基于级联模糊控制的永磁同步电机直接转矩控制

Direct Torque Control Method of Permanent Magnet Synchronous Motor Based on Cascade Fuzzy Control

针对基于直接转矩控制(direct torque control,DTC)的永磁同步电机(permanent magnetic synchronous motor,PMSM)宽范围调速性能较差的问题,提出了一种基于级联模糊控制的永磁同步电机DTC方法。首先,建立PMSM数学模型,并基于模糊控制构建自适应PI模糊控制器实时调整电机转速;然后构建模糊直接转矩控制调整电机转速和磁链;最后,将速度控制器的输出值作为转矩控制器参考值,构建级联模糊控制器,优化PMSM直接转矩控制,以提升电机性能。仿真结果表明,所提控制方法能够在线自适应调节参数,可实现大范围下的调速稳定。

A direct torque control method(DTC)based on cascade fuzzy control is proposed,to solve the problem of poor speed regulation performance of permanent magnet synchronous motor(PMSM)based on DTC.First,a PMSM mathematical model is established,and an adaptive PI fuzzy controller is constructed based on fuzzy control to adjust the motor speed in real time;then a fuzzy direct torque control is constructed to adjust the motor speed and flux linkage.Finally,the output value of the speed controller is used as the reference value of the torque controller to construct a cascade fuzzy controller to optimize the direct torque control of PMSM,to improve the performance of the motor.The simulation results show that the proposed control method can adaptively adjust parameters online to achieve large-scale speed stability.