| 摘要 |
PURPOSE:To obtain a superconducting motor, which can operate stably without causing quenching, by forming a refrigerant path in a column separating insulator such that the exposing ratio of a superconductor to the refrigerant path is smaller for the axial groove than for the circumferential groove thereby making uniform the cooling capacity of the refrigerant at each part of a winding structure and suppressing temperature rise of the refrigerant. CONSTITUTION:Annular grooves 2 are formed in the outer surface of a winding supporting tube 1. A winding structure 3 comprising a superconductor 12 and an electric insulator provided with a refrigerant passage is contained in the groove 2. Thermal transmission of the refrigerant at the axial winding part, where the superconductor 12 extends in parallel with the center of rotation of the winding supporting tube 1, is lower than that at the circumferential winding part where the superconductor 12 extends in the circumferential direction. Exposure rate at the axial winding part is thereby set larger than that at the circumferential winding part by an amount corresponding to the difference of thermal transmission. According to the constitution, entire winding structure can be cooled uniformly and a superconducting rotor can operate stably without causing quenching.
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