Predicting behavior of induction motors during electrical service faults and momentary voltage interruptions

Dynamic simulations are used to predict the low voltage ride-through performance of three common motor and power source configurations. The objectives are to identify motor control and protection strategies that increase the motor´s immunity to expected low voltage events while pointing out specific problems and opportunities. Configurations include transfer of a group of motors from one power source to another, ride-through of a single motor during low voltage events, and ride-through of a motor buffered by an adjustable-speed drive. Low voltage conditions match those expected to occur due to faults in the utility power system with the transformer connection considered.<>