| Application | Electrically assisted lifting desk (Ikea®) |
| Electrical machine | Geared BLDC motor (Brose®) |
| Supply condition | Run-up at max torque under non sinusoidal supply |
| Noise sources | Electromagnetic, mechanical |
| See also |
Measurement set-up
Noise is measured 10 cm away from the right electric motor. The two electric motors run in parallel.
Sound file and spectrograms
The acoustic pressure spectrograms represented below is obtained when running up and down the desk with a Brose motor.
The corresponding sound file is available here:
Sound of a lifting desk electric motor
Note: these sound files are the property of EOMYS; for authorized use in presentations, website, publications or technical work, please contact us
E-NVH interpretations
This sound file illustrates electromagnetically-excited noise of a small electric powertrain used for desk lifting. One can hear the combination of electromagnetic and gearbox noise. A low frequency modulation of the electric motor load appears due the modal response of the desk under electric motor excitation.
Application to MANATEE
MANATEE software can be used to quickly calculate NVH due to electromagnetic forces both in early design and detailed design phase, including PWM and slotting effects.