This paper presents a multiphysics modeling and design methodology for high speed permanent magnet synchronous motors (PMSM) for electric traction applications. In this proposed methodology, the electromagnetic, thermal and mechanical fields are coupled together. The electromagnetic model is used to analyze the electromagnetic performances and losses of the PMSM, which then feed the thermal and mechanical models. The thermal model focuses on the machine’s temperature rise while the mechanical model is used to analyze the stress distribution of the PMSM. Combined together, a powerful multiphysics model aimed for the design of high speed PMSMs is achieved. The design results prove that the designed PMSM can simultaneously meet the requirements of high power density, high temperature and high reliability.

中文翻译：

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高速永磁同步电动机的多物理场建模与设计

本文介绍了用于电力牵引应用的高速永磁同步电动机（PMSM）的多物理场建模和设计方法。在此提出的方法中，电磁场，热场和机械场耦合在一起。电磁模型用于分析PMSM的电磁性能和损耗，然后馈入热模型和机械模型。热模型关注机器的温升，而机械模型则用于分析PMSM的应力分布。结合在一起，就可以实现旨在设计高速PMSM的强大的多物理场模型。设计结果证明，所设计的永磁同步电动机能够同时满足高功率密度，高温和高可靠性的要求。