In order to study temperature field of PMSM used in vehicles,a rated power of 25 kW PMSM in vehicles was taken as the research object,and its three-dimensional solution domain model was built based on the basic theory ofheat transfer.The motor's steady state condition temperature field and the temperature rise changes were derived through simulation analysis.Also,the simulation analysis on temperature rise of the key parts in the motor was carried out under continuous variable power working conditions,for t...