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Process for laminating the iron core of distribution transformer

A technology of distribution transformer and new technology, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc. It can solve the problems of low utilization rate of silicon steel sheet materials, low efficiency of iron core rolling, and inconvenient coil winding, etc., to achieve Improve short-circuit impact resistance, small no-load current, and small magnetic flux leakage

Inactive Publication Date: 2003-12-31
SHANDONG DACHI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still disadvantages such as strict requirements on the quality of silicon steel sheets, low utilization rate of silicon steel sheet materials, low efficiency of core rolling, large equipment investment, and inconvenient coil winding.

Method used

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  • Process for laminating the iron core of distribution transformer
  • Process for laminating the iron core of distribution transformer
  • Process for laminating the iron core of distribution transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Referring to the accompanying drawings for the embodiments, the structure of the distribution transformer manufactured by this process is described in detail below: a circular cross-section stacked iron core transformer, which is composed of an iron core placed in an oil tank in the transformer housing, high and low voltage coil windings, and the iron core It consists of intermediate sheet 1, edge sheet 2 and iron yoke 3. 45-degree full oblique joints are adopted between the intermediate sheet 1, the edge sheet 2 and the iron yoke 3, and the single-sheet stacked and double-sheet mixed stacked structures are adopted.

[0010] For the specific dimensions of the stacked iron core with circular cross-section, please refer to the attached figure 2 , the cross-sectional area is 635.447 square millimeters, and the effective lamination coefficient is 0.97.

[0011] The 45-degree fully oblique joint in the present invention means that the silicon steel sheets on both sides of ...

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Abstract

The invention relates to a novel process for laminating the iron core of distribution transformer characterized by that, the iron core comprises middle class sheet, side class sheet and iron grips between which 45 degree all-inclined seams are used for joining, and single sheet lamination and double sheet lamination are combined. The invention possesses the advantage of low open circuit loss and small idle current. Besides, by reducing the diameter of fastening threaded rod and increasing the number of drawing threaded rod, the invention can improve the capability for preventing short-circuit impact.

Description

Technical field [0001] The invention relates to a new process for stacking iron cores of distribution transformers, and belongs to the technical field of power distribution equipment. Background technique [0002] At present, the wound core distribution transformers produced by many transformer manufacturers have the advantages of small core loss and low noise. However, there are still disadvantages such as strict requirements on the quality of silicon steel sheets, low utilization rate of silicon steel sheet materials, low efficiency of core rolling, large equipment investment, and inconvenient coil winding. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a new method for stacking iron cores of distribution transformers. To solve the deficiencies of the above-mentioned wound core technology. [0004] The form of the distribution transformer iron core stacking process described in the present invention is that the iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02
Inventor 楚德留张继兰陈玉国
Owner SHANDONG DACHI ELECTRIC
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