| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight of a combined linear motor device. SOLUTION: A unit linear motor is constructed of an armature and a stator. The armature has a coil that generates a shifting magnetic field and can be moved along a linear traveling passage. The stator is so constructed that permanent magnet trains are disposed on both sides of the traveling passage of the armature along the travelling passage with a gap between them and the armature. Each permanent magnet train is so constructed that adjoining permanent magnets constructing the permanent magnet train are disposed with an equal pitch with opposite polarities and the permanent magnets of the opposite faces of opposite permanent magnet trains are of opposite polarities. More than one unit linear motor is arranged along the traveling passage of the armature in parallel with each other to construct a combined linear motor so constructed that the permanent magnets of the opposite faces of the opposite permanent magnet trains are of opposite polarities. A back yoke is disposed along the anti-traveling passage side of the permanent magnet trains on the outermost sides of the combined linear motor. COPYRIGHT: (C)2008,JPO&INPIT
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