NVH analysis and optimization of an electric powertrain
Typ
Examensarbete för masterexamen
Program
Applied mechanics (MPAME), MSc
Publicerad
2022
Författare
Subramanian, Vignesh
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Because of its compact shape and high power density, the permanent magnet synchronous
motor (PMSM) appears to be better as a drive motor for electric construction
machines (ECMs). However, as compared to conventional construction
machines, the motor-driven machine has exhibited a different noise profile as a result
of the shift in noise excitation source. The dramatic increase in high-frequency
noises is particularly noticeable in this scenario. Furthermore, some of these highfrequency
noises are distributed in the frequency range that is sensitive to human
hearing, causing operators to feel highly uneasy.
Furthermore, gear whine noise emitted from the electric powertrain system could
significantly affect driving comfort and has become an important NVH problem.
The motor’s electromagnetic forces and the reducer’s gear-meshing forces could create
structural vibration and whining noise with clear order characteristics. As a
result, it’s critical to look into the NVH characteristics of PMSM and reducer for
ECMs. Computer-aided engineering (CAE) based vibration and sound simulation
is a key approach for studying and optimizing electric powertrain NVH behavior,
especially in the early stages of design. To put it another way, being able to forecast
the noise and vibration harshness (NVH) behavior of an electric drive used in ECMs
without having to run experimental solutions can save a company a lot of time and
money.
Beskrivning
Ämne/nyckelord
NVH , PMSM , Electric Motor , ECMs , Powertrain