Patent ID: 8466587

Claim:
A linear motor having an armature and a displacer, wherein said armature includes a plurality of magnetic poles and a plurality of windings, said displacer includes a plurality of permanent magnets, said armature and said displacer being relatively displaceable to each other, said magnetic poles further comprises: a plurality of magnetic-pole teeth which are oppositely-deployed on both sides of said permanent magnets with clearances placed therebetween; and a plurality of cores for connecting said magnetic-pole teeth to each other, said magnetic-pole teeth being oppositely-deployed with said clearances placed therebetween, wherein said plurality of magnetic poles are provided in a travelling direction of said displacer, and magnetic fluxes generated by said windings deployed on said armature have one and the same polarity in said plurality of magnetic poles, said plurality of oppositely-deployed magnetic-pole teeth being constituted in a stand-alone manner, distance between said magnetic-pole teeth being variable for each of said oppositely-deployed magnetic-pole teeth.