تصفح حسب المؤلف "Refaat, Shady S."
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ANN-based system for a discrimination between unbalanced supply voltage and phase loss in induction motors
Refaat, Shady S.; Abu-Rub, Haitham; Iqbal, Atif ( Institution of Engineering and Technology , 2014 , Conference Paper)It is documented that almost 98% of all voltage generated by electric utilities has up to 3% unbalance. Single phasing fault deserves special attention since phase loss is considered the worst case of unbalanced supply ... -
Fault Tolerance of Stator Turn Fault for Three Phase Induction Motors Star-Connected Using Artificial Neural Network
Refaat, Shady S.; Abu-Rub, Haitham; Saad, M.S.; Aboul-Zahab, E. M.; Iqbal, Atif ( IEEE , 2013 , Conference Paper)This paper proposes the possibility of developing incipient fault diagnosis and remedial operating strategies, which enable a fault tolerant induction motor star-connected winding with neutral point earthed through a ... -
Fractional-order controllers for stick-slip vibration mitigation in oil well drill-strings
Derbal, Massinissa; Gharib, Mohamed; Refaat, Shady S.; Palazzolo, Alan; Sassi, Sadok ( SAGE , 2021 , Article)Drillstring–borehole interaction can produce severely damaging vibrations. An example is stick–slip vibration, which negatively affects drilling performance, tool integrity and completion time, and costs. Attempts to ... -
Hybrid fuzzy sliding mode for stick-slip suppression in drill string systems
Krama, Abdelbasset; Gharib, Mohamed; Refaat, Shady S.; Sassi, Sadok ( Korean Society of Mechanical Engineers , 2022 , Article)Stick-slip vibration is one of the main factors that contribute greatly to reducing the service life of drill string equipment and decreasing the efficiency of the overall drilling system. Thus, it would be very desirable ... -
Multi-objective model predictive control for grid-tied 15-level packed U cells inverter
Trabelsi, Mohamed; Bayhan, Sertac; Refaat, Shady S.; Abu-Rub, Haitham; Ben-Brahim, Lazhar ( IEEE , 2016 , Conference Paper)This paper presents a multi-objective Model Predictive Control (MPC) for grid-tied 4-cell 15-level Packed U Cells (PUC) inverter. This challenging topology is characterized by high power quality with reduced number of ... -
Open and closed-loop motor control system with incipient broken rotor bar fault detection using current signature
Refaat, Shady S.; Abu-Rub, Haitham; Saad, M.S.; Iqbal, Atif ( IEEE , 2014 , Conference Paper)Motor drive system is considered the most important asset in industrial applications. Detection of broken rotor bars has long been important but difficult job in detection area of incipient motor faults. The need for highly ...