Mohammed Khalid

Year: 2025

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: In Progress

Master research, Optimization of permanent magnet characteristics based on different rotor topologies

Hiba E. Aziz

Year: 2023

Academic Degree: Master

Supervisor Type: Co-supervisor

Supervisor State: Graduated

Master thesis (research), optimization of induction machines caracteristics

Technical B.Sc

Sep 15, 2001 - May 20, 2005

Electrical Power Engineering Techniques

Technical M.Sc

Sep 15, 2007 - Oct 20, 2010

Electrical Power Engineering Techniques

Ph.D

Oct 13, 2013 - Jun 10, 2019

Design of Electrical Machines

CDC [Director of Career Development ceneter]

Jul 1, 2020 - Present

graduate internships programs, entrepreneurship programs, summer training, Soft and hard skills training workshops, scientific and techncial competitions for student and graduates, invocation labs. programs

Intelligent Predictive Maintenance for Urban Energy and Transportation Systems: A Hybrid AI Approach

Apr 6, 2025

Journal NTU Journal of Renewable Energy

publisher NTU Journal of Renewable Energy

DOI https://doi.org/10.56286/ntujre.v8i1

Issue 1

Volume 8

oday's complex urban energy and transportation systems demand new maintenance solutions to keep them running properly. This study develops an AI-driven predictive maintenance solution for electrical substations and HEV batteries using data from the Internet of Things sensors. Our framework uses machine-learning methods such as Bi-LSTM, GRU, and GBT models to spot system weaknesses with higher accuracy. Based on test results Bi-LSTM proved better than other models by achieving a 91% F1 score alongside 4.3% Mean Absolute Error across predictions and anomaly detection. According to the results, the proposed framework lowered maintenance costs by half and proved better than traditional and recent methods. The proposed system combines insights from power substations and develops edge-cloud technologies to better use EV batteries. Real-world systems data validate those reductions in downtime happen together with better system reliability. This system now works in cities, tracks vehicle fleets, and supports smart city construction. The predictive system framework delivers exceptional energy and mobility management while remaining affordable and expandable for future urban infrastructure solutions.

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Performance improvement of squirrel cage induction motor: A review paper

Aug 19, 2024

Journal AIP Conference Proceedings

publisher AIP Publishing

DOI https://doi.org/10.1063/5.0212317

Issue 1

Volume 3105

Nowadays, induction machines can be considered the backbone of various industrial applications due to the many characteristics such as rigidity, simplicity, high reliability, and low maintenance that can be manufactured for a long time. However, poor efficiency and power factor and increased amounts of torque ripple and losses significantly impact the performance and hence its efficiency. Therefore, in order to improve the performance of induction machines, the special design topology for stator and rotor configurations must be investigated and correctly estimated. This paper presents the analysis of the variable geometries of the cage's rotating bars. More specifically, the influence of dimensions and positions, as well as the shapes of the rotor rods, have a significant impact on the dynamic performance (developed torque, starting torque, ripple torque, starting current, power factor, harmonics, output power

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Characteristic optimization of three-phase induction motors based on FEM

Jan 6, 2024

Journal Al-Qadisiyah Journal for Engineering Sciences

publisher Al-Qadisiyah Journal for Engineering Sciences

DOI 10.30772/qjes.2024.147485.1153

Issue 3

Volume 17

nduction motors (IMs) with varying torque-speed characteristics are widely employed in various industrial applications. However, designing an efficient induction motor requires some of the main parameters of the motor (torque, speed, and efficacy) to beinvestigated and optimized. Furthermore, due to the significant influence of the rotor slot configurations on the electromagnetic torque-speed envelope, a design optimization procedure is required to optimize the induction motor's dynamic characteristics. In this paper, the impact of rotor slots’ geometrical modifications on the behavior of 3-phase, four poles, 36 slots, and double-layer squirrel cage IM are presented and considered as examples of optimization. Moreover, the effect of the air gap dimensionand bore diameter of the stator and rotor parts are investigated. The predicted results demonstrate that the constructed geometry of the rotor slots has an observable effect on the performance of an (IM).

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Effect of rotor bars position on the performance of cage rotor induction motor using finite element method

Dec 15, 2023

Journal 1ST INTERNATIONAL CONFERENCE ON SUSTAINABLE DEVELOPMENT TECHNIQUES (ICSDT2022)

publisher AIP Publishing

DOI doi.org/10.1063/5.0172403

Issue 1

Volume 2862

Squirrel cage induction motor (SCIM) plays an important role in industrial applications thanks to its hardness, durability, and ease of design. With all these advantage researches are still being conducted to improve the performance of the induction motor because it suffers from problems such as low power factor as well as ripple torque and low efficiency. the main objective of this paper is to discuss the increasing of the starting torque and decreasing the ripple torque as well as increasing the efficiency of the squirrel cage induction motor based on specific methodologies carried out on the rotor bar by changing its position in the horizontal and vertical direction as well as implementing the skewing effect on rotor bar and analyzing the impact of each of these changes on the performance and efficiency by using finite element method (FEM).

