CN101777416B - Rectangular fillet iron core for shell type transformer - Google Patents
Rectangular fillet iron core for shell type transformer Download PDFInfo
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- CN101777416B CN101777416B CN2010101240362A CN201010124036A CN101777416B CN 101777416 B CN101777416 B CN 101777416B CN 2010101240362 A CN2010101240362 A CN 2010101240362A CN 201010124036 A CN201010124036 A CN 201010124036A CN 101777416 B CN101777416 B CN 101777416B
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- iron core
- steel sheet
- silicon steel
- rectangular
- shell type
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Abstract
The invention discloses a rectangular fillet iron core for a shell type transformer, belongs to a transformer component, and aims to provide a transformer iron core with small size, light weight, low material consumption and capability of eliminating a point discharge phenomenon. The rectangular fillet iron core comprises a rectangular frame type iron core formed by laminating a plurality of silicon-steel plates, wherein an inner ring of the iron core (2) and adjacent four edges of a rectangular winding (1) have transition fillet structures; each transition fillet consists of a plurality of silicon-steel plate groups (3) which have gradually decreased widths and are laminated in a stepped form and a shielding silicon-steel plate (4) which is arranged on the surface of a top layer silicon-steel plate group (3) and of which one end is bent into a J-shaped circular arc (5); and a right-angle edge of each silicon-steel plate group (3) is coated by the J-shaped circular arc (5). The rectangular fillet iron core for the shell type transformer enhances the insulating pressure-resistant capacity between the iron core and the rectangular winding and is an ideal iron core for the shell type transformer.
Description
Technical field: the present invention relates to a kind of transformer, relate in particular to a kind of iron core of shell type transformer.
Background technology: well-known, iron core is the important component part of electric power or furnace transformer, is the flux path of electromagnetic induction, and it is 0.23～0.3 millimeter folded the forming of silicon steel sheet sign indicating number by some thickness.Because each silicon steel sheet is measure-alike, after their sign indicating numbers built up the iron core of rectangular box-like structure, each bar seamed edge of this iron core formed 90 degree right angles naturally, and this rectangular edge is difficult to form fillet by the mode of machining; Therefore easily form electric field at the rectangular edge of iron core and concentrate and cause and be easy to generate point discharge between rectangular edge and the rectangle winding, thereby cause dielectric voltage withstand ability drop between rectangle winding and the iron core.At present, the insulation distance of taking usually to increase between rectangle winding and the iron core is eliminated point discharge phenomenon, but this can increase material usage, the increasing manufacturing cost of rectangle winding and iron core undoubtedly.
Summary of the invention: at the above-mentioned defective that exists in the prior art, it is little, in light weight, few with material that the present invention aims to provide a kind of volume, can eliminate the rectangular fillet iron core for shell type transformer of point discharge phenomenon.
To achieve these goals, the present invention by the following technical solutions: it comprises the iron core that is built up rectangular box-like structure by some silicon steel sheet sign indicating numbers; Four contiguous seamed edges of iron core inner ring and rectangle winding are the knuckle structure, each knuckle reduces sign indicating number step by step by many groups width dimensions and builds up step-like silicon steel sheet group, is arranged at the shielding silicon steel sheet that outer silicon steel sheet group surface and an end bend to J font circular arc and constitutes, and this J font circular arc coats the rectangular edge of each silicon steel sheet group.
Between the silicon steel sheet group of the inner surface of J font circular arc and this J font circular arc and innermost layer, be equipped with insulation board.
Compared with the prior art, the present invention is owing to adopted technique scheme, build up at the silicon steel sheet sign indicating number after the iron core of rectangular box-like structure, four contiguous seamed edges of iron core inner ring and rectangle winding can nature formation be similar to circular-arc structure, therefore can not only make Electric Field Distribution more even, eliminated the phenomenon that is easy to generate point discharge between the rectangular edge of traditional transformer rectangle winding and iron core, improved the dielectric voltage withstand ability between rectangle winding and the iron core, but also can reduce the material usage of rectangle winding and iron core, reduce manufacturing cost, also reduced the volume and weight of transformer simultaneously.In addition,, therefore can shield, isolate the electric charge of the little rectangular edge that concentrates on each silicon steel sheet group, further improve the dielectric voltage withstand ability between iron core and the rectangle winding owing to be provided with the shielding silicon steel sheet.
Description of drawings:
Fig. 1 is the perspective view of shell type transformer;
Fig. 2 is the A-A cutaway view of the present invention in Fig. 1;
Fig. 3 is the I place enlarged drawing among Fig. 2;
Fig. 4 is the II place enlarged drawing among Fig. 2;
Fig. 5 is the A-A cutaway view of traditional shell type transformer in Fig. 1.
