or the encapsulation of the winding is added, preferably dissolved in one of the EP / IC resin components.
  • the electrical windings to be impregnated or cast by the method according to the invention can be produced, for example, from foils or strips of insulated conductors or conductors coated with insulators. These windings can also be mechanically reinforced or supported with fiber materials, for example in the form of fabrics, nonwovens or rowings.
  • Model overvoltage windings for dry-type transformers hereinafter referred to as transformets, consisting of four coils were made of aluminum conductors (0.1 mm thick, 50 mm wide) provided with polyimide film (thickness: 25 ⁇ m, width: 56 mm) and installed in casting molds.
  • the spaces to be filled with the EP / IC resins were 6 to 8 mm between the coils and between the coils and the mold wall and 12 to 15 mm at the sprue.
  • the transformers were provided with the electrical connections for the winding heating and placed in the casting tank, then the pressure in the casting tank was reduced to 0.1 mbar and a casting room temperature of 70 ° C. was set. Under these conditions, the transformets were dried and degassed for 1 to 2 hours, the drying of the windings being supported in part by current heat in the conductor. After the drying had ended, the winding heating was switched off.
  • the EP / IC resin in quantities of 25 to 100 kg, was processed in a tank above the casting tank attached mixing unit; EP / IC resin A was used.
  • the transformets were cast at a pressure of 0.06 to 0.1 mbar within 15 minutes. The reduced pressure was then released and an excess pressure of 3 bar was generated with dry nitrogen in the watering tank. Immediately afterwards, the crosslinking reaction of the EP / IC resin was initiated by direct current heating of the windings connected in series.
  • the heating current control which is matched to the heat of reaction in EP / IC resin crosslinking, was carried out via a computer, to which the average winding temperature was continuously fed.
  • Curve 10 shows the temperature curve on the winding and curve 11 the temperature curve in the outer zones, i.e. near the mold (ambient temperature: 60 to 70 ° C).
  • the EP / IC resin was used A. Pretreatment of Transformetten and the treatment and the casting of the EP / IC resin up as in Example 1. Entspre - accordingly the hitherto practice established practice, the cast Transformetten but were gelled in a convection oven, removed from the mold and cured . The temperature in the forced air oven was set to 130 ° C .; the post-curing of the transformets removed from the mold after 3 hours was carried out for 5 hours at 150 ° C. and then for 8 hours at 180 ° C.
  • curve 20 shows the temperature profile in the EP / IC resin during crosslinking in the immediate vicinity of the casting mold (curve 20) and in the immediate vicinity of the winding (curve 21) and for the furnace temperature (curve 22).
  • curve 20 is significantly higher than curve 21 (winding temperature).
  • the mold temperature then 'overflows the furnace temperature (curve 22) and reaches a height of approximately 140 ° C; due to the heat radiation, the furnace temperature also increases, to approx. 135 ° C.
  • the overflows Winding temperature (curve 21) successively the mold and the furnace temperature and increases to approx. 140 ° C.
  • EP / IC resin B or C was used.
  • the pretreatment of the transformets and the preparation of the EP / IC resins were carried out analogously to Example 1. Because of the increased viscosity of the EP / IC resins, due to the use of silica material as filler , the temperature in the mixing unit was reduced from 80 ° C to only 60 to 65 ° C before adding the reaction accelerator; this was also possible due to the excellent latent properties of the accelerator 3B I up to 70 ° C (see Fig. 3, in which the viscosity increase is shown as a function of temperature).
  • Example 3 For the control of the heating current in the winding, a program was changed as follows compared to Example 1: winding temperature 110 ° C, setting time 10 min, running time 30 min, and then winding temperature 140 ° C, setting time 10 min, running time 30 min.
  • the test results on the transformets are shown in Table 3.
  • EP / IC resins D and E were used.
  • the transformers were pretreated analogously to Example 1, but the temperature in the casting kettle was reduced from 70 ° C. to 50 ° C. before casting.
  • the EP / IC resin (component a) was prepared analogously to Example 1, but without the addition of the reaction accelerator.
  • the reaction accelerator was dissolved in polyisocyanate in a second small mixing unit at room temperature (component b). This procedure was chosen because the reaction accelerator RB II used here does not have as pronounced latent properties as the accelerator RB I.
  • the potting of the Windings were carried out under reduced pressure, components a and b being combined and metered via a static mixing tube.
  • the crosslinking and post-curing of the EP / IC resins was carried out analogously to Example 1.
  • the test values of the transformets are shown in Table 3.
  • the EP / IC resin F was used.
  • the structure of the transformets (corresponding to Example 1) was changed such that the four coils contained layers of aromatic polyamide as layer insulation, the coils were mechanically reinforced by glass fabric tapes and the distance between the coils and the Mold wall was reduced to 2 mm.
  • the drying and degassing of the transformets was carried out analogously to Example 1.
  • the EP / IC resin was prepared, dried and degassed in the mixing unit for 3 hours with stirring and reduced pressure (0.1 mbar) at 60 ° C., the reaction accelerator after a Hour was added.
  • the casting and crosslinking of the EP / IC resins was carried out analogously to Example 1.
  • winding temperature 100 ° C setting time 10 min, running time 30 min, then winding temperature 130 ° C, setting time 15 min, running time 30 min, and then winding temperature 150 ° C, setting time 15 min, running time 30 min.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Windings For Motors And Generators (AREA)
EP84106959A 1983-06-27 1984-06-18 Procédé d'imprégnation et revêtement de bobinages électriques Expired EP0129819B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106959T ATE24792T1 (de) 1983-06-27 1984-06-18 Verfahren zur impraegnierung und einbettung von elektrischen wicklungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833323154 DE3323154A1 (de) 1983-06-27 1983-06-27 Verfahren zur impraegnierung und einbettung von elektrischen wicklungen
DE3323154 1983-06-27

