A thermal dissipation characteristics of integrated in-wheel motor using SiC power module

In-wheel motor is one of the expected electric vehicle technologies which has superiority in the vehicle control aspects. However, the integrated in-wheel motor in which the inverter is integrated with the motor makes thermal problems because of the reduction of cooling area. This paper analyses a cooling system of the inverter integrated in-wheel motor and considers the operating conditions of the integrated SiC power module. This paper also shows the effectiveness of the cooling system using the motor case as the heat sink of the inverter and it can keep the temperature under maximum junction temperature of SiC power devices.