Affiliation: | aInstitute of Electromagnetics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland bSINTEF Energy Research, NO-7465 Trondheim, Norway cSkoda Vyzkum, Tylova 57, CZ-31600 Plzen, Czech Republic dColumbus Superconductors, Corso Perrone 24, I-16152 Genova, Italy |