基于滑模变结构的永磁同步电机直接转矩控制

Direct Torque Control of Permanent Magnet Synchronous Motor Based on Sliding Mode Variable Structure

传统的永磁同步电机直接转矩控制存在较大的磁链和转矩脉动,为解决这一问题,提出一种基于滑模变结构控制方法,用一个一阶滑膜控制器进行转速环调节,用两个基于超螺旋算法的二阶滑膜控制器代替传统直接接转矩控制中的两个滞环比较器,再用电压空间矢量调制的方法,实现对永磁同步电机的直接转矩控制。仿真结果表明,与传统直接转矩控制相比,使用此法提高了系统的鲁棒性和动态响应速度,减小了超调量。

In the direct torque control of conventional permanent magnet synchronous motor, there is a large flux linkage and torque ripple. To solve this problem, this paper proposes a sliding membrane variable structure control method using a first-order slip film controller to perform speed loop adjustment, using two second-order synovial controllers based on super-screw algorithm to replace two hysteresis comparators in traditional direct-connected torque control, and then using voltage space vector modulation method to implement the direct torque control of permanent magnet synchronous motor. The simulation results show that compared with the traditional direct torque control, the method improves the robustness and dynamic response speed of the system, and reduces the overshoot.