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A magnetic material for an iron core of a generator and a preparation method thereof

A technology of magnetic materials and generators, applied in the fields of magnetic materials, magnetic circuits characterized by magnetic materials, inductance/transformer/magnet manufacturing, etc., can solve the problems of high iron loss, internal oxidation, etc. The effect of reducing power loss and eddy current loss

Active Publication Date: 2019-01-11
浙江宝捷机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron core magnetic sheets made of existing magnetic materials are not only prone to internal oxidation problems, but also have high iron loss values, which are difficult to meet the requirements of the continuous development of electromechanical products in the direction of miniaturization, high magnetic induction, and low iron loss.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] The preparation method of the magnetic material comprises the steps of:

[0051] Step S1, washing the Fe-Co alloy powder with absolute ethanol three times to remove surface oxides, and drying the Fe-Co alloy powder in a vacuum oven at 86° C. for 6-7 hours after cleaning;

[0052] Step S2, mixing the above-mentioned Fe-Co alloy powder and organic additives uniformly by means of mechanical fusion, and discharging to obtain mixed alloy powder;

[0053] Step S3, mix the mixed alloy powder and polyvinylpyrrolidone (PVP) powder, add deionized water, ultrasonic 55-60min until the PVP powder is completely dissolved, continue to mechanically stir the blend at a speed of 300r / min for 24h, and then centrifuge solids are separated;

[0054] Among them, the amount of deionized water added is 5-6 times the mass of the mixed alloy powder;

[0055] Step S4, then put the solid into absolute ethanol, sequentially add quantitative deionized water, ammonia water with a mass fraction of 1...

Embodiment 1

[0061] A magnetic material for a generator iron core, prepared from the following main raw materials in parts by weight: 84 parts of Fe-Co alloy powder, 0.001 part of organic additives, 40 parts of polyvinylpyrrolidone powder, 115 parts of ethyl orthosilicate share;

[0062] The magnetic material used for generator iron core is prepared by the following steps:

[0063] Step S1, washing the Fe-Co alloy powder with absolute ethanol three times to remove surface oxides, and drying the Fe-Co alloy powder in a vacuum drying oven at 86°C for 6 hours after cleaning;

[0064] Step S2, mixing the above-mentioned Fe-Co alloy powder and organic additives uniformly by means of mechanical fusion, and discharging to obtain mixed alloy powder;

[0065] Step S3, mixing the mixed alloy powder and polyvinylpyrrolidone powder, adding deionized water, ultrasonicating for 55 minutes until the PVP powder is completely dissolved, continuing to mechanically stir the blend at a speed of 300 r / min for...

Embodiment 2

[0072] A magnetic material for generator iron cores, prepared from the following main raw materials in parts by weight: 84.5 parts of Fe-Co alloy powder, 0.005 parts of organic additives, 40.5 parts of polyvinylpyrrolidone powder, and 120 parts of tetraethyl orthosilicate share;

[0073] The magnetic material used for generator iron core is prepared by the following steps:

[0074] Step S1, washing the Fe-Co alloy powder with absolute ethanol three times to remove surface oxides, and drying the Fe-Co alloy powder in a vacuum drying oven at 86°C for 6.5 hours after cleaning;

[0075] Step S2, mixing the above-mentioned Fe-Co alloy powder and organic additives uniformly by means of mechanical fusion, and discharging to obtain mixed alloy powder;

[0076] Step S3, mixing the mixed alloy powder and polyvinylpyrrolidone powder, adding deionized water, ultrasonicating for 58 minutes until the PVP powder is completely dissolved, continuing to mechanically stir the blend at a speed o...

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Abstract

The invention discloses a magnetic material for an iron core of a generator, which is prepared from the following main raw materials in parts by weight: Fe-Co alloy powder 84-85 parts, organic additive 0.001-0.1 part of polyvinylpyrrolidone powder 40-41 part. TEOS 115-125 copy. The organic additive is a small amount of polyamide resin and zinc stearate added into the phenolic resin. The inventionalso discloses a preparation method of the magnetic material for an iron core of a generator. Fe-Co alloy powder is that main body of the material, Fe-Co alloy powder is mixed with organic additive, and a layer of SiO2 shell is coated on the surface of the alloy powder. The magnetic material prepared according to the present invention is suitable for a motor core formed of a compressed powder block of a magnetic material and has a high magnetic and mechanical strength and also has a fatigue property and a resistivity sufficient to be permanently used as a motor core or the like, and is suitable for a motor core formed of a compressed powder block of a magnetic material.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a magnetic material used for a generator iron core and a preparation method thereof. Background technique [0002] The generator iron core is an important part of the motor magnetic circuit, and together with the rotor core, the air gap between the stator and the rotor, it forms the complete magnetic circuit of the motor. In an asynchronous motor, the magnetic flux in the stator core is alternating, resulting in core losses. [0003] As one of the key materials of the generator core, the quality and performance of the core magnetic sheet is directly related to the quality of the generator core, such as the cost, life, luminous intensity, power generation effect, etc. of the generator core. . The quality of the magnetic material used to prepare the core magnetic sheet has a lot to do with its formula and preparation process. Iron core magnetic sheets made...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/02H01F41/00H01F1/00H02K15/02
CPCH01F1/00H01F41/00H02K1/02H02K15/02
Inventor 周羊平段志平
Owner 浙江宝捷机电有限公司
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