A high-speed squirrel-cage induction machine requires a totally different design compared to the traditional squirrel-cage industrial motor because of the mechanical limitations caused by the high speed. This results in a more complicated rotor construction and expensive material selection, and sets higher standards for the manufacturing precision. The objective of this paper is to demonstrate the design aspects, material selection, and manufacturing of a squirrel-cage rotor for high-speed applications. In this paper, the rotor dimensioning approach based on equations and data analysis is presented. Rotor material selection and construction topology influence on the electrical machine design are discussed. The results are illustrated with the design of a 6-kW, 120 000-r/min induction machine for a turbo circulator. The influence of rotor parameters on the electromagnetic performance of the designed machine is demonstrated. Mechanical stresses for different topologies are studied with finite-element method analysis. Several manufacturing methods for producing a high-precision rotor are described and compared. The presented rotor design approach, which enables high electromagnetic performance and robust construction, is verified by the testing of a prototype.

中文翻译：

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用于高速应用的鼠笼转子设计和制造

由于高速引起的机械限制，与传统鼠笼式工业电机相比，高速鼠笼式感应电机需要完全不同的设计。这导致更复杂的转子结构和昂贵的材料选择，并为制造精度设定了更高的标准。本文的目的是展示用于高速应用的鼠笼式转子的设计方面、材料选择和制造。在本文中，提出了基于方程和数据分析的转子尺寸标注方法。讨论了转子材料选择和结构拓扑对电机设计的影响。结果通过设计用于涡轮循环器的 6 千瓦、120 000 转/分钟感应电机来说明。论证了转子参数对设计电机电磁性能的影响。使用有限元方法分析来研究不同拓扑结构的机械应力。描述和比较了几种用于生产高精度转子的制造方法。所提出的转子设计方法可实现高电磁性能和坚固的结构，并通过原型测试得到验证。