| 摘要 |
PURPOSE:To increase the thrust/weight with a simple structure and to eliminate the pulsation of a thrust by internally bonding and securing a permanent magnet on the inner wall of an electromagnet nut and linearly dirving it by the revolving magnetic field of the nut. CONSTITUTION:When a movable element 7 is moved along a movable shaft 8, moire fringes are formed at the center line of the thread and the central line of the pole of a permanent magnet 4, and the fringe for connecting the crossing point is revolved. The moire fringes are formed of two crossing point rows of N-poles and two crossing point rows of S-poles, and these fringes have a difference of 90 deg.C from each other. Accordingly the magnetic flux of four poles is revolved. The magnetic flux varies in one cycle by the movement of the thread at one pitch, and a revolving magnetic flux revolves at 180 deg.. On the other hand, when a current is flowed in a winding to form a magnetic field of four poles, 4 poles are induced the threads of a rod in this manner. The element 7 is driven in a direction of the moving axis 8 by the poles. |
