Loss & efficiency evaluations of SynRM according to windings type by coupled Preisach models & FEM and experiment

This paper deals with optimum design criteria to minimize the torque ripple of a concentrated winding Synchronous Reluctance Motor (CW-SynRM) using Response Surface Methodology (RSM). The feasibility of using RSM with the finite element method (FEM) in practical engineering problem is investigated with computational examples and comparison between the fitted response and the results obtained from an analytical solution according to the design variables of stator and rotor in a concentrated winding SynRM (6slot). And then this paper presents the efficiency evaluations in a normal synchronous reluctance motor (SynRM) and concentrated SynRM (CW-SynRM) using a coupled transient finite element method (FEM) and Preisach modeling, which is presented to analyze the characteristics under the effect of saturation and hysteresis loss. The focus of this paper is the optimum design relative to torque density, ripple characteristic on the basis of stator, rotor shape in a CW-SynRM and the efficiency evaluation relative to hysteresis loss, copper loss, etc. on the basis of rated load condition in a SynRM and CW-SynRM. Computer simulation and experimental result for the efficiency using dynamometer show the propriety of the proposed design method and the high performance of CW-SynRM.