DEPARTMENT OF ELECTRICAL ENGINEERING UNIVERSITY OF ENGINEERING & TECHNOLOGY, LAHORE

EE-353 ELECTROMAGNETICS SIMULATION LABORATORY

Electrical Engineering Department University of Engg. & Technology GT-Road, Lahore Paksiatan-54890

Phone: +92-42-9029229 Fax: +92-42-9250224 E-mail: chairmanee@uet.edu.pk Website: www.uet.edu.pk

CONTACT INFORMATION

Magnetic Field Around Current Carrying Conductors

The Electromagnetics Simulation Laboratory focuses on equipping students of Electrical Engineering with the most fundamental and yet most significant simulation tool MATLAB, with particular emphasis laid on its applications to solve problems related to electromagnetics field theory. The lab sessions are designed to explore the power of MATLAB to solve Partial Differential Equations (PDEs) using Finite Element Method (FEM). By solving a number of PDEs including those of Electrostatics, Magnetostatics, Electromagnetics and Conductive Media, students learn how to represent and boundary value problems in MATLAB-Partial Differential Equation Toolbox and concepts like Dirichlet, Neumann and Mixed Boundary Conditions.

OVERVIEW

3-D Plot of Saddle Function

The laboratory experiments are divided into three parts • Simulation using MATLAB M-Files • Simulation using MATLAB-PDETool

• Electrostatics • Magnetostatics • Electrodynamic

• Laboratory Assignments and Projects

LAB PLAN

Electrostatic Simulation of a Parallel Plate Capacotor

The key objectives of these lab sessions are to become familiar with:

• MATLAB environment • Procedure to write functions in MATLAB using M-Files • Vector and matrix operations supported by MATLAB • Plot 2-D graphs and to draw 3-D figures • Plot electric field and potential for given charge configuration • Partial Differential Equation Toolbox in MATLAB • Finite Element Method (FEM) • Electrostatic Simulation of parallel plate capacitor • Electrostatic Simulation of coaxial cable • Electrostatic Simulation of twin-lead transmission line • Electrostatic Simulation of microstrip transmission line • Simulation of Method of Images • Magnetostatic Simulation of electric motor • Time Varying Electromagnetics Simulation and observation of skin effect

KEY OBJECTIVES & EXPERIMENTS

The Current Density Between Two Metallic Conductors

The Adaptively Refined Mesh

EXPERIMENTS-OUTCOME

Equipotential Lines & Magnetic Flux in Two-Pole Motor

Meshing-Finite Element Method

The Current Density in an AC Wire

Equipotential Lines and Electric Field Intensity—Electrostatics

Reference: MATLAB documentation

MAJOR RESEARCH THEMES Research in ESL today is focused on four major themes:

HIGH FREQUENCY MODELLING OF ELECTRICAL MACHINES

The general topic is high frequency modeling of power transformers. The contributions in this work relates to different topics such as; Frequency-dependent iron core representation in FEM, study of interlaminar currents and its effect on the internal magnetic field, characterization of high frequency dielectric properties of impregnated pressboard and service-aged impregnated paper, procedure for evaluation of internal/external overvoltages, and finally sensitivity guidelines for the application of FRA (Frequency Response Analysis) to mechanical deformations.

SCATTERING THEORY APPLICATIONS

Special emphasis is laid on the applications of scattering theory in the field of biomedical imaging. We are investigating the scattering of the Magnetic Resonance Imaging (MRI) radiofrequency (RF) field by implants for Deep Brain Stimulation (DBS) and the resultant heating of the tissue surrounding the DBS electrodes.

COMPUTATIONAL ELECTROMAGNETICS

To develop and improve numerical techniques to solve integral and partial differential equations including Finite Element Method (FEM), Finite Difference in Time Domain (FDTD) and Method of Moments (MOM)

PUBLICATIONS, LOCATION AND FACILITIES

PUBLICATIONS

JOURNAL:

Mri Induced Heating of Deep Brain Stimulation Leads: Effect of the Air-Tissue Interface S. A. Mohsin, N. M. Sheikh, and U. Saeed Progress In Electromagnetics Research, PIER 83, 81-91, 2008.

CONFERENCE:

Interaction of the RF Field with Stent Devices During Diagnostic and Interventional Magnetic Resonance Imaging S. A. Mohsin1, U. Saeed2, J. Nyenhuis1, N. M. Sheikh3 2008 IEEE International Symposium on Antennas and Propagation LOCATION:

Nearly all ESL activities take place at the UET main campus in Lahore, Pakistan. Core ESL research facilities and offices are located in the Electrical Engineering Department. ESL principal investigators also have offices and laboratories in other UET locations, including PCB Laboratory. The associated laboratories are Microwaves Laboratory, TLAP Laboratory and Wireless Communication Laboratory.

FACILITIES:

All ESL associated labs are equipped with Intel Core2Duo desktop computers having softwares including MATLAB, High Frequency Structure Simulator (HFSS) and Advanced Design System (ADS). The testing facilities include Spectrum Analyzer, Vector Network Analyzer, Digital Oscilloscope, Signal Generators and Anechoic Chamber (Under Construction)

SPONSORSHIPS AND COLLABORATIONS

The wide range of ESL research efforts are supported by the most diverse sponsor base at UET. Principal sponsors of ESL research include:

⇒ Higher Education Commission (HEC) of Pakistan

⇒ Pak Elektron Limited (PEL)

⇒ Syed Bhais Pvt. Ltd

⇒ Quaid-E-Azam University, Islamabad.

⇒ Purdue University, MRI Scattering Research Group

⇒ Georgia Institute of Technology, Electromagnetics Research Group

Moreover, a significant share of ESL activities is self-funded from gifts and from the discretionary resources of the Laboratory, its directors and its principal investigators.

Approximately a third of ESL’s activities involve collaborations outside of UET with universities, institutions, and industry, making ESL one of the principal points of UET connection with peer institutions, government, and the business world.

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PEOPLE

DIRECTORS

Professor Dr. Noor Muhamad Sheilk (deanee@uet.edu.pk) Dean Department of Electrical Engineering, UET Lahore Professor Dr. Mohammad Saleem Mian (drmsaleem@uet.edu.pk) Chairman Department of Electrical Engineering, UET Lahore

FACULTY AND PRINCIPAL INVESTIGATORS