| 摘要 |
PURPOSE:To promote both functions of a shield and a damping by constituting a damper by increasing the resistivity of a material of conductive bars at a field magnetic pole side in comparison with that of a material of conductive bars at an interpole side. CONSTITUTION:A superconductive rotary electric machine is constituted of a damper 1 consisting of a plurality of conductive bars and a metallic supporting cylinder 1c etc., a superconductive field coil 2 and a coil mounting shaft 3, and the damper 1 forms a squirrel-cage type electric circuit. The damper 1 is equipped with conductive bars 11a of a material having a larger resistivity provided at a magnetic pole side and with conductive bars of a material having a smaller resistivity provided at an interpole side. Accordingly for example, the current to be induced to the damper 1 by a fluctuating field applied in the field direction passes the conductor bars 11b with low resistance provided at the interpole side, so that the current value increases and the shield effect is effective. Accordingly, the value of the field current rising at the time of power fluctuation is controlled, and the superconductive state is maintained. |
