基于扩张状态观测器的永磁同步电机无差拍电流预测控制

The Dead-beat Predictive Current Control of Permanent Magnet Synchronous Motor Based on Extended State Observer

针对永磁同步电机预测控制中电机参数扰动偏差造成的输出电流静差及振荡问题,采用基于扩张状态观测器的无差拍电流预测控制算法,构建相应的扰动观测器来观测参数偏差造成的系统扰动,为传统预测控制算法提供实时性扰动补偿。采用有功阻尼概念对转速PI参数进行设计,并针对控制系统的延时进行了补偿。仿真结果表明所提出的算法能够快速无静差地观测系统扰动,有效避免参数扰动偏差对电流预测系统的影响,同时转速环也具有良好的动态性能。

Since motor parameter disturbance could cause current static error and oscillation in predictive current control of permanent magnet synchronous motor(PMSM). Dead-beat predictive current control based on Extended state observer(ESO) was proposed. ESO was constructed to observe the system disturbance for parameter errors and provide real time disturbance compensation for predictive control algorithm. Based on the concept of active damping the speed PI parameter was designed.Besides the delay of the control system was compensated.Simulation results showed that the proposed algorithm could rapidly observe the disturbance of the system without static error,effectively avoid the current static error and oscillation caused by parameter error. At the same time, the rotating speed also had good dynamic performance.