Technology Area

Superconducting Systems

Outline of the area

Hiroyuki Ohsaki
Professor, The University of Tokyo

The “superconductive system” is a promising low-carbon technology utilizing the characteristic that the DC electrical resistivity is really zero. It is greatly expected to realize a low-carbon society with drastic energy-saving and to develop novel functions leading to low carbon technologies in various fields such as electricity, transportation, industry, information and so on.

For example, in the electricity field the research and development has so far been conducted in superconductive generators, superconductive electricity cables, superconductive energy storage devices and so on. If their outcomes solve the technological bottlenecks in the superconductive equipment system including cooling functions in the future, the superconductive technologies will have wide range of possibilities of changing the existing electric equipment systems. In addition to technological possibilities of the superconductive motor, it is also possible to achieve far higher efficiency of the energy equipment systems by utilizing high magnetic field superconductive magnets, and by combining it with each cutting-edge elemental technology.

In this ALCA Tech. Area of superconductive systems, we are addressing element technologies for superconductive systems and new conceptual technologies combining with other technologies.They will be adopted by superconductive systems which widely contribute to GHG reduction.


Development of REBCO Fully Superconducting Rotary Machines

Masataka Iwakuma
Professor, Kyushu University

We will conduct the research and development of fully superconducting rotating machines using REBCO coated conductors (CCs.). Applying our original technologies for reduction of ac losses as well as for enhancement of electric current capacity of conductors using plural pieces of REBCO CCs to the armature windings for rotating machines, we will first develop the superconducting armature winding technologies with low AC loss characteristics and a large current capacity. Combination of this superconducting armature with rotating REBCO superconducting field windings makes it possible to install the both windings into the same casing resulting in reduction of the gap distance and constitute it as a compact superconducting synchronous rotating machine of high output power density and the high efficiency. This rotating machine will bring us the realization of the “low-carbon society” through effective energy savings.

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