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This paper introduces an algorithm with a very low computational complexity, which enables to detect rotor asymmetries in induction motors. The proposed approach is based on calculating the negative sequence component of the startup stator currents, and enables to visualize the characteristic pattern of the lower sideband component (LSH) during the startup transient. Unlike previous published approaches,...
Improved fault diagnostic techniques in wind turbines is a field of growing interest, given the negative impact that unexpected breakdowns have on the profitability of wind farms. Traditional and new diagnostic techniques mainly based, respectively, on vibration and generator current monitoring cannot be applied easily to small wind groups due to the very restrictive cost limitations. This paper proposes...
Most of automation systems in industry are based on Programmable Logical Controllers (PLCs) due to its reliability and immunity to industrial environments. Besides, PLCs's flexibility and capabilities have allowed human to automate a huge number of industrial processes. In this paper a new multilevel graphical and modular approach is proposed for programming industrial PLCss. Traditional programming...
This paper introduces a new method of fault diagnosis for induction motors, the Multilayer Park's Vector Approach, derived from the well-known fault diagnostic method based on Park's Vector Approach analysis. This new method allows the detection of failures in steady and transient regimes operation on induction motors. The resulting vector generated provides the information about deviations in the...
Diagnosis of faults in induction motors has been accomplished traditionally following a two stage procedure: first, the selected diagnostic quantity is measured and treated with an appropriate signal analysis tool, and, second, the diagnostic signal is evaluated, either by trained personnel or by automatic systems, to determine the presence and the severity of the fault. The techniques used in each...
Induction motors play a key role in the industrial field. Therefore, continuous monitoring and online diagnostic systems are essential to guarantee the seamless operation of modern industrial facilities. But, in moder automation installations, motor operation is controlled by programmable logic controllers (PLCs), which have become the main field controllers in automated process. This paper proposed...
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