This paper studies the dual-channel permanent magnet synchronous machine of the aircraft electric propulsion system. Firstly, the redundant output principle of the dual-channel machine system on the electric propulsion aircraft is explained. Then, the different forms of dual three-phase winding structures are compared. A dual-channel permanent magnet synchronous machine with phase-shifted dual three-phase windings is proposed. The electromagnetic characteristics of the dual three-phase synchronous machine with phase-shifted windings are emphatically studied. Also, the stator loss distribution characteristics are analyzed. Combining the cooling capacity and the stator loss distribution characteristics, the single-channel output capacity of the proposed dual-channel permanent magnet synchronous machine when a partial failure occurs is calculated. Finally, a 110 kW dual-channel permanent magnet synchronous machine prototype is developed. The analysis results are verified through experiments. The calculation results show that the machine can maintain an output power of at least 70% rated power when operating with a single channel, which can provide redundant power for the aircraft in emergency. © 2022, Beihang University Aerospace Knowledge Press. All right reserved.
