essamudin ebrahim - Academia.edu (original) (raw)

Papers by essamudin ebrahim

Research paper thumbnail of Real-time advanced sensorless control of axial flux synchronous motor

International Journal of Power Electronics and Drive Systems/International Journal of Electrical and Computer Engineering, Sep 1, 2024

Research paper thumbnail of Optimal Design of SAPFs for Harmonic Mitigation of Electric Arc Furnaces with Real-Time Digital Simulation Hardware

Research paper thumbnail of Real-Time Implementation of SAPF-Coupled PV Grid Connected Using Artificial Hummingbird Algorithm for Power-Quality Enhancement

Research paper thumbnail of Dynamic performance enhancement of nonlinear AWS wave energy systems based on optimal super-twisting control strategy

Ain Shams Engineering Journal/Ain Shams Engineering Journal, May 1, 2024

Research paper thumbnail of Optimal super twisting sliding mode control strategy for performance improvement of islanded microgrids: Validation and real-time study

International journal of electrical power & energy systems, Jun 1, 2024

Research paper thumbnail of Real-Time Implementation for the Robust Controller of the Switched Boost Inverter within an Autonomous Modified Nanogrid

International Journal of Electrical Engineering and Computer Science, Jan 15, 2024

SBI stands for switched-boost inverter and is a single-stage power converter used to connect low-... more SBI stands for switched-boost inverter and is a single-stage power converter used to connect low-power sources, such as solar photovoltaic (PV) arrays within a modified nanogrid, to loads. Despite its many benefits, such as the fact that it does not require expensive sophisticated dead-time circuitry, its duty ratio is limited to between 0 and 0.5. As a result, this publication is a contribution towards improving the SBI's performance for use in a modified nanogrid. Furthermore, it also presents a revolutionary strategy for a simple closed-loop control technique that overcomes the majority of inverter shortcomings and system nonlinearity. The suggested robust controller uses a metaheuristic optimization technique, called gorilla troops optimization (GTO), to optimize the performance of this controller. The robustness of the suggested controller is tested against the sudden change of the nanogrid input voltage (i.e., PV-voltage), modulation index of the inverter, and the step-change in DC-link output voltage of the inverter. The test results obtained from Matlab/Simulink software are compared with particle swarm optimization (PSO)-as another optimization algorithm. Furthermore, the proposed system is experimentally implemented with OPAL RT-4510v real-time hardware in the loop (HIL), rapid control prototyping, OP-8660 HIL controller and data acquisition platform.

Research paper thumbnail of Real-Time Implementation of BLDC Motor-Based Intelligent Tracking Control Fed from PV-Array for E-Bike Applications

WSEAS TRANSACTIONS ON POWER SYSTEMS

The essential goal of this research is designing and modeling a speed and position tracking syste... more The essential goal of this research is designing and modeling a speed and position tracking system for driving an electric bike (e-bike) motordrive. This motor is a brushless DC (BLDC) motor as a high-performance drive. It is supplied from twin electric sources to drive it and charge the storage elements (i.e., batteries, super-capacitors, etc.). The first one is a renewable, neat, and clean source photovoltaic (PV) module and the second one is a pedal generator driven by the rider. The submitted design of the controllers is optimized to improve the system’s dynamic stability. The artificial bee colony (ABC) as an artificial intelligent (AI) algorithm is suggested for searching the optimal gains of the proposed proportional-integral-derivative (PID) controllers by reducing the error of its fitness function. The system behavior is studied with that controller when directly feeding from the PV array with and without batteries. The response of the proposed technique - against dynamic t...

Research paper thumbnail of Hardware in the Loop-Based Testing of Three Schemes for Mitigation the Effect of Unsymmetrical Grid Faults on DFIG

WSEAS TRANSACTIONS ON POWER SYSTEMS

This paper presents three-proposed schemes to mitigate the effect of unsymmetrical voltage sag fa... more This paper presents three-proposed schemes to mitigate the effect of unsymmetrical voltage sag fault on a wind-driven grid-connected Double Fed Induction Generator (DFIG). The first tested scheme comprises a static compensator (STATCOM) connected to the DFIG stator, while a three-phase parallel RL external impedance is connected to the rotor circuit in the second scheme. The STATCOM and the added rotor impedance are connected simultaneously in the third scheme. The effect of applying the three schemes on the responses of the stator and rotor voltages and currents, the dc-link voltage and current, the electrical torque, and the rotor speed during an unsymmetrical voltage sag are presented and compared at sub-and super-synchronous speeds. All systems were emulated, implemented, and tested through an OPAL RT-4510 Digital Real-Time Simulator (DRTS) in a Hardware-In-the-Loop (HIL) application. The internal Field-Programmable Gate Array (FPGA) chip assisted in using this platform as a Rap...

