Multidisciplinary Design Optimization of the Actuation System of a Hybrid Electric Aircraft Powertrain

In the context of hybrid electric and full powertrains for future less-pollutant aircrafts, this paper focuses on multidisciplinary design optimization (MDO) actuation system, including a surface-mounted PMSM in order to maximize power density device: study is preliminary approach before integrating whole powertrain. After an introduction MDO context, analytical model motor detailed. It integrates multi-physical aspects (electric, magnetic, mechanical, thermal, partial discharges insulation, control flight mission) takes several heterogeneous constraints into account. The method involves genetic algorithm allowing reduction weight with regard wide set constraints. results show crucial sensitivity electro-thermal coupling, especially importance transient modes during sequences due thermal capacitance effects. Another major point related performance cooling, which requires “internal cooling” stator slots addition “base rotor. Gathering these analyses, leads high actuators beyond 15 kW/kg high-voltage–high-speed solutions, satisfying all (insulation, magnet demagnetization) over mission.