Folding iron core for dry-type transformer

Abstract

The invention belongs to the technical field of transformers, and particularly relates to a folding iron core with a dry-type transformer. The folding iron core comprises an iron core body, a high-voltage coil and a low-voltage coil; the iron core body adopts a three-phase three-column structure; each group of iron cores comprises a first iron core frame, a second iron core frame and a third ironcore frame; and the first iron core frame and the second iron core frame are the same in shape. The first iron core frame and the second iron core frame are both smaller than the third iron core frame, the first iron core frame, the second iron core frame and the third iron core frame are formed by rolling silicon steel sheets with two sheet widths, the first iron core frame and the second iron core frame are adjacently arranged and are wrapped by the third iron core frame, the edges, adjacent to the first iron core frame and the second iron core frame, of the third iron core frame and the edges, adjacent to the first iron core frame and the second iron core frame, of the second iron core frame form iron core columns respectively, and the high-voltage coil and the low-voltage coil are arranged on the three iron core columns respectively in a sleeving mode.

Description

technical field [0001] The application of the present invention relates to the technical field of transformers, in particular to a folded iron core with a dry-type transformer. Background technique [0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil, the iron core, and the angle. The main functions of the transformer are voltage transformation, current transformation, impedance transformation, isolation and voltage stabilization. Transformers can be divided into dry-type transformers and oil-immersed transformers. Dry-type transformers are widely used in local lighting, high-rise buildings, airports, and wharf CNC machinery and equipment places. Simply put, dry-type transformers refer to transformers whose iron core and windings are not immersed in insulating oil. The iron cores of existing dry-type transformers generally include two types of laminated...

AI Technical Summary

Problems solved by technology

The stacked iron core products have the disadvantages of large excitation current, large no-load loss, large noise, large volume, heavy weight, large material consumables, low utilization rate, long production time, and low efficiency; while the three-dimensional coiled iron core has the disadvantages of processing Disadvantages such as unequal film length, high processing precision, difficult processing, large seams, large volume, relatively complicated processing technology, etc.

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