Research paper thumbnail of Modeling of a Contact-Less Electric-Vehicle Battery-Charging Station Fed from On-Grid Photovoltic Arrays

IntechOpen eBooks, Dec 18, 2019

Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In ... more Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In addition, there is no noise through operation. However, up to now, there are some challenges that facing its spread through all over the world. The main problem that these vehicles face is the fast charging process of the used batteries through neat and clean source without plugs. So, this chapter deals with a proposed method for a contactless battery charger of both electric and hybrid electric vehicles (HEVs) from renewable resources. The chapter proposes a public station for fast charging. This station implies off-board battery charger fed from on-grid (OG) photovoltaic (PV) arrays through inductively power transfer (IPT). This comfortable 100 kW contactless power station is designed, modeled, and simulated as a general software package reliable to be used for any other station design. The air gap of the air-core transformer (ACT) divides the station into two parts. The first part implies roof-mounted PV array with its intelligent-controlled maximum power point tracking (MPPT) technique, power converter, three-level power inverter, and resonant compensator converter that operates at high frequency. The second one includes rectifiers and switched mode power converter with smart controller. The chapter includes samples for simulation results that are obtained from the Matlab software package.

Research paper thumbnail of Electric-Power Recovery for the Mechanical Damper in a Vehicle-Suspension System Using Artificial Intelligent Control

Vehicle System Dynamics, 2004

The suspension elements must be mounted between the vehicle body and wheel axle to minimize undes... more The suspension elements must be mounted between the vehicle body and wheel axle to minimize undesirable shake for passengers. Parts of mechanical shake energy are transferred to heat energy by such mechanical damper elements in the vehicle-suspension system. So, the new part of this paper is how to utilize or recover this dissipated energy as electrical energy instead of heat energy. So, a new suggested suspension system will be introduced. In this proposed technique, an electric linear generator is used as an electrical damper in parallel to the spring instead of the mechanical damper element to recover this dissipated power. This generator is exposed to dynamic forces as equal as to the mechanical damper through the minimised shake. Dependently, the generator transfers undesirable randomly mechanical shake energy in the suspension systems to electric power instead of heat energy due to friction. But, the main problem here is the randomization of such generated power. So, this paper offers an electronic intelligent power card to get the generated electric power in the useful form in different vehicle electrical circuits. For the covering abstract see ITRD E122482.

Research paper thumbnail of Optimal Real-time implementation of fuzzy logic control strategy for performance enhancement of autonomous microgrids

International Journal of Electrical Power & Energy Systems, Sep 1, 2023

Research paper thumbnail of Contribution of Nanostructures in High Performance Solar Cells

Journal of Electronic Materials, Aug 1, 2017

Nanotechnology has great contributions in various fields, especially in solar energy conversion t... more Nanotechnology has great contributions in various fields, especially in solar energy conversion through solar cells (SCs). Nanostructured SCs can provide high performance with lower fabrication costs. The transition from fossil fuel energy to renewable sustainable energy represents a major technological challenge for the world. In the last years, the industry of SCs has grown rapidly due to strong attention in renewable energy in order to handle the problem of global climate change that is now believed to occur due to use of the fossil fuels. Cost is an influential factor in the eventual success of any solar technology, since inexpensive SCs are needed to produce electricity, especially for rural areas and for third world countries. Therefore, new developments in nanotechnology may open the door for the production of inexpensive and more efficient SCs by reducing the manufacturing costs of SCs. Utilizing nanotechnology in cheaper SCs will help maintain the environment. This article covers a review of the progress that has been made to-date to enhance efficiencies of various nanostructures used in SCs, including utilizations of all the wavelengths present in of the solar spectrum.

