Speed control of three phase induction motor by pole amplitude
modulation technique is to obtain two, three or four speeds. A control
technique realize a constant torque, constant power and variable torque
operations of this type of motors is presented.This control technique
gives an easy and accurate possibility to perform these processes
without requiring any additional complecated requirements. Some of
the important and interested results verifying the principle of peration
and motor performance characteristics are presented and backed up by
experiments .