Space Vector Modulation based Direct Flux and Torque Control Induction Motor drive
Direct flux and torque control (DFTC) is the control mechanism used in ac drives. The standard DFTC drive has hysteresis controllers. DFTC drives with hysteresis controllers are mostly affected by high flux ripple, high ripple content in torque and changeable switching frequency. It is possible to eliminate these problems with the help of space vector modulation (SVM) technique. In the proposed space vector modulation based direct flux and torque control (SVM-DFTC) method space vector modulator is used instead of lookup table or switching table and proportional-integral (PI) controllers are used instead of hysteresis controllers. The drive system performance is analyzed by MATLAB/SIMULINK software.