Browsing by Author "n 89184704 "
Now showing items 21-40 of 68
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A permanent-magnet machine with improved torque density based on a single layer winding layout for electric vehicle applications
Abdel-Khalik, A.S.; Gadoue, S.; Ahmed, Shehab; Massoud, A. ( IEEE , 2014 , Conference Paper)This paper proposes a novel single layer winding layout for a permanent magnet machine with improved torque density for electric vehicle applications. In this paper, two permanent-magnet (PM) machines with outer rotors and ... -
A Pulsewidth Modulation Technique for High-Voltage Gain Operation of Three-Phase Z-Source Inverters
Diab, Mohamed S.; Elserougi, Ahmed A.; Massoud, Ahmed M.; Abdel-Khalik, Ayman S.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Z-source inverter (ZSI) was recently proposed as a single-stage buck-boost dc-ac power conversion topology. It augments voltage boost capability to the typical voltage buck operation of the conventional voltage source ... -
A Senior Project-Based Multiphase Motor Drive System Development
Abdel-Khalik, Ayman S.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Adjustable-speed drives based on multiphase motors are of significant interest for safety-critical applications that necessitate wide fault-tolerant capabilities and high system reliability. Although multiphase machines ... -
A sensorless Kalman filter-based active damping technique for grid-tied VSI with LCL filter
Eldeeb, Hisham; Massoud, Ahmed; Abdel-Khalik, Ayman S.; Ahmed, Shehab ( Elsevier Ltd , 2017 , Article)Employing the LCL passive filter in inverter-based distributed generation to ensure high quality power delivery comes at the expense of poor performance due to the resonance phenomenon. Literature elucidated several active ... -
A series flywheel architecture for power levelling and mitigation of DC voltage transients in multi-terminal HVDC grids
Gowaid, Islam Azmy; Elserougi, Ahmed Abbas; Abdel-Khalik, Ayman Samy; Massoud, Ahmed Mohamed; Ahmed, Shehab ( Institution of Engineering and Technology , 2014 , Article)This study proposes a new architecture of flywheel energy storage system (FESS) which can be implemented at generating unit (GU) level (e.g. wind turbine) or scaled up for application in grid-side converter (GSC) stations ... -
A Six-Phase 24-Slot/10-Pole Permanent-Magnet Machine with Low Space Harmonics for Electric Vehicle Applications
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed M. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)This paper proposes a six-phase surface-mounted permanent-magnet machine with a 24-slot/10-pole fractional slot winding, which not only eliminates the air-gap flux subharmonics, but also minimizes the effect of slot ... -
A space vector PWM scheme for five-phase current-source converters
Elgenedy, Mohamed A.; Elserougi, Ahmed A.; Abdel-Khalik, Ayman S.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)The most recent literature on multiphase machine drives is based on voltage-source converter (VSC) systems utilizing different modulation techniques. Very little attention is given to the multiphase current-source converters ... -
A static three-phase to five-phase transformer based on Scott connection
Abdel-Khalik, A.S.; Shafik, Z.; Elserougi, A.; Ahmed, Shehab; Massoud, A. ( Elsevier B.V. , 2014 , Article)Multiphase machines have become challenging candidates for safety-critical applications that require wide fault tolerant capabilities and higher system reliability. However, this adds more complexity to the adopted power ... -
A Switched-Capacitor Submodule for Modular Multilevel HVDC Converters with DC-Fault Blocking Capability and a Reduced Number of Sensors
Elserougi, Ahmed A.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Modular multilevel converters (MMCs) have become one of the most promising topologies for high-voltage dc-ac conversion. DC-side fault blocking capability of the MMC has prompted significant research in recent years. In ... -
A transformerless STATCOM based on a hybrid Boost Modular Multilevel Converter with reduced number of switches
Elserougi, Ahmed A.; Massoud, Ahmed M.; Ahmed, Shehab ( Elsevier Ltd , 2017 , Article)This paper proposes a new three-phase transformerless STATic synchronous COMpensator (STATCOM) for shunt reactive power compensation in medium/high-voltage applications. The proposed STATCOM is based on a hybrid Boost ... -
