High-magnetic-shielding inductor with molybdenum permalloy core and manufacture method thereof

A manufacturing method and inductor technology, applied in magnetic core manufacturing, inductor/transformer/magnet manufacturing, transformer/inductor casing, etc., can solve problems such as poor stability and shielding ability, poor temperature stability, and no specific instructions , to achieve the effects of good stability, excellent heat dissipation performance and excellent electromagnetic performance

Inactive Publication Date: 2017-06-13
宁波华众和创工业设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the relevant patents that have been applied in China, the patent "Shielded Inductor" (application number: 201410132078.9, publication date: 2014-07-16) discloses the structure of a shielded inductor, but it does not carry out the analysis of the nature of the material. Therefore, the basis for its stability and shielding ability is poor, and other materials and structures used are commonly used materials and structures in this field. As an inductor, its service life is short; Inductor" (application number: 201110138303.6, publication date: 2012-01-04), discloses a magnetically shielded inductor that can work normally under the influence of large current The material of the magnetic core is not specifically explained. According to the existing data, the magnetic core material with the highest magnetic flux density and the highest magnetic permeability is molybdenum core and ultrafine crystal core. Therefore, the magnetic dispersion of the invention Relative to the present invention, it must be greater, because the epoxy resin mixed with magnetic permeable material used in the potting magnetic shielding layer described in the present invention has a lower magnetic shielding effect than the silicone rubber and glass fiber mixture of the present invention, and the thermal conductivity Poor performance, poor temperature stability

Method used

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  • High-magnetic-shielding inductor with molybdenum permalloy core and manufacture method thereof

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Embodiment 1

[0036] A high magnetic shielding inductor using a molybdenum permal magnetic core, including a skeleton, a winding 4, a magnetic core 3, a shielding cover 1, and a packaging material; the aluminum nitride ceramic skeleton 2 is used; the winding 4 is made of 1140 epoxy Carbon fiber wire made of polyester insulating varnish; the shielding case 1 is made of aluminum alloy and packaged in a fully enclosed structure; the gap between the shielding case 1 and other parts except the shielding case 1 is filled with granular heat-conducting insulating material 5, the heat-conducting insulation Material 5 is a granular mixture of silicone rubber and glass fiber in a weight ratio of 9:1.

[0037] The above-mentioned manufacturing method of the high magnetic shield inductor using the molypermal magnetic core comprises the following steps:

[0038] 1) Selection and preparation of various components

[0039] ① The skeleton is selected from the aluminum nitride-based ceramic skeleton 2 that ...

Embodiment 2

[0063] A method for manufacturing a high magnetic shield inductor using a molypermal magnetic core, comprising the following steps:

[0064] 1) Selection and preparation of various components

[0065] ① The skeleton is selected from the aluminum nitride-based ceramic skeleton 2 that matches the square-shaped magnetic core 3, and the selection standard of the aluminum nitride-based ceramic is: volume resistivity ≥ 2×10 13 Ω cm, dielectric strength ≥ 750kV / cm, thermal conductivity ≥ 25W / m K, flexural strength ≥ 400Mpa, Young's modulus ≥ 320Gpa, fracture toughness ≥ 25Mpa;

[0066] ②Magnetic core 3 is made of molybdenum permalloy strip. The selection standard of this molybdenum permalloy strip is: its raw material contains 3.2%-3.8% molybdenum, 15.8%-17.2% iron, 79%-81% nickel, and its inductance The stability value is not higher than 0.03%, and the initial inductance offset range value is not higher than 0.3%;

[0067] ③The shielding cover 1 is made of aluminum alloy and adopt...

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Abstract

The invention discloses a high-magnetic-shielding inductor with a molybdenum permalloy core and a manufacture method thereof; the high-magnetic-shielding inductor with the molybdenum permalloy core can bear long-term operating temperature not less than 150 DEG C and has at least level T of electromagnetic shielding; the high-stability molybdenum permalloy core is acquired by controlling the formation and fixation of the molybdenum permalloy core and multiple circular process of impact-destressing-deforming-correcting-destressing; by using aluminum nitride based ceramic skeleton with excellent electromagnetic properties and a full-closed aluminum alloy shielding cover filled with heat transfer insulating material, the heat resistance and shielding performance of the inductor are improved; the high-magnetic-shielding inductor with the molybdenum permalloy core is tolerant to high temperature, good in electromagnetic shielding effect and long in service life.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a high magnetic shielding inductor using a molypermal magnetic core and a manufacturing method thereof. Background technique [0002] Inductor is a component that can convert electrical energy into magnetic energy and store it. Inductors are similar in construction to transformers, but have only one winding (6). Inductors have a certain inductance, which only resists changes in current. If the inductor is in a state where no current is flowing, it will try to block the current from flowing through it when the circuit is on; if the inductor is in a state where current is passing, it will try to maintain the current when the circuit is off. Inductors are also called chokes, reactors, and dynamic reactors. [0003] Molybdenum material has high magnetic permeability, saturation magnetic induction intensity and low coercive force and resistivity, mainly used in small, high-sens...

Claims

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Application Information

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IPC IPC(8): H01F27/02H01F27/22H01F27/25H01F27/26H01F27/30H01F27/36H01F41/00H01F41/02
CPCH01F27/306H01F27/022H01F27/22H01F27/25H01F27/266H01F27/36H01F41/00H01F41/0213
Inventor 何琳
Owner 宁波华众和创工业设计有限公司
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