Parameter coordination of microcomputer controlled CSI fed induction motor drive

This paper describes an improved design of speed and current PI controllers of a microcomputer controlled current source inverter fed induction motor drive for smooth speed control and stable operation. The small perturbation about the steady state operating condition is used to develop the linearized characteristic equation of the system. The D - partition technique is applied in z - domain for finding the probable stable region in parameter plane. Experimental results are also given to confirm the design.