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 Drive System of Induction Motor

基于先进的内模控制理论,针对感应电动机交-交变频调速系统提出了一种双内模控制结构,并进行了调速系统的控制器设计。所设计的电流控制器为 PI 结构,具有对定子电流交叉耦合电势的动态解耦作用;所设计的磁链和转速控制器为 PID 结构,只有一个可调参数,结构简单,参数调整方便。计算机仿真实验表明,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 drive system of induction motor（IM） based on IMC principle and the current, rotor flux ＆ speed controllers are designed. The PI current controller provides a dynamic decoupling performance for the cross-coupling potential for the stator current, the sensitivity of current loop performance to the changes of IM parameters is reduced; the PID rotor flux ＆ speed 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 dynamic performance than the controllers designed based on＂Engineering Design Methods＂.