SIMPLE DIAGNOSTIC METHODS FOR DETECTING DAMAGED ROTOR BARS IN SQUIRREL CAGE INDUCTION MOTORS

Abstract

The paper deals with the damaged rotor cage winding and with the possible methods of detecting the damage. The influence of different levels of damaged rotor bars on the motor run was examined with emphasis placed on experimental measurements. Two detection methods are presented as a low-cost alternative to the more advanced and expensive diagnostic methods. Presented methods are capable of detecting those faults in the rotor bars which have practical impact on the motor run. This makes them especially suitable for quick and everyday use in the services of induction motors.