Research paper thumbnail of A novel approach of an adaptive neuro-PI vector controller fed induction-motor servo drives

This paper presents a novel approach for a very simple architecture of an induction-motor (IM) se... more This paper presents a novel approach for a very simple architecture of an induction-motor (IM) servo drive using only one single neuron (SN) as an online self-tuning artificial neural network (ANN). The action of this controller is similar to an adaptive PI-controller. The adaptation of the proposed controller is achieved by self-tuning for both weight and bias of the SN. Also, using an adaptive learning rate insures adaptation to overcome uncertainty and nonlinearity of the plant. Based on an indirect field-oriented vector control algorithm, the ANN speed tracking controller is developed and integrated with the adaptive hysteresis current-controlled pulse-width modulation (PWM) inverter to offer a high performance IM-drive. The complete drive system is implemented in a real time using a digital signal processor (DSP) controller board DS1102 on a laboratory 1-hp IM. Using the experimental rig, the performance of the proposed drive is evaluated under various speed trajectories. The test results validate the efficacy of the proposed simple controller for precise speed and position tracking of IM drive. Furthermore, the use of SN makes the drive system robust, accurate, and insensitive to parameter variations. Also, the controller contributes towards time consumption reduction through the real-time DSP control algorithm.

Research paper thumbnail of Bacteria-foraging based-control of high-performance railway level-crossing safety drives fed from photovoltaic array

Journal of Electrical Systems and Information Technology, Dec 1, 2016

In the past ten years, railway level-crossing accidents have noticeably escalated in an indisputa... more In the past ten years, railway level-crossing accidents have noticeably escalated in an indisputably preposterous manner, this devastating snag opened the floodgates for the frustrating death of a numerous number of the third world's citizens, especially in Egypt. To tackle with this problem, a fully intelligent control system is required, which must be automated without human intervention. So, in this research, a new proposed level-crossing tracking system is designed and introduced. The system comprises a high-performance induction motor (IM) fed from photovoltaic (PV) array, the boom barrier (gate) with its mechanism-as a loadbuck-boost converter, inverter, and two smart PI-controllers. The first one is designed to regulate the duty cycle of the converter to its optimum value required to balance between maximum power point tracking (MPPT) and keeping dc-link voltage of the inverter at a minimum level needed to maintain the motor internal torque at rated value. The second PI-controller is designed for speed control of indirect field-oriented vector-control (IFO-VC) IM. The proposed design problems of MPPT, dc-link voltage and speed controllers are solved as optimization problems by bacteria-foraging optimization (BFO) algorithm to search for the optimal PI-parameters. The simulation test results are acquired when using the battery-less PV-array with and without the proposed controllers. Also, results are obtained when applying several prescribed speed trajectories to test the robustness against PV-irradiance fluctuations and motordynamic disturbances. From these results, the proposed intelligent controllers are robust compared to classical Ziegler-Nichols (ZN) PI-controllers and also when the motor is directly fed from PV generator without converter.

Research paper thumbnail of Fault analysis of current-controlled PWM-inverter fed induction-motor drives

In this paper, the fault-tolerance capability of IM-drive is studied. The discussion on the fault... more In this paper, the fault-tolerance capability of IM-drive is studied. The discussion on the fault-tolerance of IM drives in the literature has mostly been on the conceptual level without any detailed analysis. Most of studies are only achieved experimentally. This paper provides an analytical tool to quickly analyze and predict the performance under fault conditions. Also, most of the presented results were machine specific and not general enough to be applicable as an evaluation tool. So, this paper will present a generalized method for predicting the post-fault performance of IM-drives after identifying the various faults that can occur. The fault analysis for IM in the motoring mode will be presented in this paper. The paper includes an analysis for different classifications of drive faults. The faults in an IM-drive -that will be studied- can be broadly classified as: machine fault, (i.e., one of stator windings is open or short, multiple phase open or short, bearings, and rotor bar is broken) and inverter-converter faults (i.e., phase switch open or short, multiple phase fault, and DC-link voltage drop). Briefly, a general-purpose software package for variety of IM-drive faults -is introduced. This package is very important in IM-fault diagnosis and detection using artificial intelligent techniques, wavelet and signal processing.

