观测器补偿的永磁同步电机电流环多变量滑模控制

针对永磁同步电机电流环的强耦合特性问题,提出一种基于观测器补偿的多变量滑模电流环控制策略.该方法建立一个含有不确定量的电流环控制模型,通过多变量滑模控制实现永磁同步电机的d-q轴电流解耦控制,并获得很好的电流响应性能.针对电机系统的参数摄动、负载扰动等因素,设计一种降阶观测器实现速度扰动补偿方法.同时,构造李雅普诺夫函数从理论上分析了系统稳定性的条件.经过永磁同步电机实验平台验证,与常规PI控制策略相比,本方法可获得更快的电机调速能力,更高的调速稳态精度,同时d-q轴电流响应过渡过程更短且精度更高.

Multivariable sliding mode control for current loop of PMSM with observer

Since there exists the problem of a nonlinear, strong coupling and uncertainties in the current loop control for permanent magnet synchronous motor, a new control method of multivariable sliding mode control with disturbance observer is proposed to regulate the current loop in permanent magnet synchronous motor, based on the control mode with uncertainties. To deal with a strong coupling in d-q phase current loop, a multivariable sliding mode control is designed to obtain a better current response performance.To deal with the system parament uncertainties, an observer is designed to compensate the current loop. Moreover, the system stability is analyized by the Lyapunov function. Finally, the proposed control method is verified by the experimental platform of permanent magnet synchronous motor by compared with the traditional PI method, the speed response and the current loop both have a shorter transient process and a higher stady state error.