Browsing by Author "n 89184704 "
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Control of Power Converters for Emerging Applications of Power Electronics
Massoud, Ahmed M.; Ahmed, Shehab; Abdel-Khalik, Ayman S.; Elserougi, Ahmed A.; Ahmed, Khaled H. ( Hindawi Publishing Corporation , 2016 , Article)With the skyrocketed development in semiconductor devices, power electronics converters, either at system-level or at device-level, are receiving special attention in different applications as renewable energy sources, ... -
Design of Optimal Droop Control for Multi-Terminal High-Voltage Direct Current Systems During Line Outages
Abu-Elanien, Ahmed E. B.; Abdel-Khalik, Ayman S.; Massoud, Ahmed M.; Ahmed, Shehab ( Taylor and Francis Inc. , 2019 , Article)This article investigates the required modifications to droop control design for optimum operation of Multi-Terminal High-Voltage Direct Current (MTHVDC) systems during line and converter outages. A typical 6-bus MTHVDC ... -
Dynamic 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)The combined star/pentagon connection of five-phase induction machines was recently demonstrated as a promising compromise between conventional star and pentagon connections. It combines the advantages of both star and ... -
Effect of multilayer windings on five-phase interior PM machines
Abdel-Khalik, Ayman S.; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Thanks to their higher power density and efficiency, the interior permanent magnet (IPM) machines equipped with a fractional slot concentrated winding (FSCW) layout have shown potentials in electric vehicle applications. ... -
Effect of Multilayer Windings with Different Stator Winding Connections on Interior PM Machines for EV Applications
Abdel-Khalik, Ayman Samy; Ahmed, Shehab; Massoud, Ahmed M. ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)The interior permanent magnet (IPM) machine equipped with a fractional-slot concentrated winding (FSCW) has met an increasing interest in electric vehicle applications due to its higher power density and efficiency. Torque ... -
Effect of stator winding connection on performance of five-phase linear induction machines
Abdel-Khalik, Ayman S.; Hamad, Mostafa; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)In electric traction, Linear Induction Motors (LIMs) have become a competitive alternative, especially for low speed applications where machines with short stators are commonly used. Due to driving dynamics tolerances, ... -
Enhancing the DC voltage utilization of twelve-switch voltage source inverter feeding symmetrical/asymmetrical nine-phase loads
Elserougi, Ahmed; Abdelsalam, Ibrahim; Massoud, Ahmed; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)Twelve-Switch Nine-Phase Inverter (TSNPI) can be used to feed three independent three-phase loads or nine-phase load such as nine-phase machines. It provides dc-ac conversion with a reduced number of switches, as only ... -
Fault-tolerant control of five-phase current source inverter for medium-voltage drives
Elgenedy, M.A.; Abdel-Khalik, A.S.; Elserougi, A.; Ahmed, Shehab; Massoud, A. ( Institution of Engineering and Technology , 2014 , Conference Paper)Multiphase Machines offer a promising solution to many practical challenges due to their advantages over the three phase counterparts, as fault-tolerant capability and lower torque ripple magnitude. Among different multiphase ... -
Four-Arm Three-Phase Modular Multilevel Converter (4A-TPMMC)
Elserougi, Ahmed A.; Abdelsalam, Ibrahim; Massoud, Ahmed M.; Ahmed, Shehab ( Taylor and Francis Inc. , 2017 , Article)In this paper a Four-Arm Three-Phase MMC (4A-TPMMC)-based DC-AC converter is proposed. The proposed converter generates a three-phase output voltage using a lower number of components, which reduces the converter complexity ... -
Four-switch three-phase SEPIC-based inverter
Diab, Mohamed S.; Elserougi, Ahmed; Massoud, Ahmed M.; Abdel-Khalik, Ayman S.; Ahmed, Shehab ( IEEE , 2014 , Article)Four-switch three-phase (FSTP) inverter has been proposed as an innovative inverter design to reduce the cost, complexity, size, and switching losses of the DC-AC conversion system. Traditional FSTP inverter usually operates ... -
Generation, performance evaluation and control design of single-phase differential-mode buck-boost current-source inverters
