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The entire thesis/dissertation text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on September 9, 2009). Thesis advisor: Roger Fales. Includes bibliographical references.

published_or_final_version / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy

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This thesis presents a design method for a switched reluctance (SR) motor to optimise torque production for two types of 3 phase 6/4 poles SRM and 8/6 poles SRM designs. SR motors require precise control to optimise the operating efficiency; two controllers are proposed and built to operate the switched reluctance motor. The primary objectives of this thesis are: • To investigate the developed torque optimization for switched reluctance (SR) motors as a function of various dimensions e.g. pole arc/pole pitch variation, stator shape variation and rotor shape variation. This investigation is achieved through the simulation using Finite Element Method (FEM), MATLAB/SIMULINK. • The two proposed controllers are designed and built to carry out the experimental testing of SRM. The most versatile SRM converter topology is the classic bridge converter topology with two power switches and two diodes per phase. The first controller consists of a Programmable Logic Controller (PLC) and the classic bridge converter, this Programmable Logic Controller uses a simple language (ladder language) for programming the application code, reliable, and contains timers. The second controller consists of a cam positioner, encoder and the classic bridge converter, this cam positioner is easy to be programmed, high-speed operation, and this cam positioner has 8 outputs. This thesis is organized as follows: Chapter 1 describes the background, the present and future trends for the SRM. This chapter shows the design, control, finite element analysis, fuzzy logic control the for a switched reluctance (SR) motor (literature review). Chapter 2 describes the theory and principle of finite element method, as applied to SR motors. Chapter 3 describes the simulation results for serious of switched reluctance motor designs by changing (_) rotor pole arc / pole pitch ratio, and (_) stator pole arc / pole pitch ratio, for 3 Phase, 6/4 Poles SRM and 4 Phase, 8/6 Poles SRM. The results are obtained through finite element method (FEM) and MATLAB-SIMULINK. Chapter 4 describes the theory of fuzzy logic controller (FLC). This chapter shows the simulation results for the FLC. Chapter 5 describes the proposed programmable logic controller (PLC), and associated hardware and software. The proposed programmable logic controller produces lower speed. The cam positioner controller produces higher speed; the experimental results for both controllers are presented and discussed. Chapter 6 describes the summary of results from earlier chapters to draw the final conclusion for the thesis. The recommendations for further research are also discussed. Appendix A describes the program code for the PLC controller. Appendix B contains a CD of photos album, video clips for the PLC controller and cam positioner controller. Appendix C shows the list of the published papers by the author, extracted from this thesis. / Doctor of Philosophy (PhD)

Thesis (M. Phil.)--University of Hong Kong, 1988.

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