Recent progress of 70 MW class superconducting generators

This paper describes progress in an 11 year project for research and development of superconducting generators in Japan. Three types of 70 MW class superconducting generators (called model machines) have been manufactured. Rotational tests on two slow response excitation type rotors have been conducted at each factory. The quick response excitation type rotor is in manufacturing and a partial rotor model of the same type has already been tested at the factory. Also, the characteristics of a stator, which is to be commonly used for three rotors at the verification test facility, are measured by combining with one of the slow response excitation type rotors at the factory. Verification tests on the first machine are scheduled to be started early in 1997. Tests on the other two model machines will follow the test on the first one.