International Journal of Control, Automation, and Systems

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Speed and Flux Estimation for an Induction Motor Using a Parameter Estimation Technique

  • Lee Gil-Su (Department of Electrical Engineering, Korea University) ;
  • Lee Dong-Hyun (3rd SD Center, Agency for Defense Development) ;
  • Yoon Tae-Woong (Department of Electrical Engineering, Korea University) ;
  • Lee Kyo-Beum (Institute of Energy Technology, Aalborg University) ;
  • Song Joong-Ho (Department of Electrical Engineering, Seoul National University of Technology) ;
  • Choy Ick (Department of Information Control Engineering, KwangWoon University)
  • Published : 2005.03.01
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Abstract

In this paper, an estimator scheme for the rotor speed and flux of an induction motor is proposed on the basis of a fourth-order electrical model. It is assumed that only the stator currents and voltages are measurable, and that the stator currents are bounded. There are a number of common terms in the motor dynamics, and this is utilized to find a simple error model involving some auxiliary variables. Using this error model, the state estimation problem is converted into a parameter estimation problem assuming that the rotor speed is constant. Some stability properties are given on the basis of Lyapunov analysis. In addition, the rotor resistance, which varies with the motor temperature, can also be estimated within the same framework. The effectiveness of the proposed scheme is demonstrated through computer simulations and experiments.

Keywords

References

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