US3546645A - Divisible laminated magnetic core structures for transformers or choke coils of great power - Google Patents

Divisible laminated magnetic core structures for transformers or choke coils of great power Download PDF

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Publication number
US3546645A
US3546645A US784416A US3546645DA US3546645A US 3546645 A US3546645 A US 3546645A US 784416 A US784416 A US 784416A US 3546645D A US3546645D A US 3546645DA US 3546645 A US3546645 A US 3546645A
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US
United States
Prior art keywords
magnetic core
divisible
portions
laminations
laminated magnetic
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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
US784416A
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English (en)
Inventor
Egbertus A Frowein
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.)
Smit Nijmegen Electrotechnische Fabrieken NV
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Smit Nijmegen Electrotechnische Fabrieken NV
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Publication of US3546645A publication Critical patent/US3546645A/en
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    • 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 a divisible laminated magnetic core structure for a transformer or a choke coil of great power, said core structure consisting of parts which are interconnected by strip-shaped coupling laminations of equal widths and facing each other, while there is left between them at the most a narrow gap, with laminations protruding towards one another and lying in the same layers of the core, said coupling laminations being clamped on the one hand between protruding laminations of one of two interconnected core parts and on the other hand between protruding laminations of the other one of said two core parts.
  • the invention has the object to use the fact that in the divisible magnetic core structure of the construction described hereabove relatively very narrow coupling laminations can be used, so that for the division of the core structure one is not restricted to the relativel large spaces in the yokes left between the windings. It consists in that the planes of division between said core parts extend in the leg portions of the magnetic core structure in places between the windings mounted on said leg portions and the yoke portions of said core structure.
  • This way of dividing the magnetic core structure has the advantages that the places of division are readily accessible and there is no need to leave, during the coupling operation, spaces below the lower yoke portion and above the upper yoke portion to be able to insert the coupling laminations.
  • the core parts are easily manageable and transportable, since they have more favourable shapes and, as to the leg portions with the windings, are considerably shorter, whereas on the spot, where the transformer or the choke coil is to be erected, the windings can be mounted on the leg portions of the core structure, so that the leg portions and the windings may be transported separately, if desired.
  • the assembled magnetic core structure forms mechanically a stronger unit, as the yoke portions can be made in the usual way as one whole.
  • FIG. 1 an elevational view of the upper part of a three phase transformer provided with a divisible magnetic core structure according to the invention.
  • FIG. 2 is a cross sectional view taken on the line IIII in FIG. 1.
  • FIG. 3 on a larger scale a cross sectional view of portions of two core parts to be coupled, in which for the sake of clearness the normally only 0.3 mm. thick laminations are made too thick in the drawing, and
  • FIG. 4 an elevational view of a layer of laminations of the portion shown in FIG. 3 of the core parts interconnected by coupling laminations.
  • FIG. 1 is the yoke portion and 2 are the leg portions of a laminated magnetic core structure of a three phase transformer, said core structure being divisible at 3.
  • This yoke portion 1 and these leg portions 2 are interconnected by coupling laminations 4, 4'.
  • FIG. 2 shows some of these coupling laminations.
  • the leg portions 2 are each provided with a cooling gap 5 and they carry each a winding 6.
  • the coupling laminations 4, 4' are narrow strips having a width of 3-4 cm., so that they are readily inserted in the spaces left between the ends of the winding 6 and the yoke portion 1, since these spaces are normally considerably wider, for instance 8 cm. wide.
  • a transformer or like assembly adapted for the separate transportation of component parts thereof and the erection and assembly of such component parts at an .installation site, comprising in combination,
  • a laminated magnetic core assembly including a pair of substantially parallel elongate leg portions and a pair of substantially parallel yoke portions, each yoke portion extending laterally from a corresponding end of one of said leg portions to terminate at its opposite end in close proximity to a corresponding end of the other leg portion whereby said other leg portion may be fitted between said yoke portions at the installation site, each such opposite end and the corresponding ends of said other leg portion having alternate laminations thereof recessed to provide slots, the slots in said opposite ends of said yoke portions and the slots in the ends of said other leg portion being coplanar and a plurality of coupling laminations filling said slots and bridging between said other leg portion and said yoke portion to close the magnetic path of said core assembly; and,
  • winding supported on said other leg portion, said winding being of an axial length which is less than the length of said other leg portion to expose end portions of said other leg portion which are slightly greater in length than the depths of said slots;

