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Mixed soft magnetic material and integrally molded inductor prepared thereby

A soft magnetic material, integrated technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, circuits, etc., can solve the problems of high compressibility, difficult stamping, low forming density, etc., to achieve low product loss, High efficiency, good saturation characteristics

Inactive Publication Date: 2019-10-08
TRIO TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The raw materials for the preparation of integrated inductors are generally soft magnetic metal powders. Since spherical powders of the same particle size are difficult to compress during molding and are not easy to be stamped, a powder with different particle sizes of large, medium and small is used for grading. , so as to solve the problem of high molding difficulty and low molding density

Method used

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  • Mixed soft magnetic material and integrally molded inductor prepared thereby
  • Mixed soft magnetic material and integrally molded inductor prepared thereby
  • Mixed soft magnetic material and integrally molded inductor prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take 1KG mixed soft magnetic powder with particle size grading (70 parts of carbonyl iron powder with a particle size of D50=5 μm and 30 parts of amorphous FeSiBCr powder with a particle size of D50=25 μm), and carry out passivation insulation treatment , and then mix and granulate the soft magnetic powder after the passivation insulation treatment and the binder.

[0044] Comparative Example 1 and Example 1 respectively use the same coil 1.4mm×2.8mm(OD)×1.5Ts to press the integrally formed inductor with the same size of 8mm×8mm×5mm, and the inductance range is 0.14uH±20%. Comparative Example 1 is 1L: 0.133uH powder 1, Example 1 is 2L: 0.133uH powder 2.

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Abstract

The invention discloses a mixed soft magnetic material and an integrally molded inductor prepared thereby. According to the technical scheme, two or more kinds of large, medium and small soft magneticpowder are used; the density of the soft magnetic powder filled per unit volume is maximized through grain size distribution of the mixed soft magnetic powder required for preparation; the soft magnetic powder used for mixing are in various large, medium and small particle size distributions in the shape of a sphere, a spheroid, a polygon or a plate; and the integrally molded power inductor madeof the soft magnetic material prepared with the high-density mixed powder has the advantages of higher initial permeability, better saturation characteristics, lower product loss and higher efficiency.

Description

technical field [0001] The invention relates to the field of soft magnetic materials, more specifically, it relates to a mixed soft magnetic material and an integrally formed inductor prepared therefrom. Background technique [0002] The integrally formed inductor includes two parts: the base body and the winding body. The base body is the alloy powder molding part, and the winding is the enameled coil and the anti-oxidation metal terminal part connected together. The winding body is embedded in the alloy powder, and die-cast by an integrated molding machine. The SMD pins are anti-oxidation metal terminals, and the lead-out pins of the pin winding body are directly formed on the surface of the seat body. Because of the good magnetic shielding effect of its fully enclosed structure, it can effectively reduce electromagnetic interference and avoid noise. It has the lowest DC impedance of the same size, and can ensure a smooth drop in the inductance value of the current resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/12H01F1/20H01F41/00B22F1/00B22F3/02
CPCH01F1/12H01F1/20H01F41/00B22F3/02B22F1/145
Inventor 饶金火林伙利
Owner TRIO TECH SUZHOU
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