A Unipolar/Bipolar High-Voltage Pulse Generator Based on Positive and Negative Buck-Boost DC-DC Converters Operating in Discontinuous Conduction Mode
Elserougi, Ahmed A.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)This paper presents a new high-voltage pulse generator, which is based on positive and negative buck-boost (BB) converters fed from a relatively low voltage dc supply. The proposed generator is able to generate unipolar ... -
AC-powered multi-module high-voltage pusle-generator with sinusoidal input current for water treatment via underwater pulsed arc discharge
Elserougi, Ahmed A.; Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed M. ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)The underwater pulsed arc discharge is one of the effective methods in water treatment applications. In pulsed arc discharge, a pulsed output in the range of 1-10 kV is typically applied across the water treatment chamber ... -
An asymmetrical six-phase induction machine-based flywheel energy storage system using modular multilevel converters
Daoud, M. I.; Massoud, A.; Abdel-Khalik, A.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)Energy storage systems have become an essential pillar in most of electrical engineering applications due to introduced technical and economical merits, particularly following the pronounced grid-integration of renewable ... -
An Improved Fault Tolerant Five-Phase Induction Machine Using A Combined Star/Pentagon Single Layer Stator Winding Connection
Abdel-Khalik, Ayman S.; Elgenedy, Mohamed A.; Ahmed, S.; Massoud, Ahmed M. ( IEEE , 2015 , Article)One of the main merits offered by multiphase machines is their high fault-tolerant capability. Literature has demonstrated that the performance of multiphase induction machines under fault conditions is affected by the ... -
An interline dynamic voltage restoring and displacement factor controlling device (IVDFC)
Elserougi, A.; Massoud, Ahmed Mohamed; Abdel-Khalik, A.S.; Ahmed, Shehab; Hossam-Eldin, Ahemd Abdalla ( IEEE , 2014 , Article)An interline dynamic voltage restorer (IDVR) is invariably employed in distribution systems to mitigate voltage sag/swell problems. An IDVR merely consists of several dynamic voltage restorers (DVRs) sharing a common dc ... -
Application of stator shifting to five-phase fractional-slot concentrated winding interior permanent magnet synchronous machine
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Article)In many applications, interior permanent magnet synchronous machines (IPMSMs) with fractional slot concentrated windings (FSCWs) are considered promising candidates in terms of higher power density and efficiency. In ... -
Arrester-less DC fault current limiter based on pre-charged external capacitors for half-bridge modular multilevel converters
Elserougi, Ahmed A.; Massoud, Ahmed M.; Ahmed, Shehab ( Institution of Engineering and Technology , 2017 , Article)The half-bridge modular multilevel converter (HB-MMC) is one of the most promising topologies for high-voltage direct current (HVDC) systems. Unlike full-bridge MMC (FB-MMC) and clamp double sub-module MMC (CDSM-MMC), ... -
Boost inverter-based HVDC transmission system with inherent blocking capability of AC side contribution during DC side faults
Elserougi, A.; Massoud, A.M.; Abdel-Khalik, A.S.; Ahmed, Shehab ( Elsevier Ltd , 2014 , Article)Semiconductor advancements in the past three decades have positioned the voltage source converter-based HVDC (VSC-HVDC) solution as a practical and popular alternative to its line-commutated converter high voltage DC ... -
Common-mode voltage reduction of matrix converter fed seven-phase induction machine
Dabour, S. M.; Abdel-khalik, A. S.; Ahmed, Shehab; Massoud, A. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)This paper introduces space vector modulation (SVM) schemes for reducing the common mode voltage (CMV) of a direct three-to seven-phase matrix converter (3?7 MC) fed a seven-phase induction motor. The proposed techniques ... -
Conceptual study of a Bipolar modular high voltage Pulse generator with sequential charging
Elserougi, Ahmed; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Repetitive Pulsed Electric Field (PEF) is a common technique for disinfecting liquids. By applying adequate PEF across germ cell membranes, an irreversible electroporation process, and cell destruction can be achieved. The ...