一种新型的PMSM直接转矩控制

A New Direct Torque Control of PMSM

针对传统永磁同步电动机直接转矩控制系统中存在定子磁链和电磁转矩脉动的缺点,提出了一种改进方法,即用变参数PI速度控制器和模糊控制器分别替代传统直接转矩控制系统中的PI速度调节器和滞环比较器,在此基础上重新建立了永磁同步电机直接转矩控制新的控制框图.利用MATLAB仿真软件对传统永磁同步电机直接转矩控制和改进后的直接转矩控制系统进行了仿真对比研究,实验结果表明,新系统有良好的动、静态性能,减少了转矩和磁链的脉动,能满足控制系统快速响应的要求.

In order to overcome the shortcomings of the stator flux and torque ripple existing in the conventional direct torque control（DTC） system of permanent magnet synchronous motor（PMSM）, this paper put forward an improved method using the variable parameter PI speed controller and fuzzy control- ler respectively to replace PI speed regulator and hysteresis comparator of the conventional DTC. On the basis of this, the new schematic of control strategy for PMSM DTC was rebuilt. The conventional PMSM DTC and the improved DTC system were simulated comparatively. The experiment results show that the improved system has good dynamic and static performance, less flux and torque ripple, and can meet the performance requirements of the control system fast response.