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Article
Different Techniques for Calculating Apparent and Incremental Inductances using Finite Element Method

Author: Amer Mejbel Ali
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2015 Volume: 11 Issue: 2 Pages: 193-201
Publisher: Basrah University جامعة البصرة

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Abstract

This work focuses on using two-dimensional finite element method to calculate apparent and incremental inductances for 40W fluorescent lamp ballast with different loading conditions based on its design documents. Seven inductance calculation techniques are adopted by calculating ballast stored magnetic energy and flux linkage using ANSYS software. The calculated results for apparent inductances show a good agreement with the design and average measured values, while calculated incremental inductances have been verified by noting the behavior of core hysteresis loop experimentally. These seven techniques establish a good base for researchers and designers to obtain an accurate inductance profile for any iron-core inductor.


Article
Estimation of Stator Winding Temperature of a Three-Phase Induction Motor

Authors: Amer Mejbel Ali --- Afrah Thamer Abdullah
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2019 Volume: 19 Issue: 2 Pages: 9-17
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper adopted a thermal network method (TNM) based on Motor-CADwith MATLAB/Simulink software, and finite element method (FEM) based on Motor-CAD with Flux2D software, to estimate the stator winding temperature of a totallyenclosed fan-cooled (TEFC), squirrel cage, three-phase induction motor. The threesoftware packages were adopted successfully with a good agreement among their resultsresulting in preferring using Motor-CAD in obtaining results, and using Flux2D withMATLAB to validate these results. The success of triple-software methodology will givethe induction motor designer a well-validated tool in attaining a safe motor operationwithout exceeding the maximum allowable stator winding temperature rise, and withoutusing an experimental test based on an expensive manufacturing motor.


Article
DESIGN OPTIMIZATION OF A HYBRID HYDRO-WIND MICROPOWER SYSTEM FOR RURAL COMMUNITIES

Authors: Amer Mejbel Ali --- Sameer Saadoon Algburi --- Mohammad Abdelmajed Aljaradin
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 2 (Part-5) Pages: 1-10
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Renewable energies can play an important role to provide electricity to rural communities .This work study the optimum design of a hybrid hydro-wind , micro-power system in rural area . Six case studies, including the impact of hydro head, flow rate, efficiency, and head loss for micro hydropower with wind turbine hub height were implemented based on HOMER software. The simulation results show the importance of using HOMER to assist system designers for assigning the optimum design of hybrid system components

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