Application of self-adjusting fuzzy controller in a vector-controlled induction motor drive

A slip frequency vector-controlled system is not robust because it needs accurate mathematical model of the motor and it traditionally uses the PID method. By applying regular fuzzy control, the system´s robustness can be improved, but the steady-state precision is lowered. This paper introduces a self-adjusting fuzzy speed controller in a slip frequency vector-controlled system. It can not only enhance the robustness of the system, but also improve the steady-state precision and dynamic performance. A simulation example is also presented