Comparing different materials for rotor-can in flooded generators

Faisal Wani, Jianning Dong, Avinash Yadav, Henk Polinder

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
91 Downloads (Pure)


Flooded Generators have been proposed as a possible solution to eliminate the risks due to the seal failure, and improve cooling in tidal stream turbine generators. In a flooded generator, the stator-rotor gap is filled with the seawater; this poses a serious corrosion risk to the material inside the generator. For this reason, a can or a protective shield is used on the stator and the rotor surfaces in the watergap. This paper compares different rotor-can materials based on the eddy current losses in the rotor-can, and its impact on the temperature inside the generator. Due to the flooded gap, the temperature rise in magnets, because of rotor-can eddy current losses is much lower than in a corresponding airgap machine. Thus from the thermal point of view, the choice of the rotor-can material is less critical in a flooded generator than in an airgap generator.
Original languageEnglish
Title of host publicationProceedings 2018 XIII International Conference on Electrical Machines (ICEM)
Place of PublicationPiscataway, NJ, USA
ISBN (Electronic)978-1-5386-2477-7
ISBN (Print)978-1-5386-2478-4
Publication statusPublished - 2018
EventICEM 2018: 13th International Conference on Electrical Machines - Alexandroupoli, Greece
Duration: 3 Sept 20186 Sept 2018


ConferenceICEM 2018: 13th International Conference on Electrical Machines
Abbreviated titleICEM

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project  Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Tidal stream turbines
  • Flooded Generators
  • Permanent Magnets
  • Rotor-can
  • eddy current losses


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