Performance Investigation and Power Factor Improvement of a Consequent-Pole Type Bearingless Motor

The authors have developed a five-axis actively positioned bearingless drive system intended for a use as an industrial contamination-free centrifugal pump. It includes 1.2 kW consequent-pole type bearingless motor for torque generation and radial/tilting motion control. The aim of this paper is to investigate the motor performance with a test machine. In addition, a proposed rotor is found to improve power factor of a motor function. Based on the three-dimensional finite element method (3D-FEM) analysis, the effectiveness of the proposed structure has been verified in this paper.