Circular-shaped linear synchronous motor, electromagnetic suspension and motor-driven steering device using the same

The invention provides a high-damping and high-thrust cylindrical linear motor and an electromagnetic suspension and a metor-driven steering device using the same. A stator includes a stator winding and a stator core. A slider includes a slider core and a plurality of permanent magnets. The stator core includes a plurality of stator core magnets comprising a plurality of small magnets on surface of the slider side; two auxiliary poles deployed at both ends of the stator-core salient poles; a yoke units configured to compose a magnetic circuit with the auxiliary pole. The magnetic circuit composed by using the stator core is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.