【摘要】 针对传统的异步电动机直接转矩控制中存在低速运行时电动机转矩脉动较大的问题,提出了一种基于模糊控制的直接转矩控制系统模型.该模型采用三输入单输出的结构,将磁链相位角、磁链幅值误差和转矩误差作为模糊变量,并对其进行模糊分级,以此达到优化空间电压矢量选择的目的.并在Matlab/simulink中进行仿真,结果表明该方法有效的减小了转矩脉动,同时有更好的速度响应.更多还原

【Abstract】 In the direct torque control of traditional asynchronous motor, there lies a big problem of its ripple when it is running at a low speed. Hence a model is put forward of direct torque control based on fuzzy control.The model adopts the structure of the three inputs and single output with the flux linkage phase angle and flux linkage amplitude error and the torque error as fuzzy variables. Fuzzy classification is also used for them to achieve the goal of optimization of space voltage vector selection. And Matlab/simulink is used in the simulation. The results show that this method effectively reduces the torque ripple, and at the same time a better speed in response can be achieved.更多还原