| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost linear motor for machine tool which is excellent in productivity and is possible of high-speed positioning, being equipped with a stator having equal magnet row pitches. SOLUTION: This linear motor 10 for a machine tool comprises a stator 13 where a plurality of permanent magnets 12 in the same form being magnetized in the vertical direction to the face of a yoke 11 are arrayed, at equal intervals in the shifting direction of a moving member so that the direction of the magnetization may be different from adjacent permanent magnets 12, on both sides of the plate-shaped yoke 11, and a pair of moving members 16 where armature coils 14 with armature coils 15 wound are counterposed severally to the rows of each permanent magnet 12 provided on both sides of the plate-shaped yoke 11 so that the central axis of each armature coil 15 may be parallel with the direction of the magnetization of each permanent magnet 12. After the plurality of permanent magnets 12 are arrayed on both sides of the plate-shaped yoke 11, surface processing films are made on the exposed faces of the permanent magnets. COPYRIGHT: (C)2006,JPO&NCIPI
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