基于定子反电势衰减暂态的感应电机转子时间常数辨识方法  

Identification method of rotor time constant of induction motor based on stator back-EMF decay transient

作　　者：赵旭阳 王梓旭 杨广亮 李朝眩 康锦萍[1] 赵海森[1] ZHAO Xuyang;WANG Zixu;YANG Guangliang;LI Chaoxuan;KANG Jinping;ZHAO Haisen(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《电机与控制学报》2023年第10期34-41,共8页Electric Machines and Control

基　　金：国家自然科学基金(52177041)。

摘　　要：感应电机转子磁链定向控制的动态性能十分依赖转子时间常数的准确性。针对感应电机断电过程中的定子绕组反电势衰减暂态现象,提出一种利用曲线拟合和差分进化算法进行转子时间常数辨识的方法,通过测量定子电压和电流即可完成辨识。在定子反电势衰减过程分析的基础上,推导了不同负载情况、零序分量以及变频供电条件对辨识过程的影响,并对比分析了所提出的两种辨识方法的特点和应用场景。最后以一台22 kW感应电动机为实验对象,开展了定子反电动势波形测量实验,获得了不同工况下的转子时间常数辨识结果。通过与电机参数设计值进行比较验证了定子反电势衰减模型及辨识结果的准确性。研究成果可为感应电机矢量控制中的转子磁链准确定向奠定基础。The dynamic performance of rotor flux oriented control for induction motors heavily depends on the accuracy of the rotor time constant.Aiming at the transient experimental phenomenon of stator winding back electromotive force(back-EMF)attenuation after power is disconnected,this paper proposes a rotor time constant identification method using curve fitting and differential evolution algorithm.The identification can be completed by measuring stator voltage and current.Based on the analysis of the decay process of stator back-EMF,the effects of different load conditions,zero-sequence components,and variable frequency power supply conditions on the identification process were derived,and the characteristics and application scenarios of the two proposed identification methods were compared and analyzed.Finally,with a 22 kW induction motor,experimental validation was also performed to verify the proposed identification method.The accuracy of the stator back electromotive force attenuation model and identification results was verified by comparing with the design values of the motor parameters.The research results lay the foundation for accurate orientation of rotor flux in vector control of induction motors.

关 键 词：感应电机 定子反电势暂态过程 转子磁链定向控制 转子时间常数辨识 电压波形曲线拟合 差分进化算法 

分 类 号：TM343[电气工程—电机]