Patent ID: 7944095
Filing Date: 2011-05-17
Classification: H02K

Abstract:
1. A linear motor, comprising; two stators extending in parallel and having salient poles arranged at a predetermined interval on opposing surfaces, a mover having three types of mover blocks made up of three-phase alternating current coils configuring magnetic poles of three phases and permanent magnets arranged in alternating polarities on two surfaces of said mover blocks opposing each of said two stators, and movable between said two stators along a direction in which the stators extend, wherein a plurality of linear motors are arranged in parallel with respect to a travel direction of the mover, and the two stators provided between adjacent movers are integrally formed as a single piece stator unit such that the single piece stator unit has said salient poles on the two surfaces opposing the adjacent movers, when the salient poles on the single piece stator unit and the salient poles on the stators opposing the single piece stator unit are aligned in phase, the permanent magnets arranged on the two surfaces of the mover blocks opposing the stators have opposite polarities between the two surfaces, and, when the salient poles on the single piece stator unit and the salient poles on the stators opposing the single piece stator unit are shifted out of phase, the permanent magnets arranged on the two surfaces of the mover blocks opposing the stators have the same polarities on the two surfaces.