G0610205 Estimation of heat transfer property among parts on EV motor using thermal network method : Development of Object-oriented methodology for temperature distribution within EV motor

Abstract

The aim of this study is to develop the Object-oriented method for deducing temperature on apparatus, understanding how to relate flow with heat transfer characteristics of coaxial cylinders which simulates an Electric Vehicle (EV) motor geometry. There are two experimental apparatuses, for flow visualization and for temperature measurement. In addition, numerical simulation of flow and heat transfer inside model of an EV motor is achieved. Heat transfer on gap and rotor-end part are good agreement with experimental result of which Nu=0.21(TaPr)^<1/4> and Nu=1.26Re^<0.385>, respectively. Moreover, thermal network model in the experimental apparatus is achieved in order to estimate heat transfer characteristics among every part. It is shown that under the detailed physical perspective, complex thermal relation can be reduced into linear relation among elements.