Speaker
Mr
Koichi Omachi
(Graduate School of Engineering, Okayama University of Science)
Description
We have been developing a cryogen-free superconducting induction motor, which is thermally insulated in a single vacuum vessel, which ensures a high thermal insulation and a short distance between stator and rotator. High temperature superconducting coils are embedded in both the stator and the rotator, and the stator is cooled below the critical temperature Tc with a compact cryocooler through solid state thermal conduction. On the other hand, the rotator is cooled below Tc by radiation. This radiant cooling is enabled by the structure that the stator and the rotator have a lot of coaxial fines whose surfaces are coated with ceramics to enlarge emissivity. In this work the efficiency and the validity of the radiant cooling which enables to produce closed superconducting currents on a rotator without current leads are reported.
Primary author
Minaru Kawamura
(O)
Co-authors
Mr
Koichi Omachi
(Graduate School of Engineering, Okayama University of Science)
Mr
Koki Inotani
(Graduate School of Engineering, Okayama University of Science)
Ms
Siti Saqinah Binti Abdul Halim
(Graduate School of Engineering, Okayama University of Science)
