基于新型趋近律的双定子电机控制系统研究

Research on Double-Stator Motor Control System Based on Novel Reaching Law

为了提高双定子永磁无刷(DS-PMBL)电机调速系统的动态品质,在纯指数趋近律的基础上,结合终端吸引因子与系统状态变量的幂函数,进而提出一种新型的趋近律,有效抑制了滑模控制抖振,显著提高滑模趋近速度。以该新型趋近律为基础,设计了DS-PMBL电机的数学模型与滑模速度跟踪控制器,采用i_d=0的矢量控制方法确定DS-PMBL电机的动态性能,并与常规指数趋近律进行仿真比较。结果表明,提出的改进控制系统与传统的控制方法相比,提高了滑模趋近速度,减小了抖振,明显地提高了系统的动态特性与鲁棒性。

In order to improve the dynamic quality of double stator permanent magnetic brushless （ DS-PMBL）motor speed servo system, based on the pure exponential reaching law, and combining with the power functionof terminal attraction factor and system state variables, a novel reaching law is proposed, which effectively suppressesthe chattering of sliding mode control and significantly increases the reaching speed of sliding mode.Based on this novel reaching law, the mathematical model and sliding mode speed tracking controller of DSPMBLmotor are designed. The dynamic performance of DS-PMBL motor is determined by vector control with id=0, and compared with the conventional exponential reaching law. The simulation results show that the improvedcontrol system improves the approach speed of sliding mode and reduces the chattering compared withthe traditional control methods, which obviously improves the dynamic characteristics and robustness of the system.