Speed estimation of an induction motor drive using an optimized extended Kalman filter

K. L. Shi, T. F. Chan, Y. K. Wong, Siu Lau Ho

Research output: Journal article publicationJournal articleAcademic researchpeer-review

261 Citations (Scopus)


This paper presents a novel method to achieve good performance of an extended Kalman filter (EKF) for speed estimation of an induction motor drive. A real-coded genetic algorithm (GA) is used to optimize the noise covariance and weight matrices of the EKF, thereby ensuring filter stability and accuracy in speed estimation. Simulation studies on a constant V/Hz controller and a field-oriented controller (FOC) under various operating conditions demonstrate the efficacy of the proposed method. The experimental system consists of a prototype digital-signal-processor-based FOC induction motor drive with hardware facilities for acquiring the speed, voltage, and current signals to a PC. Experiments comprising offline GA training and verification phases are presented to validate the performance of the optimized EKF.
Original languageEnglish
Pages (from-to)124-133
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number1
Publication statusPublished - 1 Feb 2002


  • Genetic algorithm
  • Induction motor
  • Kalman filter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation


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