High-permeability three-phase open-type equivalent-magnetic circuit amorphous alloy core

Abstract

The invention provides a high-permeability three-phase open-type equivalent-magnetic circuit amorphous alloy core and relates to the technical field of transformer cores. The high-permeability three-phase open-type equivalent-magnetic circuit amorphous alloy core comprises three single-box open-type amorphous alloy cores with consistent shape and size, wherein each single-box open-type amorphous alloy core is a rectangular box formed by a left core limb, a right core limb, an upper yoke and a lower yoke; the cross section shape of each core limb of each single-box open-type amorphous alloy core is a semicircle; the core limbs of the three single-box open-type amorphous alloy cores are assembled into the three-phase open-type amorphous alloy core with a three-dimensional triangular structure in a manner that the diameters of the cross sections are laminated with one another; and the cross sections of three core limbs of the three-phase open-type amorphous alloy core are round. An opening is formed in each single-box open-type amorphous alloy core. The core limbs are round in cross sections, are closely spliced, and are small in loss and low in noise.

Description

technical field [0001] The invention relates to the technical field of transformer iron cores, in particular to a high-permeability three-phase open-type isomagnetic circuit amorphous alloy iron core. Background technique [0002] Conserving energy and using environmentally friendly and energy-saving products is a basic national policy of our country. Since the early 1980s, with grain-oriented high-quality cold-rolled silicon steel core materials replacing hot-rolled silicon steel sheets, 7-type series low-loss transformers have gradually replaced high-energy and higher-energy transformers. By the end of the 1990s, with the improvement of the performance of cold-rolled silicon steel sheet materials and the application of new processes and technologies, the 7-type series products were also regarded as high-energy consumption products, and were replaced by the 9-type series products. At the same time, as a new generation of energy-saving products, amorphous alloy core transfo...

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Problems solved by technology

[0003] At present, the amorphous alloy strip mainly relies on imports, and the width and size of the strip are few, which cannot meet the requirements of iron cores with different capacities.

Moreover, due to the characteristics of amorphous alloys, the cross-sectional shape of amorphous alloy iron cores made in my country's industry can only be rectangular, not circular or polygonal.

Since the cross-section of the iron core is rectangular and cannot be circular, the shape of the coil can only be rectangular instead of circular, and it cannot be wound with an iron core, so the iron core can only be made into an open type, and the current open type iron core The opening part is a horizontal opening, and there are likely to be gaps at the butt joints, which will cause the joints to be not tight enough, causing the noise of the transformer to be greater than that of a closed-end iron core with the same capacity

[0004] In addition, iron cores with different capacities require different sections, which can only be realized by changing the thickness dimension of the rectangular shape of the iron core section

In the shape of the same cross-sectional area, the circumference of the circle is the smallest, and the circumference of the rectangle is larger. That is to say, the rectangular iron core is equipped with a rectangular coil, which is actually a great waste of copper for manufacturing the coil, and will increase the load loss and loss of the transformer. Transformer temperature rise

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