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: Contribution to journalArticlepeer-review

53 Citations (Scopus)
1670 Downloads (Pure)


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 anti-demagnetization 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
Pages (from-to)1468-1478
Number of pages11
JournalIEEE Transactions on Energy Conversion
Issue number4
Early online date31 May 2017
Publication statusPublished - Dec 2017


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