Foldable planar three-phase open transformer iron core

Abstract

The invention discloses foldable planar three-phase open transformer iron core. The foldable planar three-phase open transformer iron core comprises two inner-ring single-frame iron cores and an outer-ring single-frame iron core, wherein each of each inner-ring single-frame iron core and the outer-ring single-frame iron core is formed by sequentially stacking an inner-layer material band group, a middle-layer material band group and an outer-layer material band group, the openings of a single-ring material band frame forming the inner-layer material band group are symmetrically formed in the upper end of a single-frame iron core column, the openings of a single-ring material band frame forming the middle-layer material band group are symmetrically formed in the upper end of the single-frame iron core column and a bent slope between the single-frame iron core column and a single-frame iron core upper yoke, and the openings of a single-ring material band frame are symmetrically formed in the upper end of the single-frame iron core column, the bent slope between the single-frame iron core column and the single-frame iron core upper yoke and two ends of the single-frame iron core upper yoke, and the distance between each opening of each single-ring material band frame and a bent angle closet to the opening is not smaller than 5mm. The foldable planar three-phase open transformer iron core is high in mechanical strength, high in sudden short-circuit resistance and high in plug-in mounting efficiency.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a folded plane three-phase open transformer iron core. Background technique [0002] The transformer core is an important part of the transformer, and the types of transformers can be divided into single-phase transformers and three-phase transformers. In recent years, with the promotion of energy-saving products in the country, a foldable planar three-phase open transformer core with significant energy saving effect and detachable has been widely used. The foldable planar three-phase open transformer core has light weight, volume Small, no-load loss, simple manufacturing process, low noise, good energy-saving effect, strong heat dissipation and overload capacity, compact structure, superior mechanical and electrical performance, etc., even so, the folded planar three-phase open transformer core is still There are deficiencies, such as: the position of the opening seam can ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a folded planar three-phase open transformer core to solve the problems of poor mechanical strength, poor resistance to sudden short circuit and low insertion efficiency of the existing planar transformer core.

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