EP0077487B1 - Noyau de fer pour transformateurs - Google Patents

Noyau de fer pour transformateurs Download PDF

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Publication number
EP0077487B1
EP0077487B1 EP82109161A EP82109161A EP0077487B1 EP 0077487 B1 EP0077487 B1 EP 0077487B1 EP 82109161 A EP82109161 A EP 82109161A EP 82109161 A EP82109161 A EP 82109161A EP 0077487 B1 EP0077487 B1 EP 0077487B1
Authority
EP
European Patent Office
Prior art keywords
core
sheet stacks
sheets
yokes
sheet
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
Application number
EP82109161A
Other languages
German (de)
English (en)
Other versions
EP0077487A1 (fr
Inventor
Rudolf Dr. Dipl.-Ing. Zahorka
Richard Dr. Dipl.-Ing. Pfeiffer
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.)
Transformatoren Union AG
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
Priority to AT82109161T priority Critical patent/ATE19322T1/de
Publication of EP0077487A1 publication Critical patent/EP0077487A1/fr
Application granted granted Critical
Publication of EP0077487B1 publication Critical patent/EP0077487B1/fr
Expired 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented

Definitions

  • the invention relates to iron cores for transformers made of very thin sheet metal lamellae made of amorphous material, with very low magnetic loss losses, core legs and yokes each being composed of a plurality of sheet metal packs lying one against the other and the sheet metal packs interlocking at the nodes between the core legs and the yokes in the manner of a brick masonry.
  • the iron cores for transformers are usually constructed from cold-rolled, grain-oriented core sheets.
  • the core plates are mortised so that the joints are offset in layers.
  • the magnetic directional sensitivity of the cold-rolled core sheets necessitates careful individual sheet nesting in order to keep the magnetic losses, especially at the core corners and nodes, small.
  • the sheets are often also stacked on top of one another in pairs, with a relatively small increase in the magnetic reversal losses.
  • the stress points are designed with 90 ° spigot or with 45 ° spigot.
  • the invention has for its object to provide a core structure for the use of core sheets with very low sheet thickness and with extremely low magnetic reversal losses, which allows technically satisfactory and economical production even very large transformer cores.
  • the laminated cores each forming a core leg, stacked in the correct position serve as a winding core for an associated winding, and that this winding holds the laminated cores together as a bandage.
  • the laminated cores of the two yokes are only inserted into the corresponding cutouts in the cored limbs after all the windings have been applied to the cores, and the laminated cores are held together in the nodes by gluing or other mechanical devices.
  • the core structure according to the invention from column-shaped laminated cores allows, in a very advantageous manner, prefabrication of these very robust and relatively insensitive assemblies also from very thin sheet metal, which is relatively sensitive in itself, so that large transformer cores, for example from amorphous metal sheets developed recently, can be economically constructed Material with very low magnetic loss is made possible.
  • Sheet packs 1 are assembled in a manner not shown from a plurality of very thin sheet metal lamellae of the same size and have the shape of cuboids.
  • the laminations are made of amorphous, ferromagnetic material and are considerably thinner than laminations made of grain-oriented transformer sheet.
  • All laminated core 1 of core legs 3 and Yokes 2 of the same iron core preferably have the same cross section, in the illustrated embodiment an elongated rectangle.
  • the core legs 3 and the yokes 2 are composed of laminated cores 1 of different lengths and / or offset in the longitudinal direction. Accordingly, a laminated core 1 alternately forms a pin at the nodes of the iron core and the next laminated core 1 with its end face forms the base of a groove.
  • the core legs 3 are mortised at the junctions with the yokes 2, all butt joints between adjacent laminated cores 1 being either parallel or at right angles to the core leg axes. To compensate for manufacturing tolerances, a small air gap is provided between the end faces of a sheet metal compact 1, each of which represents the base of a groove, and the peg engaging in this groove.
  • the laminations in the individual laminated cores 1 are glued to one another or are held together by bolts made of preferably non-magnetic material and thereby form building blocks for the iron cores of transformers which can be produced efficiently in a prefabrication.
  • the mechanical cohesion of the laminated cores 1 in the core legs 3 and the yokes 2 takes place in a conventional manner in a press frame, inter alia with the aid of press iron and bandages.
  • the pressing force for holding the laminated cores 1 together in the individual core legs 3 can advantageously be taken over by transformer windings applied directly to the core legs.
  • both the laminated cores 1 of the lower and of the upper yoke are then mortised with the ends of the core legs 3 after the windings have been applied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Soft Magnetic Materials (AREA)
  • Fish Paste Products (AREA)

