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Iraqi Journal of Applied Physics

المجلة العراقية للفيزياء التطبيقية

ISSN: 18132065 23091673
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, Computers Networks and Applications.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
Email: editor_ijap@yahoo.co.uk

Table of content: 2012 volume:8 issue:3

Article
Influence of Magnetic Saturation on Sensorless Rotor Position Estimation in IPMSM Drives Based on HIL Simulator

Authors: E.H. Ibrahem --- H.M. Dawood
Pages: 3-9
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Abstract

The paper presents an investigation of field oriented control strategy of Permanent Magnet Synchronous Motor (PMSM) based on hardware in the loop simulation (HIL) over a wide speed range. A sensorless rotor position estimation using sliding mode observer for permanent magnet synchronous motor is illustrated considering the effects of magnetic saturation between the d and q axes. The cross saturation between d and q axes has been calculated by finite-element analysis. Therefore, the inductance measurement regards the saturation and cross saturation which are used to obtain the suitable id-characteristics in base and flux weakening regions. Real time matrix multiplication in Field Programmable Gate Array (FPGA) using floating point number system is used utilizing Quartus-II environment to develop FPGA designs and then download these designs files into development kit. dSPACE DS1103 is utilized for Pulse Width Modulation (PWM) switching and the controller. The hardware in the loop results conducted to that from the Matlab simulation. Various dynamic conditions have been investigated.


Article
Application of Hydrotropic Solubilization Phenomenon for Estimating Diacerein in Capsule Dosage Form by Spectrophotometry Methods

Authors: U.S. Bagel --- V. Dheman
Pages: 17-23
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Abstract

To develop two safe, eco-friendly, sensitive and accurate UV-spectrophotometric methods by applying hydrotropic solubilization phenomenon for the estimation of diacerein in capsule dosage form. Preliminary solubility studies of drug, selection of hydrotrope, UV spectral studies, Optimization of hydrotrope, direct spectrophotometric and derivative method development, validation of proposed methods were performed as per ICH guidelines. Application of developed method on marketed formulation. The aqueous solubility of diacerein was increased by more than 270 folds by using 8M urea solution as hydrotropic agent in comparison to solubility in distilled water. The sample obeys the Beer’s law in the concentration range of 1-15 µg/ml and 2-45 µg/ml with correlation coefficient of 0.9994 & 0.9997 for each method respectively. The accuracy was proved by recovery studies with mean recovery of 99.80 % and 99.08 % for each method respectively.


Article
Characterization of Commercial Al-Si Casting Alloys Reinforced with Nano SiC Composites

Authors: A. Mazhery --- M.O. Shabni
Pages: 25-30
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Abstract

This paper is aimed at studying the microstructure and mechanical properties of nano composites, processed via stir casting. The composites are based on the A356 aluminum alloy, reinforced with nano-SiC particles. The density measurements showed that the samples contained little porosity, and the amount of porosity in the composites increased with increasing volume fraction. The microstructures of composites were examined using optical microscopy (OM) and transmission electron microscopy (TEM).


Article
Effect of Transverse Magnetic Field on Laser Beam Width Parameter

Authors: R.A. Khamis
Pages: 31-34
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Abstract

In this work, the variation of plasma and cyclotronic frequencies on nonlinear permittivity 2 has been studied. Two equations of second order has been solved numerically using Runge-Kutta method. Decreasing the minimum beam width parameter is an important issue in some applications such as laser ignitor fusion, laser acceleration and harmonic generation. The effect of applying of magnetic field has been analyzed through the variation of minimum beam width parameter as a function of the cyclotronic frequency. The effect of magnetized plasma is to decrease f0 until it reaches its minimum point then after that point diffraction term becomes dominant.

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