A FIXED STRUCTURE DISCRETE-TIME SLIDING MODE CONTROLLER FOR INDUCTION-MOTOR DRIVES

In this paper, discrete-time sliding mode control is proposed for impl ementing an induction motor drive without varying the system structure . Very simple constant gain reaching control and sliding control are o btained to eliminate the chattering phenomenon and steady state error as well as to achieve robustness and minimized computation. For integr ation of the whole system, a simple field acceleration control algorit hm is also derived to coordinate with the sliding mode control such th at a simple 8 bit microcomputer can be used to implement a high perfor mance induction motor drive.