Design of first- and second-order sliding mode observers for induction motors using a stator-flux model

Sachit Rao, Vadim Utkin, Martin Buss

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We extend current research in the area of 'sensorless' control of induction motors by presenting two observers based on first- and second-order sliding mode control theories for the simultaneous estimation of flux and speed. We base the observers on the stator-flux model of the motor instead of the usual rotor-flux model mainly because of the uncertain rotor resistance that plays a significant role in the latter. By designing the observers as if they are sliding mode controllers, we lend the properties of parameter insensitive closed-loop dynamics and finite time convergence to the stator flux and speed estimation schemes. We also present simulation and experimental results to validate the operation of the observers.

Original languageEnglish
Pages (from-to)1457-1464
Number of pages8
JournalInternational Journal of Control
Volume83
Issue number7
DOIs
StatePublished - Jul 2010

Keywords

  • induction motors
  • observers
  • sliding mode control
  • stator-flux model
  • super twisting algorithm

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