Analysis and design of full-order flux observers for sensorless induction motors

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    Abstract

    This paper deals with the flux estimation for sensorless induction motor drives. The linearized model of the speed-adaptive full-order flux observer is applied to help choosing the observer gain and the speed-adaptation gains. It is shown that the linearized model reveals potential instability problems that are difficult to find by other means. An observer gain and a method to vary the speed-adaptation gains in the field-weakening region are proposed. Experimental results show stable operation in a very wide speed range.
    Original languageEnglish
    Pages (from-to)1033-1040
    JournalIEEE Transactions on Industrial Electronics
    Volume51
    Issue number5
    DOIs
    Publication statusPublished - 4 Oct 2004
    MoE publication typeA1 Journal article-refereed

    Keywords

    • flux estimation
    • full-order adaptive observer
    • induction motor drives
    • speed sensorless

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