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- Title
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.
- Authors
赵旭阳; 王梓旭; 杨广亮; 李朝眩; 康锦萍; 赵海森
- Abstract
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.
- Subjects
ELECTROMOTIVE force; DIFFERENTIAL evolution; INDUCTION motors; CURVE fitting; STATORS
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2023, Vol 27, Issue 10, p34
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938/j.emc.2023.10.004