2. Characterization of magnetic forces

2.1 Resonance principle

We first assume that Maxwell's forces do not vary along the machine axis, and can therefore only excite bending modes in the stator plate/frame structure, which can be likened to an orthotropic cylindrical shell . Rolling and pressing of the laminations tend to give rise only to purely radial modes ...

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Characterization of magnetic forces

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Prediction of audible magnetic noise

Bibliography

(1) - BERANEK (L.L.), VER (I.L.) - Noise and vibration control engineering (Ingénierie du contrôle des bruits et vibrations). - Wiley interscience (1992).
(2) - LE BESNERAIS (J.), FASQUELLE (A.), HECQUET (M.), LANFRANCHI (V.), BROCHET (P.),...

Standards and norms

Electric drive – Rotating electrical machines for rail and road vehicles – Part 2: AC motors powered by electronic converters - CEI 60349-2 - 2010
Machines électriques tournantes. Partie 9 : Limites de bruits - CEI 60034-9 - 2007
Rotating electrical machines. Part 14: Mechanical vibration of certain machines with shaft heights greater than or equal to 56 mm. – Vibration measurement, assessment and limits...