Effect of induction motor parameter variations on digital computation of transient starting currents and torques

The starting behavior of induction motors and the application of a simulation technique for the prediction of the starting current and torque when switching and reswitching the motor to the supply are addressed. The sensitivity of the starting current and torque to parameter variations is studied. The investigation is performed for different power ratings and design classes. Concurrently practical laboratory measurements are carried out to examine the parameter variations during the staring period. A practical motor model that gives satisfactory results is suggested. Results from simulations performed with this model are shown.<>