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.
[1]Schneider T,Binder A.Design and evaluation of a 60 000 rpm permanent magnet bearingless high speed motor[C]//Proceedings of the 7th International Conference on Power Electronics and Drive Systems.Bangkok,Thailand:Chulalongkorn University,2007:1-8.[2]王其磊,杨逢瑜,杨倩,等.电磁轴承在立式高速泵中的应用[J].排灌机械工程学报,2010,28(1):88-92.Wang Qilei,Yang Fengyu,Yang Qian,et al.Application of electromagnetic bearings in vertical highspeed pump [J].Journal of Drainage and Irrigation Machinery Enginering,2010,28(1):88-92.(in Chinese)[3]Bsch N P,Barletta N.High power bearingless slice motor (3-4 kW) for bearingless canned pumps [C]//Proceedings of the 9th International Symposiumon on Magnetic Bearings.Kentucky,USA:Kentucky University,2004:1466-1471.[4]Bartholet T,Nussbaumer T,Kolar J,et al.Comparative evaluation of poly phase bearingless slice motors for fluidhandling applications[J].IEEE Transactions on Industry Applications,2009,45(5):3820-3822.[5]Amemiya A,Chiba A,David G D,et al.Basic characteristics of a consequentpoletype bearingless motor[J].IEEE Transactions on Magnetics,2005,41(1):82-89.[6]Zhu Huangqiu,Boesch N P,Jiang Jinwen.Design and rea lization of a digital control system for a 4 kW bearingless permanent magnet slice motor[C]//Proceeding of the 8th International Conference on Electrical Machines and Systems.Nanjing:Southeast University,2005:1807-1810.[7]徐龙祥,朱小春,姚凯.片状无轴承磁电机的研究[J].中国电机工程学报,2006,26(6):141-145.Xu Longxiang,Zhu Xiaochun,Yao Kai.Research on bearingless slice PM motor[J].Proceedings of the CSEE, 2006,26(6):141-145.(in Chinese)[8]朱熀秋,孙晓东,孙玉坤.无轴承永磁同步电动机数控系统设计与实现[J].江苏大学学报:自然科学版,2006,27(6):536-540.Zhu Huangqiu,Sun Xiaodong,Sun Yukun.Design and realization of digital control system for bearingless permanent magnettype synchronous motors[J].Journal of Jiangsu University:Natural Science Edition,2006,27(6):536-540.(in Chinese)