Design of synchronous reluctance and permanent magnet synchronous reluctance machines for electric vehicle application

This paper compares the relative merits of synchronous reluctance machine (SynRM) and permanent magnet assisted SynRM (PMA-SynRM), including ferrite-assisted SynRM, NdFeB-assisted SynRM and interior permanent magnet machine (IPM) for electric vehicle (EV) applications, in terms of electromagnetic performance and material cost. Firstly, the conditions imposed in the optimization process of SynRM or PMA-SynRM, which can minimize the number of optimization parameters, are discussed. Then, SynRM, ferrite-assisted SynRM and NdFeB-assisted SynRM are designed with the same stator outer diameter and stack length as Prius 2010 IPM. Finally, the results are compared and discussed.