Magnetic element

一种磁性元件、磁性体的技术，应用在磁性材料、磁性物体、电气元件等方向，能够解决非晶箔带制造成本变高、磁性材料实用化迟缓、磁性材料成型性差等问题，达到实现制造设备费、形状自由度提高、制造成本降低的效果

Active Publication Date: 2016-11-09
NTN CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned compression-molded magnetic materials have poor formability and low mechanical strength after firing.
In addition, the manufacturing cost of the above-mentioned amorphous foil tape becomes high due to winding, cutting, and gap formation.
Therefore, the practical application of these magnetic materials is slow

Method used

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Embodiment Construction

[0028] In the high frequency and high current of electric and electronic equipment, the magnetic element using the ferrite material obtained by the current mainstream compression molding method has excellent magnetic permeability and easy to obtain inductance value, but the frequency characteristic and superimposed current characteristic are poor . On the other hand, a magnetic element using an injection-molded magnetic material containing an amorphous material has excellent frequency characteristics and superimposed current characteristics, but has low magnetic permeability. In addition, in magnetic elements for large currents, in addition to heat generation due to copper loss, heat generation due to iron loss cannot be ignored. Therefore, by using a compression-molded magnetic body with excellent thermal conductivity for the part that is prone to heat generation or the part that is difficult to dissipate heat, and molding and bonding other large or complex-shaped magnetic bo...

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Abstract

Provided is a magnetic element which exhibits excellent producibility and suppresses heat generation caused by iron loss. A magnetic element provided with a magnetic body though which magnetic flux produced by a coil (4) passes, wherein: this magnetic body is a joined body obtained by joining magnetic bodies to one another which are bisected in the axial direction of the coil; a section exhibiting high heat generation caused by iron loss or a section exhibiting poor heat-dissipation properties constitutes a compression-molded magnetic body (2), while a section other than this compression-molded magnetic body constitutes an injection-molded magnetic body (3); and the compression-molded magnetic body and the injection-molded magnetic body are joined to one another. Furthermore, the compression-molded magnetic body is exposed on the surface of the magnetic body.

Description

technical field [0001] The present invention relates to a magnetic element in which a coil is wound around a magnetic body. In particular, it relates to magnetic elements used in electric or electronic equipment as inductors, transformers, antennas (rod antennas), choke coils, filters, sensors, and the like. Background technique [0002] In recent years, in the process of high-frequency and high-current development of electrical and electronic equipment, the same response is expected in magnetic elements, but currently as a magnetic body, in the mainstream ferrite materials, the material characteristics themselves have reached At the limit, we are exploring new magnetic materials. For example, the ferrite material is replaced by sendust, compression-molded magnetic material such as amorphous, amorphous foil, and the like. However, the above-mentioned compression-molded magnetic material has poor formability and low mechanical strength after firing. In addition, the manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F27/255
CPCH01F3/10H01F17/043H01F27/255H01F37/00H01F2003/106H01F1/14733H01F1/14791H01F27/2823
Inventor 堺香代岛津英一郎宫崎真二小田贵之
Owner NTN CORP
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