A Combined Position and Stator-Resistance Observer for Salient PMSM Drives: Design and Stability Analysis

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
601-609
Series
IEEE Transactions on Power Electronics, Volume 27, Issue 2
Abstract
A reduced-order position observer with stator-resistance adaptation is proposed for motion-sensorless permanent-magnet synchronous motor drives. A general analytical solution for the stabilizing observer gain and stability conditions for the stator-resistance adaptation are derived. Under these conditions, the local stability of the position and stator-resistance estimation is guaranteed at every operating point except the zero frequency, if other motor parameters are known. Furthermore, the effect of inaccurate model parameters on the local stability of the position estimation is studied, and an observer gain design that makes the observer robust is proposed. The proposed observer is experimentally tested using a 2.2-kW motor drive; stable operation at very low speeds under different loading conditions is demonstrated.
Description
Keywords
interior magnet, observer, salient, sensorless, stability conditions, stator-resistance estimation
Other note
Citation
Hinkkanen, M. & Tuovinen, T. & Harnefors, L. & Luomi, J. 2012. A Combined Position and Stator-Resistance Observer for Salient PMSM Drives: Design and Stability Analysis. IEEE Transactions on Power Electronics. Volume 27, Issue 2. 601-609. ISSN 0885-8993 (printed). DOI: 10.1109/tpel.2011.2118232.