基于分数阶滑模速度观测器的三电平逆变器驱动PMSM的模型预测电流控制

摘要：

 针对三电平逆变器驱动永磁同步电机系统， 结合分数阶理论和滑模控制理论， 提出基于分数阶速度观测器的模型预测电流控制(MPCC)策略。 与传统的滑模速度观测器相比， 此观测器具有结构简单、易于实现的特点， 且有效消除了在无速度传感器的电机控制系统中运用传统滑模观测器所固有的高频速度抖动现象。 为了减小定子电流脉动、 提高系统控制精度， 提出了系统的MPCC方法。 通过与传统滑模观测器、 滑模参考自适应观测器和滑模变结构观测器相比， 该控制策略能使PMSM MPCC系统具有更好的控制性能、 更强的鲁棒性和良好的动态性能。 仿真结果验证了所提方法的正确性和有效性。

Based on the fractional order theory and sliding mode control theory, a model prediction current control (MPCC) strategy based on fractional observer is proposed for the permanent magnet synchronous motor (PMSM) driven by three-level inverter.Compared with the traditional sliding mode speed observer, the observer is very simple and eases to implement. Moreover, the observer reduces the ripple of the motor speed in high frequency range in an efficient way. To reduce the stator current ripple and improve the control performance of the torque and speed, the MPCC strategy is put forward, which can make PMSM MPCC system have better control performance, stronger robustness and good dynamic performance.The simulation results validate the feasibility and effectiveness of the proposed scheme.