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NVH Design, Analysis and Optimization of Chevrolet Bolt Battery Electric Vehicle
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
A multi-stage system level method is used to design, optimize and enhance electric motor NVH performance of General Motors’ Chevrolet Bolt battery electric vehicle (BEV). First, the rotor EM (electromagnetic) design optimizes magnet placement between adjacent poles asymmetrically, along with a pair of small slots stamped near the rotor outer surface to lower torque ripple and radial force. The size and placement of stator slot openings under each pole are optimized to lower torque ripple and radial force. Next, motor stator level FE (Finite Element) analysis and modal test correlation are performed to benchmark the orthotropic stator material properties and accurately predict modal results within 7% error below 2 kHz. Furthermore, tangential and radial EM forces are applied on motor-in-fixture subsystem FE model, which predicts surface vibration and pseudo sound power on the motor housing. Analysis results are validated by test data, and are used to benchmark electric motor as BEV noise source. Analysis also helps to identify key motor orders and rpm for NVH optimization. Lastly, optimized EM and motor mechanical designs are modeled in the drive unit (DU) for transmission level NVH analysis. The multi-stage system level model is used to study key design parameters like EM force coupling with structural modes, motor mounting design, DU ribbing and stiffness optimization. Key design concepts and parameters that have most influence on radiation sound power from DU are identified, and subsequently optimized for improved noise performance of Bolt EV.
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CitationHe, S., "NVH Design, Analysis and Optimization of Chevrolet Bolt Battery Electric Vehicle," SAE Technical Paper 2018-01-0994, 2018, https://doi.org/10.4271/2018-01-0994.
Data Sets - Support Documents
|Unnamed Dataset 1|
- Wellmann , T. , Govindswamy , K. , and Tomazic , D. Impact of the Future Fuel Economy Targets on Powertrain, Driveline and Vehicle NVH Development SAE Int. J. Veh. Dyn., Stab., and NVH 1 2 428 438 2017 10.4271/2017-01-1777
- Yu , B. , Fu , Z. , and Juang , T. Analytical Study on Electric Motor Whine Radiated from Hybrid Vehicle Transmission SAE Technical Paper 2017-01-1055 2017 10.4271/2017-01-1055
- Tang , C. , Limsuwan , N. , Chandrasekhar , N. , Ma , Z. et al. Current Harmonics Impact on Torque Ripple in PM Machine Drive System SAE Technical Paper 2017-01-1231 2017 10.4271/2017-01-1231
- Valeri , F. , Lagodzinski , J. , Reilly , S. , and Miller , J. Traditional and Electronic Solutions to Mitigate Electrified Vehicle Driveline Noises SAE Technical Paper 2017-01-1755 2017 10.4271/2017-01-1755
- Tanabe , Y. , Watanabe , M. , Hara , T. , Hoshino , K. et al. Transient Vibration Simulation of Motor Gearbox Assembly Driven by a PWM Inverter SAE Technical Paper 2017-01-1892 2017 10.4271/2017-01-1892
- Arabi , S. , Steyer , G. , Sun , Z. , and Nyquist , J. Vibro -Acoustic Response Analysis of Electric Motor SAE Technical Paper 2017-01-1850 2017 10.4271/2017-01-1850
- Taniguchi , M. , Yashiro , T. , Takizawa , K. , Baba , S. et al. Development of New Hybrid Transaxle for Compact-Class Vehicles SAE Technical Paper 2016-01-1163 2016 10.4271/2016-01-1163
- Nakada , T. , Ishikawa , S. , and Oki , S. Development of an Electric Motor for a Newly Developed Electric Vehicle SAE Technical Paper 2014-01-1879 2014 10.4271/2014-01-1879