Research paper thumbnail of A general software package for modelling a contact-less electric-vehicles battery-charging public-station fed from on-grid photo-voltaic array

Journal of Electrical Systems and Information Technology, Dec 1, 2018

Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In ... more Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In addition, there is no noise through operation. However, up to now, there are some challenges that facing its spread through all over the world. The main problem that these vehicles face is the fast charging process of the used batteries through neat and clean source without plugs. So, this chapter deals with a proposed method for a contactless battery charger of both electric and hybrid electric vehicles (HEVs) from renewable resources. The chapter proposes a public station for fast charging. This station implies off-board battery charger fed from on-grid (OG) photovoltaic (PV) arrays through inductively power transfer (IPT). This comfortable 100 kW contactless power station is designed, modeled, and simulated as a general software package reliable to be used for any other station design. The air gap of the air-core transformer (ACT) divides the station into two parts. The first part implies roof-mounted PV array with its intelligent-controlled maximum power point tracking (MPPT) technique, power converter, three-level power inverter, and resonant compensator converter that operates at high frequency. The second one includes rectifiers and switched mode power converter with smart controller. The chapter includes samples for simulation results that are obtained from the Matlab software package.

Research paper thumbnail of Particle-Swarm Optimization Control of Active-Power Filter for Harmonic Mitigation of Hybrid Electric-Unbalanced Traction-System

Using of un-symmetrical solid-state control loads leads to huge amount of harmonics fed to the ba... more Using of un-symmetrical solid-state control loads leads to huge amount of harmonics fed to the balanced three-phase systems. Dependently, the harmonics cause many problems with un-balanced and distorted supply waveforms. In this paper, three-phase 3-wire balanced source energizes a hybrid electric-unbalanced traction system that fed from two independent rectified single-phase supplies. Both trains are fed from a balanced three-phase 3-wire supply via V/V transformer. A proposed shunt active power filter (SAPF) is introduced to mitigate most of the harmonics and rebalance the supply. Intelligent PI-controller is used with self-tuning to regulate the voltage of the DC-link for the proposed filter. This smart controller and its parameters is tuned and optimized by using intelligent technique with the particle swarm optimization (PSO). PSO is one of the most prevailing methods to solve the non-linear optimization problems. Also, the system includes a hysteresis current regulator for generating the IGBT-triggering pulses of the inverter. The proposed system is designed, simulated and implemented with the help of the Matlab/Simulink software package. The test results are obtained and compared with and without optimization technique. With optimized algorithm, the total harmonic distortion (THD) is minimized; restoring the balance of the system, and the power factor of the supply is improved to unity. However, those results demonstrate that the proposed system is robust to non-linearity and more suitable for harmonic mitigation in electric traction.

Research paper thumbnail of Neuro-controller for high performance induction motor drives in robots

... Drives in Robots FI Ahmed A. M. Zaki E. A. Ebrahirrt E-mail:fismnil~alh~il -eng.cair.o.erm.eg... more ... Drives in Robots FI Ahmed A. M. Zaki E. A. Ebrahirrt E-mail:fismnil~alh~il -eng.cair.o.erm.eg ... 504-5 IO. [3J H. Hashimoto, K. Maruyama, and F. Harashima, A microprocessor-based robot manipulator control with sliding mode, IEEE Transactions on Industrial Electronics, Vol. ...

Research paper thumbnail of Real‐time implementation and evaluation of gorilla troops optimization‐based control strategy for autonomous microgrids

Iet Renewable Power Generation, Aug 1, 2022

Research paper thumbnail of Harmonic Compensation Using On-Line Bacterial Foraging Optimization Based Three-Phase Active Power Filter

The active power filter has gained much more attention because of its effective performance to mi... more The active power filter has gained much more attention because of its effective performance to mitigate the harmonics. This paper presents shunt active power filter (SAPF) controlled by PI controller to compensate the harmonics. Also, it introduces a new artificial intelligent technique called Bacterial Foraging Optimization to optimize the parameters of the PI-controller through on-line self-adaptive self-tuning algorithm. This robust control scheme of the system makes improvement in the behavior of the active filter to eliminate the harmonic currents which occurred by the nonlinear loads in the electric grid. The hysteresis nonlinear current control method is used to generate the pulse gate required to drive PWM current-controlled voltage-source inverter of SAPF. Matlab/Simulink software package is used as a simulation to test and simulate the proposed system. Through the simulation results, it is observed that the response of the PI controller based on-line bacteria foraging optimization is quite satisfactory.

