Torque Ripples in Electric Vehicle Drive Quality in Open and Closed Loop Control Environments
2021-01-0981
04/06/2021
- Event
- Content
- Torque ripple of electric motors is a unique feature in Battery Electric Vehicles (BEV) affecting vehicle performance. It is one of the disturbances from electric motors resulting in unpleasant vehicle fore-aft vibrations at specific vehicle speeds. In this study, the torque ripple modeling and simulation procedure has been developed. Critical modeling contents in a full vehicle ADAMS model and a brief overview of the propulsion control are described. Analytical data sets for torque fluctuations (torque ripple) from a couple of different sources are incorporated in the model. The CAE simulation procedure was applied to simulate vehicle performances of a General Motors Battery Electric Vehicle in an early vehicle design phase. Torque ripple phenomena are simulated both in an open-loop and closed-loop propulsion control environment to see how much vehicle fore-aft vibration suppression is achieved by the motor control methods. The simulated results show a good agreement with measurements from previous vehicle programs. A few parameter variation studies explain the physics behind torque ripple phenomena. Based on the results, balancing design parameters for torque ripple performance is also discussed.
- Pages
- 6
- Citation
- Hong, H., Xing, X., and Morris, R., "Torque Ripples in Electric Vehicle Drive Quality in Open and Closed Loop Control Environments," SAE Technical Paper 2021-01-0981, 2021, https://doi.org/10.4271/2021-01-0981.