基于模糊PI有效磁链直接转矩控制系统的研究

传统永磁同步电机直接转矩控制系统存在磁链和转矩脉动大,在低速状态下难以进行精确控制的问题,而采用PI作为调速系统的控制器又存在对参数适应能力不强的缺陷。因此,为了改善永磁同步电机的性能,采用一种有效磁链滑模算法,以静止坐标系定子电流和有效磁链为状态变量,通过有效磁链推导出定子磁链,将模糊PI控制器代替传统PI控制器,实现对传统直接转矩控制的优化。仿真实验结果表明,该控制方法具有较强的适应性和鲁棒性。

Research on Effective Flux Linkage Direct Torque Control System Based on Fuzzy PI

In view of the flaw of large flux linkage and torque ripple found in the traditional direct torque control system of permanent magnet synchronous motor (PMSM), which makes it difficult to control accurately at low speed, and the defect of weak adaptability of PI controller to parameters, an effective flux sliding mode algorithm is adopted to improve the performance of PMSM. Taking the stator current and effective flux taken as state variables, the stator flux can be derived from the effective flux, with the fuzzy PI controller used to replace the traditional PI controller to optimize the traditional direct torque control. The simulation results show that the proposed control method is characterized with a strong adaptability and robustness.