Detection of broken rotor bars and eccentricity during the starting transient of three-phase induction motors

This paper proposes to use the full spectrum of the stator currents during the starting transient of three-phase induction motors to detect broken rotor bars and mixed eccentricity. The full spectrum contributes to a more accurate diagnosis for some fault conditions with respect to traditional steady-state MCSA techniques or modern techniques such as the spectrogram of a stator current during the starting transient. The temporal evolution of the components associated with these faults is analyzed. The proposed strategy is validated through simulation results.