Multi-objective optimization analysis of auxiliary flux modulator magnetic gear with unequal magnetic poles

To enhance the output torque and minimize ripple of coaxial magnetic gear (CMG), a novel auxiliary flux modulator CMG with unequal poles is proposed. This design incorporates an inner rotor asymmetric sector trapezoidal combined N-S pole structure, featuring Halbach arrays for arrangement permanent magnets (PMs). The outer PMs adopt Spoke-type configuration. optimize high low ripple, sensitivity analysis conducted to identify key size parameters that significantly influence optimization objectives. Based on hierarchy these parameters, multi-objective performed using genetic algorithm (GA) determine optimal structural parameter values CMG. In addition, (CMG) topology 4 17 pairs adopted, parametric model established. Finally, electromagnetic properties are evaluated finite element method. results indicate remarkable reduction in specifically by 46.15%.