E-shaped and I-shaped structure and F-type silicon steel sheets for transformer

Abstract

The invention discloses E-shaped and I-shaped structure and F-type silicon steel sheets for a transformer. The silicon steel sheets are in an E-shape and an I-shape respectively, and the E-shaped silicon steel sheet and the I-shaped silicon steel sheet form a square structure. The length of a square is A and the height of the square is B. The length of the E-shaped silicon steel sheet is A, the height of the E-shaped silicon steel sheet is G, the width of a middle protruded tongue is G, the height of the middle protruded tongue is F, the edge width of the two sides is D, and the width between each side and the middle protruded tongue is E. The width of the I-shaped silicon steel sheet is N, and the length of the I-shaped silicon steel sheet is A. The structure meets the following conditions that A=B; C=A / 3; D=E=N=C / 2=A / 6; F=B-2N=2 / 3A; G=B-N=5 / 6A. The tongue width C and the window height F of the E-shaped and I-shaped structure and F-type series silicon steel sheets are larger than those of an original E-shaped and I-shaped structure series silicon steel sheets. According to the transformer, under the condition of the same size, the sectional area of an iron core is increased by 20 percent, the window height is increased by 15 percent, and the power capacity of the transformer can be increased by more than 25 percent.

Description

technical field [0001] The invention relates to a silicon steel sheet, especially a simple structure, which can manufacture 2-10VA transformers under the same conditions, and has large power capacity, low power consumption, simple structure, and saves raw materials. Silicon steel sheet. Background technique [0002] my country's low-power electronic transformers below 1.5KVA export about 2.5 billion pieces each year and import about 1.4 billion pieces. The annual output is about 1 billion. The output of transformers with silicon steel sheets as iron cores in my country is about 500 million. This kind of transformer is widely used in electronic and electrical products and instrumentation equipment in various fields such as electric power, transportation, machinery, electronics, electricity, aerospace and national defense technology. [0003] The transformers currently produced in my country generally use silicon steel sheet iron cores of EI-shaped structure series, and the...

AI Technical Summary

Problems solved by technology

However, the shadow part accounts for about 31% of the total area during punching, which cannot be used and becomes a waste of waste. If the average weight of each transformer iron core is 1kg, 500,000 tons of silicon steel sheets are needed every year (1kg*500 million pieces=50 10,000 tons) materials, nearly 150,000 tons of silicon steel sheet materials were wasted, worth more than 1 billion yuan

Therefore, the material utilization rate of the existing EI-shaped structural series of silicon steel sheets is low, wasting a lot of precious resources and wealth of the country

However, at present, there is no update in the national and international EI-shaped silicon steel sheet core standards GB14411 and IEC741, and more reasonable structural standards can be used.

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