Direct vector control of induction motors based on independent estimation of resistance and flux

Kang Zhi Liu, Masashi Yokoo, Keiichiro Kondo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


This paper deals with the direct vector control (DVC) of induction motors. It is well known that the estimation of rotor flux plays a fundamental role in the DVC and the estimation precision is significantly affected by the motor resistance. So estimation of resistance is indispensable in practice. For fast estimation of the resistance, it is necessary to slow down the convergence rate of the current estimate. On the other hand, for fast estimation of the rotor flux, it is necessary to speed up its convergence rate. It is very difficult to realize such a trade-off in convergence rates in the full order observer. In this paper, we propose to decouple the current observer from the flux observer so as to realize independent convergence rates. Simulation results of the proposed method show a superior performance in the torque and flux responses.

Original languageEnglish
Title of host publication2015 10th Asian Control Conference
Subtitle of host publicationEmerging Control Techniques for a Sustainable World, ASCC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479978625
Publication statusPublished - 2015 Sept 8
Externally publishedYes
Event10th Asian Control Conference, ASCC 2015 - Kota Kinabalu, Malaysia
Duration: 2015 May 312015 Jun 3


Other10th Asian Control Conference, ASCC 2015
CityKota Kinabalu


  • Current observer
  • Direct vector control
  • Induction motor
  • Parameter adaptation
  • Rotor flux observer

ASJC Scopus subject areas

  • Control and Systems Engineering


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