Magnet Varieties and its Characteristics on the Performance of Dual Stator Permanent Magnet Machine

The impact of magnet characteristics such as its coercive force and residual flux density or magnetic remanence on the electromagnetic performance of dual stator permanent magnet machine is investigated and presented in this study. The predicted magnet types are: ferrite, alnico, neodymium-iron-born (NdFeB) and samarium-cobalt (SmCo). Finite element analysis (FEA) is implemented in the predictions. The FEA calculated performance indexes are: airgap flux density, inductances, force, torque and power. The results reveal that the machine having neodymium-iron-boron magnet is the best candidate amongst all while the least electromagnetic performance is recorded in the ferrite-made machine. Moreover, the machines that are made with either NdFeB or SmCo magnets would possess greater fault tolerant potential and better saturation withstand capability than the ones that are made with either ferrite or alnico magnets. The analyzed machine is suitable in traction applications.