永磁低速同步电机新型滑模速度控制器设计

Design of Novel Sliding-mode Speed Controller for Permanent Magnet Low-speed Synchronous Motor

针对永磁同步电机(Permanent Magnet Synchronous Motor,PMSM)在低速运转时存在的转速脉动及电磁转矩脉动问题,提出了一种新型滑模速度控制器。为了解决传统等速趋近律存在的缺点,首先设计了一种新型的等速趋近律算法,该方法能够根据系统状态距离平衡点的远近而自适应调整等速趋近律速度。另外,建立了包含参数不确定性及负载扰动的PMSM数学模型,利用滑模变结构控制能够有效地提高系统的鲁棒性和收敛性的优点,设计了一种基于新型趋近律方法的滑模速度控制器,并给出了PMSM控制系统的稳定性证明。结果表明,与常规滑模控制器相比,该算法不仅提高了系统的响应速度,减小了稳态误差,同时也有效地抑制了PMSM的脉动现象。

A novel siding mode speed controller is proposed for permanent magnet synchronous motor （PMSM）, which has vibration problems of the rotate speed and the electromagnetism torque in low speed range First of all, a novel reaching law method is designed to solve the existing problem in the traditional equal-speed reaching law, and the mathematical model of PMSM composed of parameter uncertainty and disturbance is established. Sliding mode variable structure control can effectively improve the robustness and response of the system, based on this, a novel siding mode control （SMC） method based on the proposed reaching law method is designed. Finally, the stability analysis of the scheme is also given. The results show that the arithmetic has the advantages of faster response, less stabilization error compared to the traditional SMC, also the vibration is restrained effectively.