English title

One of the most important control methods in induction motor is direct vector control. This method is based on rotor flux estimation using stator voltage. The machine voltage is low in The voltage model for low speed and voltage drop over the stator resistance is not negligible in front of stator voltage. Thus the stator flux estimation using voltage method is not precise. Some methods are based on estimation of stator resistance to decrease speed error. In this study, we propose a new method by modifying rotor flux. By this way not only drive performance is good in low speed but also the dynamic response became more rapid. In this paper, speed profile has improved. The simulation results by matlab-simulink confirm the new proposed method.