Electromagnetic noise / eNVH

bruit électromagnétique eNVH

The CEVAA simulates and characterizes electromagnetic noise and vibrations of electric motors.

Our services

Engineering and testing

  • Noise measurements of an electric vehicle (ex: VAE, electric microcar)
  • Study of the integration of an electric motor on a chassis
  • Determination of reception stiffness and sizing of filtration systems
  • Design and production of acoustic hoods to attenuate electromagnetic noise

Vibroacoustic simulation

  • Calculation of electromagnetic forces
  • Calculation of the resulting magnetic vibrations
  • Calculation of the resulting magnetic noises

Engine modelling and optimization

  • Quick NVH calculation during early electromagnetic design loops
  • Optimized NVH calculation in the detailed design phase (coupling with finite element structural analysis) over the entire operating range
  • Advanced post-processing for NVH root cause analysis
  • Optimization of the design of noise attenuation techniques for electric motors

In addition to electromagnetic noise, the study of electrical machines requires consideration of mechanical, thermal, and vibro-acoustic aspects.

CEVAA test capacities

  • Synchronous measurement of noise, vibration and electrical signals
  • Motion transmission analysis (command tracking, diagnostics)
  • Analysis of transfer pathways to determine injected forces
  • Characterization of small and medium sources (direct measurement of forces)
  • Benchmark analytical correction methodology to increase the upper limit of analysis frequency

Means and software

  • 2D and 3D streams
  • Optistruct
  • Actran
  • 3D laser vibrometry

FEMM (Finite element method electromagnetic simulations)

Application examples


  • Radial magnetic force, tangential magnetic force on stator teeth (as a function of time and frequency), magnetic modes.
  • Non-linear magnetostatic model by finite elements (FEMM, Flux)


  • Modal analysis
  • Magnetic force wave at a given frequency, eigenfrequencies, operational deformations


  • Calculation of frequency responses
  • Contribution of the modes of the structure
  • Optimization with sensitivity study


logiciels calculs salome meca actran code aster msc software

Calculation software

calculs haute performance calculateur myria

High Performance Computing (HPC)

For more information, contact us to discuss technically on your needs!