Comparative study of novel axial flux magnetically geared and conventional axial flux permanent magnet machines

In this paper, a performance comparison between the novel axial flux magnetically geared machines (AFMG) and the conventional axial flux YASA machine is presented. The AFMG and YASA machines have the same stator construction in which segments are equipped with concentrated windings to form the stator. However, the AFMG machine has two rotors with different pole-pair numbers. Magnetic gear effect can be obtained to increase the torque density. The performance comparisons at no-load and on-load conditions are then studied by 3D-finite element analysis (FEM). Moreover, both machines are prototyped, tested and compared.