Thermal Analysis Techniques of Finite Formulation Method and the Application on Permanent Magnet Machines

Publication Type:
Journal Article
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, 2017, 37 pp. 152 - 161
Issue Date:
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© 2017 Chin. Soc. for Elec. Eng. The working performance of a permanent magnet synchronous machine (PMSM) is directly decided by the temperature rise distribution, thus making thermal analysis a key point in machine design. According to the fundamental principles of the finite formulation method (FFM) and the heat transfer theory, the implementation methods of the common boundary conditions in thermal analyses were presented. A FFM based high-precision model of the convective heat transfer boundary was established and illustrated in this paper. The temperature field of a 2D standard compute instance was analyzed by the original convective model and the modified one exhibited in this paper. Calculation Errors were discussed that confirmed the study. The 3-D temperature field distribution of a 2.1kW PMSM with an amorphous alloy (AA) core was analyzed by FFM and FEM with the same set of grids. Through the analyses between numerical results and the experimental ones, the superiority and the reliability of the FFM based thermal analysis techniques were confirmed. This paper has a reference value for the thermal analyses of PMSMs utilizing AA cores.
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