Stabilization of regenerating-mode operation in sensorless induction motor drives by full-order flux observer design

Marko Hinkkanen, Jorma Luomi

    Research output: Contribution to journalArticleScientificpeer-review

    111 Citations (Scopus)
    121 Downloads (Pure)

    Abstract

    This paper deals with the full-order flux observer design for speed-sensorless induction motor drives. An unstable region encountered in the regenerating mode at low speeds is well known. To remedy the problem, a modified speed-adaptation law is proposed. Instead of using only the current estimation error perpendicular to the estimated flux, the parallel component is also exploited in the regenerating mode. Using current estimation error loci in steady state, a linearized model, simulations, and experiments, it is shown that the observer using the proposed speed-adaptation law does not have the unstable region. It is also shown that the effect of erroneous parameter estimates on the accuracy of the observer is comparatively small.
    Original languageEnglish
    Pages (from-to)1318-1328
    JournalIEEE Transactions on Industrial Electronics
    Volume51
    Issue number6
    DOIs
    Publication statusPublished - 22 Nov 2004
    MoE publication typeA1 Journal article-refereed

    Keywords

    • full-order flux observer
    • induction motor drives
    • speed sensorless
    • stability analysis

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