Publications (2)

Publication Number Publication Date
EP0129819A1 true EP0129819A1 (fr) 1985-01-02
EP0129819B1 EP0129819B1 (fr) 1987-01-07

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US (1) US4576768A (fr)
EP (1) EP0129819B1 (fr)
JP (1) JPS6035942A (fr)
AT (1) ATE24792T1 (fr)
BR (1) BR8403124A (fr)
DE (2) DE3323154A1 (fr)

Cited By (6)

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EP0165435A1 (fr) * 1984-05-21 1985-12-27 Siemens Aktiengesellschaft Procédé de fabrication d'un enroulement basse tension pour transformateurs
EP0295669A1 (fr) * 1987-06-19 1988-12-21 Alcatel SEL Aktiengesellschaft Procédé pour noyer une matière à enrouler électrique dans une masse isolante et moule à fondre utilisé à cet effet
ITTO20090315A1 (it) * 2009-04-22 2010-10-23 Ansaldo Ricerche S P A Procedimento di resinatura di uno statore di una macchina elettrica, in particolare macchina elettrica a flusso assiale
EP2800113A1 (fr) * 2013-04-29 2014-11-05 ABB Technology AG Transformateur sec HV
DE102017206778A1 (de) * 2017-04-21 2018-10-25 Schmidhauser Ag Spulenbauelement, Spulenbauelementeverbund und Verfahren zur Herstellung eines Spulenbauelements
CN110993330A (zh) * 2019-10-31 2020-04-10 广州市一变电气设备有限公司 一种变压器线圈的制造方法及烘炉装置

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US5589129A (en) * 1993-02-19 1996-12-31 Kabushiki Kaisha Toshiba Method of manufacturing a molding using a filler or an additive concentrated on an arbitrary portion or distributed at a gradient concentration
DE4432978C2 (de) * 1994-09-16 2001-02-08 Vem Elektroantriebe Gmbh Vorrichtung und Verfahren zur induktiven Erwärmung getränkter elektrischer Baugruppen
DE19519933A1 (de) * 1995-05-31 1996-12-05 Siemens Ag Verfahren zur Herstellung einer Gradientenspule einer Magnetresonanzanlage
DE19631474C1 (de) * 1996-08-03 1997-11-20 Gottlob Thumm Gmbh Vorrichtung zum Imprägnieren von Wicklungen
DE19644187A1 (de) * 1996-10-24 1998-04-30 Vem Elektroantriebe Gmbh Verfahren und Einrichtung zum Vorwärmen, Imprägnieren und Aushärten von Imprägniermitteln in Wicklungseinzelteilen sowie deren Baugruppen elektrischer Maschinen
DE19718872C1 (de) * 1997-05-03 1998-06-25 Gottlob Thumm Gmbh Maschbau Elektrische Erwärmungsvorrichtung für ein eine Wicklung aufweisendes elektrisches Bauteil
MY123931A (en) * 1997-05-30 2006-06-30 Matsushita Electric Ind Co Ltd Method for making molding parts using heat-curable molding compositions
DE19822434C1 (de) * 1998-05-19 1999-08-12 Gottlob Thumm Gmbh Maschbau Elektrische Aufwärmvorrichtung für ein mit einer Wicklung versehenes Bauteil
DE19822433C2 (de) * 1998-05-19 2003-11-20 Maschb Gottlob Thumm Gmbh Verfahren und Vorrichtung zum Imprägnieren von Wicklungen
DE19844399C1 (de) * 1998-05-19 1999-09-23 Gottlob Thumm Gmbh Maschbau Elektrische Aufwärmvorrichtung für ein ein geschichtetes Blechpaket aufweisendes elektrisches Bauteil
US6483218B1 (en) * 1999-05-20 2002-11-19 Alex Petrinko Brushless electric exciter for dynamoelectric machines
US20040248627A1 (en) * 2001-08-07 2004-12-09 Kuo Chun Fu Method for applying film onto electric part
US6624734B2 (en) * 2001-09-21 2003-09-23 Abb Technology Ag DC voltage/current heating/gelling/curing of resin encapsulated distribution transformer coils
AU2003220550A1 (en) * 2002-03-29 2003-10-20 Huntsman International Llc Process for filament winding
US6909928B2 (en) * 2002-06-28 2005-06-21 Prolec G.E. S De R.L. De C.V. Method for manufacturing coils
DE202005021796U1 (de) 2004-06-16 2010-05-12 Gottlob Thumm Maschinenbau Gmbh Vorrichtung zum Vergießen von eine Wicklung aufweisenden elektrischen Bauteilen
EP1635364A1 (fr) * 2004-09-09 2006-03-15 Abb Research Ltd. Enroulement encapsulé d'un transformateur de type sec
EP1635365B1 (fr) * 2004-09-09 2008-12-03 Abb Research Ltd. Enroulement encapsulé d'un transformateur à sec
EP1881033A1 (fr) * 2006-07-20 2008-01-23 Abb Research Ltd. Formulation de resine époxy sans diluant
JP2017152515A (ja) * 2016-02-24 2017-08-31 株式会社東芝 モールドコイル、変圧器、リアクタンス、及びモールドコイルの製造方法
DE102018202229A1 (de) 2018-02-14 2019-08-14 Robert Bosch Gmbh Einrichtung und Verfahren zum induktiven Aushärten eines duroplastischen Kunststoffbauteils

