Rectangular amorphous-nanocrystalline magnetic core and preparation method thereof

Abstract

The invention discloses a rectangular amorphous-nanocrystalline magnetic core and a preparation method thereof. The specific preparation process includes the following steps that cobalt is added into an iron-based amorphous-nanocrystalline raw material; a cobalt-based amorphous-nanocrystalline strip is wound into an annular iron core through a winding machine; the annular iron core is put in a rectangular mold; the rectangular mold is put in a vacuum annealing furnace for thermal treatment; the rectangular mold is detached, and a rectangular crystallized magnetic core is obtained; the end face of the rectangular crystallized iron core is spray-coated with stress-free epoxy resin dry glue, the rectangular crystallized iron core is naturally air-dried, and the finished rectangular amorphous-nanocrystalline magnetic core is obtained; the finished rectangular amorphous-nanocrystalline magnetic core obtained in S6 is detected by an MATS-2010S soft magnetic material dynamic tester, and packing and binding are carried out after it is detected that the standard is met. The magnetic permeability of an iron-based amorphous-nanocrystalline magnetic core is improved, iron losses of the iron-based amorphous-nanocrystalline magnetic core are reduced, additional losses caused by the traditional impregnation curing process are avoided, the finished product percent of pass of the amorphous-nanocrystalline magnetic core is increased, and the production cost of a high-power transformer is reduced.

Description

technical field [0001] The invention relates to the technical field of power supply main transformers, in particular to a rectangular amorphous and nanocrystalline magnetic core and a preparation method thereof. Background technique [0002] In recent years, iron-based amorphous nanocrystalline ribbons have gradually replaced traditional ferrite as the magnetic core of power transformers due to their high saturation magnetic induction, high magnetic permeability, high Curie temperature, and low loss. However, when When the power of the power transformer reaches an ultra-high power range of several hundred kilowatts or more, due to the requirements of current and installation methods, the magnetic core of the power transformer must be made into a rectangular shape, but the magnetic core of this rectangular structure must be molded and heat-treated. And the process of impregnation and solidification, this processing method will lead to a sudden increase in the loss of the iron...

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Problems solved by technology

[0002] In recent years, iron-based amorphous nanocrystalline ribbons have gradually replaced traditional ferrite as the magnetic core of power transformers due to their high saturation magnetic induction, high magnetic permeability, high Curie temperature, and low loss. However, when When the power of the power transformer reaches an ultra-high power range of several hundred kilowatts or more, due to the requirements of current and installation methods, the magnetic core of the power transformer must be made into a rectangular shape, but the magnetic core of this rectangular structure must be molded and heat-treated. And impregnation solidification process, this processing method will lead to a sudden increase in the loss of the iron-based amorphous nanocrystalline core, resulting in a large temperature rise of the transformer made, and even can not be used

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