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Iron winding core for shell transformer and method

A technology for shell-type transformers and coiled iron cores, which is applied in the fields of coiled iron cores for transformers, coiled iron cores for shell-type transformers and their production, and can solve the problems of low lamination productivity, complicated wedging process, poor maintainability, etc., and achieve Strong short-circuit resistance, labor saving, and strong overload capacity

Inactive Publication Date: 2010-09-01
威海华通开关设备有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of poor maintainability, large iron core noise, low lamination productivity and complicated wedging process existing in stacked core transformers, the invention provides a coiled iron core for shell type transformers and a manufacturing method

Method used

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  • Iron winding core for shell transformer and method
  • Iron winding core for shell transformer and method
  • Iron winding core for shell transformer and method

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Embodiment Construction

[0029] Such as image 3 , Figure 4 , Figure 5 As shown, the present invention consists of two rectangular wound iron cores 1 , binding straps 2 and interleaved windings 5 ​​. A cutout 3 is arranged respectively above the binding band 2 on the two rectangular coiled iron cores 1, and the two cutouts are symmetrically distributed.

[0030] Concrete preparation method of the present invention, its steps are as follows:

[0031] 1. Use specific mechanical equipment to roll the silicon steel strip into such figure 1 The rectangular coiled iron core 1 shown is subjected to annealing treatment;

[0032] 2. If figure 2 As shown, the two rolled rectangular coiled iron cores 1 are bound together with a special binding band 2, and the binding part is cured with epoxy resin (other parts are not cured);

[0033] 3. If image 3 As shown, put the cured coiled iron core 1 on the specially customized tooling 4 by using lifting equipment; use a laser knife to make two incisions 3 at s...

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Abstract

The invention discloses an iron winding core for a shell transformer and a manufacturing method. The iron core has rectangular iron winding cores, and the number of the iron winding cores is two; the two iron winding cores are bond together by using a binding belt and cured by using epoxy resin, and staggered windings are sleeved on the periphery of the binding belt; and a notch is formed above the binding belt on the two rectangular iron winding cores respectively, and the two notches are distributed symmetrically. The iron winding core for the shell transformer has the advantages of good maintainability, low reluctance, great reduction of no-load loss and extremely low noise; the iron winding core is mechanically wound so as to save the labor force and improve the production efficiency; the iron winding core is integral, so the iron winding core is easy to fix and wedge; and the iron winding core has high space factor and saves materials.

Description

technical field [0001] The invention relates to a coiled iron core for a transformer, in particular to a coiled iron core for a shell-type transformer used in an electric furnace and a manufacturing method thereof, belonging to the technical field of electric equipment. Background technique [0002] At present, the electric furnace transformers on the market adopt a laminated iron core structure, which has the following defects during use: [0003] 1. The repairability is poor. When in use, once the coil of a certain phase fails to repair the coil, the entire transformer has to be dismantled and reassembled, which is equivalent to reinstalling a transformer. The workload of dismantling and reassembling is very large. [0004] 2. Because of the stacked iron core structure, there are 12 seams in each layer, and there are several seams in the whole iron core. The direction of high magnetic permeability is inconsistent, resulting in large transformer no-load current, large no-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F27/26H01F41/02
Inventor 李支柱王锋吴正文
Owner 威海华通开关设备有限公司
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