Motor current signature analysis has become a widespread fault diagnosis technique for induction machines (IMs), because it is noninvasive and requires low resources of hardware (a sensor) software fast Fourier transform). Nevertheless, its industrial application faces practical problems. One most challenging scenarios the detection broken bars in IMs working at very slip, like large with small...

Abstract General faults in regular electrical railways system could be detect by implementing the specific protection functions such as ground fault or sensitive earth fault. Otherwise, in ungrounded electrical railway systems which using both feeding and return contact rail at the same time, fault detection cannot done with above-mentioned function. Due to recent growth in electrical railway ...

<p>Condition monitoring and on-line detection have attracted several researchers in order to carry out an efficient diagnosis of machine failures. Therefore, the early stage avoids system breakdown reduce maintenance cost. This paper presents a new diagnosic approach detect broken bars end ring faults for squirrel cage induction based on fast Fourier transform analysis applied signature a...

The aim of this paper is to introduce a new methodology for the fault diagnosis of induction 15 machines working in transient regime, when time-frequency analysis tools are used. The proposed 16 method relies on the use of the optimized Slepian window for performing the short time Fourier 17 transform (STFT) of the stator current signal. It is shown that for a given sequence length of finite 18...

The aim of this paper is to introduce a new methodology for the fault diagnosis of induction machines working in the transient regime, when time-frequency analysis tools are used. The proposed method relies on the use of the optimized Slepian window for performing the short time Fourier transform (STFT) of the stator current signal. It is shown that for a given sequence length of finite duratio...

At CCS 2003, a new CRT-RSA algorithm was presented in [BOS03], which was claimed to be secure against fault attacks for various fault models. At CCS 2004, David Wagner presented an attack on the proposed scheme, claiming that the so-called BOS scheme was insecure for all presented fault models [Wag04]. However, the attack itself contains a flaw which shows that although the BOS scheme is broken...

This paper proposes a fault-detection system for faulty induction motors (bearing faults, interturn shorts, and broken rotor bars) based on multiresolution analysis (MRA), correlation fitness values-based feature selection (CFFS), artificial neural network (ANN). First, this study compares two feature-extraction methods: the MRA Hilbert Huang transform (HHT) induction-motor-current signature an...

Multiple coupled circuit modeling (MCCM) of squirrel-cage induction motors (SCIMs), or winding function approach is the most detailed and complete analytical model used to analyze the performance of faulty SCIMs. Already, in variate papers this approach was used to 3phases SCIMs, but this paper extends the above-mentioned model to 6phases SCIMs. Various simulations of variative faults are carri...