Computational Method of Effective Remanence Flux Density to Consider PM Overhang Effect for Spoke-Type PM Motor With 2-D Analysis Using Magnetic Energy

According to the conventional study, it is possible to perform 2-D finite-element analysis (FEA) to consider rotor overhang effect through the adjusted remanence flux density by employing an overhang parameter. The latest study addressed that the overhang parameter can be obtained using the variation of operating point of permanent magnet (PM). In this paper, we propose the novel computational method to calculate the effective remanence flux density directly to consider PM overhang effect making use of magnetic energy, which is applied for a spoke-type PM synchronous motor. The proposed method is validated through a comparison with the results of 3-D FEA.