Electromagnetic Vibration Synthesis


An accurate assessment of the vibro-acoustic behaviour of variable speed applications requires to run calculations over a high number of operating speeds to correctly catch structural resonances and maximum levels. This usually represents a high computational load, as multiphysic e-NVH calculations must be carried at each speed.

Manatee software Electromagnetic Vibration Synthesis (EVS) algorithm provides a significant acceleration of computing time of electromagnetic vibrations at variable speed or during optimization loops. This is done by splitting the characterization of the structural response from the calculation of operational magnetic loads assuming that linear structural dynamics. More than a significant acceleration of the computation time, EVS gives more physical insights on load cases which are radiating the most noise (e.g. radial pulsating force applied to stator teeth).



The characterization of the structural response under electromagnetic Unit Load Cases (ULC) can be carried by mechanical engineers, while the calculation of operational magnetic loads can be carried by electricl engineers. Electromagnetic Vibration Synthesis can be performed by both electrical and mechanical engineers, either in early design phase with a simplified structural model, or in detailed design phase, when a full 3D FEA mechanical model of the electrical system has been defined outside Manatee.