This paper concerns the study of a direct torque control based on fuzzy logic type-2 for the speed regulation of a doubly star Induction Machine fed by voltage source inverter. This command has become one of the high performance control strategies for AC machine to supply a very rapid torque and flux control. The proposed technique consists to change the proportional and integral controllers by type-2 fuzzy logic controller. The performance of the scheme in different operating conditions is studied. Particular interest is given to the robustness of the fuzzy logic based control. Furthermore, the simulation results illustrate the efficiency and robustness of the type-2 fuzzy logic controller.

The aim of this article is to improve the performance of the classical direct torque control (DTC) of doubly star induction motor (DSIM) drive by reducing the ripples level in electromagnetic torque and stator flux. For this reason, we present different strategies to enhance the performance of DTC such as DTC_SVPWM. This technique replaces hysteresis controllers by two (PI) controllers to generate the direct and the quadrature voltage components in d-q frame. However it is difficult to adjust the parameters of PI controller due to the complexity of the control system. The self-tuning PI fuzzy controller was proposed to adjust the PI parameters in this paper. Simulation is carried out using MATLAB/SIMULINK and the performance of the proposed fuzzy system is analyses. The simulation results show that the proposed method can significantly reduce the torque ripple and is suitable for various motor at different working state.