Comparison of the Reluctance and Permanent Magnet Synchronous Machine operating at High Temperatures

The paper describes a 3D analysis of the thermal field in a permanent magnet synchronous machine and a reluctance synchronous machine enabling work at high internal temperature (HT° machine). The 3D coupled electromagnetic-luid-thermal model of projected machine is created to obtain the distribution of thermal field and air flow and to calculate the average temperature of the most sensitive parts such as coils and permanent magnets. The influence of the surface state of the machine housing on its heating is examined. The points of the highest temperature inside analyzed machine are localized too. The comparison of thermal properties and the possibility of working at high temperatures for both types of machines was carried out.