Abstract：This paper proposes a novel unbalance compensation control scheme based on feed-forward control to eliminate unbalance effects which adversely affect the operation of bearingless induction motors. First,the principle of rotor vibration caused by mass imbalance of bearingless induction motors is analyzed. And the dynamic model of the rotor is deduced,in which the PID control in the radial displacement loop can’t cancel the effect of unbalance. Then,an unbalance compensation technique based on feed-forward control is presented to reduce the vibration of the suspended rotor caused by mass imbalance. Finally,the platform of a bearingless induction motor is established and the experimental results demonstrate the effectiveness of the proposed unbalance compensation control scheme based on feed-forward control.
[1] 孙晓东,陈龙,杨泽斌,等. 考虑偏心及绕组耦合的无轴承永磁同步电机建模[J]. 电工技术学报,2013,28(3): 63-70. Sun Xiaodong,Chen long,Yang Zebin,et al. Modeling of a bearingless permanent magnet synchronous motor considering rotor eccentricity and coupling relationship of windings[J]. Transactions of China Electrotechnical Society,2013,28(3): 63-70. [2] 孙晓东,朱熀秋. 基于神经网络逆系统理论无轴承异步电动机解耦控制[J]. 电工技术学报,2010,25(1): 43-49. Sun Xiaodong,Zhu Huangqiu. Decoupling control of bearingless induction motors based on neural network inverse system method[J]. Transactions of China Electrotechnical Society,2010,25(1): 43-49. [3] 邓智泉,严仰光. 无轴承交流电动机的基本理论和研究现状[J]. 电工技术学报,2000,15(2): 29-35. Deng Zhiquan,Yan Yangguang. The main theory and status quo of AC bearingless motors[J]. Transactions of China Electrotechnical Society,2000,15(2): 29-35. [4] 王凤翔,郑柒拾,王宝国. 不同转子结构无轴承电动机的磁悬浮力分析与计算[J]. 电工技术学报,2000,15(5): 6-9. Wang Fengxiang,Zheng Qishi,Wang Baoguo. Analysis and calculation of magnetic levitation forces for bearingless motors with different rotor structure[J]. Transactions of China Electrotechnical Society,2000,15(5): 6-9. [5] Shi J,Zmood R,Qin L. Synchronous disturbance attenuation in magnetic bearing systems using adaptive compensation signals[J]. Control Engineering Practice,2004,12(3): 283-290. [6] Bi C,Wu D Z,Jiang Q,et al. Optimize control current in magnetic bearings using automatic learning control [C]. Proceedings of IEEE International Conference on Mechatronics,Istanbul,Turkey,2004: 305-310. [7] Kuseyri I S. Robust control and unbalance compensation of rotor/active magnetic bearing systems[J]. Journal of Vibration and Control,2012,18(6): 817-832. [8] Li L,Shinshi T,Iijima C,et al. Compensation of rotor imbalance for precision rotation of a planar magnetic bearing rotor[J]. Precision Engineering,2003,27(2): 140-150. [9] Lum K Y,Coppola V T,Bernstein D S. Adaptive autocentering control for an active magnetic bearing supporting a rotor with unknown mass imbalance[J]. IEEE Transactions on Control System Technology,1996,4(5): 587-597. [10] Tang L,Chen Y Q. Model development and adaptive imbalance vibration control of magnetic suspended system[J]. Acta Astronautica,2009,65(9-10): 1506- 1514. [11] Hector G C,Pablo S M. Unbalance compensation for active magnetic bearings using ILC[C]. Proceedings of the IEEE International Conference on Control Applications,Mexico,2001: 58-63. [12] Herzog R,Buhler P,Gahler C,et al. Unbalance compensation using generalized notch filters in the multivariable feedback of magnetic bearings[J]. IEEE Transactions on Control System Technology,1996,4(5): 580-586. [13] Setiewan J D,Mukherjee R,Maslen E H. Synchronous sensor runout and unbalance compensation in active magnetic bearings using bias current excitation[J]. Journal of Dynamic Systems,Measurement and Control,2002,124(1): 14-24. [14] 张涛,倪伟,叶小婷. 基于电流最小的无轴承永磁电机转子质量不平衡补偿控制[C]. Proceedings of the 27th Chinese Control Conference,Kunming,China,2008: 164-168. [15] 张涛,朱熀秋. 无轴承永磁同步电机转子质量不平衡补偿控制[J]. 中国电机工程学报,2007,27(15): 33-37. Zhang Tao,Zhu Huangqiu. Rotor’s mass unbalance compensation control in bearingless permanent magnet- type synchronous motors[J]. Proceedings of the CSEE,2007,27(15): 33-37. [16] 张倩影,邓智泉,杨艳. 无轴承开关磁阻电机转子质量偏心补偿控制[J]. 中国电机工程学报,2011,31(21): 128-134. Zhang Qianying,Deng Zhiquan,Yang Yan. Compensa- tion control of rotor mass eccentric in bearingless switched reluctance motors[J]. Proceedings of the CSEE,2011,31(21): 128-134. [17] 卜文绍. 无轴承电机通用磁悬浮模型及解耦控制系统研究[D]. 武汉: 华中科技大学,2007. [18] Chiba A,Fukao T,Ichikawa O,et al. Magnetic bearings and bearingless drives[M]. Boston: Newnes Elsevier,2005. [19] Nornura S,Chiba A,Nakamura F,et al. A radial position control of induction type bearingless motor considering phase delay caused by the rotor squirrel cage[C]. Power Conversion Conference,Yokohama,Japan,1993: 438-443. [20] Bu W S,Xiao J Y,Yuan L,et al. Induction compensa- tion control of bearingless induction motor[C]. Proceedings of the IEEE International Conference on Mechatronics and Automation,Beijing,China,2011: 944-949.
2014, Vol. 29 
