Design and testing of a linear generator for wave-energy applications

Neil Hodgins, Ozan Keysan, Alasdair McDonald, Markus Mueller

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)


A linear-generator topology is proposed for wave-energy applications. The main significance of the generator topology is that the relative position of the magnets, copper, and steels has been chosen so that there are no magnetic attraction forces between a stator and a permanent-magnet (PM) translator. The lack of magnetic forces and the modular nature of the generator topology make the manufacture and assembly of the generator easier than a conventional iron-cored PM linear generator. Analytical modeling techniques are described with a genetic-algorithm optimization method. The proposed topology is implemented to an Archimedes-wave-swing wave-energy converter. A 50-kW prototype has been built to prove the concept, and the no-load- and load-test results are presented.
Original languageEnglish
Pages (from-to)2094-2103
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number5
Publication statusPublished - May 2012


  • air-cored winding
  • direct drive
  • linear generator
  • wave energy
  • optmization
  • permanent-magnet (PM) machines
  • power generation


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