Abstract

This article deals with the numerical simulation
methodology of electromagnetic vibrations in electrical machines.
Three methodologies are compared to evaluate vibrations due to
Maxwell forces in the Finite Element Analysis (FEA) software
Optistruct: the direct method based on Fourier series expansion of
nodal magnetic forces, and the unit rotating wave or tooth
excitation methods using Electromagnetic Vibration Synthesis.
These three methods have been implemented in MANATEE
electromagnetic and vibroacoustic software in a fully automated
way. The different coupling strategies applied to a simplified
electrical machine give same results but with different calculation
times and Optistruct model complexities. It is concluded that the
tooth excitation method is the preferred one to carry variable
speed calculations or vibroacoustic optimization in the particular machine of the paper.

Preprint and full paper

The full paper can be found on ResearchGate.

Notes

The best coupling method depends on machine tooth number, machine symmetries and the number of magnetic force wavenumbers.