| 摘要 |
<p>PURPOSE:To obtain the electromagnet device having excellent efficiency by a method wherein a movable part is shifted in the axial direction of a core, and the magnetic flux of a permanent magnet forms a closed magnetic circuit both in an excited condition and a non-exicted condition. CONSTITUTION:In a non-excited condition, a connected magnetic piece 17 is pulled nearer to a core magnetic pole part 11 and separated magnetic pieces 18 are pulled to a yoke magnetic pole part 13 respectively. The magnetic flux of a permanent magnet 16 forms a closed magnetic circuit which returns to the permanent magnet from magnetic pieces 18 passing through a side part magnetic pole part 13, a yoke 7, a core 6, a magnetic pole part 11 and a magnetic piece 17. When a current runs on a coil 5 and it is excited in such a manner that the magnetic pole parts 13, 13 and 14 of the yoke 7 will be turned to N-pole and the core magnetic pole part 11 is turned to S-pole, an armature block 3 is repulsed. The magnetic piece 18 are pulled to the core magnetic pole part 11, the magnetic piece 17 is pulled to the center magnetic pole part 14, and the magnetic flux of the permanent magnet 16 forms a closed circuit which returns to the permanent magnet 16 from the magnetic pieces 18 passing through a magnetic pole part 11, a core 6, the yoke 7, the center magnetic pole part 14 and the magnetic piece 17. The armature block 3 which is a movable part, is shifted in the axial direction of the core 6.</p> |
