基于分段终端滑模的双三相电机控制系统研究

Research on Dual Three-phase Motor Control System Based on Segmented Terminal Sliding Mode

为进一步提高双Y移30°永磁同步电机调速系统控制性能,提出一种分段非奇异终端滑模控制方法。详细阐述分段非奇异终端滑模相比于非奇异快速终端滑模的优异性,分析了分段非奇异终端滑模面参数的意义,理论证明系统状态从到达滑模面至收敛到平衡点的作用时间是有限的。在此基础上设计双Y移30°永磁同步电机调速控制器,在保持系统动态性能的同时,减小超调量,提高了稳态精度。仿真和实验结果证明了方法的有效性。

In order to optimize the drive control performance of dual Y shift 30 degrees permanent magnet synchronous reluctance motor,a novel model-free predictive current control strategy for synchronous reluctance motor was designed. The main advantage of model-free predictive current control over conventional model predictive current control was that it did not require the use of a specific motor model,did not rely on motor parameters,and did not require back-EMF estimation. At the same time,the new model-free predictive current control scheme was designed to avoid the problem of current spikes caused by two current measurements in each sampling period and the current variation update stagnation to reduce the prediction performance. The new solution is simple and easy to realize,and no need to use pulse width modulation. Finally,the comparison test results verify that the new control strategy has better control performance.