A scheme of fuzzy direct torque control for induction machine

In this paper, a novel fuzzy logic direct torque control (FLDTC) scheme combining with space voltage modulation (SVM) technique is presented. Using fuzzy logic technique, the reference space voltage vector can be obtained dynamically in terms of torque error, stator flux error and the angle of stator flux. Compared with conventional direct torque control (DTC), this scheme is easily implemented for induction machine, the ripples of both torque and flux are reduced remarkable, and switching frequency is maintained constant. Simulation results verify the validity of the proposed method.