Double Armature Partitioned Stator Switched Flux PM Machine for Electric Vehicle Applications

This paper investigates the performance of a partitioned stator switched flux PM machine that has double armature windings. The machine design is dedicated for electric vehicle applications. The modular structure, and the operation principles have been explained. Also, the design and optimization procedure for the machine including the rotor and stator number of poles and optimum parameters of the design have been clarified. The performance of the machine is compared with the conventional partitioned stator machine with a cylindrical inner stator and the salient inner stator machines, and the Prius IPM machine. The partitioned stator machines have the same main parameters which are globally optimized for optimum average torque. The comparison is based on the electromagnetic performance in the open-circuit and on-load analysis. The 2D finite element results show the superior performance of the double armature portioned stator machine based on the highest average torque, the minimum cogging torque, and best torque-current density and torque per PM volume characteristics.