Torque and flux direct backstepping control of induction motor

Vector control and direct torque control are two standard control ways of induction motor. In vector control, the orientation of rotor flux is affected by variation of rotor resistance. And in direct torque control, the motor torque has large ripple because of the existing of torque and stator flux hysteresis. Through transformation of induction model, vector control and direct torque control can be synthesized by application of backstepping, which can realize torque and flux direct backstepping. The scheme can not only avoid the effect of rotor resistance to rotor flux orientation, but also reduce effect of hysteresis to torque and flux. At last, simulation is given to prove the effectiveness of the design.