Research paper thumbnail of Real-time advanced sensorless control of axial flux synchronous motor

International Journal of Power Electronics and Drive Systems/International Journal of Electrical and Computer Engineering, Sep 1, 2024

Research paper thumbnail of Optimal Design of SAPFs for Harmonic Mitigation of Electric Arc Furnaces with Real-Time Digital Simulation Hardware

Research paper thumbnail of Real-Time Implementation of SAPF-Coupled PV Grid Connected Using Artificial Hummingbird Algorithm for Power-Quality Enhancement

Research paper thumbnail of Dynamic performance enhancement of nonlinear AWS wave energy systems based on optimal super-twisting control strategy

Ain Shams Engineering Journal/Ain Shams Engineering Journal, May 1, 2024

Research paper thumbnail of Optimal super twisting sliding mode control strategy for performance improvement of islanded microgrids: Validation and real-time study

International journal of electrical power & energy systems, Jun 1, 2024

Research paper thumbnail of Real-Time Implementation for the Robust Controller of the Switched Boost Inverter within an Autonomous Modified Nanogrid

International Journal of Electrical Engineering and Computer Science, Jan 15, 2024

SBI stands for switched-boost inverter and is a single-stage power converter used to connect low-... more SBI stands for switched-boost inverter and is a single-stage power converter used to connect low-power sources, such as solar photovoltaic (PV) arrays within a modified nanogrid, to loads. Despite its many benefits, such as the fact that it does not require expensive sophisticated dead-time circuitry, its duty ratio is limited to between 0 and 0.5. As a result, this publication is a contribution towards improving the SBI's performance for use in a modified nanogrid. Furthermore, it also presents a revolutionary strategy for a simple closed-loop control technique that overcomes the majority of inverter shortcomings and system nonlinearity. The suggested robust controller uses a metaheuristic optimization technique, called gorilla troops optimization (GTO), to optimize the performance of this controller. The robustness of the suggested controller is tested against the sudden change of the nanogrid input voltage (i.e., PV-voltage), modulation index of the inverter, and the step-change in DC-link output voltage of the inverter. The test results obtained from Matlab/Simulink software are compared with particle swarm optimization (PSO)-as another optimization algorithm. Furthermore, the proposed system is experimentally implemented with OPAL RT-4510v real-time hardware in the loop (HIL), rapid control prototyping, OP-8660 HIL controller and data acquisition platform.

Research paper thumbnail of Real-Time Implementation of BLDC Motor-Based Intelligent Tracking Control Fed from PV-Array for E-Bike Applications

WSEAS TRANSACTIONS ON POWER SYSTEMS

The essential goal of this research is designing and modeling a speed and position tracking syste... more The essential goal of this research is designing and modeling a speed and position tracking system for driving an electric bike (e-bike) motordrive. This motor is a brushless DC (BLDC) motor as a high-performance drive. It is supplied from twin electric sources to drive it and charge the storage elements (i.e., batteries, super-capacitors, etc.). The first one is a renewable, neat, and clean source photovoltaic (PV) module and the second one is a pedal generator driven by the rider. The submitted design of the controllers is optimized to improve the system’s dynamic stability. The artificial bee colony (ABC) as an artificial intelligent (AI) algorithm is suggested for searching the optimal gains of the proposed proportional-integral-derivative (PID) controllers by reducing the error of its fitness function. The system behavior is studied with that controller when directly feeding from the PV array with and without batteries. The response of the proposed technique - against dynamic t...

Research paper thumbnail of Hardware in the Loop-Based Testing of Three Schemes for Mitigation the Effect of Unsymmetrical Grid Faults on DFIG

WSEAS TRANSACTIONS ON POWER SYSTEMS

This paper presents three-proposed schemes to mitigate the effect of unsymmetrical voltage sag fa... more This paper presents three-proposed schemes to mitigate the effect of unsymmetrical voltage sag fault on a wind-driven grid-connected Double Fed Induction Generator (DFIG). The first tested scheme comprises a static compensator (STATCOM) connected to the DFIG stator, while a three-phase parallel RL external impedance is connected to the rotor circuit in the second scheme. The STATCOM and the added rotor impedance are connected simultaneously in the third scheme. The effect of applying the three schemes on the responses of the stator and rotor voltages and currents, the dc-link voltage and current, the electrical torque, and the rotor speed during an unsymmetrical voltage sag are presented and compared at sub-and super-synchronous speeds. All systems were emulated, implemented, and tested through an OPAL RT-4510 Digital Real-Time Simulator (DRTS) in a Hardware-In-the-Loop (HIL) application. The internal Field-Programmable Gate Array (FPGA) chip assisted in using this platform as a Rap...

