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

被引：0
作者：
Zhao X. [1 ]
Wang Z. [1 ]
Yang G. [1 ]
Li C. [1 ]
Kang J. [1 ]
Zhao H. [1 ]
机构：
[1] School of Electrical and Electronic Engineering, North China Electric Power University, Beijing
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2023年 / 27卷 / 10期
关键词：
differential evolution algorithm; induction motor; rotor flux orientation control; rotor time constant identification; stator back electromotive force transient process; voltage waveform curve fitting;
D O I：
10.15938/j.emc.2023.10.004
中图分类号：
学科分类号：
摘要：
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. © 2023 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：34 / 41
页数：7
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