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Manufacturing method of high-performance power inductor

A technology of a power inductor and a manufacturing method, which is applied to the manufacturing field of high-performance power inductors, can solve the problems of coil puncture, leakage coil, coil deformation, etc., and achieve the effects of avoiding coil deformation, improving comprehensive performance, and improving magnetic permeability.

Pending Publication Date: 2022-03-04
宁波汇芯智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of low powder filling density and exposed coil on the side wall of the inductor caused by the direct powder filling process in the prior art, as well as the deformation of the coil during the pressing process, the coil being punctured by the powder, and the leakage of coil and copper leakage. It leads to problems such as poor interlayer insulation. A method for manufacturing high-performance power inductors is provided. The invention adopts prefabricated T-shaped and cup-shaped blanks, and then glues and assembles them to prepare power inductors. This process is simple and only requires a very low cost. High-performance inductors can be obtained with a minimum molding pressure

Method used

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  • Manufacturing method of high-performance power inductor
  • Manufacturing method of high-performance power inductor
  • Manufacturing method of high-performance power inductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The soft magnetic alloy powder in the present embodiment selects the composite powder that Fe-Ni soft magnetic alloy powder and iron powder mix, and used binding agent is epoxy resin and sodium silicate, and used lubricant is graphene, and Fe-Ni soft magnetic alloy The powder and iron powder are uniformly mixed according to the preset first mass ratio of 5:5 to form a powder, and the powder is mixed with the binder, lubricant and acetone according to the preset second mass ratio of 100:3:0.1:12, ring Oxygen resin and sodium silicate are mixed evenly at a mass ratio of 1:2, and then granulated, and the powder with a particle size of -80 mesh to +200 mesh is screened out with an ultrasonic vibrating sieve to obtain the target soft magnetic powder material. In this embodiment, the power inductor The preparation method specifically comprises the following steps:

[0048] S1. Preparation of T-shaped sintered body: as figure 2 As shown, put the screened soft magnetic alloy ...

Embodiment 2

[0076] In this example, the soft magnetic alloy powder is a composite powder of Fe-Si-B-Nb-Cu nanocrystalline soft magnetic alloy powder mixed with iron powder, and the rest of the manufacturing method, steps, and process parameters are the same as in Example 1 to obtain a power inductor. Using the same performance test conditions as in Example 1, the obtained performance parameters are shown in Table 2.

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Abstract

The invention relates to the field of inductor manufacturing, and discloses a manufacturing method of a high-performance power inductor. The manufacturing method comprises the following steps: S1, preparing a T-shaped sintered blank; s2, winding is carried out; s3, preparing a cup-shaped sintered green body; s4, gluing is carried out; s5, assembling the T-shaped sintering green body and the cup-shaped sintering green body; s6, spraying is conducted; and S7, manufacturing an electrode to obtain the high-performance power inductor. The power inductor is prepared by prefabricating the T-shaped blank and the cup-shaped blank and gluing and assembling the blanks, a direct powder filling method in an existing manufacturing process is replaced, and the problems of loose powder and low compaction density during direct powder filling in the existing manufacturing process are solved by controlling the weight and the size of the prefabricated T-shaped and cup-shaped blanks; and coil deformation and fracture caused by overlarge forming pressure in an existing pressing process are avoided, and the comprehensive performance of a product is improved.

Description

technical field [0001] The invention relates to the field of manufacturing inductors, in particular to a method for manufacturing high-performance power inductors. Background technique [0002] With the development of electronic components in the direction of miniaturization, low installation thickness, low electromagnetic interference and high efficiency, inductors must also cater to this trend. As one of the important categories of electronic components, power inductors have the characteristics of small size, low cost, excellent shielding performance, high reliability, high efficiency, high saturation characteristics, and are suitable for high-density surface mounting. They are widely used in mobile communications, Computers, automotive electronics, high-resolution television, broadcast satellites and other fields have gradually become the mainstream of the inductor market. [0003] At present, the power inductor is mainly composed of three parts: magnetic powder, conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F41/06H01F41/076H01F41/00
CPCH01F41/0246H01F41/06H01F41/076H01F41/005H01F41/02
Inventor 顾爱爱
Owner 宁波汇芯智能装备有限公司