On-line rotor mixed fault diagnosis way based on spectrum analysis of average instantaneous power in squirrel cage induction motors

An approach of on-line condition monitoring and mixed faults diagnosis for the squirrel cage induction motors is introduced in this paper. The proposed approach is based on spectral analysis of the average instantaneous power, which requires no stator or rotor parameters and has ability to separate mixed rotor faults. Theoretical analysis and experimental results demonstrate the effectiveness of the approach.