Patent ID: 6548920
Filing Date: 2003-04-15
Classification: H02K

Abstract:
A linear motor including an armature and an element having a magnet,wherein said armature or said element having a magnet is movable, and said armature has a coil, first and second magnetic pole teeth are magnetically coupled to one magnetic pole of said armature and disposed in first and second stages, respectively, which are vertically arranged with respect to a moving direction of said armature or said element having a magnet, third and fourth magnetic pole teeth are magnetically coupled to an other magnetic pole of said armature and disposed in said first and second stages respectively, said first and second magnetic pole teeth are disposed alternately along the moving direction of said armature or said element having a magnet, said third and fourth magnetic pole teeth are disposed alternately along the moving direction of said armature or said element having a magnet, and said first and fourth magnetic pole teeth are disposed so as to substantially oppose one another, and said second and third magnetic pole teeth are disposed so as to substantially oppose one another.