Linear motor

摘要

A mover includes a permanent magnet array in which a plurality of permanent magnets are disposed. The plurality of permanent magnets are magnetized in a perpendicular direction perpendicular to a motion direction of the mover such that magnetic poles having different polarities alternately appear on magnetic pole surfaces of the plurality of permanent magnets in the motion direction. A stator includes a first magnetic pole portion array, a second magnetic pole portion array, and three excitation windings. The first and second magnetic pole portion arrays each include a plurality of plate-like magnetic pole portions disposed on both sides of the permanent magnet array in the perpendicular direction. Each of the three excitation windings is hollow-structured by winding a winding conductor into a coil such that two magnetic pole portions included in the first magnetic pole portion array and two magnetic pole portions included in the second magnetic pole portion array are located in an internal space of the coil and are excited by the corresponding one of the excitation windings.