Induction motors are robust machines used not only for general purposes, but also in
hazardous locations and severe environments. Although these are very reliable, they are
susceptible to many types of faults. However, induction motor drive faults can be detected
in an early stage, in order to prevent the complete failure of the motor drive and ward off
unexpected production costs. In this paper, a simple diagnostic and detection method that
allows the real-time detection and localization of single and multiple open-circuit faults in
the voltage source inverter (VSI) for a three-phase induction motor drive system using just
the motor phase currents, is presented. A model of the system is built using
MATLAB/SIMULINK. Simulation results are presented showing the diagnostic method
performance under distinct operating conditions.