Due to their harsh operational environment, losses and vibrations are vital performances in the design stage of double-canned induction motors (IM) for the submergible rim-driven thruster (SRDT) applications. However, the traditional design approaches cannot be directly applied to that family of IMs as more influential factors (i.e., the flat structure, large diameters, eddy current losses in the cans, and the local saturation effect) should be attentively considered. This study presents a robust electromagnetic design procedure for double-canned IM, combining the traditional magnetic circuit method (MCM) and the finite element method (FEM). Firstly, the improved MCM is adopted to determine the size of the machine, including the stator outer and inner diameters, the core length, etc. Moreover, the reasonable ranges of the critical parameters are obtained. Afterward, considering the losses and electromagnetic forces, time-stepping FEM is used to perform an excellent analysis of the essential parameters of design, and the thermal and stress analyses are coupled to evaluate the optimal design schemes. A design example of a 3 kW double-canned IM is presented, and the prototype is manufactured. Loss and noise experiments are performed to verify the effectiveness of the given procedure.

中文翻译：

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用于潜水轮辋驱动推进器的双屏蔽 IM 的稳健电磁设计，以减少损失和振动

由于其恶劣的操作环境，损耗和振动是用于潜水式边缘驱动推进器 (SRDT) 应用的双屏蔽感应电机 (IM) 设计阶段的重要性能。然而，传统的设计方法不能直接应用于该系列的 IM，因为应仔细考虑更多的影响因素（即扁平结构、大直径、罐中的涡流损耗和局部饱和效应）。本研究结合传统的磁路法 (MCM) 和有限元法 (FEM)，提出了一种稳健的双屏蔽 IM 电磁设计程序。首先采用改进的MCM来确定电机的尺寸，包括定子外径和内径、铁芯长度等。此外，获得了关键参数的合理范围。然后，考虑到损耗和电磁力，使用时间步长有限元法对设计的基本参数进行了出色的分析，并结合热分析和应力分析来评估优化设计方案。提出了一个 3 kW 双罐 IM 的设计实例，并制造了原型。执行损失和噪声实验以验证给定程序的有效性。