Silicon steel sheet with low iron loss, low noise, high magnetic flux and high laminating speed and preparation method thereof

Abstract

The invention discloses a silicon steel sheet with low iron loss, low noise, high magnetic flux and high laminating speed. The silicon steel sheet comprises a silicon steel sheet body, wherein at least one flat hole is formed in the silicon steel sheet body; a groove is formed in one side of the silicon steel sheet body and is of a square structure; a bump matched with the groove is arranged at the corresponding place on the other side of the groove of the silicon steel sheet body. A silicon steel sheet formula and a preparation method play a synergistic effect, so that vortex generated during work of a transformer is very low, and the heat dissipating capacity is 0.2 times that of the traditional transformer; the loading capacity of the transformer which adopts the iron core is greatly improved and is 1.8 times that of the traditional transformer with the same model, the transformer is stable in running, and after the transformer provided by the invention is compared with the traditional transformer with the same model, according to observation for 12 months, failure time of the transformer provided by the invention is zero, and the failure time of the traditional transformer is seven.

Description

technical field [0001] The invention belongs to the technical field of iron core silicon steel sheets of power transmission and distribution transformers in the electric power industry, and in particular relates to a silicon steel sheet with low iron loss, low noise, high magnetic flux, fast stacking and a preparation method thereof. Background technique [0002] The transformer core is made of several silicon steel sheets crossed and overlapped. The assemblers manually fix several silicon steel sheets together through steel plates and bolts. The stacking speed is slow, time-consuming and labor-intensive, and the efficiency is low. In order to improve assembly efficiency, the inventors provided at least two through holes on the silicon steel sheet, and the through holes played the role of guiding and fixing. For example, the five-stage laminated transformer iron core disclosed in CN201120314442.5 is formed by stacking at least one stacked layer. The stacked layer is composed...

AI Technical Summary

Problems solved by technology

1) When the technical features disclosed in the above two patents are deficient, setting at least two through holes on the silicon steel sheet solves the problem of slow stacking speed to a certain extent, but it has a great impact on the magnetic flux of the iron core, which in turn affects the performance of the transformer. performance

2) The thickness of the silicon steel sheet used in the above two patents is large, and it is a conventionally used silicon steel sheet, which has large iron loss and high noise

Its shortcoming is that although the above-mentioned technical solution solves the problem of reducing the magnetic flux, the insulating layer on the silicon steel sheet is easily scratched off during the assembly process, and the magnetic circuit connection between the silicon steel sheets is easy to generate eddy currents, which can generate several Hundreds of degrees Celsius will cause the transformer to explode during operation, causing immeasurable losses to power companies and people

[0005] The existing silicon steel sheet is taken from silicon-containing steel and produced by hot rolling process. Its main disadvantages are: 1. Firstly, heating will consume a lot of energy and high cost; 2. During the hot rolling process, the billet is first made , and then hammered after heating, the maximum size of each silicon steel sheet hammered is 1.2×2.5m, and the actual use size is 1×2m, so the waste edge accounts for about 1 / 4 to 1 / 3, which is a lot of waste; 3. There is a lot of noise during hammering processing, which pollutes the environment; 4. The thickness of the forged product is uneven, and the product performance is poor; 5. The efficiency of continuous processing is low.

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