基于输入输出反馈线性化的单相异步电机直接转矩控制

Based on input-output feedback linearization of single-phase induction motor direct torque control

为克服单相异步电机直接转矩控制系统中转矩脉动较大等不足,本文提出了基于输入输出反馈线性化的控制方法。首先从单相异步电机的动态数学模型出发,通过引入新的虚拟输入变量详细阐述了输入输出反馈线性化的实线方法,给出了基于输入输出反馈线性化的单相异步电机直接转矩控制系统框图。最后,借助MATLAB/Simulink软件进行了建模与仿真。仿真结果表明,本文提出的控制方法具有良好的磁链收敛性和较小的转矩脉动。

To overcome the disadvantage of bigger torque ripples existed in direct torque control system of single-phase induction motors, this paper proposed a control method based input-output feedback linearization. Starting from the dynamic mathematical model of single-phase induction motors, the implement methods of in-put-output feedback linearization were elaborated by introducing new virtual input variables, and then the con-trol system diagram of direct torque control for single-phase induction motors was provided. Finally, modeling and simulation were performed by MATLAB/Simulink. The simulation results show that the proposed control method has a better flux astringency and lower torque ripples.