Gain scheduling of a full-order observer for sensorless induction motor drives

Zengcai Qu, Marko Hinkkanen, Lennart Harnefors

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

1 Citation (Scopus)


This paper deals with the design of a speed-adaptive full-order observer for sensorless induction motor (IM) drives. A general stabilizing observer gain matrix, having three free design parameters, is used as a design framework. A gain-scheduled selection of free design parameters is proposed. Furthermore, the full-order observer is augmented with the stator-resistance adaptation, and the local stability of the augmented observer is analyzed. The performance of the proposed full-order observer design is experimentally compared with a reduced-order observer using a 2.2-kW IM drive.
Original languageEnglish
Title of host publicationIEEE International Symposium on Sensorless Control for Electrical Drives and Predictive Control of Electrical Drives and Power Electronics (SLED/PRECEDE 2013)
Place of PublicationMunich, Germany
Number of pages8
Publication statusPublished - 17 Oct 2013
MoE publication typeA4 Article in a conference publication


  • flux estimation
  • full-order observer
  • induction motor
  • resistance adaptation
  • sensorless
  • stability


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