基于扩张状态观测器的永磁同步电机PWM电流预测控制

PWM predictive current control of permanent magnet synchronous motor based on extended state observer

针对传统永磁同步电机PWM电流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,提出基于扩张状态观测器的新型PWM电流预测控制算法.分析电机参数扰动偏差对PWM电流预测控制系统的影响,构建相应的扩张状态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,并通过极点配置验证新型算法的稳定性.仿真结果表明,新型算法能够快速无静差地观测系统扰动,有效避免电感参数扰动偏差对电流预测系统的影响.

Since the motor parameter error can cause outputed current static error and oscillation in traditional PWM predictive current control of the permanent magnet synchronous motor（PMSM）, a novel PWM predictive current control algorithm based on extended state observer（ESO） is proposed. The influence of the motor parameter disturbance on the PWM predictive current control system is analyzed. Then, the corresponding ESO is constructed to observe the system disturbance caused by the parameter deviation, the real-time disturbance compensation for the traditional predictive control algorithm is provided, and the stability of the new algorithm is verified by the pole assignment. The simulation results show that, the proposed algorithm can quickly and statically observe the system disturbance, and avoid the influence of the disturbance of the inductive parameter on the current prediction system.