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Thermal Modeling of Flux-Switching Permanent-Magnet Machines Considering Anisotropic Conductivity and Thermal Contact Resistance

机译:考虑各向异性电导率和热接触电阻的磁通开关永磁电机的热建模

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摘要

The technique to consider the anisotropic thermal conductivity and thermal contact resistances, as well as convection heat transfer in the air gap in the 3-D thermal modeling of electrical machines, is elaborated in detail and incorporated in the finite-element (FE) package developed with the FE program generator (FEPG) for thermal modeling of the flux-switching permanent-magnet (FSPM) machine. A dissymmetric model to simulate the convection heat transfer in the air gap with different stator and rotor poles is proposed. Moreover, a lumped parameter (LP) thermal model of this machine is also established to calculate the temperatures of the main machine components for comparative study purpose. The calculation results with different methods are verified with experiments. The conclusion highlights the importance of considering thermal contact resistance between windings and the stator core. The proposed model can reduce the total number of mesh comparing with traditional FE thermal model and eliminate complicated establishment of the thermal network and calculation of thermal resistances comparing with LP method.
机译:详细阐述了在电机的3-D热模型中考虑各向异性导热系数和热接触电阻以及气隙中对流传热的技术,并将其纳入开发的有限元(FE)封装中与FE程序生成器(FEPG)一起对磁通量开关永磁(FSPM)机器进行热建模。提出了一种不对称模型,用于模拟定子和转子极不同的气隙中的对流换热。此外,还建立了该机器的集总参数(LP)热模型,以计算主要机器组件的温度,以进行比较研究。实验验证了不同方法的计算结果。结论强调了考虑绕组与定子铁芯之间的热接触电阻的重要性。与传统有限元热模型相比,该模型可以减少网格总数,并且与LP方法相比,可以消除复杂的热网络建立和热阻计算。

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