Soheil Dolatabadi - Faculty of Electrical and Computer Engineering University Of Tabriz Tabriz, Iran
Mohammad Bagher Bannae Sharifian - Faculty of Electrical and Computer Engineering University Of Tabriz Tabriz, Iran

increasing use of electrical machine in precision applications and demands for fast and accurate drives caused experts start to optimized different parts of drive. One of these parts that attract more attentions in past years and have a tremendous impact on operation parameters in electricalmachine and specific speed parameters is drive controller. In this paper we tried to present a new Self-tuning PI that improves speed parameters like: rising time, settling time, steady state error and stability with load variation. Simulation in Matlab/Simulink confirms this method of control.

speed control ;hybrid step motor;adaptive control