抄録
The standard PM type self-bearing motor uses surface permanent magnet across which the control fltix should pass. Hence it has trade-off between the strong bias flux and the control flux. This paper proposes a consequent type axial self-bearing motor. Thick permanent magnets are buried in the part of rotor surface. The control flux passes through the rest surface which has low reluctance. Hence it generates rotating torque and axial levitation force effectively. First, the fundamental principle is introduced how the motor produces the rotating torque and the levitation force. Then the motor is designed using FEM. The motor is levitated successfully. But the stable levitation control is not realized when it generates motoring flux. This is due to the magnetic saturation of the stator. To solve this problem, the motor was redesigned. The redesigned motor and magnetic bearing characteristics confirmed high possibility of the proposed self-bearing motor.
