基于新型扰动观测器的永磁同步电机滑模控制  

Sliding Mode Control of PMSM Based on a Novel Disturbance Observer

作　　者：刘颖[1] 周波[1] 方斯琛[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市210016

出　　处：《中国电机工程学报》2010年第9期80-85,共6页Proceedings of the CSEE

基　　金：江苏省创新学者攀登计划(BK2009019);江苏省"六大人才高峰"高层次人才项目~~

摘　　要：相对于常规的PI控制方法,滑模变结构控制(sliding-mode variable structure control,SMC)能够有效地提高系统的鲁棒性和快速性,因而被应用于永磁同步电机(permanent magnet synchronous motor,PMSM)的调速系统,但抖振现象的存在限制了其实际应用。在PMSM双闭环调速系统的设计中采用了SMC策略,并引入积分补偿和扰动观测器环节,防止系统产生稳态误差和固有的抖振现象。针对负载变化导致系统转动惯量不同的问题,结合离散模型参考自适应理论,提出一种能够在线辨识系统转动惯量的新型扰动观测器。运用dSPACE实时仿真系统进行实验验证。结果表明,所设计的控制器提高了系统的鲁棒性,具有较好的动、静态特性。Compared with conventional PI control, sliding-mode variable structure control （SMC） can effectively improve system robustness and response, so it has been applied in permanent magnet synchronous motor （PMSM） speed control systems. However, the practical application of SMC is greatly restrained by shuttering. SMC was adopted in the design of a double-loop controller （speed loop and current loop）. Integral compensation and disturbance observer were also introduced to prevent the possible steady-state errors and the intrinsic chattering. Considering that load changes led to different rotational inertia, and referring to model reference adaptive identification theory, a novel disturbance observer capable of adjusting rotational inertia online was proposed. Experiments were carried out with a dSPACE real-time simulation system. Experimental results demonstrate that the designed controller enhances system robustness and ensures good dynamic and static performances.

关 键 词：永磁同步电机 扰动观测器:转动惯量辨识:dSPACE 

分 类 号：TM85[电气工程—高电压与绝缘技术]