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Particle Accelerators (AREA)
US784416A 1967-12-21 1968-12-17 Divisible laminated magnetic core structures for transformers or choke coils of great power Expired - Lifetime US3546645A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6717462A NL6717462A (ko) 1967-12-21 1967-12-21

Publications (1)

Publication Number Publication Date
US3546645A true US3546645A (en) 1970-12-08

Family

ID=19802055

Family Applications (1)

Application Number Title Priority Date Filing Date
US784416A Expired - Lifetime US3546645A (en) 1967-12-21 1968-12-17 Divisible laminated magnetic core structures for transformers or choke coils of great power

Country Status (9)

Country Link
US (1) US3546645A (ko)
AT (1) AT283493B (ko)
BE (1) BE725777A (ko)
CH (1) CH489879A (ko)
DE (1) DE1815560B2 (ko)
FR (1) FR1600749A (ko)
GB (1) GB1250796A (ko)
NL (1) NL6717462A (ko)
SE (1) SE349184B (ko)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216076A1 (de) * 1981-05-04 1982-11-18 General Electric Co., Schenectady, N.Y. Transformatorkern und verfahren zum aufbringen von transformatorwicklungen auf einen transformatorkern
US4520556A (en) * 1981-05-04 1985-06-04 General Electric Company Methods for assembling a transformer core
US20120001712A1 (en) * 2010-06-30 2012-01-05 Silviu Puchianu Transformers
US20210217551A1 (en) * 2018-05-11 2021-07-15 Abb Power Grids Switzerland Ag Magnetic core for an electromagnetic induction device, an electromagnetic induction device comprising the same, and a method of manufacturing a magnetic core
US20210391111A1 (en) * 2018-11-01 2021-12-16 Toshiba Industrial Products and Systems Corp. Stacked core for stationary induction apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727457C2 (de) * 1987-08-18 1997-02-13 Waasner Elektrotechnische Fabr Drehstromtransformator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523072A (en) * 1947-01-18 1950-09-19 Gen Electric Magnetic core
US2702936A (en) * 1952-04-07 1955-03-01 Gen Electric Method of making magnetic cores
US3344383A (en) * 1965-12-30 1967-09-26 Sylvania Electric Prod Core portions having fused bond joint outside of embrace of coils thereon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523072A (en) * 1947-01-18 1950-09-19 Gen Electric Magnetic core
US2702936A (en) * 1952-04-07 1955-03-01 Gen Electric Method of making magnetic cores
US3344383A (en) * 1965-12-30 1967-09-26 Sylvania Electric Prod Core portions having fused bond joint outside of embrace of coils thereon

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216076A1 (de) * 1981-05-04 1982-11-18 General Electric Co., Schenectady, N.Y. Transformatorkern und verfahren zum aufbringen von transformatorwicklungen auf einen transformatorkern
US4520556A (en) * 1981-05-04 1985-06-04 General Electric Company Methods for assembling a transformer core
US20120001712A1 (en) * 2010-06-30 2012-01-05 Silviu Puchianu Transformers
US20210217551A1 (en) * 2018-05-11 2021-07-15 Abb Power Grids Switzerland Ag Magnetic core for an electromagnetic induction device, an electromagnetic induction device comprising the same, and a method of manufacturing a magnetic core
US20210391111A1 (en) * 2018-11-01 2021-12-16 Toshiba Industrial Products and Systems Corp. Stacked core for stationary induction apparatus
US12033782B2 (en) * 2018-11-01 2024-07-09 Toshiba Industrial Products and Systems Corp. Stacked core for stationary induction apparatus

Also Published As

Publication number Publication date
DE1815560B2 (de) 1972-05-10
NL6717462A (ko) 1969-06-24
CH489879A (de) 1970-04-30
SE349184B (ko) 1972-09-18
GB1250796A (ko) 1971-10-20
BE725777A (ko) 1969-05-29
FR1600749A (ko) 1970-07-27
DE1815560A1 (de) 1969-07-17
AT283493B (de) 1970-08-10

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