Degree Name

Doctor of Philosophy


Department of Electrical and Computer Engineering


The intention of this project is to design, build, analyse and test a novel form of servo motor. Axial flux permanent magnet machines are highly suitable for servo motors because of their very high torque to inertia ratio. These machine have axial flux geometry. That is, the rotor and stators are formed as discs rather than drums as is the case for conventional machines. This project deals with the development and analysis of a high performance axial flux permanent magnet servo motor using Neodymium-Iron-Boron permanent magnets.

Special problems which arise due to the geometry and high pole number of the new machine have been analysed with new mathematical models developed in this project. It was found that the computer simulation of these mathematical models solve the three dimensional field problems involved in the machine analysis without necessitating the use of any commercially available package. The analysis is found to give satisfactory results and it was also found that the new machine significantly outperforms the best servo motors currendy available on the market in terms of acceleration and available torque per unit weight.