Recent progress of development of 70 MW class superconducting generators

The authors describe the R&D program and recent results for the 70 MW-class superconducting generator called the model machine in the Super-GM project based on an eight-year program started in FY 1988. Super-GM (Engineering Research Association for Superconductive Generation Equipment and Materials) has been researching and developing three kinds of 70 MW-class model machines. The R&D objectives are to research basic elemental techniques for components of superconducting generators and to conduct technical development by using various partial models for the rotor and stator in the first half of the eight-year period, and then to develop 70 MW-class model machines in the latter half of that period. In FY 1991, the design methods and manufacturing techniques for the 70 MW-class model machines were successfully verified.>