Abstract

This paper studies the effect of magnetic forces on acoustic noise and vibrations of electrical machines designed for transport applications, and more especially induction machine used for traction application. The sources of electrical noise in electrical transportation systems are first briefly reviewed. Then, the main physical phenomena responsible for acoustic noise and vibration induced by Maxwell forces in a traction induction machine are reviewed, namely slotting, winding, saturation, eccentricity, asymmetries of the magnetic circuit, and Pulse Width Modulation Effect. In this example the main resonance is due to slotting effect and a detailed analysis of the harmonics (magnetomotive force and permeance waves) is provided based on convolution properties. All the numerical results and noise reconstitutions presented in this paper has been obtained thanks to MANATEE® software. MANATEE is a multi-physics environment dedicated to the fast design of electrical machines, including the computation of acoustic noise and vibrations due to magnetic forces, along with acoustic power level at variable speed.

Preprint and full paper

The preprint is available here:

Characterization of acoustic noise and vibrations due to magnetic forces in induction machines for transport applications using MANATEE software

The presentation is available here:

Phénomènes de bruit et vibrations d’origine électrique, ISMA 2016

Notes