Proposal of a Permanent Magnet Hybrid-type Axial Magnetically Levitated Motor

A permanent magnet hybrid-type axial magnetically levitated motor is proposed in this paper. The motor consists of a spherical permanent magnet and an axial type bearingless motor with a tilt control function. The rotor has two permanent magnets on one side, and the motor stator has eight poles, which include eight concentrated windings. The operating principle was investigated through numerical analysis. It was verified that the proposed motor can control the translational motion, inclinational motion, and rotational motion independently. A test rig was fabricated to investigate the control performance. The time responses of each controlled axes were quick. In addition, stable levitated rotation was observed in each actively controlled axes up to 2000 min(-1).