1 INTRODUCTION The increase of turbine rated power beyond ≥ 14 MW $$ \ge 14\kern0.22em \mathrm{MW} $$ and the need for alternatives to rare-earth permanent magnet (PM) generators are current trends in the wind energy sector.1 High-temperature superconducting (HTS) field windings in electrically excited synchronous generators are a promising alternative, which has been subject of several research projects in the past decade.2 The HTS excitation is mostly discussed in the context of gearless,...
