Open type transformer three-dimensional roll-core

Abstract

The invention provides an open type transformer three-dimensional roll-core. The three-dimensional roll-core is characterized in that the roll-core is composed of three identical iron core frames made of silicon steel sheets, and each iron core frame is formed by a hexagonal frame defined by an upper half frame and a lower half frame; the upper half frame is provided with a left and a right upper half frame bevel edge; the lower half frame is provided with a left and a right lower half frame bevel edge; the silicon steel sheets of two bevel edges at the same sides of the upper half frame and the lower half frame are arranged in a staggered manner; the silicon steel sheets of two bevel edges at the same sides are mutually inserted together to form the bevel edges of the iron core frames; the silicon steel sheets of each layer are connected at bending positions of the silicon steel sheets. The open type transformer three-dimensional roll-core has the positive effects that an iron core joint position of the roll-core is completely out of a coil, joint position fastening treatment can be very conveniently carried out after the iron core joint position is sheathed in the coil, and the roll-core is very conducive to transformer noise reduction and loss reduction. If a fault happens, the upper half frame of the iron core frame can be conveniently dismantled and the coil can be pulled out for maintenance.

Description

technical field [0001] The invention relates to a three-dimensional wound iron core of a transformer, which is used for a three-phase wound iron core oil-immersed transformer or a dry-type transformer. Background technique [0002] The traditional three-dimensional wound core is composed of three identical rectangular core frames wound with continuous silicon steel sheets. The disadvantage is that the coil must be wound on the finished iron core column, and a special winding machine must be used, which leads to increased investment in production equipment, and due to equipment limitations, it is also impossible to produce a transformer with a larger capacity. Because the core is completely enclosed, the coil cannot be removed, and once the coil fails, repairs will be very difficult. [0003] At present, open wound cores are also used in the production of three-dimensional wound core transformers, but the opening positions are all on the core column of the transformer, so it...

AI Technical Summary

Problems solved by technology

The disadvantage is that the coil must be wound on the finished core column, and a special winding machine must be used, resulting in increased investment in production equipment, and due to equipment limitations, it is also impossible to produce transformers with larger capacity

Since the core is completely enclosed, the coil cannot be removed, and once the coil fails, repairs will be very difficult

[0003] At present, open wound cores are also used in the production of three-dimensional wound core transformers, but the opening positions are all on the core column of the transformer, so once the coil is inserted, it is difficult to deal with the seam position

Moreover, the seam method leads to an increase in reluctance, which increases the loss of the transformer

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