Power Loss Analysis in Thermal Design of Permanent Magnet Machines: A Review

Rafal Wrobel, Phil Mellor, Mircea Popescu, David Staton

Research output: Contribution to journalArticle (Academic Journal)peer-review

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This paper reviews recent developments in power loss analysis applicable, but not limited to, the thermal design of permanent magnet (PM) machines. Accurate and computationally efficient loss prediction is an essential element in thermal analysis of electrical machines, and has become an increasingly important part of the machine design process.

The continuous drive toward ‘more electric’ technologies has resulted in a need for a more comprehensive and detailed design approach, where various multi-physics and multi-disciplinary effects are accounted for. This ‘design for application’ methodology relies strongly on the advancements and evolution of the existing theoretical and experimental design techniques to satisfy the evermore-demanding machine design requirements. The thermal behaviour and efficiency of the power conversion are essential performance measures, in the ‘design for application’ approach.

An overview of the challenges and limitations regarding power loss analysis in the context of thermal design of electrical machines is provided in this paper. All of the major loss components associated with the active parts of a machine assembly are discussed.
Original languageEnglish
Pages (from-to)1359-1368
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number2
Early online date12 Oct 2015
Publication statusPublished - Apr 2016


  • Power loss analysis
  • thermal analysis
  • electrical machines
  • design methodology
  • multi-physics analysis

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