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Magnetic core and preparation method thereof, inductor and filter

A magnetic core and winding technology, which is used in inductors with magnetic cores, magnetic core manufacturing, transformer/inductor magnetic cores, etc., can solve the problems of EMI filter magnetic core selection and targeted production difficulties, and reduce Volume and complexity, reduced eddy current loss, beneficial effect of post-processing

Pending Publication Date: 2020-08-25
麦格磁电科技(珠海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a magnetic core and its preparation method, inductor and filter, to solve the problems of EMI filter magnetic core selection and targeted production difficulties in the prior art, which can overcome the above problems or at least partially Solve the above technical problems

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  • Magnetic core and preparation method thereof, inductor and filter
  • Magnetic core and preparation method thereof, inductor and filter
  • Magnetic core and preparation method thereof, inductor and filter

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preparation example Construction

[0123] In a fourth aspect, the present application provides a method for preparing a magnetic core, the magnetic core is the magnetic core as described above, and the preparation method includes:

[0124] Provide a magnetic tape and an adhesive layer, and laminate the magnetic tape and the adhesive layer to obtain a composite magnetic material layer;

[0125] unitizing at least one of the composite magnetic material layers;

[0126] A plurality of the composite magnetic material layers are laminated and then wound, wherein at least two of the composite magnetic material layers have different magnetic properties.

[0127] The preparation method of the magnetic core is composed of layered composite magnetic materials with different properties, which can meet the anti-EMI requirements of different power ranges and frequency ranges. In the method, a plurality of composite magnetic materials are stacked together, and then can be wound. The method has the characteristics of simple ...

Embodiment 1

[0155] The commercially available 1k107B nanocrystalline ribbon (thickness 20μm±2μm, width 10mm) was used as raw material to produce filter inductor cores. Specifically include the following steps:

[0156] S1: Divide the raw strip into small rolls of 300m±50m, put them into a heat treatment furnace for heat treatment.

[0157] S2: Heat treatment system: heat up to 560°C at a heating rate of 2°C / min, then hold for 90 minutes, then cool naturally to 200°C, then take it out of the furnace and cool to room temperature. During the whole heat treatment process, nitrogen with a purity of more than 99.999% is used as the protective atmosphere.

[0158] S3: The relative magnetic permeability of the material after heat treatment reaches 13000~20000@100kHz;

[0159] S4: One side of the heat-treated magnetic strip is coated with a PET film coated with an acrylic adhesive on one side, and the total thickness of the film is 5 μm±1 μm.

[0160] S5: Use 40-mesh anilox rollers for unitized...

Embodiment 2

[0171] The commercially available 1k107B nanocrystalline ribbon (thickness 20μm±2μm, width 10mm) was used as raw material to produce filter inductor cores.

[0172] S1: Divide the raw strip into small rolls of 300m±50m, put them into a heat treatment furnace for heat treatment.

[0173] S2: Heat treatment system: heat up to 560°C at a heating rate of 2°C / min, then hold for 90 minutes, then cool naturally to 200°C, then take it out of the furnace and cool to room temperature. During the whole heat treatment process, nitrogen with a purity of more than 99.999% is used as the protective atmosphere.

[0174] S3: The relative magnetic permeability of the material after heat treatment reaches 13000~20000@100kHz;

[0175] S4: One side of the heat-treated magnetic strip is coated with a PET film coated with an acrylic adhesive on one side, and the total thickness of the film is 5 μm±1 μm.

[0176] S5: Use 40-mesh anilox rollers for unitized operation to reduce the relative magnetic ...

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Abstract

The invention provides a magnetic core and a preparation method thereof, an inductor and a filter, and relates to the technical field of anti-EMI magnetic cores and inductance elements. The magnetic core is mainly formed by mutually overlapping and winding a plurality of composite magnetic material layers; each composite magnetic material layer comprises a magnetic strip and a bonding layer; at least one composite magnetic material layer is a composite magnetic material layer obtained after unitization treatment; and the magnetic properties of the at least two composite magnetic material layers are different. The problem that in the prior art, selection and targeted production of an EMI filter magnetic core are difficult can be solved.

Description

technical field [0001] The application belongs to the technical field of anti-EMI magnetic cores and inductance components, and in particular relates to a magnetic core, a preparation method thereof, an inductor and a filter. Background technique [0002] Electromagnetic interference filter, also known as EMI filter, is an electronic component used to suppress electromagnetic interference, especially noise in power lines or control signal lines. The main component of the EMI filter is the magnetic core. At present, the magnetic core is generally made of soft ferrite material or iron-based nanocrystalline alloy material into a ring shape or other similar shapes. In order to suppress different EMI noise sources, it is usually necessary to carefully select the size, permeability, material, and frequency characteristics of the magnetic core to achieve the effect of suppressing noise in a specific frequency band. Due to the various forms of EMI noise, it is necessary to consider...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/245H01F27/25H01F41/02H01F17/04
CPCH01F17/04H01F27/245H01F27/25H01F41/022H01F41/0226
Inventor 尉晓东刘志坚刘光荣王亮任美娜武钧
Owner 麦格磁电科技(珠海)有限公司
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