LS-DYNA and JMAG Coupling Simulation for Change of SPM Motor Magnetic Properties Due to Press-Fitting

Press-fitting is one of the methods to keep the laminated structure of the motor core. It is known that the compressive stress due to press-fitting causes an increase of the core-losses. In this paper, the influence of the press- fitting stress on the motor magnetic properties was investigated using LS-DYNA and JMAG coupling simulation. JMAG is a comprehensive software suite for electromechanical equipment design and development. In this investigation, using LS-DYNA for press-fitting analysis, passing the results of the element data to JMAG, finally core-losses analysis was carried out by JMAG. From the results, the change of the magnetic properties due to press- fitting was clearly obtained.