A Multiphysics Approach for NVH Analysis of PMSM Traction Motor Tata Motors, Limited

Format:

Book

Conference/Event

Author/Creator:

Mahadevan, U., author.

Contributor:

Kumar, Vivek

Sambharam, Tushar

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

Traction motor is one of the most important system in the powertrain of an electric vehicle. Motor whine is a major source of concern in EV design and integration. Though not as loud as IC engines, this high-pitched noise, on a continuous basis can be annoying for the driver, especially at a frequency above 1 kHz. The main contributors for motor whine include radial electromagnetic (EM) forces and rotor eccentricity. Evaluation of these noise sources through simulation enables earlier intervention and correction in development process.The major challenge in NVH prediction of traction motors is incorporating multiple physical behaviour and integrating them. This becomes extremely necessary especially in noise optimization as it could adversely affect the motor performance. The developed method should include accurate EM analysis for performance estimation and force extraction as well as a detailed vibro acoustic approach for noise prediction. The dominance of motor noise at high frequency levels calls for the simulation over a wide range of speeds, making it computationally intensive.In this study, a multiphysics approach to analyse the NVH aspects of an 8 pole PMSM traction motor by coupling the EM and NVH simulations is presented. All relevant orders of force excitation, vibration and noise levels are captured and critical operating points of the motor, from NVH perspective are identified. The study also focuses on the effect of rotor eccentricity on motor NVH, as the rotor's static and dynamic eccentricity leads to creation of additional harmonic orders of vibration.The outcome of the study can help to identify characteristics of irritable tonal components of high frequency noise from the motor and provide a platform for optimization of motor over the performance and the NVH characteristics. This will aid in developing better engineering solutions for NVH refinement of powertrain and the vehicle

Notes:

Vendor supplied data

Publisher Number:

2021-26-0520

Access Restriction:

Restricted for use by site license