Noise of electric vehicle powertrain (EV HEV NVH) – case of Tesla X90D

Summary of e-NVH sound sample
ApplicationTesla® X90D (EV HEV NVH)
Electrical machineSCIM
Supply conditionRun-up at max torque
Noise sourcesElectromagnetic, mechanical, aerodynamic
See alsoNissan Leaf, Renault Zoe

Measurement set-up

Noise is measured close to electric powertrain and at driver’s hear. A run-up is done with maximum torque up to 120 km/h in free field environment. Eco mode and AVAS options are not activated.

Sound file and spectrograms

Sound of Tesla® X90D electric powertrain during run-up at maximum torque

Note: these sound files are the property of EOMYS; for authorized use in presentations, website, publications or technical work, please contact us

Sound pressure level spectrogram of Tesla® X90D electric powertrain during run-up at maximum torque close to engine (left) and at drivers's ear (right)
Sound pressure level spectrogram of Tesla® X90D electric powertrain during run-up at maximum torque close to engine (left) and at drivers’s ear (right)

 

E-NVH interpretations

This sound file illustrates electromagnetically-excited noise of the electric powertrain of Tesla X90D EV. High pitch, whining noise with increasing frequency is due to slotting effects. Higher frequency sound occurring around 10 kHz is due to PWM effects with asynchronous switching frequency.

For a more detailed analysis, EOMYS provides technical trainings dedicated to EV HEV NVH.

Application to MANATEE

MANATEE software can be used to quickly calculate EV HEV NVH due to electromagnetic forces both in early design and detailed design phase, including PWM and slotting effects.

 

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