RT info:eu-repo/semantics/article
T1 Fundamental Frequency Normalization for Reliable Detection of Rotor and Load Defects in ASD-fed Induction Motors
A1 García Calva, Tomás Alberto
A1 Moríñigo Sotelo, Daniel
A1 Romero-Troncoso, René de Jesús
K1 Condition monitoring
K1 Fault diagnosis
K1 Frequency modulation
K1 Induction motors
K1 Inverters
K1 Time-frequency
K1 Transient analysis
K1 Load unbalance
K1 Spectral analysis
AB 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.
PB IEEE
SN 1558-0059
YR 2022
FD 2022-06
LK https://uvadoc.uva.es/handle/10324/64548
UL https://uvadoc.uva.es/handle/10324/64548
LA eng
NO IEEE Transactions on Energy Conversion, vol. 37, no. 2, pp. 1467-1474, June 2022
NO Producción Científica
DS UVaDOC
RD 20-may-2024