| 摘要 |
<p>PURPOSE:To eliminate the effect of external magnetic fields to a motor and to make the shape of the motor thin, by providing a layer comprising a high-permiability material on the surface of a stator plate comprising non-magnetic material to which a yoke is fixed. Said surface is on the other side of the plate with respect to the contact surface of the yoke. CONSTITUTION:A yoke 1 comprising high-permiability material is fixed to a stator plate 2 comprising non-magnetic material such as stainless steel and the like by projection welding and the like. The yoke 1 is divided into a pair of right and left portions, and a hole to accomodate a rotor 4 is provided. The surface of the stator plate 2 which opposes at least the rotor 4 and the exposed portion of the contact surface with the yoke 1 are screened by metal masks. A high-permiability-material layer 7 is formed on the surface of the stator plate 2 which is on the other side with respect to the contact surface with the yoke 1 by a dry-plating method such as ion plating, vacuum evaporation, or the like. Thereafter, magnetic annealing is performed.</p> |