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Publication number Priority date Publication date Assignee Title
AT239369B (de) * 1963-04-11 1965-04-12 Siemens Ag Verfahren zur Herstellung von Gegenständen, insbesondere von Isolierungen elektrischer Maschinen, Geräte oder Apparate, durch Vergießen oder Imprägnieren mit zur Polymerisations- oder Polyadditionsreaktion fähigen Stoffsystemen
US3494888A (en) * 1966-08-30 1970-02-10 Wilbur R Mcelroy Resin compositions from polyepoxides and isocyanate polymers
CH570728A5 (fr) * 1973-02-23 1975-12-15 Hitachi Ltd
DE2444458A1 (de) * 1973-09-19 1975-04-24 Hitachi Ltd Wicklung fuer elektrische rotierende maschinen und verfahren zur herstellung
DE2655367C2 (de) * 1976-12-03 1978-12-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Heißhärtende Reaktionsharzmischung zur Imprägnierung von Isolierungen elektrischer Geräte und zur Herstellung von Formstoffen mit oder ohne Einlagen
EP0103237A2 (fr) * 1982-09-14 1984-03-21 Transformatoren Union Aktiengesellschaft Procédé de fabrication d'enroulements encapsulés en résine pour transformateurs

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165435A1 (fr) * 1984-05-21 1985-12-27 Siemens Aktiengesellschaft Procédé de fabrication d'un enroulement basse tension pour transformateurs
EP0295669A1 (fr) * 1987-06-19 1988-12-21 Alcatel SEL Aktiengesellschaft Procédé pour noyer une matière à enrouler électrique dans une masse isolante et moule à fondre utilisé à cet effet
ITTO20090315A1 (it) * 2009-04-22 2010-10-23 Ansaldo Ricerche S P A Procedimento di resinatura di uno statore di una macchina elettrica, in particolare macchina elettrica a flusso assiale
WO2010122402A3 (fr) * 2009-04-22 2011-05-05 Ansaldo Energia S.P.A. Procédé pour verser de la résine dans un stator de machine électrique, en particulier une machine à flux axial
EP2800113A1 (fr) * 2013-04-29 2014-11-05 ABB Technology AG Transformateur sec HV
WO2014177269A1 (fr) * 2013-04-29 2014-11-06 Abb Technology Ag Transformateur de mesure à isolement à haute tension (ht)
DE102017206778A1 (de) * 2017-04-21 2018-10-25 Schmidhauser Ag Spulenbauelement, Spulenbauelementeverbund und Verfahren zur Herstellung eines Spulenbauelements
US11791089B2 (en) 2017-04-21 2023-10-17 Schmidhauser Ag Coil component
CN110993330A (zh) * 2019-10-31 2020-04-10 广州市一变电气设备有限公司 一种变压器线圈的制造方法及烘炉装置

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Publication number Publication date
US4576768A (en) 1986-03-18
EP0129819B1 (fr) 1987-01-07
JPS6035942A (ja) 1985-02-23
BR8403124A (pt) 1985-06-04
ATE24792T1 (de) 1987-01-15
DE3461962D1 (en) 1987-02-12
DE3323154A1 (de) 1985-01-03

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