Mechanical strength analysis and optimization of metallic sleeve in high-speed permanent magnet synchronous machines

Peng Gao, Yuxi Gu, Yuling He, David Gerada, Xiaoyuan Wang, Chris Gerada

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

Metallic sleeves are widely used to ensure the mechanical integrity of rotors in high-speed permanent magnet (PM) synchronous machines (HSPMSM). However, in traditional high-speed rotors, the PMs which are very weak in tensile stress cannot be well protected by sleeves. Furthermore, the material properties of both the sleeves and PMs cannot be fully used. As a result, the high-speed running range of the machines are limited by the mechanical strength for a given rotor size. In this paper, taking a 230-kW 35-kr/min prototype as an example, the mechanical strength issues of the rotor are investigated by analytical method and finite element analysis (FEA). In order to overcome the unbalanced protective effect of the sleeve and make fully use of the materials, an optimal sleeve, as well as an improved rotor structure, is presented. The comparison results show that the optimized sleeve has well balanced protective effect to the PM as well as good utilization of materials, with a resultant increase in maximum speed of nearly 40% with respect to the prototype.

Original languageEnglish
Pages (from-to)343-359
Number of pages17
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume63
Issue number2
DOIs
Publication statusPublished - 2020
Externally publishedYes

Keywords

  • High-speed
  • metellic sleeve
  • permanent magnet synchronous motors (PMSM)
  • stress

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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