1988 Volume 1 Issue 1 Pages 34-41
The so-called vector control method is currently used for induction motor drives.This method aims at high speed control of induction motor drives to take place of the d. c. motor in high speed industrial applications. It has not been established, however, whether this method can stabilize the induction motor system in the large, nor is there any discussion about its robustness to the present. This paper proposes a nonlinear feedback control of induction motor drives, where the induction motor is regarded as a bilinear system. The stability of the induction motor system in the large is guaranteed, and this stability is robust against substantial motor constant variation from the nominal value. Simulation results also show that the control method proposed in this paper is superior to the vector control method.