A New Variable Flux Partitioned-Stator Flux Modulation Machine With Multiple Excitations

This paper proposes a new variable flux partitioned-stator flux modulation machine with multiple excitations (VF-PSFMMEM), which places permanent magnets (PMs) on the inner stator and rotor simultaneously to enhance torque production, and employs field windings in the inner stator to realize flux weakening. The configuration and operating principle of machine are described. A multi-objective optimization design of machine is developed for obtaining high average torque (T_avg), good flux weakening capability and low torque ripple (T_rip). The electromagnetic performances of VF-PSFMMEM at different excitation sources are analyzed through finite element method. The results indicate that VF-PSFMMEM can provide large flux linkage, high T_avg, low T_rip, high efficiency and good flux weakening capability.