This content is not included in your SAE MOBILUS subscription, or you are not logged in.
NVH Technologies and Challenges on Electric Powertrain
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 13, 2018 by SAE International in United States
Annotation ability available
Event: 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
In this article, NVH performance of fully electric vehicles and some key technologies for NVH improvement are presented. A focus is made on a global NVH simulation methodology able to take into account the electromagnetic excitation sources and all the powertrain structure. Examples of simulation results are shown which allow us not only to predict the NVH performance, but also to understand better the fundamental NVH behavior of an electric motor. In an electric motor, the most important NVH phenomenon is the whistling noise, which is caused by the electromagnetic forces and amplified by the powertrain structure. With the current NVH simulation technology, e-motor whistling noise levels can be accurately simulated up to 4500 Hz.
The improvement of e-motor whistling noise can be achieved both by reduction of the electromagnetic forces at the source and by optimization of powertrain structure. As far as the powertrain structure is concerned, there are two modes which have predominant effects on the e-motor whistling noise: the torsional mode (<1000 Hz) and the breathing mode (5000-6000 Hz) of the stator-housing assembly. In the low motor speed range, the dominant phenomenon is the coupling between the 24th order tangential electromagnetic forces and the torsional mode of the stator assembly. In the high speed range, the dominant phenomenon is the coupling of radial excitations of 48th order with the radial breathing mode of the stator assembly. The choice of powertrain structure design must be made according to NVH targets and according to the constraints for powertrain layout and weight-lightening.
|Technical Paper||Integrated Approach to Electro-Mechanical System NVH Analysis|
|Technical Paper||The New Challenges of NVH Package for BEVs|
|Technical Paper||NVH Aspects of Electric Drives-Integration of Electric Machine, Gearbox and Inverter|
CitationWang, S., Jouvray, J., and Kalos, T., "NVH Technologies and Challenges on Electric Powertrain," SAE Technical Paper 2018-01-1551, 2018, https://doi.org/10.4271/2018-01-1551.
- Humbert, L., Pellerey, P., and Cristaudo, S., “Electromagnetic and Structural Coupled Simulation to Investigate NVH Behavior of an Electric Automotive Powertrain,” ISNVH, 2012.
- Frias, A., Pellerey, P., Lebouc, A.K., Chillet, C., Lanfranchi, V., Fridriech, G., Albert, L., and Humbert, L., “Rotor and Stator Shape Optimization of a Synchronous Machine to Reduce Iron Losses and Acoustic,” Vehicle Power and Propulsion Conference (VPPC), 2012. IEEE.
- Dupont, J.B. and Bouvet, P., “Vibroacoustic Simulation of an Electric Motor: Methodology and Focus on the Structural FEM Representativity,” ICEM 2012, France, September 2012.
- Pellerey, P., Favennec, G., Lanfranchi, V., and Friedrich, G., “Active Reduction of Electric Machine Magnetic Noise by the Control of Low Frequency Current Harmonics,” IECON 2012.
- Geoffriault, M., Godoy, E., Beauvois, D., and Favennec, G., “H∞ Control for Vibrations of a Wound Rotor Synchronous Machine,” Applied Mechanics and Materials 704:345-349, 2015.
- Yoshimoto, K. and Katajima, Y., “A Novel Harmonic Current Control for IPMSMs,” IPEC Niigata, 2005.
- Yamamoto, K., “Technologies for Motor Noise Reduction in the Newly Developed Electric Powertrain with Mechatronical Integration System,” JSAE Annual Congress, 2014.