Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Comparative Analysis of Integer-order and Fractional-order Proportional Integral Speed Controllers for Induction Motor Drive Systems

  • Khurram, Adil (Department of Electrical Engineering, American University of Sharjah) ;
  • Rehman, Habibur (Department of Electrical Engineering, American University of Sharjah) ;
  • Mukhopadhyay, Shayok (Department of Electrical Engineering, American University of Sharjah) ;
  • Ali, Daniyal (Department of Electrical Engineering, American University of Sharjah)
  • Received : 2017.03.12
  • Accepted : 2018.01.08
  • Published : 2018.05.20
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Abstract

Linear proportional-integral (PI) controllers are an attractive choice for controlling the speed of induction machines because of their simplicity and ease of implementation. Fractional-order PI (FO-PI) controllers, however, perform better than PI controllers because of their nonlinear nature and the underlying iso-damping property of fractional-order operators. In this work, an FO-PI controller based on the proposed first-order plus dead-time induction motor model and integer-order (IO) controllers, such as Ziegler-Nichols PI, Cohen-Coon PI, and a PI controller tuned via trial-and-error method, is designed. Simulation and experimental investigation on an indirect field-oriented induction motor drive system proves that the proposed FO-PI controller has better speed tracking, lesser settling time, better disturbance rejection, and lower speed tracking error compared with linear IO-PI controllers. Our experimental study also validates that the FO-PI controller maximizes the torque per ampere output of the induction machine and can effectively control the motor at low speed, in field-weakening regions, and under detuned conditions.

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References

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