Improving the thermal performance of rotary and linear air-cored permanent magnet machines for direct drive wind and wave energy applications

Markus A. Mueller, Joseph Burchel, Yew Chuan Chong, Ozan Keysan, Alasdair McDonald, Mike Galbraith, Estanislao Juan Pablo Echenique Subiabre

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8 Citations (Scopus)
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Air-cored machines offer benefits in terms the elimination of magnetic attraction forces between stator and rotor. With no iron in the stator there is not a good thermal conduction path for heat generated by Joule losses in the stator winding. Results from both models and experimental tests are provided in this paper to investigate different methods of cooling air-cored windings, including natural air-cooling, direct liquid cooling and the use of heat pipes.
Original languageEnglish
Number of pages9
JournalIEEE Transactions on Energy Conversion
Early online date14 Nov 2018
Publication statusE-pub ahead of print - 14 Nov 2018


  • PM machines
  • direct drive
  • air-cored windings
  • wind energy
  • wave energy
  • linear machines
  • thermal performance

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