Improved Fuzzy Logic Control Strategy ofInduction Machine based on Direct TorqueControl

This paper presents an improved direct torque controlled (DTC) inducion motor drive based on fuzzy logic strategy. The goal of this study is to reduce ripples for both electromagnetic torque and stator flux caused by hysteresis comparators and sector changesin conventional DTC. In the proposed control scheme two fuzzy logic controllers are designed to replace the hysteresis comparators and generate the right module and angle of reference voltage vector, then a PWM strategy is used to deliver the inverter switching states. Simulation results shows the compared performances of fuzzy logic and classical DTC control.

کلیدواژه ها:

Induction motor (IM) ، direct torque control(DTC) ، direct torque fuzzy control (DTFC) ، space vectormodulation (SVM) ، fuzzy inference system (FIS)