Rotor Asymmetries Faults Detection in Induction Machines Under the Impacts of Low-Frequency Load Torque Oscillation
نویسندگان
چکیده
Low-frequency torque oscillations (LTOs) characteristic components emerge in the stator current spectrum of induction machines (IMs) as additive frequencies near rotor asymmetry fault (RAF) indices especially gearbox-based electromechanical system. The interactions between these two make detection process complicated and lead to false alarm. In this paper, a new technique for separation RAF from LTOs IMs based on single phase data is proposed. method benefits novel pre-processing stage several sign functions. Hence, two-axis rotating reference frame with no prior knowledge rotational speed introduced. proposed maps static obtained through its associated Hilbert transform which can separate effects RAF, effectively. validity tested theoretical analysis, experiments both steady-state transient conditions. regard, Synchro-squeezing Wavelet Transforms (SWT) used time-frequency analysis faulty results confirm effectiveness approach frequency even line-fed applications.
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ژورنال
عنوان ژورنال: IEEE Transactions on Instrumentation and Measurement
سال: 2022
ISSN: ['1557-9662', '0018-9456']
DOI: https://doi.org/10.1109/tim.2022.3201950