| 摘要 |
PURPOSE:To improve rectangularity using magnetic elastic effect by adding a bending stress to an amorphous magnetic alloy thin belt. CONSTITUTION:A rolled iron core 2 is formed by winding amorphous magnetic alloy thin belt 1 having positive or negative magnetic stress except for zero to a bobbin 3a having a larger diameter. Namely, a rolled iron core 2 is formed by adding a bending stress corresponding to a larger bending diameter and an internal stress is eliminated by executing annealing to such rolled iron core 2. Thereafter, an amorphous magnetic alloy thin belt 1 is wound again to a bobbin 3b having smaller diameter. Namely, a stress as large as the difference can be given to the rolled iron core 2 by giving a bending stress corresponding to such small diameter. In this case, it is assumed that stresses having directivity are applied to each part of amorphous magnetic alloy thin belt 1 in place of a plurality of random stresses before the annealing for eliminating stress, namely a large tension is applied to the external size while a large compress force is applied to the internal side. Thereby, high rectangularity can be achieved. |
