感应电动机交-交变频调速系统的双内模控制研究

Research of Double Internal Model Control for Cycloconverter-fed Adjustable Speed Drive System of Induction Motor

基于先进的内模控制理论,提出了一种双内模控制结构,将内模控制拓展应用到多环控制的感应电动机交-交变频调速系统的外环;仿照调速系统调节器的工程设计方法,提出了基于内模控制原理的调速系统调节器设计原则,并进行了调节器设计。所设计的电流调节器为PI结构、磁链和转速调节器为PI或PID结构,但都只有一个可调参数,结构简单,参数调整方便。仿真实验表明,采用内模控制后,系统的输出动态性能优于工程设计方法设计的动态性能。

A double internal model control (IMC) structure is proposed for cycloconverter-fed adjustable speed drive system of induction motors (IM). IMC is applied to the rotor flux & speed loop of cycloconverter-fed adjustable speed drive system. With the help of engineering design method, the IMC design method based on IMC principle is presented, the current, rotor flux & speed controllers are designed. The stucture of current controller is PI, rotor flux & speed controllers are PI or PID, but the controllers have only one adjustable parameter that is directly related to system performance, the structure of controllers is simple. Theoretical analysis and simulation results show that the designed controllers based on IMC principle have better performance than the controllers designed based on engineering design method.