Optimization Methodology for High Frequency, Slotless PM Synchronous Machines Based on Drive System Co-Design

High frequency, slotless permanent magnet synchronous machines are proposed for promising aircraft electrified propulsion applications to meet carbon reduction targets. This paper presents a co-design optimization methodology in pursuit of high specific power and high efficiency. Combined analysis has been made on the motor-filter-inverter drive system performance and mass, with special emphasis on the prediction of carrier current harmonics and additional losses. The optimal design of the proposed topology can have 2-4 times higher specific power than state-of-the-art motor drive systems.