Darwish, Ahmed; Massoud, Ahmed; Holliday, Derrick; Ahmed, Shehab; Williams, Barry ( Institution of Engineering and Technology , 2016 , Article)Differential-mode inverter topologies are promising for renewable energy generation since they offer advantages such as passive elements sizes reduction, having decreased power losses and reduced total cost. Single phase ... -
Half-bridge modular multilevel-based HVDC converters with external pre-charged capacitors for dc fault current suppression capability
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)Half-Bridge Modular Multilevel Converters (HB-MMCs) are defenseless against DC side faults. Different types of DC Circuit Breakers (DCCBs) assisted with arrester banks/damping resistors such as solid-state CBs and hybrid ... -
High-voltage pulse generator based on capacitor-diode voltage multiplier centrally fed from dc-dc boost converter
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institution of Engineering and Technology , 2016 , Conference Paper)High voltage pulse generators are commonly used in water treatment applications. In this paper, a high voltage pulse generator with closed loop control on its output voltage is presented. The high-voltage pulse generator ... -
Investigation of sensorless capacitor voltage balancing technique for modular multilevel converters
Elserougi, A.; Daoud, M.I.; Massoud, A.M.; Abdel-Khalik, A.S.; Ahmed, Shehab ( IEEE , 2014 , Conference Paper)Modular Multilevel converters (MMC) have become one of the most promising topologies for DC-AC conversion in recent years. Capacitor voltage balancing is a vital issue for proper operation of the MMC. Generally, conventional ... -
Low-voltage DC input, high-voltage pulse generator using nano-crystalline transformer and sequentially charged MMC sub-modules, for water treatment applications
Elgenedy, M. A.; Massoud, A. M.; Holliday, D.; Ahmed, Shehab; Williams, B ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)This paper proposes a new high-voltage Pulse Generator (PG), fed from low voltage dc supply Vs. This input supply voltage is utilized to charge two arms of series-connected modular multilevel converter sub-module capacitors ... -
Modular Multilevel Converter-Based Bipolar High-Voltage Pulse Generator with Sensorless Capacitor Voltage Balancing Technique
Elserougi, Ahmed A.; Massoud, Ahmed M.; Ahmed, Shehab ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)In order to generate bipolar high-voltage (HV) pulses across certain load from HV dc (HVdc) power supply, a voltage source inverter (VSI) stage should be inserted between the load and the supply. In order to meet the ... -
Multi-module high voltage pulse generator based on DC-DC boost converter and CDVMs for drinking water purification
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)High pulsed electric field (PEF) can be used effectively in drinking water purification, by applying it across the water sample to be treated. Application of sufficient high PEF guarantees killing of harmful germs and ... -
Operation of three-phase modular multilevel converter (MMC) with reduced number of arms
Elserougi, Ahmed; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Conventional three-phase MMC consists of six-arms, each arm is controlled to generate unipolar voltage ranging from zero to Vdc where Vdc is the input DC voltage. Each arm voltage has two components (DC and AC components). ... -
Parameter identification of five-phase induction machines with single layer windings
Abdel-Khalik, Ayman S.; Daoud, Mohamed I.; Ahmed, Shehab; Elserougi, Ahmed A.; Massoud, Ahmed M. ( IEEE , 2014 , Article)Despite the increased interest in multiphase induction machines for safety-critical applications, machine parameter identification for the different sequence planes is still a challenging research point. In most available ... -
Performance of a three-To-five matrix converter fed five-phase induction motor under open-circuit switch faults
Dabour, Sherif M.; Abdel-Khalik, Ayman; Ahmed, Shehab; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Multiphase machines are conventionally fed from voltage source inverters (VSIs) with bulky dc-link capacitors, which represent a technical drawback in high power medium voltage applications. Alternatively, multiphase matrix ...