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Magnetic core and coil parts

A technology of magnetic core and core loss, applied in the direction of magnetic core/yoke, transformer/inductor magnetic core, transformer/inductor components, etc., can solve the problems of low resistivity and high saturation magnetic flux density of magnetic core

Active Publication Date: 2020-06-09
HITACHI METALS LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The magnetic core obtained by compacting the molded body of the magnetic alloy powder has a high saturation magnetic flux density. On the other hand, since it is an alloy powder, the resistivity is low, and water glass, thermosetting resin, etc. are used in advance to form a magnetic core. Magnetic alloy powder for insulation coating

Method used

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  • Magnetic core and coil parts
  • Magnetic core and coil parts
  • Magnetic core and coil parts

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Embodiment

[0063] Next, preferred embodiments of the present invention will be explained in detail by way of example. In addition, in the description, a Fe-Al-Cr based alloy is used as the Fe-based alloy. However, the scope of the present invention is not limited to the following examples unless there is a description of particular limitations on materials, compounding amounts, and the like described in the examples.

[0064] (1) Preparation of raw material powder

[0065] The raw material powder of the Fe-based alloy was produced by an atomization method. Table 1 shows the composition analysis results. In addition, the raw material powders A to D were produced by an atomizing device based on the rotating disk method, and the raw material powders E to L were produced by a high-pressure water atomizing device.

[0066] Table 1

[0067]

[0068] ※ "Rotary" in the manufacturing method means an atomizing device based on the rotating disk method, and "high-pressure water" means a high-...

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Abstract

Provided are a magnetic core having high initial magnetic permeability and low core loss, and capable of reducing core loss under high frequency conditions, and a coil component using the same. A magnetic core in which a plurality of Fe-based alloy particles containing Al are bonded via an oxide layer containing Fe oxide, wherein in the X-ray diffraction spectrum of the magnetic core measured using Kα characteristic X-rays of Cu, in The peak intensity P1 of the diffraction peak from the Fe oxide having the corundum structure appearing around 2θ=33.2° and the peak intensity P2 of the diffraction peak coming from the Fe-based alloy having the bcc structure appearing around 2θ=44.7° The peak intensity ratio (P1 / P2) is 0.010 or less (excluding 0), and Fe is in the range of 2θ=20°~40° 3 The superlattice peak intensity of Al regular structure is below the noise level.

Description

technical field [0001] The present invention relates to a magnetic core using metal-based magnetic powder, and in particular, to a magnetic core using Al-containing Fe-based alloy powder as the metal-based magnetic powder, and to a coil component using the magnetic core. Background technique [0002] Conventionally, coil components such as inductors, transformers, choke coils, and motors have been used in various applications such as home appliances, industrial equipment, and vehicles. Common coil components are often composed of a magnetic core (magnetic core) and a coil wound around the magnetic core. As the magnetic core, ferrite excellent in magnetic properties, shape freedom, and price is widely used. [0003] In recent years, with the miniaturization of power supply devices such as electronic equipment, the demand for coil components that are small, low in height, and can be used under high current has become stronger and stronger. Compared with ferrite, it has tended...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147B22F1/00B22F1/02C22C38/00H01F1/24H01F1/33H01F27/255H01F37/00B22F3/00B22F1/16
CPCH01F1/147H01F1/24H01F1/33H01F27/255H01F41/0246H01F3/08C22C38/06C22C38/02C22C38/18C22C2202/02B22F2998/10C22C33/0264C21D6/002C21D8/1244B22F3/00B22F1/00B22F1/10B22F9/082B22F3/02B22F2003/248H01F27/2823H01F37/00H01F1/0551H01F27/24H01F27/29C22C38/00
Inventor 三原敏男加藤哲朗西村和则野口伸
Owner HITACHI METALS LTD