Gain design of an adaptive full-order observer using a pole placement technique for speed sensorless induction motor drives

Anno Yoo, Sang Heon Han, Young Ik Son, Young Doo Yoon, Chanook Hong

Research output: Contribution to journalArticle


This paper proposes a design guideline for the feedback gain of the adaptive full-order observer in the speed sensorless control of induction machines. The performance of the adaptive full-order observer is dependent on its feedback gain. This paper presents a pole placement method for the observer feedback gain design to improve the estimation performance of the speed adaptive observer. In the proposed method, the observer poles can be chosen independently of the induction motor poles. Instead, they can be positioned according to the operating speed. An analysis and experimental results obtained with the proposed method reveals better performances under general operating conditions.

Original languageEnglish
Pages (from-to)1346-1354
Number of pages9
JournalJournal of Power Electronics
Issue number4
Publication statusPublished - 2016 Jul 1



  • Adaptive speed observer
  • Full-order observer
  • Induction motor
  • Pole placement
  • Sensorless control

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