Noise of electric vehicle (EV) powertrain - case of Tesla X90D

Summary of e-NVH sound sample
Application Tesla® X90D
Electrical machine SCIM
Supply condition Run-up at max torque
Noise sources Electromagnetic, mechanical, aerodynamic
See also Nissan 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<sup>®</sup> X90D electric powertrain during run-up at maximum torque
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<sup>®</sup> 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 occuring around 10 kHz is due to PWM effects with asynchronous switching frequency.

Application to MANATE

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.

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