A combined position and stator-resistance observer for salient PMSM drives: design and stability analysis

Marko Hinkkanen, Toni Tuovinen, Lennart Harnefors, Jorma Luomi

Research output: Contribution to journalArticleScientificpeer-review

88 Citations (Scopus)
118 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)601-609
Number of pages9
JournalIEEE Transactions on Power Electronics
Volume27
Issue number2
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

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

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