Browsing by Author "Abdel-Khalik, A."
Now showing items 21-40 of 42
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A design example of an 8-pole radial AMB for flywheel energy storage
Daoud, Mohamed I.; Abdel-Khalik, A. S.; Massoud, A.; Ahmed, S.; Abbasy, Nabil H. ( IEEE , 2012 , Conference Paper)High speed flywheel energy storage systems normally use magnetic bearings to reduce friction loss. Bearing load consists of radial forces with or without axial forces according to drive configuration and requirements. The ... -
Effect of DC-Link Voltage Limitation on Postfault Steady-State Performance of Asymmetrical Six-Phase Induction Machines
Abdel-Khalik A.S.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)The asymmetrical six-phase induction machine represents the most common multiphase machine type used in many high-power industrial applications. While a body of research covering control of the machine under fault conditions ... -
Enhancement of the extracted maximum power of PV array during partial shading using switched PV-based system
Elserougi, A.; Diab ,M. S.; Abdel-Khalik, A.; Massoud, Ahmed; Ahmed, S. ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)This paper proposes a switched PV approach to enhance the extracted maximum power from PV array during partial shading condition. The proposed system is simple and cost effective. However, it may provide lower power ... -
Exploitation of additional degrees of freedom of multiphase drives in low-frequency operation of modular multilevel converters
Daoud M.; Elserougi A.; Abdel-Khalik A.; Massoud A.; Bojoi R.; Ahmed S.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)MMC encounters serious limitations in the zero and low-frequency operation of variable-speed motor drives. In MMC, the voltage ripples of SubModule (SM) capacitor is inversely proportional to the phase current frequency. ... -
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 ... -
HVDC shunt tap based on series-input parallel-output DC-AC multi-module VSCs with DC voltages balancing
Elserougi, A.; Massoud, Ahmed; Abdel-Khalik, A.; Ahmed, S. ( Institution of Engineering and Technology , 2014 , Conference Paper)Conventionally, tapping-off a small amount of power from an HVDC transmission line to a three-phase local network can be achieved using a DC-to-AC voltage source converter (VSC) followed by a step down transformer. In order ... -
Hybrid-boost modular multilevel converter-based medium-voltage multiphase induction motor drive for subsea applications
Daoud M.; Elserougi A.; Massoud A.; Bojoi R.; Abdel-Khalik A.; Ahmed S.... more authors ... less authors ( Korean Institute of Power Electronics , 2019 , Article)This paper proposes a hybrid-boost Modular Multilevel Converter (MMC) for the Medium-Voltage (MV) Variable Speed Drives (VSDs) employed in subsea applications, such as oil and gas recovery. In the presented architecture, ... -
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 space harmonics cancelation in double-layer fractional slot winding using dual multiphase winding
Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)One of the main drawbacks of nonoverlapped coils in fractional slot concentrated winding permanent magnet (PM) machines are the high eddy current losses in both rotor core and permanent magnets induced by the asynchronous ... -
Low-order space harmonic modeling of asymmetrical six-phase induction machines
Abdel-Khalik A.S.; Hamdy R.A.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)Multiphase machines are commonly analyzed using vector space decomposition modeling technique, where the original phase variables are decomposed into multiple orthogonal subspaces. The machine torque production and, ... -
Magnetic gearbox with an electric power output port and fixed speed ratio for wind energy applications
Abdel-Khalik, A.; Ahmed, S.; Massoud, Ahmed; Elserougi, A. ( IEEE , 2012 , Conference Paper)Mechanical gearboxes are typically employed with doubly-fed induction generator-based wind turbines. The main drawback of this solution is the gearbox's reliability and maintenance. Using magnetic gearbox in conjunction ... -
Maximum power transfer of PV-fed inverter-based distributed generation with improved voltage regulation using flywheel energy storage systems
El-Deeb, H.M.; Daoud, M.I.; Elserougi, A.; Abdel-Khalik, A.S.; Ahmed, S.; Massoud, Ahmed... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)One of the main issues accompanied with the high penetration of PV distributed generation (DG) systems in low voltage (LV) networks is the overvoltage challenge. The amount of injected power to the grid is directly related ... -
Model-predictive control for common-mode voltage reduction and third-harmonic current injection techniques with five-phase inverters
Dabour S.M.; Abdel-Khalik A.S.; Ahmed S.; Massoud A. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper employs a Model Predictive Control (MPC) technique to reduce the Common-Mode-Voltage (CMV) in five-phase inverters when third harmonic current injection is applied. According to the inverter space vector model, ... -
Modeling and Control of Single-Stage Quadratic-Boost Split Source Inverters
Dabour, S.M.; Alotaibi, M.; Abd-Elaziz, A. A.; Alshahat, M.A.; Abdallah, M.; Eltamaly, A.M.; Abdel-Khalik, A.; Massoud, Ahmed; Ahmed, S.... more authors ... less authors ( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)This paper aims to develop the recently introduced Spilt-Source Inverter (SSI) topology to improve its boosting characteristics. New SSI topologies with high voltage gain are introduced in this paper. The proposed converters ... -
Nine-Phase Six-Terminal Induction Machine Modeling Using Vector Space Decomposition
Abdel-Khalik A.S.; Massoud A.M.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The nine-phase six-terminal induction machine (IM) has been recently proposed as a promising contender to the conventional asymmetrical six-phase type in terms of torque density, stator winding simplicity, and fault-tolerant ... -
Nine-phase six-terminal pole-amplitude modulated induction motor for electric vehicle applications
Abdel-Khalik A.S.; Massoud A.; Ahmed S. ( Institution of Engineering and Technology , 2019 , Article)In electric drive applications that are based on high-speed induction motors (IMs) with an extended speed range, stator winding pole-changing is a possible technique to avoid oversizing the driving motor. The electronic ... -
On the development of flywheel storage systems for power system applications: A survey
Daoud, Mohamed I.; Abdel-Khalik, A. S.; Massoud, A.; Ahmed, S.; Abbasy, Nabil H. ( IEEE , 2012 , Conference Paper)Energy storage systems cannot be considered energy sources but having the ability of storing and discharging energy. They have a vital rule in the reliability and power quality of power systems. There are several energy ... -
Performance evaluation of an on-board integrated battery charger system using a 12-Slot/10-pole surface-mounted PM propulsion motor
Abdel-Khalik A.S.; Ahmed S.; Massoud A.M. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)The concept of Electric Vehicles (EVs) withonboard integrated battery chargers, which can be directly connected to the three-phase ac mains, has recently emerged as a cost effective and a practical alternative to charging ... -
Sensor-less operation of hybrid boost modular multilevel converter for subsea multiphase medium voltage drives
Daoud M.; Massoud A.; Elserougi A.; Abdel-Khalik A.S.; Ahmed S. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper introduces Hybrid Boost Modular Multilevel Converter (Hybrid Boost MMC) as a suitable candidate for subsea drive systems. The investigated drive system is based on a five-phase Induction Machine (IM) in order ... -
Single sensor three-phase permanent magnet synchronous motor drive based on Luenberger style-observers
Hafez, B.; Abdel-Khalik, A.; Massoud, Ahmed; Ahmed, S.; Lorenz, R. D. ( IEEE , 2012 , Conference Paper)This paper presents a technique to estimate phase currents and rotor position in a vector-controlled PMSM drive using only dc-link current measurement. Three cascaded Luenberger style observers were used to perform this ...