Abstract：Since the bearingless permanent magnet slice motor (BPMSM) can be used to drive a centrifugal pump, a prototype of such a motor was designed based on slice rotor suspension principle, subsequently its operating principle was expounded, eventually the mathematical models for electromagnetic torque and radial suspension force were presented．The hardware of digital control system for the motor was designed by using the TMS320F2812 DSP and the software for the system was developed as well. Then, a humancomputer interaction interface was composed for the control system to make realtime control and online debugging more easily. The experiments on slice rotor suspension and operation were performed. The experimental results show that realtime online debugging through the humancomputer interaction interface can determine controlling parameters quickly and easily to allow the system to achieve the scheduled requirements on control. The speed of slice rotor varies from 0 to 2 000 r/min continuously and can attain a stable speed soon. The rotor center of mass vibrates near the equilibrium position (2 000, 2 000) and the vibration amplitude is less than 80 μm in the radical direction under noload conditions. Thus, the prototype of 4 kW BPMSM used to drive a centrifugal pump and its digital control system has an excellent static and dynamic performance．
朱熀秋, 陈金海, 左文全. 无轴承永磁薄片电动机泵原理及控制系统设计[J]. 排灌机械工程学报, 2012, 30(5): 517-521.
ZHU Huang-Qiu, CHEN Jin-Hai, ZUO Wen-Quan. Principle and control system design for bearingless permanentmagnet slice motor pump. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(5): 517-521.
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