Feasibility study of 5MW superconducting wind turbine generator

Asger Bech Abrahamsen, Bogi Bech Jensen, E. Seiler, Nenad Mijatovic, Victor Manuel Rodriguez Zermeno, Niels Hessel Andersen, Jacob Østergaard

Research output: Contribution to journalJournal articleResearchpeer-review


The feasibility of installing a direct drive superconducting generator in the 5MW reference offshore wind turbine of the National Renewable Energy Laboratory (NREL) has been examined. The engineering current densities Je obtained in a series of race track coils have been combined with magnetization measurements to estimate the properties of suitable field coils for a synchronous generator, which is more light weight than the conventional used combination of a gear box and a fast rotating generator. An analytical model and finite element simulations have been used to estimate the active mass of generators with varying number of poles. A 24 pole machine with an outer diameter of 4.2m and active length and mass of 1.2m and 34 tons is suggested possible, if a Je=300A/mm2 can be obtained in B=4T pointing to an operation temperature around 40K.
Original languageEnglish
JournalPhysica C: Superconductivity and its applications
Issue number21-22
Pages (from-to)1464-1469
Publication statusPublished - 2011
EventThe 23rd International Symposium on Superconductivity - Tsukuba (JP), 1-3 Nov
Duration: 1 Jan 2010 → …


ConferenceThe 23rd International Symposium on Superconductivity
CityTsukuba (JP), 1-3 Nov
Period01/01/2010 → …


  • Superconducting generator
  • Offshore wind turbine
  • Race track coils


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