An integrated traction drive with a high speed surface permanent magnet external rotor motor for electric vehicles

Conference · Sun Oct 01 04:00:00 EDT 2023

DOI:https://doi.org/10.1109/ECCE53617.2023.10362087· OSTI ID:2406733

Rallabandi, Vandana ^[1]; Mohammad, Mostak ^[1]; Barua, Himel ^[1]; Chowdhury, Shajjad ^[1]; Ozpineci, Burak ^[1]; Wilkins, Jon ^[1]; Lin, Lianshan ^[1]; Kekelia, Bidzina ^[2]; Cousineau, Emily ^[2]

---

1. ORNL
2. National Renewable Energy Laboratory (NREL)

This work presents the detailed design of an outer rotor motor and integrated drive for passenger electric vehicles. The motor uses non-heavy rare earth permanent magnets and operates at a top speed of 20,000rpm. In-slot ceramic heat exchangers are utilized for the cooling of the windings. The external rotor configuration of the motor leaves a significant amount of space in the stator bore, which is leveraged for the integration of the power electronics. A high speed external rotor motor creates a number of mechanical, thermal and assembly challenges and this work presents detailed thermal, mechanical and rotordynamics analysis.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 2406733
• Country of Publication: United States
• Language: English