GB653908A - Improvements in or relating to electric induction apparatus - Google Patents
Improvements in or relating to electric induction apparatusInfo
- Publication number
- GB653908A GB653908A GB10857/48A GB1085748A GB653908A GB 653908 A GB653908 A GB 653908A GB 10857/48 A GB10857/48 A GB 10857/48A GB 1085748 A GB1085748 A GB 1085748A GB 653908 A GB653908 A GB 653908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sets
- laminations
- leg
- see
- 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
Links
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
653,908. Transformers and inductances. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 20, 1948, No. 10857. Convention date, April 30, 1947. [Class 38 (ii)] [Also in Group XXII] A core for a transformer or other electric induction apparatus is formed from two sets of U-shaped laminations having unequal leg portions, the sets being assembled together so that the ends of the legs abut alternately at different levels. The laminations are sheared in varying lengths from magnetic steel strip, are re arranged to form a trapezoidal stack and then bent, as shown in Fig. 5, by a machine having a base 31, a pair of pivoted side-members 32, 33 and a mandrel 39. After annealing, the sets are rearranged and assembled as shown in Fig. 11, the ends of the legs abutting at 112 and 116. The lengths of the laminations may be graded so that either sharp equal corners 127, Fig. 11, are produced, or corners, see Fig. 14, of increasing radius inwards, or rounded corners, see Fig. 17, or so that a tolerance 137, Fig. 13, is allowed between the yoke portions in order to ensure abutting of the ends of the legs. By first bending one leg only of the U-shape, moving the laminations to separate the leg portions slightly, see Fig. 17, and then bending the other leg, a tolerance is provided on the leg portions to enable the sets to nest more easily.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US653908XA | 1947-04-30 | 1947-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB653908A true GB653908A (en) | 1951-05-30 |
Family
ID=22062393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10857/48A Expired GB653908A (en) | 1947-04-30 | 1948-04-20 | Improvements in or relating to electric induction apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB653908A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1023135B (en) * | 1954-03-01 | 1958-01-23 | Siemens Ag | Three-legged magnetic core for multi-phase electrical devices, especially transformers |
| EP0096809A1 (en) * | 1982-06-14 | 1983-12-28 | Oy Helvar | A magnetic circuit or part of a magnetic circuit and a method for preparation thereof |
| CN105830180A (en) * | 2014-01-27 | 2016-08-03 | 东芝产业机器系统株式会社 | Wound core and method for manufacturing wound core |
| JP2017228722A (en) * | 2016-06-24 | 2017-12-28 | 東芝産業機器システム株式会社 | Iron core and manufacturing method and manufacturing apparatus therefor |
| EP3168846A4 (en) * | 2014-07-11 | 2018-03-14 | Toshiba Industrial Products and Systems Corporation | Wound iron core and method for manufacturing wound iron core |
-
1948
- 1948-04-20 GB GB10857/48A patent/GB653908A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1023135B (en) * | 1954-03-01 | 1958-01-23 | Siemens Ag | Three-legged magnetic core for multi-phase electrical devices, especially transformers |
| EP0096809A1 (en) * | 1982-06-14 | 1983-12-28 | Oy Helvar | A magnetic circuit or part of a magnetic circuit and a method for preparation thereof |
| CN105830180A (en) * | 2014-01-27 | 2016-08-03 | 东芝产业机器系统株式会社 | Wound core and method for manufacturing wound core |
| EP3101667A4 (en) * | 2014-01-27 | 2017-06-28 | Toshiba Industrial Products and Systems Corporation | Wound core and method for manufacturing wound core |
| AU2014379890B2 (en) * | 2014-01-27 | 2018-04-05 | Toshiba Industrial Products And Systems Corporation | Wound core and method for manufacturing wound core |
| EP3168846A4 (en) * | 2014-07-11 | 2018-03-14 | Toshiba Industrial Products and Systems Corporation | Wound iron core and method for manufacturing wound iron core |
| JP2017228722A (en) * | 2016-06-24 | 2017-12-28 | 東芝産業機器システム株式会社 | Iron core and manufacturing method and manufacturing apparatus therefor |
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