Bearingless motor with noncontact power supply - FEM analysis of rotation performance -

This paper presents a new type of bearingless motor. A unique feature of this bearingless motor is an operation without the utilization of permanent magnets. The rotor magnetized by a current of a noncontact power supply, which consists of a bridge rectifier circuit and coils. In previously report, the levitation is archived through attractive forces generated by inclinations on the edges of the rotor and the stator. Hence, this paper shows FEM analyses of the levitation and rotation control of a bearingless motor with non-contact power supply. In addition, the design descriptions of a new rotor improvement for achieving the target rotation performance is given.