Paper Info
Title
Operating-Point Tracking Method for Sensorless Induction Motor Stability Enhancement in Low-Speed Regenerating Mode
Abstract
The stability of adaptive full-order observer (AFO) can be improved by feedback gain tuning and speed adaptive scheme modification for sensorless induction motor (IM) drives in low-speed regenerating mode. However, few research concern this problem with attention to IM operating point changes. To cope with this problem, this paper proposes an operating-point tracking method to design feedback gain and speed adaptive scheme for AFO. Compared with the existing approaches, lower synchronous speed can be accessible during step speed and load changes in low-speed regenerating mode without signal injection. Addressing the operating point changes, the estimated flux error is derived by adapting the projection of estimated current error with respect to speed and torque. The derivative estimated flux error with changing parameters is taken as an additional variable to design feedback gain. Meanwhile, the speed adaptive scheme is modified by the operating-point tracking expression. As a result, the proposed method acquires the capacity to track the operating point in real time. The experimental results on a 2.2-kW IM experimental setup confirm the effectiveness of the proposed method.
Year
DOI
Venue
2020
10.1109/TIE.2019.2914628
IEEE Transactions on Industrial Electronics
Keywords
Field
DocType
Adaptive full-order observer (AFO),induction motor (IM),low-speed regenerating mode,operating-point tracking,sensorless drives
Induction motor,Operating point,Control theory,Engineering
Journal
Volume
Issue
ISSN
67
5
0278-0046
Citations 
PageRank 
References 
0
0.34
0
Authors
6
Name
Order
Citations
PageRank
Cheng Luo100.34
Bo Wang203.04
Yong Yu305.07
Chuang Chen400.34
Zhixin Huo500.34
DianGuo Xu62230.76