More electric aircraft starter-generator system based on switched reluctance machine: a feasibility studyTools Velmurugan, Ganeish (2020) More electric aircraft starter-generator system based on switched reluctance machine: a feasibility study. PhD thesis, University of Nottingham.
AbstractDevelopment towards More Electric Aircraft (MEA) witnessed increase of electrical power source system in modern aircraft. One of the key enablers towards development of MEA is the starter-generator (S/G) technology. S/Gs use a single electrical machine to perform starter operation during aircraft main engine starting-up procedure and operate as a generator by extracting power from the main engine to provide on-board electrical power. Various electrical machines have been considered as potential S/G for usage in aircraft. Switched Reluctance Machine (SRM) which is one of the earliest built electrical machines generated a lot of research interest for usage as S/G in aircraft. SRM however suffers from very high torque ripple which results in high vibrations and noises. This would need to be addressed if SRM is to be a viable option as a S/G in aircraft application. The aim of this thesis is to investigate the feasibility of SRM’s usage as S/G in aircraft application. To address the high torque ripple in SRM, control schemes were developed to minimise the ripple to acceptable range applicable for aircraft usage. Torque ripple minimisation control scheme is developed based on Torque Sharing Function (TSF) method which is based on an ideal torque reference which indirectly shapes the current to reduce the torque ripple. An area of interest is the SRM operation as a generator which was not comprehensively studied to be deemed feasible for aircraft usage. The work done in this thesis intends to fill in the gap of lack of study in SRM’s operation as a generator. The developed control schemes were implemented in simulation environment through MATLAB/SIMULINK and validated through experimental through a developed experimental rig setup.
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