| Summary: | With the decreasing in volume and increasing of power density, the accurate estimation of permanent magnet synchronous motor in terms of temperature rise has become a problem in the design process. In order to solve this problem, a permanent magnet synchronous motor was taken as a research object, three-dimensional flow and heat transfer coupling simulation model of the motor was solved by using multiple reference frame model and finite volume method based on the basic assumptions and solution conditions. The internal fluid flow characteristics, the whole temperature field, the stator and rotor temperature field and the convection heat transfer coefficient distribution were analyzed. The research methods and results can provide guidance for the thermal design of permanent magnet synchronous motor.
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