Hitachi Metals, Ltd.

Jibu Electric Co., Ltd.

Kengo Takahashi

Daichi Azuma

Hitoshi Kodama

Yuji Nagata

An amorphous alloy magnetic core including a layered body in which amorphous alloy thin strips are layered one on another, the layered body having one end face and another end face in a width direction of the amorphous alloy thin strips, an inner peripheral surface and an outer peripheral surface orthogonal to a layering direction of the amorphous alloy thin strips, and a hole passing through from a part of the one end face as a starting point, the width direction corresponding to a depth direction of the hole.

Amorphous alloy magnetic core

A method of manufacturing an amorphous alloy magnetic core, which includes preparing a layered body by layering amorphous alloy thin strips one on another, and has one end face and another end face in a width direction of the thin strips and an inner peripheral surface and an outer peripheral surface orthogonal to a layering direction of the thin strips; forming a hole passing through from the one end face of the layered body as a starting point; subjecting the layered body to which the hole has been formed to a heat treatment while measuring an internal temperature of the hole; and forming a resin layer which blocks the hole and covers at least a part of the one end face by coating and curing a two-liquid mixed type epoxy resin composition having a viscosity of from 38 Pa&#xb7;s to 51 Pa&#xb7;s and a T. I. value of from 1.6 to 2.7 on at least a part of at least the one end face of the layered body after being subjected to the heat treatment.

Method of manufacturing amorphous alloy magnetic core

Method of manufacturing an amorphous alloy magnetic core

The present invention provides an Fe-based amorphous transformer magnetic core formed by stacking Fe-based amorphous alloy thin strips and satisfying the following (1) to (3) in a direct current B-H curve measured by applying a magnetic field of 80 A/m to the magnetic core:B80&#x2267;1.1 T&#x2003;&#x2003;(1)0.5 T&#x2266;Br&#x2266;0.7 T&#x2003;&#x2003;(2)B80&#x2212;Br&#x2267;0.6 T&#x2003;&#x2003;(3)wherein B80 represents a magnetic flux density (T) obtained when magnetization is performed in the magnetic field of 80 A/m, and Br represents a residual magnetic flux density (T) obtained when a magnetic field is changed to 0 A/m after magnetization is performed in a magnetic field of 80 A/m.

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Yasugi, Japan

Kengo Takahashi