Building of an Electrical Machine Thermal Model in the Context of a Hybrid Electric Vehicle Global Optimization

The understanding of the thermal phenomena in an Electrical Machine is significant because it influences the performances of the machine and its lifetime. In the context of Hybrid Electric Vehicles (HEV) sizing, it also impacts the performances of the entire vehicle. The paper describes the building of a robust thermal circuit model dedicated to water-cooled electrical machines as those used in HEV. A finite element analysis is used to set the thermal parameters of a lumped parameter network. The sensitivity of the thermal parameters is analysed.