Reduced-Order Flux Observers With Stator-Resistance Adaptation for Speed-Sensorless Induction Motor Drives

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2010
Major/Subject
Mcode
Degree programme
Language
en
Pages
1173-1183
Series
IEEE Transactions on Power Electronics, Volume 25, Issue 5
Abstract
This paper deals with reduced-order flux observers with stator-resistance adaptation for speed-sensorless induction motor drives. A general analytical solution for the stabilizing observer gain is given. The gain has two free positive parameters (which depend on the operating point), whose selection significantly affects the damping, convergence rate, robustness, and other properties of the observer. The general stability conditions for the stator-resistance adaptation are derived. An observer design is proposed that yields a robust and well-damped system and requires a minimal amount of tuning work. The proposed observer design is experimentally tested using a 45-kW induction motor drive; stable operation at very low speeds under different loading conditions is demonstrated.
Description
Keywords
flux observer, stability conditions, speed sensorless, stator resistance estimation
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Citation
Hinkkanen, Marko & Harnefors, Lennart & Luomi, Jorma. 2010. Reduced-Order Flux Observers With Stator-Resistance Adaptation for Speed-Sensorless Induction Motor Drives. IEEE Transactions on Power Electronics. Volume 25, Issue 5. 1173-1183. ISSN 0885-8993 (printed). DOI: 10.1109/tpel.2009.2039650.