Fast-and-easy acoustic optimization of PMSM by means of hybrid modeling and FEM-to-measurement transfer functions

This paper proposes a methodology for the acoustic optimization of PMSM applying two steps: 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 explained and applied to a specific PMSM design, which is subject to optimization. The proposed approach relies on a (virtual) protoype. The resulting optimized geometry shows significant reduction potential in terms of total sound pressure level, up to 18dB(A), but at the cost of a larger magnet volume. Limitations of this procedure are discussed.