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 compar- isons 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 re- luctance 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 hystere- sis 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.