Abstract
In this paper, a novel 12/10 stator/rotor pole bearingless flux-switching permanent magnet (BFSPM) motor is proposed to overcome the drawbacks of rotor permanent magnet type bearingless motors. The basic motor configuration, including motor configuration and winding configuration, is introduced firstly. Then, based on the principle of reverse direction magnetization for symmetrical rotor teeth, the radial suspension forces generation principle is analyzed in detail. Finally, decoupling performances between suspension force windings and torque windings are investigated. The results show that the proposed BFSPM not only ensures the merits of high torque output capability compared with conventional 12/10 stator/rotor pole FSPM motor, but also achieves stable radial suspension forces which have little mutual effect with torque. The validity of the proposed structure has been verified by finite element analysis (FEA).
Highlights
The bearingless flux-switching permanent magnet (BFSPM) motor combines the characteristics of conventional FSPM motor and bearingless motor, which has the virtues of large torque capability, high radial suspension forces, simple rotor structure, strong robustness, easy thermal dissipation, etc
The results show that the proposed BFSPM ensures the merits of high torque output capability compared with conventional 12/10 stator/rotor pole FSPM motor, but it achieves a nice aCorresponding author: Chenyin Zhao (Electronic mail: 350745234@qq.com)
A novel BFSPM motor which has the merits of high torque output capability and a nice decoupling performance is proposed
Summary
The BFSPM motor combines the characteristics of conventional FSPM motor and bearingless motor, which has the virtues of large torque capability, high radial suspension forces, simple rotor structure, strong robustness, easy thermal dissipation, etc. This magnet-free rotor is favorable in application which requires frequent rotor disposal such as pumping of high-purity fluids, e.g. blood during medical operations.[1]. An apparent decrease of torque output capability and increase of the ripples of torque and radial suspension forces are indispensable due to the alternate pole wound winding configuration selected in this structure. Decoupling performance, the mutual effects between torque and radial suspension forces can be almost ignored
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