Browsing by Author "n 89184704 "
Now showing items 61-68 of 68
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Postfault operation of a nine-phase six-terminal induction machine under single open-line fault
Abdel-Khalik, Ayman Samy; Hamad, Mostafa S.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)This paper studies the postfault control of a nine-phase six-terminal induction machine (IM) during single open-line fault, which was recently proposed for high-power medium-voltage applications as a promising alternative ... -
Series-connected multi-half-bridge modules converter for integrating multi-megawatt wind multi-phase permanent magnet synchronous generator with dc grid
Elserougi, Ahmed A.; Daoud, Mohamed I.; Abdel-Khalik, Ayman S.; Mohamed Massoud, Ahmed; Ahmed, Shehab ( Institution of Engineering and Technology , 2017 , Article)In this study, a new transformerless wind energy conversion system to integrate high-power multi-phase permanent magnet wind generators to medium-voltage local grids is presented. The proposed converter topology consists ... -
Single-Stage Three-Phase Differential-Mode Buck-Boost Inverters with Continuous Input Current for PV Applications
Darwish, Ahmed; Massoud, Ahmed M.; Holliday, Derrick; Ahmed, Shehab; Williams, B.W. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Differential-mode buck-boost inverters have merits such as reduced switch number, ability to provide voltages higher or lower than the input voltage magnitude, improved efficiency, reduced cost and size, and increased power ... -
Standard three-phase stator frames for multiphase machines of prime-phase order: Optimal selection of slot/pole combination
Abdel-Khalik, Ayman S.; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)Multiphase machines have attracted significant attention in both academic and industrial sectors as candidates for high-power safety-critical applications as well as wind energy conversion systems. Undoubtedly, this interest ... -
Steady-State Equivalent Circuit of Five-Phase Induction Machines with Different Stator Connections under Open-Line Conditions
Abdel-Khalik, Ayman Samy; Ahmed, Shehab; Massoud, Ahmed M. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)The steady-state modeling of multiphase induction machines (IMs) with m phases under open-line fault conditions is usually carried out based on symmetrical component theory. Hence, the estimation of the machine characteristic ... -
Steady-State Mathematical Modeling of a Five-Phase Induction Machine with a Combined Star/Pentagon Stator Winding Connection
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed M. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)This paper presents the steady-state mathematical model of a five-phase induction machine with a combined star/pentagon connection. The connection splits the stator winding into two five-phase windings displaced in space ... -
Three-wire bipolar high-voltage direct current line using an existing single-circuit high-voltage alternating current line for integrating renewable energy sources in multiterminal DC networks
Elserougi, Ahmed; Massoud, Ahmed Mohamed; Abdel-Khalik, Ayman Samy; Ahmed, Shehab ( Institution of Engineering and Technology , 2016 , Article)When compared with conventional point-To-point high-voltage direct current (HVDC) systems, multiterminal HVDC (MTDC) systems are more economical and flexible. MTDC systems can tie distributed high power renewable energy ... -
Transformer-less Grid-Connected High-Voltage Marx Pulse Generator with Unity Power Factor for Domestic Drinking Water Disinfection
Elserougi, Ahmed Abbas; Ahmed, Shehab; Massoud, Ahmed ( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Qatar has no rivers, thus the main natural water resource in Qatar is the groundwater table. The average groundwater recharge from rainfall is approximately 55.9 million m3/year, in addition to 2.2 million m3/year inflow ...