Optimization Method for Rotor Salient Pole Reluctance of Magnetically–Geared Machine

Optimization method for rotor salient pole reluctance considering effects of its own slotting depth and other machine parameters are proposed in the paper, taking 12/10, 12/14 and 12/16 pole magnetically−geared machine as examples. With the aid of general airgap field modulation theory, the torque production mechanism of magnetically−geared machine considering differences in summation and differential modulation is revealed so as to prove identical optimization direction regardless of pole pair combinations. Further, by establishing the relationship between torque performance and rotor parameters, a combined optimum configuration of the rotor pole is proposed. The finite element analysis is carried out to verify the effectiveness of the proposed optimization method.