A hollow three-dimensional wound iron core and its manufacturing process

Abstract

The invention discloses a hollow type three-dimensional wound core and a manufacturing technology thereof. The hollow type three-dimensional wound core is mainly formed by splicing three identical single-frame iron cores. Vertical frame edges and transverse frame edges of each single-frame iron core are provided with hollow groove structures. The technology comprises the steps that the three-dimensional wound core is divided into the three single-frame iron cores for winding, and then the three-dimensional wound core is formed by splicing the three-dimensional equilateral triangles, wherein each single-frame iron core is formed by sequentially and continuously winding a plurality of trapezoid material straps of different sizes, and the original width of the trapezoid material straps in the middle section is decreased through calculation to form the hollow groove structure of the half quasi-polygon. After the three single-frame iron cores are spliced, a direct-current power source is connected to the single-frame iron cores, direct current is led to closed-loop portions of the iron cores, changes of a magnetic field can be adjusted, and no-load losses and load losses are changed.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a hollow three-dimensional wound core and a manufacturing process thereof. Background technique [0002] Driven by the national energy-saving and emission-reduction policies, energy-saving transformers are being used more and more widely, and are being promoted like a prairie fire. At present, most transformer manufacturers at home and abroad reduce transformer losses by purchasing high-quality grain-oriented cold-rolled silicon steel sheets, increasing the thickness of core laminations, increasing the amount of copper wire, or using high-priced imported materials. However, the shortage of resources is a worldwide problem, and the price increase of raw materials is one of the problems faced by the power equipment industry in recent years. Increasing materials is equivalent to increasing energy consumption. This method of reducing transformer loss is achieved by consuming mor...

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Problems solved by technology

However, the shortage of resources is a worldwide problem, and the price increase of raw materials is one of the problems faced by the power equipment industry in recent years. Increasing materials is equivalent to increasing energy consumption. This method of reducing transformer loss is achieved by consuming more materials or importing high-priced materials. is not desirable

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