Electromagnetic noise / 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
#1 ELECTROMAGNETIC MODEL
- 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)
#2 STRUCTURAL MODEL
- Modal analysis
- Magnetic force wave at a given frequency, eigenfrequencies, operational deformations
#3 ACOUSTIC MODEL
- Calculation of frequency responses
- Contribution of the modes of the structure
- Optimization with sensitivity study
For more information, contact us to discuss technically on your needs!