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A Comparative Study of Optimally Designed Synchronous Reluctance Machines

A comparative study is conducted to compare the operating performance of a number of Synchronous Reluctance Machines (SynRMs) optimally designed based on three distinct Objective Functions (OFs) to (i) minimize the torque ripple, (ii) maximize the saliency ratio, and (iii) simultaneously minimize the torque ripple and maximize the saliency ratio while supporting the required torque. For the optimized SynRMs, a normal round rotor and a rotor with a cutoff are used in the Finite Element (FE)-based rotor design optimization, while the stators are identically designed using classic electric and magnetic loading principles. The SynRMs' dimensions and efficiencies are based on IEC-90S frame size and IE3 efficiency standards, respectively. The design optimization and comparative study show the performance capabilities and operating limits of each design proving the superiority of the optimized SynRMs over a non-optimized SynRM.