2026-04-27T12:51:21Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/645482025-09-05T11:38:17Zcom_10324_1169com_10324_931com_10324_894col_10324_1363

García Calva, Tomás Alberto Moríñigo Sotelo, Daniel Romero Troncoso, René de Jesús 2024-01-15T17:27:07Z 2024-01-15T17:27:07Z 2022 IEEE Transactions on Energy Conversion, vol. 37, no. 2, pp. 1467-1474, June 2022 1558-0059 https://uvadoc.uva.es/handle/10324/64548 10.1109/TEC.2021.3124803 IEEE Transactions on Energy Conversion 37 Producción Científica Rotor fault is a condition that may occur in induction motors due to high forces and stresses on rotor bars or end rings. When this occurs, the machine may lead to a forced outage in production lines. Several methods have been proposed in the literature for the detection of rotor faults; however, they cannot work under variable frequency conditions, and they are very sensitive to mechanical load oscillations. This paper presents a novel frequency normalization methodology for reliable rotor defect diagnosis in variable-frequency drive-fed systems. The normalization is implemented by demodulating the stator current signal with a time-variant factor. As a result, the fundamental component of the stator current is normalized in a constant frequency value, whereas avoiding spectral leakage and frequency smearing. This enables the transient stator current signature analysis to accurately locate targeted fault signatures. The effectiveness of the proposed frequency normalization approach is demonstrated by analyzing the stator current of motors under non-stationary conditions. Experimental results show that the proposed methodology can detect and distinguish between load oscillations and rotor fault signatures for avoiding false rotor fault alarms. Mexican Council of Science and Technology (CONACYT) by the scholarship 487058 application/pdf eng IEEE info:eu-repo/semantics/restrictedAccess IEEE Condition monitoring Fault diagnosis Frequency modulation Induction motors Inverters Time-frequency Transient analysis Load unbalance Spectral analysis Fundamental frequency normalization for reliable detection of fotor and load defects in ASD-fed induction motors info:eu-repo/semantics/article info:eu-repo/semantics/draft https://ieeexplore.ieee.org/document/9601293 SI