Browsing by Author "n 2014186122"
Now showing items 41-60 of 167
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A switched PV approach for extracted maximum power enhancement of PV arrays during partial shading
Elserougi, A. A.; Diab, M. S.; Massoud, Ahmed; Abdel-Khalik, A. S.; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)This paper proposes a switched photovoltaic (PV) approach to enhance the extracted maximum power from a PV array during partial shading conditions. The proposed system is simple and cost effective. However, it may provide ... -
A voltage-behind-reactance model of five-phase induction machines considering the effect of magnetic saturation
Abdel-Khalik, A. S.; Ahmed, S.; Elserougi, A.A.; Massoud, Ahmed ( IEEE , 2013 , Article)Five-phase induction machines are generally modeled using multiple dq planes or using a phase variable model. This paper considers modeling five-phase induction machines using a voltage-behind-reactance (VBR) configuration. ... -
A wind turbine architecture employing a new three port magnetic gear box
Abdel-Khalik, A.S.; Elserougi, A.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2012 , Conference Paper)Mechanical gearboxes are typically employed with doubly-fed induction generator based wind turbines to convert the turbine's low speed mechanical power into high-speed mechanical power to drive the electrical generator. ... -
A Zeta-converter based four-switch three-phase DC-AC inverter
Diab, M.S.; Elserougi, A.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)Minimizing the number of active switching devices in switched-mode power-electronic systems has a significant importance. Reduced complexity and switching losses, low cost, weight, and volume and high reliability are the ... -
Active and reactive power management of photovoltaic-based interline dynamic voltage restorer in low voltage distribution networks
Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( IEEE Computer Society , 2012 , Conference Paper)A dynamic voltage restorer (DVR) is a series connected device that can support the voltage at existing critical loads during voltage sags. Voltage restoration may need active and/or reactive power injection into the ... -
An active damping technique for a current source inverter employing a virtual negative inductance
Morsy, A. S.; Ahmed, S.; Enjeti, P.; Massoud, Ahmed (2010 , Conference Paper)A grid connected CSI requires a CL filter stage. In this work, the isolation transformer leakage inductance constitutes this filter inductance. This CL filter is lightly damped for efficiency constraints. Hence, it is ... -
An adaptive PR controller for inverter-based distribution generation with active damped LCL filter
El-Deeb, H. M.; Elserougi, A.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( IEEE , 2013 , Conference Paper)The fact distribution generation (DG) importance is growing rapidly in the recent years where the coupling between DG sources and the grid is done through inverters where exporting low distorted currents and high quality ... -
An asymmetrical six phase induction machine for flywheel energy storage drive systems
Daoud, M.I.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Energy storage systems have become an essential part of power utilities due to their capability of providing high level of power quality and stability. Flywheel energy storage systems (FESSs) are now employed with numerous ... -
An asymmetrical six-phase induction motor drive based on nine-arm Modular Multilevel Converter (9AMMC) with circulating current suppression
Elserougi, A.A.; Abdel-Khalik, A.S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)Asymmetrical six-phase (dual three-phase) induction motors have received significant attention in high power medium voltage drive applications. Normally, two three-phase voltage source converters are used to supply the ... -
An axial magnetic gearbox with an electric power output port
Zaytoon, H.; Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Recently, magnetic gearboxes (MGBs) are attracting more followers as they offer great benefits over conventional mechanical gearboxes including contactless operation, lower noise, lower vibration, and they are maintenance-free. ... -
An enhanced performance IPT based battery charger for electric vehicles application
Abdelhamid, E.; Abdelsalam, A.K.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)World-wide scientists/engineers were motivated to research in the area of renewable energy resources and to reduce the consumption of fossil fuels. Hence, electric and hybrid vehicles have won the attention of many researchers ... -
An H-Bridge Modular DC-DC Converter with Bidirectional Flyback-Based Energy Equalization Modules
Elserougi A.; Massoud A.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)Conventional Modular Multilevel Converter (MMC) is a promising candidate in high-voltage high-power applications. Unfortunately, operating the conventional MMC with DC output voltage results in unbalanced capacitors' ... -
An improved performance direct-drive permanent magnet wind generator using a novel single-layer winding layout
Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed; Elserougi, A. A. ( IEEE , 2013 , Article)Direct-drive permanent magnet (PM) generators have become a strong contender in medium and large rating wind energy conversion systems as they not only provide higher efficiency and annual energy production, but also reduce ... -
An Improved Torque Density Pseudo Six-Phase Induction Machine Using a Quadruple Three-Phase Stator Winding
Abdel-Khalik, A. S.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)The nine-phase six-terminal induction machine has recently been proposed as a promising contender to the conventional six-phase asymmetrical winding machine in terms of torque density, phase current quality, stator winding ... -
An Optimal PWM Technique for Dual-Output Nine-Switch Boost Inverters with Minimum Passive Component Count
Dabour, S.M.; Abdel-Khalik, A. S.; Ahmed, S.; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)Nine-Switch inverter (NSI) has been recently introduced for independent control of dual ac motors. Although this topology reduces the number of active switches by 25% compared to conventional inverters, it has a main ... -
Analysis of Scalar PWM Approach with Optimal Common-Mode Voltage Reduction Technique for Five-Phase Inverters
Dabour S.M.; Abdel-Khalik A.S.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)Research on common-mode-voltage (CMV) reduction in multiphase drive systems has recently met an intensified interest in the available literature. This paper first explores two existing space-vector-based CMV reduction ... -
Application of Standard Three-Phase Stator Frames in Prime Phase Order Multiphase Machine Construction
Abdel-Khalik A.S.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The application of multiphase machines in high-power applications is now a recognized alternative, thanks to their higher fault-Tolerance when compared with standard three-phase systems. Although multiphase machines with ... -
Assessment of fault-ride through capability of grid-connected brushless DFIG wind turbines
Azmy, I.; Abdel-Khalik, A.; Massoud, Ahmed; Ahmed, S. ( Institution of Engineering and Technology , 2011 , Conference Paper)DFIGs are reported to suffer serious reliability problems due to the presence of slip-rings, brushes and gearbox. These disadvantages encouraged several research groups to investigate the viability of employing single-frame ... -
Assessment of sensorless Kalman filter-based dual-loop control strategies for grid-connected VSIs with LCL filters
El-Deeb, H.M.; Massoud, Ahmed; Abdel-Khalik, A. S.; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)This paper illustrates the assessment between the multiloop control strategies that aim to damp the resonance hazard of LCL-filters and expanding the available stability margins. The establishment of the multiloop control ... -
Bidirectional buck-boost inverter-based HVDC transmission system with AC-side contribution blocking capability during DC-side faults
Elserougi, A. A.; Massoud, Ahmed; Abdel-Khalik, A.S.; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)Offshore wind energy is now seen as a key contributor for the future renewable energy mix. HVDC technology is among the chief technologies enabling widespread use of offshore wind. Thanks to their numerous advantages, ...