Novel alternative switched flux memory machines having hybrid magnet topologies

This paper proposes two new switched flux memory machines (SFMMs) based on the concept of E-core and C-core conventional SF machines. With the proposed topologies, the torque density can be enhanced while the magnet usage can be reduced compared with their counterpart conventional SF machines. Meanwhile, since both normal PM and low coercive force PM materials are adopted, the proposed machines also obtain obvious flux adjustable capability, which is particular suitable for electric vehicular applications. In this paper, the stator/rotor pole (N_s/N_r) combination, magnet dimensions and design parameters will be optimized for the proposed topologies. Then, the electromagnetic performance of the proposed machines will be investigated and compared with the conventional SFMMs to validate their improvements.