Unsettled Technology Areas in Electric Propulsion Systems
EPR2021012
05/24/2021
- Features
- Content
- Electric vehicle (EV) transmission technology—crucial for battery electric vehicles (BEVs) and hybrid electric vehicles (HEVs)—is developing quickly and customers want good performance at a low cost. Single-speed gearboxes are popular in electric drive systems due to their simple and cost-effective configuration. However, multispeed gearboxes are being taken to market due to their higher low-speed torque, dynamic performance, and energy efficiency.Unsettled Technology Areas in Electric Propulsion Systems reviews the economic drivers, existing techniques, and current challenges of EV transmission technology—including torque interruption during shifting; thermal and sealing issues; and noise, vibration, and harshness (NVH). This report discusses the pros and cons for both single-speed and multispeed gearboxes with numerical analysis.
- Pages
- 22
- Citation
- Jiang, Y., "Unsettled Technology Areas in Electric Propulsion Systems," SAE Technical Paper EPR2021012, 2021, https://doi.org/10.4271/EPR2021012.