Hybrid AMB Type Selfbearing Motor

A new type of selfbearing motor is introduced in this paper. It is intended for a rotor to have two functions of rotary motor and radial magnetic bearing. Previously developed selfbearing motor uses P±2 pole algorithm which has the demerits of complicated control and low maximum power. This paper introduces a hybrid active magnetic bearing (HB AMB) type selfbearing motor which uses DC magnetic flux to control radial forces and is similar to HB type active magnetic bearing. First, principle and theoretical background is introduced. Then the minimum pole number is theoretically derived which guarantees the control independency of rotation and levitation. Finally, the experimental setup is made to confirm the capability of the proposed motor. The results show high possibility of the proposed motor.