An essential part of the intelligent management of an industrial plant is the predictive maintenance to be applied for all the equipment, including also electrical machines. Several fault detection techniques were developed in the past years for the most frequently used rotational electrical machines, but only a few papers were published in the field of condition monitoring of special electrica...

Condition monitoring is an important issue in the maintenance of electrical machines. In the last years several methods for fault diagnosis of the squirrel-cage induction motors were cited in the literature. Among these methods the Motor Current Signature Analysis (MCSA) is considered the most effective non-invasive fault detection method, because it can easily detect all the common electrical ...

An intelligent knowledge-based system (IKBS) for fault diagnosis and supply restoration in a vehicle is introduced. The system is based on techniques used successfully in the electrical power supply industry. The IKBS communicates with a simulator-store that remembers past faults. Scenarios are described to illustrate fault diagnosis and supply restoration. Manufacturers are replacing mechanica...

reflection and refraction of em signals at both horizontal and vertical interfaces separate media of different electrical parameters, geoelectromagnetic methods have been developed and employed to recognize the geological features and particularly fault zones in many regions. to achieve higher lateral resolution and also greater depth penetration, the mt method is one of the most effective elec...

Although electrical simulation has become a vital tool in the design process of memory devices, memory testing has not yet been able to employ electrical simulation as an integral part of the test generation and optimization process. This is due to the exponential complexity of the simulation-based fault analysis, a complexity that made such an analysis impractical. This paper describes new met...

Rapid developments are occurring in design of electrical machines and its control. To get optimum performance under normal/fault condition needs implementation of fault tolerance. Next decade is of Permanent Magnet Synchronous Machines. The paper presents mathematical modeling of PMSM. A current and speed controller is designed to implement fault tolerance and its stability analysis.

Overhead transmission line is an element of electrical power systems that are most frequently experienced short circuit faults compared to other power system elements. Short circuit faults on overhead transmission line cause a relatively large current and therefore can damage mechanically the electrical equipment connected to the system. The protection system is essentially needed in this situa...

The ability of the electromagnetic flux measured in various locations of a 35-kW cage induction motor to provide useful information about faults was investigated. The usefulness of this monitoring parameter was assessed in comparison with some other electrical parameters used for fault detection, such as stator phase current and circulating currents between the parallel branches of the stator w...

Current spectrum analysis is a proven technique for fault diagnosis in electrical machines. Current spectral estimation is usually performed using classical techniques such as periodogram (FFT) or its extensions. However, these techniques have several drawbacks since their frequency resolution is limited and additional post-processing algorithms are required to extract a relevant fault detectio...

In this paper, short circuit analysis, based on the electromagnetic transient program (EMTP), has been used to investigate the behavior of the DC reactor type FCL installed in an electrical distribution grid. System studies show that the DC reactor type FCL can not only limit the fault current to an acceptable value, but also can mitigate the voltage sag. A DC reactor type fault current limiter...