Claims (4)

1. Noyau de fer pour transformateurs, formé de lamelles de tôle très minces en matériau amorphe, présentant de très faibles pertes par inversion magnétique, dont les branches (3) et les culasses (2) sont composées chacune de plusieurs empilages ou paquets de tôles (1) appliqués l'un contre l'autre, et dans lequel, aux points où se joignent les branches (3) et les culasses (2), les paquets de tôles (1) s'enchevêtrent à la façon des briques d'une maçonnerie, caractérisé en ce
qu'un grand nombre de lamelles de tôle sont assemblés fermement en paquets de tôles (1) en forme de colonnes, autoportantes et de forme stable,
que les lamelles de tôle d'un paquet (1) sont collées ensemble, et
que tous les paquets de tôles (1) possèdent la même section droite rectangulaire et représentent des parallélépipèdes qui ne diffèrent que par leur longueur, de sorte que tous les joints (4) entre les paquets de tôles (1), aux points de jonction, sont orientés, soit perpendiculairement, soit parallèlement aux axes des branches du noyau.
2. Noyau selon la revendication 1, caractérisé en ce que les paquets de tôles (1) formant une branche de noyau (3), superposés en position convenable, servent de noyau de bobinage pour un enroulement correspondant et que cet enroulement maintient les paquets de tôles ensemble à la façon d'un bandage.
3. Noyau selon les revendications 1 et 2, caractérisé en ce que les paquets de tôles (1) des deux culasses (2) sont seulement mis en place dans les évidements correspondants des branches de noyau (3) après la disposition de tous les enroulements sur les branches.
4. Noyau selon la revendication 1, caractérisé en ce que les paquets de tôles (1) sont reliés entre eux par collage aux points de jonction.
EP82109161A 1981-10-16 1982-10-04 Noyau de fer pour transformateurs Expired EP0077487B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109161T ATE19322T1 (de) 1981-10-16 1982-10-04 Eisenkern fuer transformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813141206 DE3141206A1 (de) 1981-10-16 1981-10-16 Eisenkern fuer transformatoren
DE3141206 1981-10-16

Publications (2)

Publication Number Publication Date
EP0077487A1 EP0077487A1 (fr) 1983-04-27
EP0077487B1 true EP0077487B1 (fr) 1986-04-16

Family

ID=6144288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109161A Expired EP0077487B1 (fr) 1981-10-16 1982-10-04 Noyau de fer pour transformateurs

Country Status (3)

Country Link
EP (1) EP0077487B1 (fr)
AT (1) ATE19322T1 (fr)
DE (2) DE3141206A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4030448A1 (fr) * 2021-01-15 2022-07-20 Hitachi Energy Switzerland AG Agencement de noyau, transformateur, procédé de production d'un agencement de noyau et procédé de production d'un transformateur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4314337C1 (de) * 1993-04-30 1994-07-28 Siemens Ag Verfahren und Anordnung zum Einschichten von Transformatorkernblechen
CN102969138B (zh) 2012-12-11 2014-10-15 吉林省电力有限公司电力科学研究院 0.2Ss级特种高压计量电流互感器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1365569A (en) * 1921-01-11 Electromagnetic apparatus
DE509621C (de) * 1930-10-10 Aeg Eisenkern fuer elektrische Transformatoren, der aus Paketen von Einzelblechen besteht und dessen Jochpakete in die Schenkelpakete eingeschichtet sind
FR514079A (fr) * 1920-04-19 1921-03-02 Joseph Armand Marie Vincent De Mode de construction des carcasses de transformateurs électriques et appareils analogues
DE2151960B2 (de) * 1971-10-19 1976-03-11 Lepper-Dominit Transformatoren Gmbh, 5340 Bad Honnef Transformatorkern
DE2640612C3 (de) * 1976-09-09 1982-01-21 Siemens AG, 1000 Berlin und 8000 München Tauchankermagnetsystem und Verfahren zu dessen Herstellung
US4201837A (en) * 1978-11-16 1980-05-06 General Electric Company Bonded amorphous metal electromagnetic components

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4030448A1 (fr) * 2021-01-15 2022-07-20 Hitachi Energy Switzerland AG Agencement de noyau, transformateur, procédé de production d'un agencement de noyau et procédé de production d'un transformateur

Also Published As

Publication number Publication date
EP0077487A1 (fr) 1983-04-27
ATE19322T1 (de) 1986-05-15
DE3270655D1 (en) 1986-05-22
DE3141206A1 (de) 1983-04-28

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