Iron-based constant-permeability nano crystal magnetic core and production method thereof

A nanocrystalline and magnetic core technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve problems affecting the continuous preparation of strips, insufficient fluidity of molten steel, and high brittleness of strips, etc., to achieve Simple and fast production process, low coercive force, strong corrosion resistance and thermal stability

Active Publication Date: 2015-02-25
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the preparation process of nanocrystalline alloy strips with this composition, the continuous preparation of strips is often affected due to insufficient fluidity of molten st

Method used

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  • Iron-based constant-permeability nano crystal magnetic core and production method thereof
  • Iron-based constant-permeability nano crystal magnetic core and production method thereof
  • Iron-based constant-permeability nano crystal magnetic core and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 is used to prepare the alloy of magnetic core to be Fe 73.5 Cu 1 Nb 3 Si 15.5 B 7

[0062] In this embodiment, 6 groups of tests were carried out, wherein the first four groups (1-4) were products of the present invention, and the latter two groups (5-6) were comparative examples.

[0063] The preparation method is as follows:

[0064](1) According to the composition and raw material ratio of each experimental combination of gold in Table 1, the alloy raw materials were vacuum smelted at 1350 ° C to prepare a master alloy ingot; then the master alloy ingot was put into a vacuum induction furnace for secondary melting Then under the protection of argon, while maintaining the constant pressure in the furnace, the quenched amorphous alloy thin strip with a width of 30 mm and a thickness of 22 μm is made by using a single roll quenching method, wherein the roll is a copper roll, and the surface speed of the roll is 25 m / s;

[0065] (2) Cut the thin stri...

Embodiment 2

[0078] Each group of magnetic cores in Example 1 is made into a current transformer through processes such as surface treatment, packaging, copper wire winding, and testing. The performance parameters of the obtained current transformers are shown in Table 2. The relative error RE and phase difference θ in the table are tested by the transformer calibrator, and the rated primary current of the test is 60A.

[0079] Table 2 Alloy heat treatment method and performance data of current transformer

[0080]

[0081] Magnetic core provided by the present invention can be used for current transformer, see Figure 10 , which is an equivalent circuit diagram of a known current transformer. The current transformer includes the magnetic core provided by the present invention, and additionally has a primary winding and at least one secondary winding. The primary winding usually has one turn. As can be seen from Table 2, the current transformer of the present invention has a small abs...

Embodiment 3

[0083] Each group of magnetic cores in Example 1 is made into a current compensation choke coil through processes such as surface treatment, packaging, copper wire winding, and testing. The performance parameters of the obtained current transformers are shown in Table 3.

[0084] Table 3 Alloy heat treatment method and performance data of current compensation choke coil

[0085]

[0086] The magnetic core provided by the present invention can be used for current compensation choke coil, see Figure 11 , which is a working principle diagram of the known current compensation choke coil. The current compensation choke coil of the present invention has the above-mentioned magnetic core. Phase or multi-phase current has more than three windings with the same turns and the same direction. The current compensation choke coil provided by the invention has strong anti-saturation capability, and the loss value is less than 50W / kg under the condition of 500mT / 20kHz.

[0087] Based ...

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Abstract

The invention discloses an iron-based constant-permeability nano crystal magnetic core and a production method thereof. The magnetic core is made of iron-based alloy. The molecular formula of the iron-based alloy is FeaCubNbcSidBeMfXg, wherein M is at least one of V, Ti, Mn, Cr and Mo and X is at least one of C, Ge, P and impurities. The production method includes: thermally processing an amorphous alloy thin strip while applying tensile stress along the length direction of the strip; winding the strip to produce the magnetic core of a certain size. The method has the advantages that the magnetic domain structure and distribution in the strip during crystallization can be adjusted by adjusting the process parameters such as tension magnitude and temperature during thermal processing according to different components and final performance requirements so as to obtain the constant-permeability magnetic core, and the height of the permeability is adjustable under direct currents and alternating currents. In addition, the relative initial permeability of the magnetic core is 50-2000 under a direct current condition and by the aid of simulation impact method testing.

Description

technical field [0001] The invention relates to a constant magnetic permeability core, in particular to an iron-based constant magnetic permeability nanocrystalline magnetic core and a preparation method thereof, that is, it has a constant relative magnetic permeability, and the magnetic permeability is highly adjustable for AC and DC components The Fe-based nanocrystalline magnetic core and its preparation method, and the application of this magnetic core in anti-DC current transformer and current compensation choke coil. Background technique [0002] In current transformers and current compensation chokes, it is required that the magnetic permeability of the applied magnetic core has a high degree of modulability to the AC and DC components. Among them, in view of the development of power electronic technologies such as electronic smart meters and frequency conversion air conditioners, the current transformers used in their circuits are required to have a strong ability to...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F27/255H01F41/02C22C33/04B22F1/00H01F38/28
Inventor 吴晓荣薄希辉李准冯硕倪晓俊李德仁卢志超
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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