PERMANENT MAGNET LINEAR MOTOR

PROBLEM TO BE SOLVED: To provide a permanent magnet linear motor having the small leakage of a magnetic flux so as not to operate a peripheral unit or a magnetic sensor for detecting a position by mistake or not to introduce the decrease in a working accuracy. SOLUTION: The permanent magnet linear motor comprises a pair of yokes 1, 2 constituted of magnetic materials parallel to each other, a field pole 4 constituted by linearly arranging a plurality of permanent magnets 3 so as to alternatively become hetero poles on the yokes 1 and 2, and an armature 5 having a coil row 51 so as to be opposed to the field pole 4 via a magnetic air gap, in such a manner that a movable element for relatively moving any one of the field pole 4 and the armature 5 to a stator as the other. In the linear motor, the yokes 1, 2 opposed to each other are coupled by a plurality of flat plate-like magnetic elements 6 at a predetermined interval toward its longitudinal direction.