Parameter sensitivity of full-order flux observes for induction motors

Marko Hinkkanen, Jorma Luomi

    Research output: Contribution to journalArticleScientificpeer-review

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    This paper deals with flux estimation for induction motor drives. The equations of the parameter sensitivity of both the rotor flux estimation and the torque production are derived for a full-order flux observer. Based on the parameter sensitivity analysis, practical methods of designing robust observer gains combining the current model and the voltage model are proposed. The proposed gains are easy to tune and lead to a simple observer structure. Experimental results show that for inaccurate parameter estimates, both the steady-state and dynamic errors in the produced torque are small as compared to the current model. Furthermore, high-speed operation is possible without modeling the magnetic saturation even if motor parameters are highly erroneous.
    Original languageEnglish
    Pages (from-to)1127-1135
    JournalIEEE Transactions on Industry Applications
    Issue number4
    Publication statusPublished - 28 Jul 2003
    MoE publication typeA1 Journal article-refereed


    • full-order flux observer
    • induction motors
    • parameter sensitivity


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