基于MRAS的变参数PI转速辩识研究

Research on Speed Identification of Induction Motors by Variable Parameter PI Based on MRAS

基于电动机转子磁链的模型参考自适应(MRAS)转速辨识算法中,常规定参数PI自适应转速推算方法难以得到令人满意的动态性能和辨识精度,在分析PI转速推算时各参数在调节过程中所起不同作用的基础上,提出了一种新的变参数PI转速辨识算法。理论分析和实验结果表明,利用变参数PI进行转速辨识比定参数PI有优良的动态性能和辨识精度。

For model reference adaptive system(MRAS) of induction motor based on rotor flux,it is difficult to get satisfied dynamic performance and identification precision by using normal fixed parameter PI adaptive speed identification arithmetic.In this paper,after analyzing the effects of various parameters in the variable parameters PI speed identification,a new type of variable parameters PI speed identification arithmetic is proposed.Both the theoretical analysis and the experimented results show that the prop...