The heat management of the in-wheel motor is the key challenge for an electric direct-drive in-wheel traction system. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the motor under the effects of motor spee...
The heat management of the in-wheel motor is the key challenge for an electric direct-drive in-wheel traction system. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the motor under the effects of motor speed and heat generation. In the air cooling structure for the in-wheel motor, a contact surface on the housing is provided with a portion having protrusions to increase the heat transfer area. The cooling performance for the housing geometry having protrusions in the circumferential direction was investigated and analyzed. Therefore, we checked the feasibility of the air cooling system for in-wheel motor cooling.