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NVH of electric motors - a study on potential NVH metric

conference contribution
posted on 2023-01-16, 14:27 authored by Marcos Ricardo SouzaMarcos Ricardo Souza, Mahdi Mohammad-PourMahdi Mohammad-Pour, Stephanos TheodossiadesStephanos Theodossiades, Franz Diwoky, Marti Sopouch, Guenter Offner, Ahmed Haris, Juan Gonzalez, Brett Friskney

The electrification of powertrains poses different noise, vibration, and harshness (NVH) challenges. Whilst the broadband noise radiated by internal combustion engines masks some of the gearbox NVH, electric powertrains cannot count on this masking effect. Moreover, the nature of the motor's electromagnetic forces that drive the powertrain and the inverter feeding current to the system also exhibit tonal behaviour. It is known that the presence of tones in the radiated noise can increase the perceived nuisance of the user. In this work, a multi-body dynamics (MBD) model of an electric powertrain is developed to calculate the forces transmitted from the bearings to the housing, which then radiates noise. Sound pressure is also calculated in the vicinity of the powertrain. The Prominence Ratio is used to identify tonal bands in the spectrum and a neural network detects these prominent bands by analysing the transmitted forces.


Automotive electric powertrain whistling and whining: fundamental root cause analysis to novel solutions

Engineering and Physical Sciences Research Council

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  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Aachen Acoustics Colloquium 2022


Aachen Acoustics Colloquium 2022 (AAC 2022)


Aachen Acoustics Colloquium


  • VoR (Version of Record)

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© Aachen Acoustics Colloquium

Publisher statement

This paper was presented at the Aachen Acoustics Colloquium 2022 (AAC 2022). The conference website is at: https://www.aachen-acoustics-colloquium.com/en/

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  • en


Aachen, Germany

Event dates

21st November 2022 - 23rd November 2022


Dr Marcos Ricardo Souza. Deposit date: 16 January 2023

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