| 摘要 |
PURPOSE:To provide excellent response property even if sectional area of an armature itself is small, by a method wherein an auxiliary yoke is connected to one end of a yoke, and magnetic flux of the armature is by-passed by the auxiliary yoke. CONSTITUTION:If voltage is applied to a coil 8, magnetomotive force is generated and flowing of magnetic flux X1, X2 is produced. X1; yoke 7 auxiliary yoke 9 free end 10c of armature 10 armature surface 7a, X2; yoke 7 leg 10d of armature 10 free end 10c of armature 10 armature surface 7a. Such magnetic flux produces attractive force at an air gap T between the free end 10c of the armature 10 and the armature surface 7a of the yoke, thereby the armature 10 is attracted to the armature surface 7a about the base end 10a as fulcrum. Since the armature 10 has the auxiliary yoke 9 in parallel, the magnetic flux is by-passed thereby sectional area of the armature 10 at intermediate part may be reduced. In this constitution, the electromagnet is improved in the working time and the working speed. |
