Wavelet-based symbolic analysis for detection of broken rotor bars in inverter-fed induction motors

A Symbolic Representation Approach for the Diagnosis of Broken Rotor Bars in Induction Motors

“…The idea behind the intelligent icons is to count the occurrences of symbols or words of symbols creating this way, approximations of the underlying probability mass functions. The rational is similar to the D-Markov modeling approach employed in [24]- [26], where a transition matrix is created by counting transitions between states (where each state is just a word of length D).…”

“…Symbolic dynamics were involved in the detection of broken bars both for inverter-fed [23] and line-fed motors [24], and for the detection of stator voltage imbalance in induction motors [25]. In [26] a variety of fault conditions in an induction motor (voltage imbalance, bearing faults, broken bars) were detected using symbolic filtering.…”

Symbolic Dynamics and Analysis of Time Series Data for Diagnostics of a dc-dc Forward Converter

“…In this paper, we aim to develop a methodology based on Symbolic Dynamics (SD) (Ray, 2004;Rohan, 2006) that can be used to generate diagnostic measures from a degrading dc-dc converter. Symbolic Dynamics has been applied to many systems including inverter fed induction machines (Rohan et al, 2006), fatigue crack diagnosis (Singh et al, 2010), and in nuclear power plant operations (Jin et al, 2011).…”

Wavelet Fault Diagnosis of Induction Motor

“…The wavelet indicator for detecting the broken rotor bars by calculating the absolute values of the summed coefficients in the third pattern which were normalized against the summation of the wavelet coefficient, the number of scales, and the number of samples used was presented by (Supangat et al, 2006& Supangat et al,2007. The V/F control to detect a broken rotor bar in the induction motor was made according to the probability distribution of different operation statuses of healthy and faulty motors used by (Samsi et al, 2006). In this paper, the difference in entropy was used as a measurement indication of fault.…”