e-NVH in automotive applications (EV/HEV NVH)

Vehicle Noise, Vibration and Harshness (NVH) can involve electromagnetically-excited acoustic noise and vibrations, as well as noise and vibration of electric machines.

Current automotive products already include many electrical systems, but the development of hybrid traction and full electric traction (HEV/EV) and the replacement of hydraulic actuators by electrical actuators increase the presence of on-board electromechanical devices and passive electrical components.

The following automotive components can vibrate and make unpleasant acoustic noise due to electromagnetic forces (e-NVH issues):

- electric traction motors or generators in electric powertrains and Electric Drive Units (EV/HEV)
- starter alternators (BSG P0 level)
- e-booster (high speed electrical turbocharger)
- electrified axles
- e-motors used in ancilliaries
- ABS drives and electric pumps
- motors for electric power steering (EHPS), differential gears, e-clutch (electrified Dual Clutch Transmission)
- steering motors for seat adjuster, head-rest, safety belt, sunroof
- window lift motors, sliding roof drives, tailgate electric motors, wiper motors, door lock actuators, parking locks
- motors for radiator cooling fan modules (CFM)

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.