Efficient acoustic optimization of permanent magnet excited synchronous motors by means of hybrid modeling and FEM-to-measurement transfer functions
A methodology for the acoustic optimization of PMSMs applying two steps is proposed: hybrid modeling to obtain the magnetic field and forces at comparatively small computational effort and FEM-to-measurement transfer functions to assess the structural behavior and the radiation characteristics of the machine at once. Both steps are discussed and applied to a specific PMSM design, which is subject to the optimization. The proposed approach relies on a (virtual) prototype. The resulting optimized geometry shows significant reduction potential in terms of total sound pressure level, up to 9dB, but at the cost of a larger magnet volume.