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Manufacturing method for magnetic core of iron-based nanocrystalline high-power switching power supply transformer

A high-power switch and power transformer technology, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., can solve the problems of magnetic core materials not working properly, eddy current loss and eddy current loss increase, and expand the use of the environment. Low loss value and good frequency characteristics

Active Publication Date: 2014-04-02
TONGLING SANJIA TRANSFORMER
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Problems solved by technology

With the development of device miniaturization, the frequency of alternating magnetic field is getting higher and higher, and the eddy current loss is significantly increased, which leads to the failure of the magnetic core material to work normally.

Method used

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Embodiment Construction

[0013] A method for preparing an iron-based nanocrystalline high-power switching power supply transformer magnetic core, comprising the following steps:

[0014] (1) Anneal the iron-based amorphous ribbons prepared by rapid cooling and quenching at 550°C for 60 minutes under a hydrogen protective atmosphere, and then anneal at 420°C for 1 hour in a longitudinal magnetic field of 1200A / m to obtain nanocrystalline ribbons; , the mass percent of each component of the iron-based amorphous ribbon is: Fe 73.2%, Cu 0.8%, Nb 2%, V 1.5%, Si 11.5%, B 11%, its bandwidth is 10 mm, and the thickness of the ribbon is 20 μm;

[0015] (2) After crushing and sieving the nanocrystalline thin strips prepared above, the metal powders are proportioned at a weight percentage of 85% and 15% with a particle size of 200 mesh and 100 mesh respectively; then add an appropriate amount of water for beating , to make a slurry with a concentration of 55%, and then add 4% potassium permanganate, 0.2% a...

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Abstract

The invention discloses a manufacturing method for a magnetic core of an iron-based nanocrystalline high-power switching power supply transformer. The method comprises the following specific steps: performing vacuum isothermal annealing on an iron-based amorphous ribbon to obtain a nanocrystalline ribbon; crushing the obtained nanocrystalline ribbon to obtain nanocrystalline metal powder; performing phosphorization and insulated coating treatment on the nanocrystalline metal powder in sequence, adding zinc stearate and silicon carbide micro powder, and performing compression molding. After phosphorization is performed on the components of ammonium molybdate, phosphoric acid, diammonium hydrogen phosphate and sodium fluoride in the nanocrystalline metal powder, a layer of phosphate film is formed on the surface of the powder, so that the frequency characteristic of the magnetic core can be improved remarkably, and the high-frequency magnetic loss is reduced; after the phosphorization, alloy powder is coated in an insulated way by the substances of polyamide-imide resin and nano-attapulgite, so that the resistivity among powder particles is increased, and the high-frequency eddy current loss of the magnetic core is reduced.

Description

technical field [0001] The invention relates to a method for preparing a magnetic core of an iron-based nanocrystalline high-power switching power supply transformer, belonging to the technical field of magnetic materials. Background technique [0002] Iron-based nanocrystalline soft magnetic materials have high saturation magnetic induction, high magnetic permeability, low coercive force and low high-frequency loss, good hardness, wear resistance and corrosion resistance, good temperature and environmental stability, and its comprehensive The magnetic performance is far superior to that of silicon steel, ferrite, permalloy and amorphous alloy, etc. It is currently recognized as a soft magnetic material with excellent comprehensive performance in the world. With the development of device miniaturization, the frequency of alternating magnetic field is getting higher and higher, and the eddy current loss increases significantly, which leads to the failure of the magnetic core ...

Claims

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Application Information

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IPC IPC(8): H01F41/02B22F3/02
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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