To achieve high power density and high efficiency of the motor in electric propulsion aircraft, this paper proposes a slotless Axial Flux Permanent Magnet (AFPM) machine, which inherits high efficiency of ironless stator AFPM machine, and achieves higher power output capability. Firstly, topologies of three kinds of AFPM machines are described, including ironless stator AFPM machine, slotless AFPM machine, and Yokeless Armature and Segmented Armature (YASA) AFPM machine. Then, the winding factor, torque output capability and loss distribution of the three kinds of machines are analyzed, and the mechanisms of losses of the machines are also studied. When used as the aircraft propulsion machine, the three machines are compared in terms of electromagnetic characteristics. The results show that the slotless AFPM machine proposed has the advantages of high power density and high efficiency, and is suitable for the electric propulsion aircraft. Finally, the prototype of a 50 kW ironless stator AFPM machine is developed, and the experimental results verify the correctness of the theory and simulation analysis method.
GAO Huamin
,
ZHANG Zhuoran
,
WANG Chen
,
XUE Han
,
LIU Ye
. Comparison and analysis of new high power density axial flux permanent magnet machine for electric propulsion aircraft[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022
, 43(5)
: 325229
-325229
.
DOI: 10.7527/S1000-6893.2021.25229
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