PID Controller Tuning using Co-Efficient Diagram method for Indirect Vector Controlled Drive

  • Durgasukumar, G. (Dept. of Electrical and Electronic Engineering, VITS) ;
  • Rama Subba Redddy, T. (Dept. of Electrical and Electronic Engineering, VITS) ;
  • Pakkiraiah, B. (Dept. of Electrical and Electronic Engineering, VFSTR University)
  • Received : 2016.02.23
  • Accepted : 2017.03.12
  • Published : 2017.09.01


Medium voltage control applications due to obtain better output voltage and reduced electro-magnetic interference multi level inverter is used. In closed loop control with inverter, the PI controller does not operate satisfactorily when the operating point changes. This paper presents the performance of Co-Efficient diagram PI controller based indirect vector controlled induction motor drive fed from three-level inverter under different operating conditions (dynamic and steady state). The proposed Co-Efficient diagram PI controller based three level inverter significantly reduces the torque ripple compared to that of conventional PI controller. The performance of the indirect vector controlled induction motor drive has been simulated at different operating conditions. For three-level inverter control, a simplified space vector modulation technique is implemented, which reduces the coordinate transformations complications in the algorithms. The performance parameters, torque ripple contents and THD of induction motor drive with three-level inverter is compared under different operating conditions using CDM-PI and conventional PI controllers.


Co-Efficient Diagram PI controller (CDM-PI);Indirect vector control;Space vector modulation (SVM);Three-level diode clamped inverter;Performance improvement;Torque ripple


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