Influence of the Start-up System in the Diagnosis of Faults in the Rotor of Induction Motors using the Discrete Wavelet Transform

Wavelet Transform Based Fault Identification and Reconfiguration for a Reduced Switch Multilevel Inverter Fed Induction Motor Drive

“…In the WT method, the width of the window is changed as the transform is computed for each spectral component [24,25]. This multiresolution analysis (MRA) allows for the identification of abrupt variations in electrical parameters such as voltage, current and frequency [17]. Wavelets are localized in both the time and frequency domains, while Fourier transforms are only localized in the frequency domain.…”

“…Based on the outputs of a multilevel inverter at various frequency bands, the effect of faults, fault types and fault occurrences, can be extracted by using a discrete wavelet transform (DWT) [17]. Wavelet techniques have been developed for interrogating and manipulating signals in different applications areas, including in electric vehicles, signal processing, power electronics and mechanical systems [18][19][20], with decomposition levels usually between 4 and 10.…”