Research paper thumbnail of Modeling of a Contact-Less Electric-Vehicle Battery-Charging Station Fed from On-Grid Photovoltic Arrays

IntechOpen eBooks, Dec 18, 2019

Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In ... more Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In addition, there is no noise through operation. However, up to now, there are some challenges that facing its spread through all over the world. The main problem that these vehicles face is the fast charging process of the used batteries through neat and clean source without plugs. So, this chapter deals with a proposed method for a contactless battery charger of both electric and hybrid electric vehicles (HEVs) from renewable resources. The chapter proposes a public station for fast charging. This station implies off-board battery charger fed from on-grid (OG) photovoltaic (PV) arrays through inductively power transfer (IPT). This comfortable 100 kW contactless power station is designed, modeled, and simulated as a general software package reliable to be used for any other station design. The air gap of the air-core transformer (ACT) divides the station into two parts. The first part implies roof-mounted PV array with its intelligent-controlled maximum power point tracking (MPPT) technique, power converter, three-level power inverter, and resonant compensator converter that operates at high frequency. The second one includes rectifiers and switched mode power converter with smart controller. The chapter includes samples for simulation results that are obtained from the Matlab software package.

Research paper thumbnail of Electric-Power Recovery for the Mechanical Damper in a Vehicle-Suspension System Using Artificial Intelligent Control

Vehicle System Dynamics, 2004

The suspension elements must be mounted between the vehicle body and wheel axle to minimize undes... more The suspension elements must be mounted between the vehicle body and wheel axle to minimize undesirable shake for passengers. Parts of mechanical shake energy are transferred to heat energy by such mechanical damper elements in the vehicle-suspension system. So, the new part of this paper is how to utilize or recover this dissipated energy as electrical energy instead of heat energy. So, a new suggested suspension system will be introduced. In this proposed technique, an electric linear generator is used as an electrical damper in parallel to the spring instead of the mechanical damper element to recover this dissipated power. This generator is exposed to dynamic forces as equal as to the mechanical damper through the minimised shake. Dependently, the generator transfers undesirable randomly mechanical shake energy in the suspension systems to electric power instead of heat energy due to friction. But, the main problem here is the randomization of such generated power. So, this paper offers an electronic intelligent power card to get the generated electric power in the useful form in different vehicle electrical circuits. For the covering abstract see ITRD E122482.

Research paper thumbnail of Optimal Real-time implementation of fuzzy logic control strategy for performance enhancement of autonomous microgrids

International Journal of Electrical Power & Energy Systems, Sep 1, 2023

Research paper thumbnail of Contribution of Nanostructures in High Performance Solar Cells

Journal of Electronic Materials, Aug 1, 2017

Nanotechnology has great contributions in various fields, especially in solar energy conversion t... more Nanotechnology has great contributions in various fields, especially in solar energy conversion through solar cells (SCs). Nanostructured SCs can provide high performance with lower fabrication costs. The transition from fossil fuel energy to renewable sustainable energy represents a major technological challenge for the world. In the last years, the industry of SCs has grown rapidly due to strong attention in renewable energy in order to handle the problem of global climate change that is now believed to occur due to use of the fossil fuels. Cost is an influential factor in the eventual success of any solar technology, since inexpensive SCs are needed to produce electricity, especially for rural areas and for third world countries. Therefore, new developments in nanotechnology may open the door for the production of inexpensive and more efficient SCs by reducing the manufacturing costs of SCs. Utilizing nanotechnology in cheaper SCs will help maintain the environment. This article covers a review of the progress that has been made to-date to enhance efficiencies of various nanostructures used in SCs, including utilizations of all the wavelengths present in of the solar spectrum.

