A superconducting rotating machine, a superconducting coil, and a superconducting generator for use in a lighting equipment using solar energy

摘要

A superconducting rotating machine (10) which comprises: a cylindrical frame (12); a stator (14) installed integrally around an inner periphery of said cylindrical frame, said stator having a plurality of permanent magnet rings (14a) stacked longitudinally around an inner periphery of said cylindrical frame, said each permanent magnet ring including a plurality of arcuate shaped permanent magnets having an outer surface with a radius approximately equal to the radius of the inner surface of said cylindrical frame, said arcuate shaped permanent magnets being positioned in said cylindrical frame with the outer arcuate surfaces thereof engaging said inner surface of said cylindrical frame; a stator coil (42) provided around said inner surface of said cylindrical stator, said stator coil having a primary coil (44) and a secondary superconducting coil (46); a rotor (20) arranged concentrically and rotatably within said stator in juxtaposed spaced relationship to the inner surface of said stator with a cylindrical clearance between the inner periphery of the stator and the outer periphery of said rotor, said rotor including a non-magnetic shaft (22), said rotor having a plurality of permanent magnet rings stacked longitudinally around said non-magnetic shaft, each said ring having a plurality of arcuate shaped permanent magnets (26a); a pair of non-magnetic covers provided at both end portions of said stator frame, each said cover having a bearing for rotatable mounting of said shaft; an auxiliary motor provided integrally at one end portion of said rotatable shaft. The secondary coil comprises a superconducting alloy of Cu, Nb3Sn, V3Ga, V3Ge, Bi, Ca, CuO and Sr. The machine may be used in a solar powered generator. IMAGE