基于模型预测的PMSM直接转矩控制转矩脉动抑制方法

针对传统直接转矩控制方法转矩脉动大的问题，提出了一种基于预测控制减小转矩脉动的方法。首先对定子磁链矢量扇区进行了更加细致的划分，增加了可选有效电压矢量的数量，进而提高直接转矩控制的自由度。在此基础上，分析了零电压矢量对定子磁链幅值与转矩的影响，将零电压矢量加入到控制过程中，最后通过预测控制方法选择最优电压矢量。仿真结果表明，所提方法可有效降低转矩脉动，转矩脉动最大可降低61%，同时所提方法与传统直接转矩控制方法相比，具有更好的动态响应性能。

Torque Ripple Suppression Method for PMSM Direct Torque Model Predictive Control

A model predictive DTC technique is proposed for PMSM, which reduces the torque ripple in this paper. First, the stator flux vector sector is subdivided, the number of available and effective voltage vectors is increased, then the degree of freedom of direct torque control is improved. Based on this, we analyze the influence of zero voltage vector on the stator flux amplitude and torque . The zero voltage vector is added to the control process. Finally, the optimal voltage vector is selected by predictive control method. Simulation results show that the proposed method can effectively reduce the torque ripple, and the maximum torque ripple can be reduced by 61%. At the same time, compared with the traditional direct torque control method, the proposed method has better dynamic response performance.