High-temperature reversed starter-generator. Design and multi-criteria optimization

This paper proposes a new design of high-temperature starter-generator with external rotor to be installed on high pressure shaft of aircraft engine to implement More Electrical Engine concept. The basic materials to make this starter-generator were selected and justified. Multi-criteria optimization of the developed design was performed using a genetic algorithm and Pareto method. The optimum (in Pareto terms) active length and thickness of permanent magnets of starter-generator were selected as a result of the optimization. Using the obtained dimensions allowed reducing the weight of the designed starter-generator by 10 kg relative to a base option at constant thermal loads. Multidisciplinary computer simulation was performed on the basis of the optimum geometric dimensions, which proved performance efficiency of the design.