Design and analysis of neodymium free SPOKE-type motor with segmented wing shape permanent-magnet for concentrating flux density

This paper proposes a new design of wing shaped SPOKE-type permanent magnet brush-less direct current (BLDC) motor using ferrite permanent magnet (Fe-PM) instead of neodymium permanent magnet (Nd-PM). Here, a method to maximize the torque density is developed. The proposed model has an improved output characteristic as it uses the properties of the magnetic flux effect of the SPOKE-type motor with an additional pushing assistant Fe-PM and sub assistant Fe-PM in the shape of SPOKE. This is optimized by using proposed analytical calculation method for improving torque density. This paper validates results of the analytical model by finite element analysis (FEA) for proposed wing shaped SPOKE-type BLDC motors.