Patent ID: 6800968
Filing Date: 2004-10-05
Classification: H02K

Abstract:
A linear motor comprising:a secondary side supporter attached with a secondary side consisting of a plurality of magnetic field poles; and an armature element supporter facing the secondary side via clearance and provided with an armature element having a plurality of concentrate-wound armature coils; in which said secondary side and said armature element are disposed facing each other and in parallel in the advancing direction; wherein field poles in said secondary side are disposed in the advancing direction of a mover with adjacent poles differing by a pitch to Pm, and a plurality of armature coils are disposed in an array in the advancing direction of the mover for each of a respective coil pitch equal to Pc the coil pitch being made into Pc=5/3Ã—Pm, and armature coils of said armature element is formed of two layers in which a first coil layer and a second coil layer are laminated in the direction of an air gap, wherein said first coil layer and second coil layer are disposed with a shift of n/6Ã—Pm where n is an integral number excepting a multiple of 3.