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Department of Electronic & Electrical Engineering, Unit Catalogue 2007/08

EE20085 Electromagnetics

Credits: 6
Level: Intermediate
Semester: 1
Assessment: CW 20%, EX 80%
Before taking this unit you must take EE10080 and take ME10138 and take ME10139
Aims & Learning
To provide a fundamental understanding of the behaviour of electromagnetic fields with particular emphasis on the low frequency limit of Maxwell's equations. To introduce the mathematics which allows the fields to be visualised and employed in the design of useful devices. To provide an introduction to some of the CAD tools for designing electromagnetic devices. Traditional lectures will be augmented by a series of pictures and animations which will be available on the net so that students will gain a good visual understanding of fields.
Electrostatics: Basic concepts will be reviewed, charge, potential, electrostatic energy, force, effects of dielectric materials. Magnetostatics: Current sources of magnetic fields, magnetic field strength, magnetic flux density. Effects of magnetic materials. Interface conditions, magnetic field energy, forces. Time varying current and fields in conductors: Faraday's Law. Eddy currents. Lenz's Law, Maxwell's equations. Electromagnetic Devices: Very basic action of transformers, motors and actuators. Mathematics: The necessary mathematics will be introduced as required throughout the course, grad, div, curl.