Torque improvement of synchronous reluctance machines by utilizing orthogonal experimental design methodology

The performance of synchronous reluctance machines (SynRM) in terms of average torque and torque ripple depends on rotor geometry. In this paper, a novel technique for SynRM design based on orthogonal experimental design (OED) optimization method is proposed which considers the interaction of various design variables. These variables include several rotor geometric parameters such as flux barrier width, insulation ratio, pole span angle, and etc. First, the effects of rotor geometric parameters on average output torque and torque ripple are studied. Then, the rotor design process is carried out through OED method. Finally, finite element analysis is used to verify the validity of the results obtained from the proposed optimization methodology.