Research of Direct Torque Control Based on Increment of Reference Stator Flux

The reference voltage vector based on the increment of stator flux is calculated,which is modulated by space vector modulation(SVM).A simulation model of the novel direct torque control system is set up in the environment of Matlab/Simulink.Simulation results show that this system can effectively reduce the ripple of motor torque and stator flux,especialy at lower speed range.