【摘要】 转速估计是永磁同步电机无速度传感器下转速跟踪控制首要解决的问题,因在定子磁通中含有转速信息,给出了一种基于模型参考自适应(MRAS)的定子磁通估计结合龙伯格观测器设计思想构建速度观测器的方法。将观测器输出替代系统不可测状态用于反馈控制器设计,所设计的速度跟踪控制器包括非线性补偿器和PI调节器,保证了闭环系统对转速设定轨迹的有效跟踪。MATLAB/Simulink环境下的系统仿真研究给出了控制方法的有效性验证及与现有结果的比较。更多还原

【Abstract】 For the speed tracking control of permanent magnet synchronous motors(PMSM) without velocity sensors, the primary problem is the availability of the speed estimate. Due to the information of the rotor speed including in the stator flux, a speed observer is constructed by utilizing the flux estimate based on model reference adaptive system(MRAS). Furthermore, the feedback controller is designed by the speed observer output instead of the unmeasurable system state. The designed speed tracking controller, which consists of a nonlinear compensator and a PI regulator, ensures the effective trajectory tracking for the predefined speed of the closed-loop speed control system. The effectiveness validation and the comparison with the existing result are given by the simulation research in MATLAB/Simulink environment.更多还原