A combined position and stator-resistance observer for salient PMSM drives

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Journal Title

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2012

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Major/Subject

Mcode

Degree programme

Language

en

Pages

9
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.

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Keywords

interior magnet, observer, salient, sensorless,, stability conditions, stator-resistance estimation

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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 , vol. 27 , no. 2 , pp. 601-609 . https://doi.org/10.1109/TPEL.2011.2118232