High power density superconducting rotating machines - Development status and technology roadmap

Kiruba S. Haran, Swarn Kalsi, Tabea Arndt, Haran Karmaker, Rod Badcock, Bob Buckley, Timothy Haugan, Mitsuru Izumi, David Loder, James W. Bray, Philippe Masson, Ernst Wolfgang Stautner

Research output: Contribution to journalReview articlepeer-review


Superconducting technology applications in electric machines have long been pursued due to their significant advantages of higher efficiency and power density over conventional technology. However, in spite of many successful technology demonstrations, commercial adoption has been slow, presumably because the threshold for value versus cost and technology risk has not yet been crossed. One likely path for disruptive superconducting technology in commercial products could be in applications where its advantages become key enablers for systems which are not practical with conventional technology. To help systems engineers assess the viability of such future solutions, we present a technology roadmap for superconducting machines. The timeline considered was ten years to attain a Technology Readiness Level of 6+, with systems demonstrated in a relevant environment. Future projections, by definition, are based on the judgment of specialists, and can be subjective. Attempts have been made to obtain input from a broad set of organizations for an inclusive opinion. This document was generated through a series of teleconferences and in-person meetings, including meetings at the 2015 IEEE PES General meeting in Denver, CO, the 2015 ECCE in Montreal, Canada, and a final workshop in April 2016 at the University of Illinois, Urbana-Champaign that brought together a broad group of technical experts spanning the industry, government and academia.

Original languageEnglish (US)
Article number123002
JournalSuperconductor Science and Technology
Issue number12
StatePublished - Nov 17 2017


  • electric propulsion
  • generators
  • high power density
  • motors
  • superconducting machines

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Ceramics and Composites
  • Metals and Alloys
  • Materials Chemistry
  • Electrical and Electronic Engineering


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