A 30kVA superconducting generator development and basic tests

A 30kVA superconducting generator (S.G.) has been designed, developed and successfully tested in Korea Electrotechnology Research Institute(KERI) before the end of last year. The design is based on 2-dimensional electromagnetic held analysis of cylindrical coordinate. The field winding of rotor has been wound with superconducting wire of NbTi alloy and tested after assembled with other rotor components. The stator has air-gap type armature windings, which produce higher terminal voltage, and more sinusoidal voltage waveform than conventional iron cored machines. Steady- state open & short-circuit test and lamp load test have been conducted also, The results of tests are given in this paper and compared with design quantities. Moreover the cooling scheme and characteristics of test system is included.