Fuzzy logic is recently getting increasing emphasis in soft control applications. This paper presents an application of fuzzy logic to control the speed of an AC drive system is proposed for space vector pulse width modulated (SVPWM) voltage source inverter-fed induction motor drive. This paper presents the results of an investigation into the suitability of a Direct Torque Fuzzy Control (DTFC) method for an induction motor drive system. Direct torque control is known to produce quick and robust response in AC drive system. However during steady state, torque, flux and current ripple occurs. An improvement of the AC electric dive speed regulation can be obtained using a new DTFC method based on space vector modulation (SVM) which reduces the torque and flux ripples. To validate the proposed method, the simulation has been carried out using MATLAB-SIMULINK. Simulated results presented in this paper shown to have low current distortion, low torque ripple, and a fast torque and speed responses. The simulation results verify the superiority of the proposed method to the conventional DTC method.
Fuzzy logic, Direct Torque Control (DTC), Direct Torque Fuzzy Control (DTFC), Induction Motor (IM), Space Vector Modulation (SVM), switching table
