Performance Evaluation of an In-Wheel Motor Cooling System in an Electric Vehicle/Hybrid Electric Vehicle

Performance Evaluation of an In-Wheel Motor Cooling System in an Electric Vehicle/Hybrid Electric Vehicle

Blog Article

High power and miniaturization of motors in an in-wheel drive system, which is installed inside the wheels of a vehicle, are required for directly driving the wheels.In addition, an efficient cooling system is required to ensure high driving performance and durability.This study experimentally evaluated the heat dissipation performance of a 35-kW-class large-capacity in-wheel motor equipped with an internal-circulation-type oil-cooling system that exhibits SPINNERS high cooling performance and can be easily miniaturized to this motor.

Temperatures of the coil and stator core of cooling systems with and without a radiator were measured in real time under in-wheel motor driving conditions.It was found that operating the cooling system at a continuous-rating maximum speed without the radiator was difficult.We confirmed that under continuous-rating base speed and continuous-rating maximum KERATIN COND speed driving conditions, the cooling system with the radiator showed thermally stable operation.

Furthermore, under maximum-rating base speed and maximum-rating maximum speed driving conditions, the cooling system with the radiator provided additional driving times of approximately 22 s and 2 s, respectively.