NDLI: Sensorless vector control of induction motor with stator resistance identification based on augmented error

Content Provider	IEEE Xplore Digital Library
Author	Hamajima, T. Hasegawa, M. Doki, S. Okuma, S.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. Eng., Nagoya Univ., Japan (Hamajima, T.)
Abstract	This paper proposes a speed sensorless vector control system of induction motors which is stable in regenerating region as well as motoring one. In speed sensorless vector controls of induction motors with adaptive observers, the speed identification system becomes unstable for the major part of the regenerating region. Moreover, it is pointed out that the stator resistance variation influences the speed identification. Thus, it is necessary to find an adaptive scheme which can stabilize the identification system in whole region. Although several methods have been proposed to stabilize the identification system, they discuss only on the design of the observer gain. In these cases, the following problems exist.. The design parameter is determined by trial and error. Resulting observer gain tends to violate stability of the observer. The induction motor is assumed to be at steady state. Therefore, the stabilization of the parameter identification should be improved by designs of identification laws. In this paper, to stabilize the identification system of the speed and the stator resistance, the augmented error is introduced, yielding the transfer function of an error system becomes "I". Next, an adaptive scheme for the speed and the stator resistance is proposed which stabilizes the identification system. Furthermore, the proposed adaptive scheme is simplified to reduce the amount of calculation. Finally, effectiveness of the proposed method is shown by experiments.
Sponsorship	Ind. Appl. Soc. IEE Japan & IEEE Ind. Appl. Soc.
Starting Page	504
Ending Page	509
File Size	479185
Page Count	6
File Format	PDF
ISBN	0780371569
DOI	10.1109/PCC.2002.997569
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-04-02
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Machine vector control Induction motors Stators Electric resistance Stability criteria Adaptive systems Error correction Parameter estimation Transfer functions Feedback
Content Type	Text
Resource Type	Article

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