1. Current status of research & development of high-temperature superconducting moto for ship propulsion;Umemoto;J. Cryo. Soc. Jpn.,2012
2. Development of 1 MW-class HTS motor for podded ship propulsion system;Umemoto;J. Phys.: Conf. Ser.,2010
3. Private communication form K. Umemoto and http://www.khi.co.jp/english/news/detail/20130529_1e.html.
4. Development and test of an axial flux type PM synchronous motor with liquid nitrogen cooled HTS armature windings;Sugimoto;J. Phys. Conf. Ser.,2008
5. Development of high-temperature superconducting motor for automobiles;Shinzato;SEI Tech. Rev.,2012