Multiphase Machines for Electric Vehicle Traction

To have greater impact on application it is desirable to integrate machines and their associated power electronic converters into complicated systems that share component count to minimise cost. However, while compactness of systems is achieved, reliability of the power conversion components can be compromised by the arduous nature of system operating environments. This paper investigates the impact of using higher phase numbers for electromagnetic machines and their associated power electronic converters specifically targeting improved specific and volumetric power density and increased lifetime. Key findings are improved prediction of iron-loss and electromagnetic power density, performance, packaging and hence cost.