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Preparation method of transformer iron core

A transformer iron core and iron core technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of limiting the performance and service life of transformers, insufficient control of hysteresis loss, and high manufacturing costs, so as to achieve improvement The effect of service life and performance, simple implementation, and stable mechanical properties

Inactive Publication Date: 2014-12-03
TAICANG WUFENG METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the silicon steel sheet has the function of controlling and reducing the iron loss, there are still deficiencies in controlling the hysteresis loss, and the preparation cost is high, which limits the performance and service life of the transformer to a certain extent. Therefore, the performance of the transformer core is still to be improved

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  • Preparation method of transformer iron core

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Embodiment 1

[0018] The specific preparation process of the transformer iron core mentioned in the present invention is as follows:

[0019] a) Select the iron core powder. The iron core blank is made of gas-atomized iron powder, the main component of which is Fe3O4. The average particle size of the iron powder after being ground by a grinder is about 70-75um;

[0020] b) Prepare the treatment solution, the main components of the treatment solution and their percentage ratio are: 10% magnesium oxide, 3% additives, and the rest is solvent; among them, the main components of magnesium oxide are MgO, SiO2 and Fe2O3, Its percentage content ratio is about: 92%: 6.5%: 1.5%; the solvent is prepared by mixing phosphoric acid, boric acid and acetic acid, the mixing ratio is about: 3:3:2, and the concentration after mixing is about 20%; The auxiliary agent includes surfactant and antirust agent, and the surfactant is sodium perfluorooctanoate; the antirust agent is a composite agent of sodium nitrit...

Embodiment 2

[0026] The specific preparation process of the transformer iron core mentioned in the present invention is as follows:

[0027] a) Choose iron core powder, the iron core blank is made of gas-atomized iron powder, the main component is Fe3O4, and the average particle size of the iron powder is about 75-80um after being ground by a grinder;

[0028] b) Prepare the treatment solution, the main components of the treatment solution and their percentage ratios are: 12% magnesium oxide, 3.5% additives, and the rest is solvent; among them, the main components of magnesium oxide are MgO, SiO2 and Fe2O3, Its percentage content ratio is about: 92%: 6.5%: 1.5%; the solvent is prepared by mixing phosphoric acid, boric acid and acetic acid, the mixing ratio is about: 3:3:2, and the concentration after mixing is about 25%; The auxiliary agent includes surfactant and antirust agent, and the surfactant is sodium perfluorooctane sulfonate; the antirust agent is a composite agent of sodium nitri...

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Abstract

The invention discloses a preparation method for a transformer iron core. The preparation method comprises the following steps: (a) selecting iron core powder; (b) preparing a conditioning fluid; (c) coating process; (d) bonding and compressing; (e) heat treating. According to the invention, the preparation method is reasonable in procedure arrangement, simple and convenient to implement and moderate in cost; the obtained iron core is stable in mechanical property, especially the magnetic hysteresis loss of the iron core is obviously controlled, the service life of a transformer is effectively prolonged, and the usability of the transformer is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a transformer iron core, in particular to a preparation method of a transformer iron core capable of effectively reducing iron loss, and belongs to the technical field of electronic materials. Background technique [0002] The transformer is made according to the principle of electromagnetic induction. There are two windings on the closed iron core, one is the primary winding and the other is the secondary winding. During the working process of the transformer, its power loss occurs not only in the resistance of the coil, but also in the iron core magnetized by the alternating current. People usually refer to the power loss in the iron core as "iron loss", and the causes of iron loss are mainly divided into hysteresis loss and eddy current loss. The hysteresis loss is the energy loss caused by the hysteresis phenomenon in the magnetization process of the iron core material, while the eddy current loss i...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/36C04B35/64
Inventor 潘华锋
Owner TAICANG WUFENG METAL PROD
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