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Optimization of Induction Motor Rotor Bar Geometry Based on Genetic Algorithm

Jun 21, 2023

Journal 2023 International Conference on Engineering, Science and Advanced Technology (ICESAT)

publisher IEEE

DOI DOI: 10.1109/ICESAT58213.2023.10347297

Issue Pages 127-132

This paper presents a systematic optimal design algorithm for the shape of the rotor slot to get optimal operating torque and efficiency in a three-phase squirrel cage induction motor (SCIM). The determination of the ideal dimensions of the rotor bar is carried out with a multi-objective genetic algorithm (MOGA). The primary purpose is to enhance induction motors' performance and verify the predicted results with analytical calculations. Maxwell Ansys 2D has implemented the parametrical method for modeling the SCIM, and the result shows an increasing ratio of the starting torque by (22.35 % ), as well as the efficiency by (6.67%) and a reducing ripple torque by (34.68%).

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IOT Platform for Vital Signs Detection Using Node Microcontroller

May 2, 2023

Journal IEM Journal

publisher Journal – The Institution of Engineers, Malaysia

Issue 1

Volume 83

It is possibly possible to stop the spread of the coronavirus by utilizing IoT technology to monitor the vital signs of patients. As a consequence, a proposal has been developed for an efficient and affordable remote monitoring system that measures vital signs. This system makes use of a temperature sensor, a dual heart rate and oxygen level sensor, a temperature sensor, two microcontrollers, a UNO as a power supply, and a Node as the main controller. The vital signs are monitored in a non-invasive manner using photoplethysmography technique, and the information is transmitted wirelessly to the individual involved via the Blynk platform, making use of a Wi-Fi device. It also demonstrates how the system can connect to the internet anywhere in the world, which enables its utilization in a variety of clinical trials.

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Study the dynamic performance of PM machines for different rotor topologies

Dec 1, 2022

Journal International Journal of Power Electronics and Drive Systems

publisher IAES Institute of Advanced Engineering and Science

DOI DOI: 10.11591/ijpeds.v13.i4.pp2062-2070

Issue 4

Volume 13

For hybrid and electric vehicle drive-train (automotive applications) achieving high torque and efficiency at a wide range of operating conditions can be considered an important matter. Therefore, precise structure optimization of the permanent magnet synchronous machines (PMSMs) is recommended. Consequently, the effect of the main leading design parameters (such as PM arrangement, magnet thickness, pole arc to pole pitch ratio, airgap length as well as the effect of shaft material) for a different number of rotor poles configuration of PMSM can achieve optimum design results in electric motors with economical cost and excellent performance. This paper submits a comparative analysis of different rotor topologies of (PMSM). Moreover, the dynamic performances of the suggested rotor geometry topologies are investigated based on investigation of finite element analysis (FEA). The analysis offers a piece of complete information about the magnetic flux distribution and magnetic flux density over the motor geometry. Gained results from the analysis are used to give a decision for the selection of a suitable PMSM design.

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A comparative study for the performance operation of electric machine based on conventional and DQ theories

Sep 1, 2021

Journal International Journal of Power Electronics and Drive Systems

publisher IAES Institute of Advanced Engineering and Science

DOI 10.11591/ijpeds.v12.i3.pp1304-1314

Issue 3

Volume 12

Induction motors are used widely in industrial applications, thanks to their high efficiency and reliability which nominates it as a good machine used in various application. Based on the application and accuracy, modeling processes of electric machines are carried out using different mathematical methods. The most common method for modeling electrical machines is based on solution of differential equations of voltages as well as calculating the time varying self-inductances and the mutual inductances based on the rotor angle. One of the most important features of this method is that the inductance is no long depend on the time varying voltage, which is the major problem facing the conventional model. But the DQ modeling approach has several problems, the greatest of which is that the voltage applied on stator must be balanced in addition to the fact that the winding are sinusoidal distributed form. Herein this research is focused on build two models of a 3-Φ induction motor (IM) based on the two analytical approaches and compare them to clarify the difference. The results have been shown that the conventional model gives more accurate response when it is applied in both normal and upnormal operation. MATLAB/Simulink softare is used to construct the DQ and classical abc IM models.

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PLC Based Overcurrent Protection of Three-phase Transmission Line

Sep 9, 2020

Journal MDC-SDSP 2020: Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 202

publisher European Alliance for Innovation

DOI DOI 10.4108/eai.28-6-2020.2298248

Issue Page 284

As the Transmission Line (TL) is an important part in the power system; this paper presents the design and practical implementation of overcurrent protection for threephase TL system using Programmable Logic Control (PLC). The PLC then on-line monitring the vlaue of the load current in each phase and detect the overcurrent and simaltinouslly isolate the fault by sending an output signal for tripping the coil of the Circuit Breaker (CB). Display unit of the PLC is used for displaying the load current, in addition to alert maessage with the type of the occoured fault. The proposed contrroller program also cancel of the trip signal of the CB during a definite time of the inrush and stating load current. In addition, an automatic reclosing system for return the CB to the work when the overcurrent is released. PLC-based protection methods cost less, provides greater precision with a safe way of operation when compared with the other protection controllers system. Function Block Diagram (FBD) language is employed for implementing the proposed software controller. Simulation is made for the proposed controller via LOGO! Soft Comfort V7. 0 software programs for virtual implantation of the program before downloading to the PLC.

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High-performance ferrite permanent magnet brushless machines

Mar 28, 2019

Journal IEEE Transactions on Magnetics

publisher IEEE

DOI 10.1109/TMAG.2019.2900561

Issue 7

Volume 55

The performance of a brushless permanent magnet machine topology equipped with axially and circumferentially magnetized ferrite permanent magnets is presented. Simulation studies show that for smaller ratios of axial length to active length, air-gap flux densities in excess of 1 T can be achieved, resulting in significant improvements in torque production and efficiency. A prototype machine is manufactured, and test results confirm the predictions of the EMF and the static torque.

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