Abstract
Electric Vehicle (EV) motors have the problem on heat removal. However, heat transfer characteristics in an EV motor is not clarified. The aim of the present work is to clarify the heat transfer characteristics between the inner high speed rotating cylinder and the stationary concentric cylinder. In the present study, thermal network is introduced. With experimental apparatus, temperature at every part is measured. It is applied to this network. As a result, the number of conditions that have to be given the number of conditions have to be given so as to calculate thermal resistance at every part.becomes clear.
