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Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator

Abstract

Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in full-scale generators, tests of different winding methodologies and techniques are needed. In this paper, we describe in detail the steps used to wind a racetrack coil with a length of 1 m and a width of 0.5 m out of 4.5 km of MgB2 superconducting tape. The width corresponds to a full-scale pole of a 10 MW generator, whereas the length of the straight section is shorter than the corresponding full-scale pole. The coil was built up of 10 double pancake coils. Each double pancake coil was wet-wound using a semi-automatic winding process, where Stycast 2850 was applied directly to the MgB2 tape without any other dedicated electrical insulation. The strengths and weaknesses of the winding process are discussed and compared to the dry-winding method.

Category

Academic article

Client

  • EC/FP7 / 308974
  • Research Council of Norway (RCN) / 193823

Language

English

Author(s)

Affiliation

  • SINTEF Energy Research / Elkraftteknologi
  • Norwegian University of Science and Technology
  • Technical University of Denmark

Year

2018

Published in

IEEE Transactions on Applied Superconductivity (TAS)

ISSN

1051-8223

Publisher

IEEE

Volume

28:5207105

Issue

4

Page(s)

1 - 5

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