| 摘要 |
PURPOSE:To distribute magnetic flux density in a sine waveform and enhance widely-using property, by setting a distance between the inner peripheral face of a magnet and the surface of a yoke, within a specified limit, when the inner peripheral face of the magnet is made to confront the magnetizing yoke having convex yokes and is magnetized. CONSTITUTION:When a magnetizing yoke 7 having convex yokes is positioned on the inner peripheral side of a ring magnet 8 formed with hard magnetic substance and the isotropic ring magnet is magnetized to be formed, then a space is provided between the apex sections of each convex yoke and the inner peripheral face of the magnet 8. The space distance T is set to be 1-5mm. As a result, the density of magnetic flux 6 with the even quantity of the flux can be distributed almost in a sine waveform, and a plurality of the ring magnets can be produced by one magnetizing yoke 7. |
