Asynchronous Motor's DTC System Based on 18-Angular Flux Trace and Its Simulation

The Direct Torque Control (DTC) with round flux trace control has high accuracy and is normally used in low speed. In higher speed area, limited by switching fr equency, 6-angular flux trace control is generally used, but it has high harmoni c components and does harm the system's performance and the power network. To ha ndle this problem, a new method based on invaginated 18-angular flux trace contr ol is presented in this paper, and simulation research is carried out. The resul ts show that this method greatly reduces harmonic components in stator current, and has good application prospects.