IEEE Transactions on Industry Applications | 2021
Design, Development and Experimental Results of a 30 000 r/min One-Axis Actively Positioned Single-Drive Bearingless Motor
Abstract
This paper proposes a novel design of a six-slot/four-pole one-axis actively positioned single-drive bearingless motor. This new single-drive bearingless motor is proposed by adapting the 4-pole 2-layer of permanent magnet rotor and a wide air-gap length for high rotational speed operation. Input powers of the proposed bearingless motor and a ball bearing motor were measured. The experimental results verified that the proposed bearingless motor can reduce the input power because the magnetic suspension power is less than that in the ball bearing power. As a result, the efficiency of the proposed bearingless motor can be notably enhanced by approximately 17.8 % at 17 000 r/min compared to the ball bearing motor. In addition, a stable magnetic suspension is achieved at 30 000 r/min