Research on Torque Ripple Minimum Approach of Direct Torque Control System

For the large torque ripple of inductance motor based on direct torque control, especially at a low speed, this paper proposes a new control strategy. On the basis of improving conventional switch table of direct torque control system, a two-hysterics control switch table is established in the strategy in order to decrease torque ripple. The simulation shows that it can get good torque performance.