Development and test of a 300 kW superconducting homopolar generator

A 300 kW superconducting homopolar generator has been jointly developed and tested by the Wuhan Marine Electrical Propulsion Research Institute and the Institute of Electrical Engineering, Academia Sinica. It is a drum-type machine with superconducting excitation and solid brush current collection, 1300 RPM rotating speed, 230-330 V output voltage. The armature rotor diameter is 620 mm, effective length is 600 mm, the average radial magnetic field in the armature region is 0.75 T. During testing, it reached 300 kW nominal output power and worked stably. The design and development of the machine and its main components, together with its test results are presented.