Research paper thumbnail of A novel approach of an adaptive neuro-PI vector controller fed induction-motor servo drives

This paper presents a novel approach for a very simple architecture of an induction-motor (IM) se... more This paper presents a novel approach for a very simple architecture of an induction-motor (IM) servo drive using only one single neuron (SN) as an online self-tuning artificial neural network (ANN). The action of this controller is similar to an adaptive PI-controller. The adaptation of the proposed controller is achieved by self-tuning for both weight and bias of the SN. Also, using an adaptive learning rate insures adaptation to overcome uncertainty and nonlinearity of the plant. Based on an indirect field-oriented vector control algorithm, the ANN speed tracking controller is developed and integrated with the adaptive hysteresis current-controlled pulse-width modulation (PWM) inverter to offer a high performance IM-drive. The complete drive system is implemented in a real time using a digital signal processor (DSP) controller board DS1102 on a laboratory 1-hp IM. Using the experimental rig, the performance of the proposed drive is evaluated under various speed trajectories. The test results validate the efficacy of the proposed simple controller for precise speed and position tracking of IM drive. Furthermore, the use of SN makes the drive system robust, accurate, and insensitive to parameter variations. Also, the controller contributes towards time consumption reduction through the real-time DSP control algorithm.

Research paper thumbnail of Bacteria-foraging based-control of high-performance railway level-crossing safety drives fed from photovoltaic array

Journal of Electrical Systems and Information Technology, Dec 1, 2016

In the past ten years, railway level-crossing accidents have noticeably escalated in an indisputa... more In the past ten years, railway level-crossing accidents have noticeably escalated in an indisputably preposterous manner, this devastating snag opened the floodgates for the frustrating death of a numerous number of the third world's citizens, especially in Egypt. To tackle with this problem, a fully intelligent control system is required, which must be automated without human intervention. So, in this research, a new proposed level-crossing tracking system is designed and introduced. The system comprises a high-performance induction motor (IM) fed from photovoltaic (PV) array, the boom barrier (gate) with its mechanism-as a loadbuck-boost converter, inverter, and two smart PI-controllers. The first one is designed to regulate the duty cycle of the converter to its optimum value required to balance between maximum power point tracking (MPPT) and keeping dc-link voltage of the inverter at a minimum level needed to maintain the motor internal torque at rated value. The second PI-controller is designed for speed control of indirect field-oriented vector-control (IFO-VC) IM. The proposed design problems of MPPT, dc-link voltage and speed controllers are solved as optimization problems by bacteria-foraging optimization (BFO) algorithm to search for the optimal PI-parameters. The simulation test results are acquired when using the battery-less PV-array with and without the proposed controllers. Also, results are obtained when applying several prescribed speed trajectories to test the robustness against PV-irradiance fluctuations and motordynamic disturbances. From these results, the proposed intelligent controllers are robust compared to classical Ziegler-Nichols (ZN) PI-controllers and also when the motor is directly fed from PV generator without converter.

Research paper thumbnail of Fault analysis of current-controlled PWM-inverter fed induction-motor drives

In this paper, the fault-tolerance capability of IM-drive is studied. The discussion on the fault... more In this paper, the fault-tolerance capability of IM-drive is studied. The discussion on the fault-tolerance of IM drives in the literature has mostly been on the conceptual level without any detailed analysis. Most of studies are only achieved experimentally. This paper provides an analytical tool to quickly analyze and predict the performance under fault conditions. Also, most of the presented results were machine specific and not general enough to be applicable as an evaluation tool. So, this paper will present a generalized method for predicting the post-fault performance of IM-drives after identifying the various faults that can occur. The fault analysis for IM in the motoring mode will be presented in this paper. The paper includes an analysis for different classifications of drive faults. The faults in an IM-drive -that will be studied- can be broadly classified as: machine fault, (i.e., one of stator windings is open or short, multiple phase open or short, bearings, and rotor bar is broken) and inverter-converter faults (i.e., phase switch open or short, multiple phase fault, and DC-link voltage drop). Briefly, a general-purpose software package for variety of IM-drive faults -is introduced. This package is very important in IM-fault diagnosis and detection using artificial intelligent techniques, wavelet and signal processing.

