Abstract Because of the double-salient-pole structure of Bearingless Switched Reluctance Motors (BSRMs), the problem of large torque ripple and radial-force ripple will be brought when using the conventional control method. In order to solve this problem, a direct instantaneous torque control and direct force control (DITC&DFC) method is proposed in this paper. By the way of torque hysteresis control and selecting equivalent voltage symbols, the proposed method can directly control torque and levitation forces at the same time. In addition, the current hysteresis control loop is removed, which simplifies the control algorithm together with the improvement on the control performance. The levitation mechanism and the principle of the proposed method are demonstrated in detail based on a 12/8 single-winding BSRM. Based on the Matlab/Simulink simulation and the test rig established in laboratory, the feasibility of the proposed control method has been verified according to the simulation and experimental results.
Zhou Jingxing,Cao Xin,Deng Zhiquan等. A Novel Control Method for Single-Winding Bearingless Switched Reluctance Motor to Reduce Torque Ripple and Radial Force Ripple[J]. Transactions of China Electrotechnical Society, 2018, 33(3): 634-641.
[1] Takemoto M, Suzuki H, Chiba A, et al.Improved analysis of a bearingless switched reluctance motor[J]. IEEE Transactions on Industry Applications, 2001, 37(1): 26-34. [2] Takemoto M, Chiba A, Akagi H, et al.Radial force and torque of a bearingless switched reluctance motor operating in a region of magnetic saturation[J]. IEEE Transactions on Industry Applications, 2002, 1(1): 103-112. [3] 邓智泉, 杨钢, 张媛, 等. 一种新型的无轴承开关磁阻电机数学模型[J]. 中国电机工程学报, 2005, 25(9):139-146. Deng Zhiquan, Yang Gang, Zhang Yuan, et al.An innovative mathematical model for a bearingless switched reluctance motor[J]. Proceedings of the CSEE, 2005, 25(9): 139-146. [4] Cao Xin, Deng Zhiquan, Yang Gang, et al.Independent control of average torque and radial force in bearingless switched-reluctance motors with hybrid excitations[J]. IEEE Transactions on Power Electronics, 2009, 24(5):1376-1385. [5] 孙玉坤,刘羡飞,王德明,等.基于有限元分析的磁悬浮开关磁阻电机数学模型的全角度拓展[J].电工技术学报, 2007, 22(9): 34-39. Sun Yukun, Liu Xianfei, Wang Deming, et al.Extension of mathematical model to full angle for bearingless switched reluctance motors based on finite-element analysis[J]. Transactions of China Electrotechnical Society, 2007, 22(9): 34-39. [6] Morrison C R, Siebert M W, Ho E J.Electromagnetic forces in a hybrid magnetic-bearing switched-reluctance motor[J]. IEEE Transactions on Magnetics, 2008, 44(12): 4626-4638. [7] Wang Huijun, Liu Jianfeng, Bao Junfang, et al.A novel bearingless switched reluctance motor with a biased permanent magnet[J]. IEEE Transactions on Industrial Electronics, 2014, 61(12): 6947-6955. [8] Xu Zhenyao, Lee D H, Ahn J W.Comparative analysis of bearingless switched reluctance motors with decoupled suspending force control[J]. IEEE Transactions on Industry Applications, 2012, 51(1): 733-743. [9] Li Chen, Hofmann W.Speed regulation technique of one bearingless 8/6 switched reluctance motor with simpler single winding structure[J]. IEEE Transactions on Industrial Electronics, 2012, 59(6): 2592-2600. [10] 陈杰, 邓智泉, 杨艳. 无轴承开关磁阻电机质量偏心振动补偿[J]. 电工技术学报,2016, 31(18): 13-20. Chen Jie, Deng Zhiquan, Yang Yan.Compensation of mass eccentricity for a bearingless switched reluctance motor[J]. Transactions of China Electrotechnical Society, 2016, 31(18): 13-20. [11] 孙玉坤, 袁野, 黄永红,等. 磁悬浮开关磁阻电机及其关键技术发展综述[J]. 电工技术学报, 2015, 30(22):1-8. Sun Yukun, Yuan Ye, Huang Yonghong, et al.Development of the bearingless switched reluctance motor and its key technologies[J]. Transactions of China Electrotechnical Society, 2015, 30(22):1-8. [12] 孙宇新, 钱忠波. 无轴承异步电动机悬浮子系统独立鲁棒控制方法研究[J]. 电工技术学报, 2016, 31(7):57-64. Sun Yuxin, Qian Zhongbo.Study on independent robust control of levitation subsystem for bearingless induction motors[J]. Transactions of China Electrotechnical Society, 2016, 31(7):57-64. [13] 李生虎,华玉婷,朱婷涵. 无刷双馈异步电机潮流建模和收敛性研究[J]. 电力系统保护与控制,2014, 42(5):90-97. Li Shenghu, Hua Yuting, Zhu Tinghan.Power flow modeling and convergence analysis to brushless doubly-fed induction machines[J]. Power System Protection and Control, 2014, 42(5):90-97. [14] Jinupun P, Luk C K.Direct torque control for sensorless switched reluctance motor drives[C]// 1998 Seventh International Conference on Power Electronics and Variable Speed Drives, London, 1998: 329-334. [15] Cheok A D, Fukuda Y.A new torque and flux control method for switched reluctance motor drives[J]. IEEE Transactions on Power Electronics, 2002, 17(4): 543-557. [16] Inderka RB, De Doncker R W A A. DITC-direct instantaneous torque control of switched reluctance drives[J]. IEEE Transactions on Industry Applications, 2003, 39(4): 1046-1051. [17] 漆汉宏, 张婷婷, 李珍国,等. 基于DITC的开关磁阻电机转矩脉动最小化研究[J]. 电工技术学报, 2007, 22(7):136-140. Qi Hanhong, Zhang Tingting, Li Zhenguo, et al.SRM torque ripple minimization based on direct instantaneoustorque control[J]. Transactions of China ElectrotechnicalSociety, 2007, 22(7):136-140. [18] Mikail R, Husain I, Sozer Y, et al.Torque-ripple minimization of switched reluctance machines through current profiling[J]. IEEE Transactions on Industry Applications, 2011, 49(3): 1258-1267. [19] Vujicic V P.Minimization of torque ripple and copper losses in switched reluctance drive[J]. IEEE Transactions on Power Electronics, 2012, 27(1): 388-399. [20] Wang Mianhua.The fuzzy-PI control of switched reluctance motor based on DTC[C]//International Conference on Measuring Technology and Mechatronics Automation, Zhangjiajie, China, 2009: 606-609. [21] Shi Tingna, Niu Longtao, Li Wenshan, et al.Torque-ripple minimization in switched reluctance motors using sliding mode variable structure control[C]//Proceedings of the 29th Chinese Control Conference, Beijing, 2010:332-337. [22] Sau S, Vandana R, Fernandes B G.A new direct torque control method for switched reluctance motor with high torque/ampere[C]//IECON 2013-39th Annual Conference of the IEEE Industrial Electronics Society, Vienna, 2013: 2518-2523. [23] Cao Xin, Yang Han, Zhang Lei, et al.Compensation strategy of levitation forces for single-winding bearingless switched reluctance motor with one winding total short-circuited[J]. IEEE Transactions on Industrial Electronics, 2016, 63(9): 5534-5349.
2018, Vol. 33 
