OPTIMAL WIDE SPEED CONTROL OF INDUCTION MOTOR DRIVE

This paper presents modified version of known criteria ?torque-per-Ampere? for optimal vector control of induction machine. Modified criteria ?torque-per-Ampere-m? enables significantly increasing of the maximum electromagnetic torque in comparison with the known criteria for all speeds of the rotor under the voltage constraint. Analytically proved, that without voltage limits control performances for both criteria are coincide. The optimal power performances for modified criteria are obtained. The block diagram of robust optimal current regulator is represented. The simulations results show that modified criteria provide the maximization of torque-per-Ampere capability in all speeds or rotor.