CAVAROC, JOHN PETER. Assessment of Stresses on Induction Motors Due to
Momentary Service Interruptions. (Under the direction of Dr. Mesut Baran.)
This dissertation presents an assessment of the worst case stresses produced in an induction
motor when the motor is allowed to ride through a power supply voltage disturbance.
Results from laboratory experiments and computer simulations are shown. The experimental
results are obtained from tests conducted on three squirrel cage induction motors, sized 10
hp, 50 hp, and 75 hp. Each motor is tested with three different load inertias, various motor
loadings, and numerous interruption durations. The computer simulation results are obtained
using a non-linear motor-load model, whose parameters are derived from a non-linear least
squares parameter estimation technique. Experimental data acquired in the lab is used for the
parameter estimation data and for the validation data. Deficiencies in the standard motor-
load model are presented and addressed. Good agreement between the experimental data and
the non-linear motor-load model data is achieved. Results show significant current and
torque transients, but caused no significant damage to the motors or loads used for testing.
(Under the direction of Dr. Mesut Baran.) This dissertation presents an assessment of the worst case stresses produced in an induction motor when the motor is allowed to ride through a power supply voltage disturbance.