GB1104772A - Transformer cores and method of making same - Google Patents
Transformer cores and method of making sameInfo
- Publication number
- GB1104772A GB1104772A GB12025/66A GB1202566A GB1104772A GB 1104772 A GB1104772 A GB 1104772A GB 12025/66 A GB12025/66 A GB 12025/66A GB 1202566 A GB1202566 A GB 1202566A GB 1104772 A GB1104772 A GB 1104772A
- Authority
- GB
- United Kingdom
- Prior art keywords
- group
- laminations
- switch
- lengths
- core
- 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
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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
-
- 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
- H01F27/2455—Magnetic cores made from sheets, e.g. grain-oriented using bent laminations
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
- H01F41/024—Manufacturing of magnetic circuits made from deformed sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
- Y10T29/49078—Laminated
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
1,104,772. Making transformer cores, bending, shearing. TELCON-MAGNETIC CORES Ltd. 18 March, 1966 [30 March, 1965], No. 12025/66. Headings B3A, B3E and B3W. [Also in Division H1] A method of making transformer cores comprises cutting lengths of magnetic material from a strip thereof, the lengths all differing from each other, selecting a group of the longest of the lengths and assembling them into a closed ring with abutting ends, similarly arranging a group of the longest remaining lengths and assembling them within the first group and repeating these operations until all the cut lengths have been so assembled. A strip of grain oriented magnetic material 1 is advanced by a roller 3 through a shear device 8 until the end 9 of the strip contacts a switch 10 on an adjustable stop 11. Closure of the switch 11 cuts out the drive motor 4, actuates the shear device 8 and after a suitable time lag starts a motor 14 to rotate an indexing screw 15. The motor 14 also rotates a cam disc 18 via a variable speed gear 16. As the cut length of strip falls from the shear device, the switch 10 is opened, but the motor 14 remains energized via a switch 20, which is closed by a cam follower 21 acting on the disc 18 so that when the follower falls into a notch 22 the switch 20 is opened. The apparatus produces groups of laminations wherein the increment of length increase of each is equal or, if required, one or more laminations in a group may have a greater increment of length increase. A counter 24 is set so that after a pre-determined number of laminations have been cut, a magnetic device 25 retracts the stop 11 additionally to the movement caused by the screw 15. The apparatus may be arranged to cut the longest lamination first. A group of laminations is arranged with their ends in different transverse planes and a core group is formed between walls (45), (Fig. 5, not shown). The ends of the outermost lamination overlap, and they may be welded or taped together. Other core groups may be formed and placed in succession inside the first group and the air gaps between the butt jointed laminations may be arranged in zig-zag formation (Fig. 2, not shown). The core, with a mandrel 47 inside, is placed between forming plates 48, 49, 51 and an hydraulically operated piston forms the core to its final shape prior to heat treatment. Finally, if the outer laminations have been welded, the weld is broken, or if they were taped, the tape is burned up in the furnace during heat treatment.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US443929A US3328737A (en) | 1965-03-30 | 1965-03-30 | Transformer cores and method of making same |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1104772A true GB1104772A (en) | 1968-02-28 |
Family
ID=23762758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12025/66A Expired GB1104772A (en) | 1965-03-30 | 1966-03-18 | Transformer cores and method of making same |
Country Status (3)
Country | Link |
---|---|
US (1) | US3328737A (en) |
DE (1) | DE1514952A1 (en) |
GB (1) | GB1104772A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3469221A (en) * | 1967-05-19 | 1969-09-23 | Olsen Magnetic Inc | Transformer core |
US3538474A (en) * | 1968-12-11 | 1970-11-03 | Olsen Magnetic Inc | Transformer core |
US4972168A (en) * | 1989-01-03 | 1990-11-20 | Abb Power T & D Company, Inc. | Transformers and cores for transformers |
CA2042253C (en) * | 1990-06-11 | 2000-08-15 | Willi Klappert | Method of making a transformer core comprising strips of amorphous steel wrapped around the core window |
US5230139A (en) * | 1990-06-11 | 1993-07-27 | General Electric Company | Method of making a transformer core comprising strips of amorphous steel wrapped around the core window |
US5315754A (en) * | 1990-06-11 | 1994-05-31 | General Electric Company | Method of making a transformer core comprising strips of amorphous steel wrapped around the core window |
DE102009048659B3 (en) * | 2009-09-29 | 2011-04-28 | Siemens Aktiengesellschaft | transformer core |
CN102951489B (en) * | 2012-11-14 | 2015-09-30 | 海宁联丰东进电子有限公司 | A kind of magnetic core of transformer S. A. rubberizing equipment |
CN102951488A (en) * | 2012-11-14 | 2013-03-06 | 江西欧美亚电子有限公司 | Adhesive tape adhering tool for magnetic core of transformer |
CN114655682B (en) * | 2021-11-30 | 2023-09-05 | 国网江苏省电力有限公司盐城供电分公司 | Transformer magnetic core material loading and assembly structure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2931993A (en) * | 1956-04-18 | 1960-04-05 | Mc Graw Edison Co | Magnetic core |
US3223955A (en) * | 1961-11-13 | 1965-12-14 | Porter Co Inc H K | Transformer core construction and method of producing same |
US3186067A (en) * | 1963-08-02 | 1965-06-01 | Gen Electric | Method of making single turn core for transformer or the like |
-
1965
- 1965-03-30 US US443929A patent/US3328737A/en not_active Expired - Lifetime
-
1966
- 1966-03-18 GB GB12025/66A patent/GB1104772A/en not_active Expired
- 1966-03-29 DE DE19661514952 patent/DE1514952A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1514952A1 (en) | 1969-09-04 |
US3328737A (en) | 1967-06-27 |
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