Optimum design for CW-SynRM with loss and efficiency evaluations,using coupled Preisach model and FEM and experimentation

Abstract

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