Present status and future trends of R&D for HTS rotational machines in Japan

• R&D statuses of various HTS rotating machines developed in Japan are overviewed.
• Design studies of various types of HTS wind power generators conducted in Japan are assessed.
• Based on the present R&D statuses, future technical trends of HTS machines are discussed.
• Introduction of iron cores into HTS windings drastically reduces amount of HTS wires and cost of HTS machines.

Various HTS rotating machines, from multiple MW class to several 10 kW class, are being developed in Japan. R&D statuses of those machines are reviewed. Design studies of various types of HTS wind power generators are also conducted in Japan and their merits and demerits are discussed. Based on the present R&D statuses, future technical trends of HTS machines are discussed.