An Extended Speed Adaptive Observer with Auxiliary Variables for Sensorless Induction Motor Low-Speed Operation

This paper proposed an extended speed adaptive observer (ESAO) with auxiliary variables to improve the stability of sensorless induction motor (IM) low-speed operation. The mathematical model of IM is reconstructed by introducing an auxiliary variable. On this basis, an ESAO is designed with a novel...

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Bibliographic Details
Main Authors: Huo, Zhixin, Wang, Bo, Yu, Yong, Wang, Tianqing, Luo, Cheng, Xu, Dianguo
Format: Conference Proceeding
Language:English
Subjects:
ESAO
Induction motor drives
low speed operation
Lyapunov methods
Mathematical model
Observers
sensorless
Sensorless control
Stability
Stability analysis
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Summary:This paper proposed an extended speed adaptive observer (ESAO) with auxiliary variables to improve the stability of sensorless induction motor (IM) low-speed operation. The mathematical model of IM is reconstructed by introducing an auxiliary variable. On this basis, an ESAO is designed with a novel speed adaption law. Compared with the conventional adaptive full-order observer (AFO), the proposed ESAO can reduce the unstable region in low-speed operation without without complex feedback gain design. Experimental results show the effectiveness of the proposed method.
ISSN:2642-5513
DOI:10.1109/ICEMS.2019.8921523