| 摘要 |
In order to precisely install a permanent magnet type linear motor on a machine tool without being influenced by magnetic fields, a stator is provided with a magnet support which extends in parallel with the lengthwise direction of the linear motor and whose cross section perpendicular to the lengthwise direction of the linear motor is polygon or circular. The stator further comprises a plurality of permanent magnet arrays mounted on the outer surface of the magnet support in parallel with the lengthwise direction of the linear motor. The stator is held at both ends thereof by stator supports. On the other hand, a movable body has a hollow member extending in parallel with the lengthwise direction of the linear motor and surrounding part of the stator. Further, the movable body is provided with a plurality of armature modules each of which comprises an armature core and armature coils mounted thereon. The plurality of armature modules are mounted on the inner surfaces of the hollow member such that the lengthwise axes thereof are in parallel with the lengthwise direction of the linear motor and such that the armature modules respectively face the permanent magnet arrays with an air gap therebetween. <IMAGE> |
