e-NVH in railway applications

Railway noise can involve electromagnetically-excited acoustic noise and vibrations, in particular noise and vibrations of electrical machines.

The electrical traction chain of rolling stocks include both active and passive systems which can potentially vibrate and create acoustic noise due to electromagnetic forces. The acoustic noise level of railway transports is strictly regulated at several levels (TSI, IEC), and these standards include some penalies for the tonal character of these acoustic annoyances. The acoustic noise due to electromagnetic forces is characterized by strong tonalities: the understanding of their root cause is therefore essential to reduce them at source and meet standard requirements with minimal cost.

These railway components are more especially:
- electrical traction motors (synchronous, induction motors)
- electric pumps
- electric fans

Manatee simulation software allows to control the noise level of these components during their whole development cycle, from early design stage to system-level detailed design stage, including specialized e-NVH analysis and mitigation tools.

Complementary to Manatee e-motor NVH virtual prototyping capabilities, EOMYS ENGINEERING can characterize vibro-acoustic issues with advanced electrical, vibration and acoustic measurements and implement suitable electrical, control and mechanical solutions after manufacturing. Regular technical trainings on e-NVH are also provided.