GB660965A - Improvements in and relating to electric transformer cores - Google Patents

Improvements in and relating to electric transformer cores

Info

Publication number
GB660965A
GB660965A GB23522/49A GB2352249A GB660965A GB 660965 A GB660965 A GB 660965A GB 23522/49 A GB23522/49 A GB 23522/49A GB 2352249 A GB2352249 A GB 2352249A GB 660965 A GB660965 A GB 660965A
Authority
GB
United Kingdom
Prior art keywords
core
yoke
leg portions
laminations
legs
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
GB23522/49A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB660965A publication Critical patent/GB660965A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • H01F27/245Magnetic cores made from sheets, e.g. grain-oriented
    • H01F27/2455Magnetic cores made from sheets, e.g. grain-oriented using bent laminations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

660,965. Transformers. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 12, 1949 [Sept. 24, 1948], No. 23522/49. Class 38 (ii). A laminated core for electric transformers having at least one closed magnetic circuit of substantially rectangular configuration including two straight legs interconnected by yoke portions so that a core opening is encircled by the legs and yokes wherein each yoke portion has two branch members, one at one side and the other at the other side of the median plane of the core defined by the axes of the legs and wherein each branch member includes a plurality of laminations whose median lines are curved and lie in planes at right angles to the median plane of the core so that the ends of these laminations join the laminations of the legs whose planes are at right angles to the median plane of the core. Leg portions 2, 3 are built up of straight laminations into a cruciform pattern as shown at 4, the inner layers 6, 9 ... 14 being interconnected by means of yoke caps 7, 11 ... 13 so as to form closed loops while the outer layers 15, 18 ... 20 are connected by means of U-shaped parts 16, 21 ... 23 lying in a plane at right angles to the plane through the leg portions. The joints between the leg portions and the yoke caps and between the leg portions and the U-shaped parts may be of any well-known type. A core construction according to the invention occupies less space than the conventional type of core since the " yoke height " is only half that which obtains in the latter type of core; also there is a saving of material in the leg portions due to the fact that the packets of laminations in the leg portions are progressively shorter towards the outside of the leg. Another embodiment is described in which the internal layer of the leg portions and the interconnecting yoke caps are replaced by the conventional flat stacked lamination construction and in yet another modification the yoke caps are replaced by a further series of U-shaped members. The construction may equally well be applied to cores having a single winding leg and a socalled divided yoke.
GB23522/49A 1948-09-24 1949-09-12 Improvements in and relating to electric transformer cores Expired GB660965A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US660965XA 1948-09-24 1948-09-24

Publications (1)

Publication Number Publication Date
GB660965A true GB660965A (en) 1951-11-14

Family

ID=22067226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23522/49A Expired GB660965A (en) 1948-09-24 1949-09-12 Improvements in and relating to electric transformer cores

Country Status (1)

Country Link
GB (1) GB660965A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908880A (en) * 1955-08-08 1959-10-13 Mc Graw Edison Co Magnetic core
WO1991015862A1 (en) * 1990-04-09 1991-10-17 Mojzesz Zylberszac Soft magnetic core in a closed electromagnetic circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908880A (en) * 1955-08-08 1959-10-13 Mc Graw Edison Co Magnetic core
WO1991015862A1 (en) * 1990-04-09 1991-10-17 Mojzesz Zylberszac Soft magnetic core in a closed electromagnetic circuit

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