Novel full-order flux observer structure for speed sensorless induction motors

Marko Hinkkanen, Jorma Luomi

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


    This paper deals with the flux estimation for sensorless induction motor drives. A new full-order observer structure, which uses the stator and rotor fluxes as state variables in their respective reference frames, is proposed. The stator flux state equation is simulated in the stator reference frame, whereas the rotor flux equation is simulated in the rotor reference frame. This natural combination of reference frames gives well-behaving observer poles in the whole speed region, even without feedback terms. The simple Forward Euler discretization can thus be used. Furthermore, existing adaptation rules can be directly adopted for this structure.
    Original languageEnglish
    Title of host publicationThe 27th Annual Conference of the IEEE Industrial Electronics Society (IECON'01)
    Place of PublicationDenver, CO, USA
    Publication statusPublished - 29 Nov 2001
    MoE publication typeA4 Article in a conference publication


    • induction machines, motor drives, flux estimation


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