Patent ID: 8723376
Filing Date: 2014-05-13
Classification: H02K

Abstract:
1. A linear motor comprising: a mover in which a plurality of flat plate permanent magnets at outer surfaces of a cornered tubular inner yoke made of a soft magnetic material comprise first flat plate magnets magnetized from inside of the inner yoke to outside thereof and second flat plate magnets magnetized from the outside of the inner yoke to the inside thereof, the first and second flat plate magnets are alternately arranged at each outer surface of the inner yoke along the axial direction of the inner yoke, and positions of the plurality of flat plate permanent magnets provided at the outer surfaces of the inner yoke are deviated from each other; and an armature in which the armature comprises a first single pole unit made of a soft magnetic material and having a rectangular opening, a yoke portion located outwardly of the opening, and a core portion extended from the yoke portion to the opening, and a second single pole unit made of a soft magnetic material and having a rectangular opening, a yoke portion located outwardly of the opening, and a core portion that is located at a position rotated by 90° from a position of the core portion of the first single pole unit and that is extended from the yoke portion to the opening, the first and second single pole units are alternately stacked, and windings are wound around a plurality of the core portions of the first single pole unit and/or a plurality of the core portions of the second single pole unit, wherein the mover is passed through the opening of the first single pole unit and the opening of the second single pole unit.