| 摘要 |
PURPOSE:To enable to increase the rigidity of an iron core without causing the increase of iron loss by a method wherein protection plates composed of nonmagnetic material are provided by superposition on both sides of the main body of the iron core produced by laminating amorphous magnetic steel plates. CONSTITUTION:A laminated iron core is formed by combining yoke cores 3 and leg cores 4 alternately. Each of these iron cores 3 and 4 forms the main body 1 of the iron core by laminating many thin amorphous magnetic steel plates formed by punching. The protection plates 2 composed of nonmagnetic material are provided by superposition on both the sides of this main body 1, respectively, and the entire surfaces of both the sides of the main body 1 are covered respectively with these protection plates 2. The total size of cross-sectional areas of both the protection plates 2 provided on both the sides of this main body 1 is set at a rate of 10% or less of the total cross-sectional area of iron cores consisting of both these protection plates 2 and the main body 1. Such a constitution enables to alleviate outer force applied on the amorphous magnetic plates 2, since the outer force applied when the iron core is fixed by clamping with bolts and binds, etc. is fitst received by the protection plates 2. Thereby, the amorphous magnetic steel plates can be prevented from being broken by outer force. |
