An Active-Reactive Power Method for the Diagnosis of Rotor Faults in Three-Phase Induction Motors Operating Under Time-Varying Load Conditions

作者：Cruz Sergio M A^*

来源：IEEE Transactions on Energy Conversion, 2012, 27(1): 71-84.

DOI：10.1109/TEC.2011.2178027

• Active-reactive power
• condition monitoring
• induction machines
• load torque oscillations
• rotor faults

This paper presents a new method to diagnose rotor faults in operating three-phase induction motors under the presence of time-varying loads. The proposed diagnostic strategy relies on a combined analysis of the amplitude and phase spectra of the instantaneous active and reactive powers of the motor, and allows to discriminate the effects introduced by a rotor fault from the ones caused by an oscillating load torque, even when these phenomena occur simultaneously. A theoretical analysis carried out using a linearized model of the induction motor in a synchronous reference frame, complemented with several simulation and experimental results, confirms the validity of the proposed diagnostic approach.

• 出版日期2012-3