PMSM无权重系数转矩预测控制方法

TORQUE PREDICTIVE CONTROL METHOD FOR PMSM UNWEIGHTED FACTOR

提出一种改进的永磁同步电机(PMSM)无权重系数转矩预测控制方法。首先,在静止坐标系上设计PMSM的转矩预测控制方法,避免了大量的坐标变换运算,极大简化了预测过程。其次,为消除权重系数,提出一种将转矩控制误差和磁链控制误差转化为标幺值的方法,并基于转化后的标幺值提出一种新的目标函数设计方法。因转化后的转矩和磁链控制误差标幺值为同一个数量级,因此无需再设计权重系数。最后,通过实验对比研究PMSM的常规预测转矩控制方法和该文所提方法的动稳态性能。实验结果验证了该文所提方法的有效性。

An improved predictive torque control method for permanent magnet synchronous motor(PMSM)without weight factor is proposed in this paper. Firstly, the predictive torque control method for PMSM is designed on the stationary frame. So, a large number of coordinate transformation operations are avoided and the prediction process is greatly simplified. Secondly, to remove the weight factor, a method to transform the torque control error and the flux control error to per-unit values is proposed. Then, based on the transformed perunit values, a new cost function design method is presented. As the transformed per-unit values of the torque and flux control errors are the same order of magnitude, the weight factor is not required any more. Finally, experimental studies are carried out to compare the dynamic and static control performance of the conventional and the proposed predictive torque control method for PMSM. The experimental results verify the validity of the proposed method.