An improved method of direct torque control of induction motor

In view of shortcomings of traditional direct torque control method of induction motor that torque and flux linkage have large pulsation and switching frequency is unfixed, the paper put forward an improved direct torque control method with space vector modulation for induction motor. The method uses torque-angle closed-loop control to achieve decoupling of flux linkage magnitude and phase of stator, so as to obtain reference voltage space vector and realize control of flux error and torque error. The simulation results show that the method can effectively overcome the shortcomings of traditional direct torque control method, and get good dynamic response performance.