Patent ID: 6661125
Filing Date: 2003-12-09
Classification: H02K

Abstract:
A linear motor provided with a platen having a platen surface formed with a plurality of platen dots arranged in a matrix and an X-axis movable element having an pole tooth pattern having a set of at least 2n (where n is an integer of 2 or more) pole teeth for generating an advancing magnetic flux with the closest dots among the platen dots,said linear motor characterized in that the platen has the parallel sheet edge surfaces of the stacked member comprised of a plurality of magnetic sheets stacked together as the platen surface, the 2n number of magnetic teeth of the pole tooth pattern are arranged laterally in a relation having an equal spatial phase relation held with the closest dots arranged in the sheet edge direction of the magnetic sheets, the 2n number of pole teeth of the pole tooth pattern are arranged staggered within one dot pitch (P) in the normal direction of the joined surfaces of the magnetic sheets, and the spatial phase held with respect to the closest dot arranged in the normal direction is shifted by increments of the spatial phase difference (P/2n).