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JPE, Vol. 19, No. 3, May 2019
Simplified Rotor and Stator Resistance Estimation Method Based on Direct Rotor Flux Identification
Mingyu Wang, Dafang Wang, Guanglin Dong, Hui Wei, Xiu Liang, and Zexu Xu
Area Adjustable Speed Drives
Abstract Since parameter mismatch seriously impacts the efficiency and stability of induction motor drives, it is important to accurately estimate the rotor and stator resistance. This paper introduces a method to directly calculate the rotor flux that is independent of stator and rotor resistance and electrical angle. It is based on obtaining the rotor and stator resistance using the model reference adaptive system (MRAS) method. The method has a lower computation burden and less adaptation time when compared with other rotor resistance estimation methods. This paper builds three coordinate frames to analyze the rotor flux error and rotor resistance error. A number of implementation issues are also considered.
Keyword MRAS,Induction motor,Reactive power,Rotor flux estimation,Rotor resistance,Stator resistance
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