Research paper thumbnail of A general software package for modelling a contact-less electric-vehicles battery-charging public-station fed from on-grid photo-voltaic array

Journal of Electrical Systems and Information Technology, Dec 1, 2018

Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In ... more Electric vehicles (EVs) are environmental friendly due to no exhaust gases or carbon dioxide. In addition, there is no noise through operation. However, up to now, there are some challenges that facing its spread through all over the world. The main problem that these vehicles face is the fast charging process of the used batteries through neat and clean source without plugs. So, this chapter deals with a proposed method for a contactless battery charger of both electric and hybrid electric vehicles (HEVs) from renewable resources. The chapter proposes a public station for fast charging. This station implies off-board battery charger fed from on-grid (OG) photovoltaic (PV) arrays through inductively power transfer (IPT). This comfortable 100 kW contactless power station is designed, modeled, and simulated as a general software package reliable to be used for any other station design. The air gap of the air-core transformer (ACT) divides the station into two parts. The first part implies roof-mounted PV array with its intelligent-controlled maximum power point tracking (MPPT) technique, power converter, three-level power inverter, and resonant compensator converter that operates at high frequency. The second one includes rectifiers and switched mode power converter with smart controller. The chapter includes samples for simulation results that are obtained from the Matlab software package.

Research paper thumbnail of Particle-Swarm Optimization Control of Active-Power Filter for Harmonic Mitigation of Hybrid Electric-Unbalanced Traction-System

Using of un-symmetrical solid-state control loads leads to huge amount of harmonics fed to the ba... more Using of un-symmetrical solid-state control loads leads to huge amount of harmonics fed to the balanced three-phase systems. Dependently, the harmonics cause many problems with un-balanced and distorted supply waveforms. In this paper, three-phase 3-wire balanced source energizes a hybrid electric-unbalanced traction system that fed from two independent rectified single-phase supplies. Both trains are fed from a balanced three-phase 3-wire supply via V/V transformer. A proposed shunt active power filter (SAPF) is introduced to mitigate most of the harmonics and rebalance the supply. Intelligent PI-controller is used with self-tuning to regulate the voltage of the DC-link for the proposed filter. This smart controller and its parameters is tuned and optimized by using intelligent technique with the particle swarm optimization (PSO). PSO is one of the most prevailing methods to solve the non-linear optimization problems. Also, the system includes a hysteresis current regulator for generating the IGBT-triggering pulses of the inverter. The proposed system is designed, simulated and implemented with the help of the Matlab/Simulink software package. The test results are obtained and compared with and without optimization technique. With optimized algorithm, the total harmonic distortion (THD) is minimized; restoring the balance of the system, and the power factor of the supply is improved to unity. However, those results demonstrate that the proposed system is robust to non-linearity and more suitable for harmonic mitigation in electric traction.

Research paper thumbnail of Neuro-controller for high performance induction motor drives in robots

... Drives in Robots FI Ahmed A. M. Zaki E. A. Ebrahirrt E-mail:fismnil~alh~il -eng.cair.o.erm.eg... more ... Drives in Robots FI Ahmed A. M. Zaki E. A. Ebrahirrt E-mail:fismnil~alh~il -eng.cair.o.erm.eg ... 504-5 IO. [3J H. Hashimoto, K. Maruyama, and F. Harashima, A microprocessor-based robot manipulator control with sliding mode, IEEE Transactions on Industrial Electronics, Vol. ...

Research paper thumbnail of Real‐time implementation and evaluation of gorilla troops optimization‐based control strategy for autonomous microgrids

Iet Renewable Power Generation, Aug 1, 2022

Research paper thumbnail of Harmonic Compensation Using On-Line Bacterial Foraging Optimization Based Three-Phase Active Power Filter

The active power filter has gained much more attention because of its effective performance to mi... more The active power filter has gained much more attention because of its effective performance to mitigate the harmonics. This paper presents shunt active power filter (SAPF) controlled by PI controller to compensate the harmonics. Also, it introduces a new artificial intelligent technique called Bacterial Foraging Optimization to optimize the parameters of the PI-controller through on-line self-adaptive self-tuning algorithm. This robust control scheme of the system makes improvement in the behavior of the active filter to eliminate the harmonic currents which occurred by the nonlinear loads in the electric grid. The hysteresis nonlinear current control method is used to generate the pulse gate required to drive PWM current-controlled voltage-source inverter of SAPF. Matlab/Simulink software package is used as a simulation to test and simulate the proposed system. Through the simulation results, it is observed that the response of the PI controller based on-line bacteria foraging optimization is quite satisfactory.