根据αβ坐标系统的永磁同步电机数学模型,利用MATLAB/Simulink 仿真工具,搭建了传统直接转矩控制系统仿真模型。针对系统磁通与转矩的输出波动大的特点,基于超螺旋滑模变结构控制策略,在dq坐标系下,设计了磁链与转矩控制器,继而搭建仿真模型。在新的模型下,用转矩控制器与磁链控制器替换滞环比较器,得出了改进系统的电磁转矩与电机转速的响应曲线。通过对比传统直接转矩控制系统的曲线,结果表明改进后的系统电磁转矩曲线脉动显著减小,转速响应明显加快。

According to the mathematical model of the permanent magnet synchronous motor based on the αβcoordinate system, the traditional direct torque control system simulation model was built by using the Simulink stool in MATLAB. According to characteristics of the system of magnetic flux and torque output fluctuations, supertwisting synovial variable structure control strategy based on, in the dqcoordinate system design flux and torque controller, then built the simulation model, in the new model, hysteresis comparator was replaced by torque controller and flux linkage controller, it was concluded that the improved system of electromagnetic torque and motor speed of response curve. By comparing the curve of the traditional direct torque control system, the results showed that the electromagnetic torque curve of the improved system was significantly reduced, and the speed response was obviously accelerated.

TM 351

国家自然科学基金资助项目(51479018,51379002)