High speed machines are gaining popularity in more and more applications. Besides permanent magnet (PM) machines, switched reluctance machines (SRMs) are very competitive candidates for high-speed applications in high-temperature environments due to their single material rotor without PMs. However, the conventional rotor geometries of SRMs are not suitable for the ultra-high speed applications. In this article, a novel high-strength, high-torque-density, high-efficiency rotor design for the ultra-high speed SRMs is proposed. First, a three-dimensional finite-element analysis is conducted to calculate the von-Mises stress distribution of the proposed rotor and shaft. Then, in order to improve the bonding and robustness of the design, proper high-strength adhesives are used and modeled based on the cohesive zone model. A parametric study is conducted to find the optimal length of the rotor stack. A thermal stress case study is also conducted. Finally, several prototypes are built to validate the manufacturing feasibility of the proposed design.

中文翻译：

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超高速开关磁阻电机的高强度转子设计

高速机器在越来越多的应用中越来越受欢迎。除了永磁 (PM) 电机之外，开关磁阻电机 (SRM) 是高温环境中高速应用的非常有竞争力的候选者，因为它们的单材料转子没有 PM。然而，SRM 的传统转子几何形状不适合超高速应用。在本文中，提出了一种用于超高速 SRM 的新型高强度、高扭矩密度、高效转子设计。首先，进行三维有限元分析以计算所提出的转子和轴的 von-Mises 应力分布。然后，为了提高设计的粘合性和稳健性，使用适当的高强度粘合剂并基于内聚区模型进行建模。进行参数研究以找到转子组的最佳长度。还进行了热应力案例研究。最后，构建了几个原型来验证所提出设计的制造可行性。