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BR8502366A - PROCESS FOR THE PRODUCTION OF LOW VOLTAGE WINDINGS FOR TRANSFORMERS - Google Patents

PROCESS FOR THE PRODUCTION OF LOW VOLTAGE WINDINGS FOR TRANSFORMERS

Info

Publication number
BR8502366A
BR8502366A BR8502366A BR8502366A BR8502366A BR 8502366 A BR8502366 A BR 8502366A BR 8502366 A BR8502366 A BR 8502366A BR 8502366 A BR8502366 A BR 8502366A BR 8502366 A BR8502366 A BR 8502366A
Authority
BR
Brazil
Prior art keywords
temperature
casting
hardened
transformers
resin
Prior art date
Application number
BR8502366A
Other languages
Portuguese (pt)
Inventor
Wolfgang Bendel
Klaus Kretzschmar
Helmut Markert
Wolfgang Rogler
Original Assignee
Transformatoren Union 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 Transformatoren Union Ag filed Critical Transformatoren Union Ag
Publication of BR8502366A publication Critical patent/BR8502366A/en

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

Landscapes

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

Abstract

1. A method of manufacturing low-voltage coils (5) for transformers made of strip material (15) rolled up in a spiral with insulating interlayers (16) ant with a casting (17) made of casting resin on each of the two annular end faces, characterized in that a solvent-free mixture of polyepoxy and polyisocyanate resin, known per se, serves as the casting resin ; that this mixture is hardened within a few minutes of being poured onto each end face by the addition of a reaction accelerator at room temperature, to a self-supporting annular casting (17) which can already be mechanically loaded at room temperature ; that the hardened castings (17) of the same coil (5) are both further hardened simultaneously at 1008C to 1408C, so that they can also by mechanically loaded at elevated temperature ; and that the further hardened castings (17) on the hardening temperature being exceeded in the course of operation by raising of the glass transition temperature (glass transformation temperature), harden further without softening.
BR8502366A 1984-05-21 1985-05-20 PROCESS FOR THE PRODUCTION OF LOW VOLTAGE WINDINGS FOR TRANSFORMERS BR8502366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3418823 1984-05-21

Publications (1)

Publication Number Publication Date
BR8502366A true BR8502366A (en) 1986-01-21

Family

ID=6236421

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8502366A BR8502366A (en) 1984-05-21 1985-05-20 PROCESS FOR THE PRODUCTION OF LOW VOLTAGE WINDINGS FOR TRANSFORMERS

Country Status (4)

Country Link
EP (1) EP0165435B1 (en)
AT (1) ATE31126T1 (en)
BR (1) BR8502366A (en)
DE (1) DE3561089D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103077820A (en) * 2012-12-31 2013-05-01 湖南广信电工科技有限公司 Production process of coiling type pressure-regulating oblique end ring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT239369B (en) * 1963-04-11 1965-04-12 Siemens Ag Process for the production of objects, in particular the insulation of electrical machines, devices or apparatus, by casting or impregnating with material systems capable of polymerization or polyaddition reactions
DE1540133A1 (en) * 1965-12-21 1969-12-11 Licentia Gmbh Use of an insulating material composed of two strips for the production of winding insulation, in particular of high-voltage coils
JPS54157201A (en) * 1978-06-02 1979-12-12 Hitachi Ltd Wire manufacturing method for electric machine
DE3323154A1 (en) * 1983-06-27 1985-01-03 Siemens AG, 1000 Berlin und 8000 München METHOD FOR IMPREGNATING AND EMBEDDING ELECTRICAL WINDINGS

Also Published As

Publication number Publication date
EP0165435A1 (en) 1985-12-27
EP0165435B1 (en) 1987-11-25
ATE31126T1 (en) 1987-12-15
DE3561089D1 (en) 1988-01-07

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Legal Events

Date Code Title Description
MM Lapse due to non-payment of fees (art. 50)