Stabilization methods for sensorless induction motor drives—A survey

Lennart Harnefors, Marko Hinkkanen

Research output: Contribution to journalReview Articlepeer-review

50 Citations (Scopus)

Abstract

The challenges of achieving stability and good damping of a sensorless induction motor drive are much greater than for a sensored drive. In this paper, some frequently proposed flux and speed estimators-such as reduced- and full-order observers-are reviewed, along with their key static and dynamic properties as well as their parameter sensitivities. Three commonly occurring instability phenomena and their remedies are discussed, along with suitable analysis methods. Low-speed instabilities are most severe, and therefore, the stator resistance is the single most critical parameter. Methods for reducing the impact of this parameter are discussed.
Original languageEnglish
Pages (from-to)132-142
JournalIEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume2
Issue number2
DOIs
Publication statusPublished - 14 Apr 2014
MoE publication typeA2 Review article in a scientific journal

Keywords

  • estimation theory
  • induction motors
  • observers
  • sensorless control
  • stability analysis

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