永磁同步电机偏差解耦控制策略研究

永磁同步电机在运行过程中存在参数变化、突加负载等时变性干扰,影响了偏差解耦控制策略的动态解耦效果。为了改善偏差解耦控制策略的动态解耦效果,采用一种带干扰观测器的偏差解耦控制策略,该策略将d,q轴间的耦合电流和电感参数变化引起的电压误差视为系统扰动,利用干扰观测器对其进行估计,并将观测值作为补偿量反馈到电压输入端以减弱扰动对系统的影响,实现电流环的精确控制。理论分析和实验结果表明,引入了干扰观测器的偏差解耦控制策略提高了系统的动态解耦效果与鲁棒性。

Study on Deviation Decoupling Control Strategy of Permanent Magnet Synchronous Motor

There are time-varying disturbances such as parameter changes and sudden load in the operation of permanent magnet synchronous motor,which affect the dynamic decoupling effect of the deviation decoupling control strategy.In order to improve the dynamic decoupling effect of the deviation decoupling control strategy,a deviation decoupling control strategy with disturbance observer was adopted.The voltage error caused by the coupling current and the inductance parameter change between the axes was regarded as the system disturbance,which was estimated by the disturbance observer,and the observation value was fed back to the voltage input terminal as the compensation amount to reduce the influence of the disturbance on the system,and the precise control of current loop was realized.Theoretical analysis and experimental results show that the bias decoupling control strategy introduced by the disturbance observer improves the dynamic decoupling effect and robustness of the system.