Power Loss and Thermal Analysis of a MW High-Speed Permanent Magnet Synchronous Machine

Yue Zhang, Sean McLoone, Wenping Cao, Fengyi Qiu, Chris Gerada

Research output: Journal PublicationArticlepeer-review

105 Citations (Scopus)


High-speed permanent magnet synchronous machines (PMSMs) have attracted much attention due to their high power density, high efficiency, and compact size for direct-drive applications. However, the consequent power loss density is high, and hence heat dissipation is a major technical challenge. This is particularly the case for high-speed operation. In this paper, a MW level high-speed PMSM is designed and its electromagnetic and mechanical power losses comprehensively investigated using finite element analysis. The transient machine demagnetization performance is studied, and a composite rotor structure is proposed to improve machine antidemagnetization capability. The temperature distribution of the proposed high-speed PMSM is also analyzed using a fluid-thermal coupling method with calculated power loss. Experiments conducted on a prototype of the high-speed PMSM demonstrate the effectiveness of the numerical models developed and validate the results obtained.

Original languageEnglish
Article number7936615
Pages (from-to)1468-1478
Number of pages11
JournalIEEE Transactions on Energy Conversion
Issue number4
Publication statusPublished - Dec 2017


  • Demagnetization
  • finite element method
  • high speed PM machine
  • magnetic field
  • power loss
  • thermal analysis

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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