Among the figure: rectangle winding 1 iron core 2 silicon steel sheet groups 3 shielding silicon steel sheets 4 J font circular arcs 5 insulation boards 6 silicon steel sheets 7
Embodiment: the invention will be further described below in conjunction with accompanying drawing and specific embodiment:
In Fig. 1～4, the iron core 2 of two rectangular box-like structures connects and composes " 8 " font structure by rectangle winding 1, and four seamed edges of each iron core 2 inner ring and rectangle winding 1 vicinity are the knuckle structure.Each knuckle is reduced step by step by width dimensions and sign indicating number builds up step-like many groups silicon steel sheet group 3, the shielding silicon steel sheet 4 that is arranged at outer silicon steel sheet group 3 surfaces constitutes, one end of shielding silicon steel sheet 4 extends in rectangle frame and bends to J font circular arc 5, and this J font circular arc coats the rectangular edge of each silicon steel sheet group 3; Wherein, each silicon steel sheet group 3 is by identical 7 yards folded the forming of silicon steel sheet of polylith width dimensions.Between the rectangular edge of each silicon steel sheet group 3 and shielding silicon steel sheet 4, be short-circuited, be pasted with at the inner surface of J font circular arc 5 and bend to circular-arc insulation board 6, between J font circular arc 5 and silicon steel sheet group 3, be provided with flat insulation board 6 at innermost layer.Described outer silicon steel sheet group 3 is meant that group silicon steel sheet group 3 of width dimensions minimum, and the silicon steel sheet group 3 of described innermost layer is meant that group silicon steel sheet group 3 of width dimensions maximum.
Comparison diagram 2, Fig. 5 are not difficult to find out: four seamed edges of the inner ring of iron core 2 of the present invention and rectangle winding 1 vicinity are knuckle, and each bar seamed edge of the iron core 2 of traditional shell type transformer is 90 degree right angles; Obviously, the distance between knuckle and the rectangle winding 1 is greater than the distance between rectangular edge and the rectangle winding 1.
Claims (2)
1. a rectangular fillet iron core for shell type transformer comprises the iron core that is built up rectangular box-like structure by some silicon steel sheet sign indicating numbers; It is characterized in that: four contiguous seamed edges of iron core (2) inner ring and rectangle winding (1) are the knuckle structure, and each knuckle reduces sign indicating number step by step by many groups width dimensions and builds up step-like silicon steel sheet group (3), is arranged at the shielding silicon steel sheet (4) that outer silicon steel sheet group (3) surface and an end bend to J font circular arc (5) and constitutes; Wherein, each silicon steel sheet group (3) forms by the identical silicon steel sheet of polylith width dimensions (7) sign indicating number is folded, and J font circular arc (5) coats the rectangular edge of each silicon steel sheet group (3).
2. rectangular fillet iron core for shell type transformer according to claim 1 is characterized in that: be equipped with insulation board (6) between the silicon steel sheet group (3) of the inner surface of J font circular arc (5) and this J font circular arc and innermost layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101240362A CN101777416B (en) | 2010-03-15 | 2010-03-15 | Rectangular fillet iron core for shell type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101240362A CN101777416B (en) | 2010-03-15 | 2010-03-15 | Rectangular fillet iron core for shell type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101777416A CN101777416A (en) | 2010-07-14 |
| CN101777416B true CN101777416B (en) | 2011-12-14 |
Family
ID=42513828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101240362A Expired - Fee Related CN101777416B (en) | 2010-03-15 | 2010-03-15 | Rectangular fillet iron core for shell type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101777416B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698056A (en) * | 2017-10-20 | 2019-04-30 | 特变电工沈阳变压器集团有限公司 | A kind of three-phase solid laminated core structure |
| CN111768947B (en) | 2019-04-01 | 2023-03-24 | 台达电子企业管理（上海）有限公司 | Transformer and method for manufacturing the same |
| CN111768959B (en) | 2019-04-01 | 2022-03-08 | 台达电子企业管理（上海）有限公司 | Transformer device |
| CN111768960B (en) | 2019-04-01 | 2022-02-18 | 台达电子企业管理（上海）有限公司 | Potting box and transformer |
| CN113948298A (en) * | 2021-10-26 | 2022-01-18 | 保定保菱变压器有限公司 | Lining shielding structure for shell type transformer core and mounting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464041A (en) * | 1968-03-06 | 1969-08-26 | Allis Chalmers Mfg Co | Electrical transformer having leakage flux shield |
| SE385418B (en) * | 1973-08-23 | 1976-06-28 | Asea Ab | ELECTRIC SCREEN TO PREVENT GLITTER IN METALLIC ELECTRODES |
| JPS5728317A (en) * | 1980-07-28 | 1982-02-16 | Hitachi Ltd | Transformer iron core provided with electrostatic screening plate |
| JPH04155807A (en) * | 1990-10-18 | 1992-05-28 | Mitsubishi Electric Corp | Electromagnetic induction equipment |
| JPH1167557A (en) * | 1997-08-26 | 1999-03-09 | Fuji Electric Co Ltd | Core having shield part in transformer |
| DE102005008302B4 (en) * | 2005-02-16 | 2010-09-02 | Siemens Ag | Transformer core with magnetic shielding |
-
2010
- 2010-03-15 CN CN2010101240362A patent/CN101777416B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| JP平11-67557A 1999.03.09 |
| JP平4-155807A 1992.05.28 |
| JP昭57-28317A 1982.02.16 |
| JP昭60-169113A 1985.09.02 |
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| Publication number | Publication date |
|---|---|
| CN101777416A (en) | 2010-07-14 |
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Granted publication date: 20111214 Termination date: 20150315 |
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| EXPY | Termination of patent right or utility model |