Comparative Study Between C-Core/E-Core SFPMM with Consequent Pole SFPMM

Switched Flux Permanent Magnet Machines (SFPMM) are competent candidates when high torque density is the essential demand however, large volume of rare earth Permanent Magnet (PM) increase overall machine cost and weight. Moreover, PMs ending through stator yoke cause serious issues of flux leakages which deteriorate electromagnetic performance. In order to reduce PM usage and suppress flux leakage, Consequent Pole SFPMM (CPSFPMM) is developed that successfully suppress flux leakage and reduce PMs volume effectively. Moreover, Finite Element Analysis (FEA) is accomplished utilizing commercially available FEA package JMAG designer v.18.1 for performance evaluation of six different topologies of SFPMM and CPSFPMM with E-Core and C-Core. Various key performance indicators such as open-circuit flux linkage, cogging torque, torque ripples, Total Harmonic distortion (THD), electromagnetic torque and PM cost and weight are analyzed and compared. Based on Finite Element (FE) analysis developed CPSFPMM with E-Core and C-Core successfully suppress PMs leakages form stator and reduced PMs volume by 22.98% and PM cost by 22.49%. Thus, reduces overall machine cost and weight. Moreover, the proposed designs have successfully reduced cogging torque, torque ripples, THD, and improve torque capability under higher current density.