Direct Reuse of Rare Earth Permanent Magnets - Wind Turbine Generator Case Study

Stig Högberg, Thomas Stigsberg Pedersen, Flemming Buus Bendixen, Nenad Mijatovic, Bogi Bech Jensen, Joachim Holbøll

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A novel recycling strategy, direct reuse, for rare earth permanent magnets were investigated in this article. Direct reuse uses small, unit-cell (segmented) magnets to replace the normal solid pole configuration, which is not directly reusable due its unique shape and size. The unit-cell magnets are directly reusable due to their standard shape and size, and direct reuse effectively bypasses a number of the expensive and energy intensive processes of normal recycling. Based on a model of a 3 MW direct drive wind turbine generator, the finite element studies concluded that normal values of average output torque, torque ripple, and cogging torque are achievable with this segmentation technique. The influence of the thickness of the adhesive layer was analyzed, and a pole-shaping technique was applied to improve the torque characteristics. The simulation models were verified experimentally
Original languageEnglish
Title of host publicationProceedings of 2016 XXII International Conference on Electrical Machines
PublisherIEEE
Publication date2016
Pages1625-1629
ISBN (Print)9781509025381
DOIs
Publication statusPublished - 2016
Event2016 XXII International Conference on Electrical Machines - SwissTech Convention Center, Lausanne, Switzerland
Duration: 4 Sep 20167 Sep 2016

Conference

Conference2016 XXII International Conference on Electrical Machines
LocationSwissTech Convention Center
Country/TerritorySwitzerland
CityLausanne
Period04/09/201607/09/2016

Keywords

  • Direct drive wind turbine generator
  • Direct reuse
  • Experimental verification
  • Finite element analysis
  • Recycling REPM

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