基于电流误差加权转速自适应律的异步电机无速度传感器设计方法  

Speed Sensorless Control Design Method for Induction Motor Based on Current Error Weighted Speed Adaptive Law

作　　者：李琰琰 王帅 郭磊磊 靳雪妍 楚之乐 金楠 LI Yanyan;WANG Shuai;GUO Leilei;JIN Xueyan;CHU Zhiyue;JIN Nan(School of Electrical and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]郑州轻工业大学电气信息工程学院,河南郑州450002

出　　处：《智慧电力》2024年第1期95-101,115,共8页Smart Power

基　　金：国家自然科学基金资助项目(U2004166);河南省科技攻关计划项目(232102241026)。

摘　　要：针对异步电机无速度传感器低速运行不稳定的问题,提出一种基于电流误差加权转速自适应律的异步电机无速度传感器设计方法。首先,采用小信号线性化模型分析方法说明转子磁链误差与励磁电流误差之间的关系,进而得出新的转速自适应律;然后,推导所提转速自适应律的开环传递函数,采用劳斯稳定性判据得出系统稳定运行的条件,借助MATLAB软件确定加权系数的取值;最后,将反馈矩阵引入含有改进转速自适应律的系统中,分析所提方法的极点分布规律。实验分析表明,所提方法具有较好的稳定性和优越性。Aiming at the instability problem in the speed sensorless control of induction motor operation at low speed,this paper proposes a speed sensorless control design method for the induction motor based on current error weighted speed adaptive law.Firstly,the small signal linearized model analysis is used to reveal the relationship between rotor flux error and magnetizing current error,thus obtaining a new speed adaptive law.Then the open-loop transfer function of the proposed speed adaptive law is derived,and the conditions for the stable operation of the system are obtained by using the Routh stability criterion.With the help of MATLAB software,the value of a weighting coefficient is obtained.Finally,the feedback matrix is introduced into the system with the improved speed adaptive law to analyze the pole distribution of the proposed method.The experimental analysis shows that the proposed method has better stability and superiority.

关 键 词：异步电机 无速度传感器 改进转速自适应律 自适应全阶观测器 低速稳定性 

分 类 号：TM343[电气工程—电机]