Design and Analysis of a Multiple-Torque Components Dual Rotor Axial Flux Permanent Magnet Vernier Machine for Aviation Propulsion Applications

In this paper, a novel multiple-torque components dual rotor axial flux permanent magnet vernier machine for aviation propulsion applications is proposed. The machine adopts Halbach PMs in the stator slot opening to reduce leakage flux. Based on the dual rotor structure and flux modulation effect, the proposed machine features four torque components, which can further improve the torque density. The paper investigates the effect of some key parameters on torque and utilizes multi-objective genetic algorithm (MOGA) for global optimization. The machine parameters are determined according to the Pareto solution set. Through the 3-D finite element (FE) method, the paper explores the electromagnetic performances of the machine. The results indicate that the proposed machine has high torque and torque density, which can meet the design requirements of the aviation propulsion machine.