Constant-permeability iron core material for anti-direct-current component mutual inductor and preparation method of constant-permeability iron core material

A transformer and anti-DC technology, applied in the direction of magnetic materials, manufacturing tools, magnetic objects, etc., can solve the problems of increasing production costs, restricting production efficiency, and low detection efficiency of amorphous iron cores, so as to improve production efficiency and excellent magnetic characteristics, the effect of avoiding multiple magnetization processes

Inactive Publication Date: 2015-06-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to prepare this kind of composite iron core, it is necessary to separately anneal the nanocrystalline iron core and the amorphous iron core, especially the multi-step annealing for the amorphous iron core. In addition, the detection efficiency of the amorphous iron core is also low. , these have increased production costs and restricted the improvement of production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the following formula: cobalt (Co): 3.2Kg, nickel (Ni): 1.7Kg, manganese (Mn): 0.5Kg, chromium (Cr): 0.01Kg, silicon (Si): 2.4Kg, boron (B): 0.51 Kg, Iron (Fe): 11.68Kg, smelted in a 20Kg vacuum melting furnace;

[0021] a. Cast into master alloy;

[0022] b. The master alloy is sprayed into an amorphous strip with a thickness of 27 μm by a single-roller spin quenching method;

[0023] c. Wind the sprayed strips into annular iron cores with inner diameter, outer diameter, width and height of 17mm, 24mm, and 8mm respectively;

[0024] d. Perform transverse magnetic heat treatment on the annular iron core in a transverse magnetic furnace, wherein: the applied transverse magnetic field strength is 2.8×10 4 KA / m, the annealing temperature of the transverse magnetic furnace is 450°C, and the holding time is 2h;

[0025] e. The cooling rate is 3°C per minute, out of the oven below 300°C, and then naturally cooled to room temperature.

[0026] The X-ray diffr...

Embodiment 2

[0030] According to the following formula: cobalt (Co): 4.8Kg, nickel (Ni): 1.9Kg, manganese (Mn): 0.7Kg, chromium (Cr): 0.02Kg, silicon (Si): 2.8Kg, boron (B): 0.58 Kg, iron (Fe) 9.2Kg, smelted in a 20Kg vacuum melting furnace;

[0031] a. Cast into master alloy;

[0032] b. Spray the master alloy into an amorphous strip with a thickness of 30 μm by single-roller spin quenching method;

[0033] c. Wind the sprayed strips into annular iron cores with inner diameter, outer diameter, width and height of 17mm, 24mm, and 8mm respectively;

[0034] d. Perform transverse magnetic heat treatment on the annular iron core in a transverse magnetic furnace, wherein: the applied transverse magnetic field strength is 2.8×10 4 KA / m, the annealing temperature of the transverse magnetic furnace is 470°C, and the holding time is 3h;

[0035] e. The cooling rate is 3°C per minute, out of the oven below 300°C, and then naturally cooled to room temperature.

[0036] Validation results:

[0...

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Abstract

The invention discloses a constant-permeability iron core material for an anti-direct-current component mutual inductor and a preparation method of the constant-permeability iron core material. The iron core is made of an iron-cobalt-based amorphous alloy. The preparation method comprises the following steps: smelting a master alloy; spouting a zone; winding; and performing transverse magnetic annealing, wherein the iron-cobalt-based constant-permeability iron core comprises the following components in percentage by weight: 16-24 percent of cobalt (Co), 8.5-9.5 percent of nickel (Ni), 2.5-3.5 percent of manganese (Mn), 0.05-0.1 percent of chromium (Cr), 12-14 percent of silicon (Si), 2.55-2.9 percent of boron (B) and 46-58.4 percent of ferrum (Fe). The amorphous constant-permeability iron core prepared with the method has excellent magnetic characteristic, particularly low remanent magnetism and coercive force, and high saturation induction density; and moreover, the iron core keeps relatively constant magnetic conductivity in a static bias field of 420A / m, and the iron core is brought into full play, so that the iron-cobalt-based constant-permeability iron core has higher practical application value in the field of anti-direct-current component mutual inductors.

Description

technical field [0001] The invention belongs to the technical field of preparation of constant-permeability magnetic cores, and in particular relates to a preparation method of constant-permeability magnetic cores used for anti-DC component transformers. Background technique [0002] With the development of economy and society, a large number of frequency conversion, switching power supply and rectification equipment are widely used. A large number of applications of these devices directly lead to serious waveform distortion in the line, and the DC component contained in it gradually increases. Due to the high magnetic permeability of the microcrystalline transformer, it is easy to cause saturation, so that it cannot induce a high enough voltage in the secondary coil, so it will cause a huge error to the control circuit, which can easily lead to safety accidents. Therefore, measures must be taken to prevent the transformer from being magnetized and saturated when there is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C21D1/26C21D1/04C21D9/00C22C45/02
Inventor 吴玉程李鹏苏海林汤凤林笪建国
Owner HEFEI UNIV OF TECH
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