A Novel Axial-Flux Permanent Magent Vernier Machine with H-core Stators and Heat Pipes for Electric Aircraft Propulsion System

In this article, a novel axial-flux permanent magnet vernier machine with H-core stator modules (PMVM-HCS) was first proposed and investigated. To start with, the machine topology is illustrated and analyzed. In addition, the winding configurations and slot-pole combinations of PMVM-HCS are also investigated. Secondly, according to the aircraft propulsion and dimension requirements, the specifications are frozen and fixed to help the motor design. Then, the influencing factors, e.g., slot-pole combination, winding configuration, and dimensions, etc., are analyzed and extracted. Thirdly, after the optimized model is obtained, to fairly compare the performance of proposed AFM-PMVM-HCS is are simulated and analyzed, e.g., no-load back-EMF, cogging torque, magnetic field, output torque, etc. Eventually, the prototype was manufactured and tested, and the experimental results agree well with the finite-element results, which can also validate the previous analysis. Overall, this article aims to provide a novel modular axial-flux PMVM with superior torque density and fault tolerance for advanced electric aircraft propulsion system.