基于区域极点配置理论的定子磁链全阶观测器

Stator Flux Linkage Observer Based on Regional Pole Assignment

以定子电流和定子磁链为状态变量,设计了一个定子磁链观测器。为了克服定、转子电阻和转速变化对观测测性能的不良影响,基于区域极点配置理论,根据实际工程需要构造具有一定自由度观测器的增益矩阵,使得对电机定转子电阻变化、转速变化等不确定性,观测器系统矩阵的极点都被配置到指定的稳定区域内。为了验证方案的有效性,进行了仿真研究,仿真结果表明磁链观测器对电机本身的参数不确定性、负载突变和转速突变都具有较强的鲁棒性。

A stator flux linkage observer,which used stator current and stator flux linkage as state variable,was designed.In order to restrain bad effect of parameter perturbation,a certain degree of freedom observer gain matrix was designed according to regional pole assignment theory and actual demand of engineering.For the uncertainty of motor stator and rotor resistance variation,speed change and other certainties,the observer matrix pole was configured in a specified stability region.Simulation was given to verify the effectiveness of the scheme.The simulation results show that the observer has strong robustness to parameter uncertainty,load variation,and speed change.