3-D triangle open mouth coiling iron core

Abstract

A three-dimensional triangular opening curling iron core with high performances and easy for production and maintenance is disclosed. The iron core uses three single phase opening curling iron cores (4), (5), (6) with the same shape to combine, at the central angle of 120 degrees, into the three-dimensional triangular opening curling iron whose section is elliptical or polygonal (an external ellipse). An core post section of each single phase opening curling iron core is semi-elliptical or polygonal (an external semi-ellipse), and a yoke section is the semi-ellipse which is as (2/3-1) time as the post section. Due to the opening of the iron core, windings can be singly manufactured, and when producing and maintaining, the iron core can be opened at the opening gaps for installation or replacement of the windings, the windings are sleeved within three core posts (1), (2), (3).

Description

Technical field [0001] The invention relates to a three-phase power transformer iron core, the cross-sections of three core columns are all elliptical, and the appearance shape is a cylinder whose cross-section is an equilateral triangle. Background technique [0002] The cores of domestic three-phase power transformers are roughly divided into two categories: laminated cores and wound cores: laminated cores, which are made of various specifications of single-piece silicon steel strips; Wound core, also known as rolled core, is made of a silicon steel strip with different widths. Laminated transformers have many oblique joints at the junction of each layer when the iron core is stacked, so the magnetic flux density at the junction changes too much, which will lead to a series of technical problems, resulting in a decline in technical performance indicators and More silicon steel sheets are used. There are two structural forms of coiled iron core: one is the planar horizont...

AI Technical Summary

Problems solved by technology

The ideal structure of the three-dimensional triangular iron core is that the cross-sectional area of ​​the iron yoke of each single-phase iron core should be greater than the cross-sectional area of ​​the core column of each single-phase iron core ( ) times (about 16%), it is difficult to meet the installation requirements of this process at present

In addition, there are many problems in the seamless coil core, such as special manufacturing equipment, limited production capacity, complex and cumbersome process, inconvenient maintenance, and inability to produce large-capacity power transformers, etc.

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