针对永磁同步电机(PMSM)空间矢量的直接转矩控制方案超调频繁、响应时间慢等问题,将传统的转速PI控制器和转矩PI控制器替换成Supertwisting滑模控制器,并从理论上证明了Supertwisting滑模控制器用在转速环和转矩环上能在有限时间内收敛。借助MATLAB/Simulink仿真软件研究了PMSM的转矩脉动,分析了其动态响应速度。仿真结果表明,在空间矢量直接转矩控制中采用Supertwisting滑模控制器与PI控制器相比有更小的转矩脉动,提高了动态响应速度并且解决了超调频繁的问题。

Permanent magnet synchronous motor (PMSM) had many problems such as frequent overshoot, slow response time and so on when using direct torque control (DTC) scheme based on space vector modulation. The traditional speed PI controller and torque PI controller were replaced with the supertwisting sliding mode controller and it was proved that the supertwisting sliding mode controller used in speed loop and torque loop could converge in finite time theoretically. The torque ripple and dynamic response speed of PMSM was studied by MATLAB/Simulink simulation software. The simulation results showed that the supertwisting sliding mode controller and PI controller in DTC of space vector compared with smaller torque ripple, high dynamic response speed and solves the problem of frequent overshoot.

TM 301.2