The temperature rise characteristic analysis technique of the traction motor for EV application

The traction motor used in Electric Vehicle and Railway is required to the compact size and light weight because the Space itself for traction motor of the vehicle is narrow or limited. Therefore the thermal stability of small motors should be considered as the most important design factor. The air or water is employed as coolants in cooling method. The thermal stability surely is verified by the fluid & the heat transfer analysis by CFD(Computational Fluid Dynamics) and the thermal equivalent circuit method. The simulation results from two methods are compared to test data and validated.