Linear motor

Abstract

A plurality of permanent magnets are embedded at predetermined pitches τp in a longitudinal direction in a field yoke composed of a magnetic substance so that adjacent magnet poles have opposite polarity, and a plurality of electromagnets, which have magnetic pole pitches τe≈(2n+1)τp of preset intervals provided that n is 0, 1, 2, . . . , which are disposed at predetermined pitches τg=(2s+1/m)τe in the longitudinal direction of the field yoke provided that m is a number of exciting phase and s is 1, 2, 3, . . . , and which are separated from the field yoke by a predetermined gap while opposing to the field yoke, are provided. The field yoke is driven by successively exciting the electromagnets.

Dependencies are inferred from the claim text.