High performance direct torque and flux control of induction motor drive using fuzzy logic based speed controller

In this research study, direct torque and flux control of induction motor drive (IMD) using fuzzy logic control (FLC) based speed control loop (SCL) is proposed to minimize the ripple contents of stator current, flux and torque and also improve the speed response under transient and steady state operating conditions. It is quite difficult to optimize the high performance of an IMD using conventional PI-controller, because of the nonlinear model of induction motor drive. The PI-controller are requires accurate and continuous tuning of gain values. Therefore, the FLC technique is proposed to improve the system performance. The detailed simulation results are presented in forward and reversal motoring under 1200rpm with no-load, load and sudden change in speed operating conditions using MATLAB/Simulink software to support the feasibility of the proposed control strategy.