| 摘要 |
PURPOSE:To make the correct measurement of the liquid surface possible even though a rotor is swaying, by using a liquid-surface meter to which the filament terminals for measuring voltages are provided at the both ends of a super-conductive filament and at the central position of a tank. CONSTITUTION:A tank 4 to reserve coolant 1 for cooling a super-conductive-field winding 3 is provided in the inside of a rotor 2. The coolant 1 is centrifugally pushed to the tank wall by the rotation and a space 6 for reserving gas of the coolant 1 is formed. A superconductive filament 8A is provided so that it passes a center 12 in the inside of the tank 4, and filament terminals 14A-14C for measuring voltages are provided at both ends of the filament 8A and at the position corresponding to the center 12, thereby a liquid-surface meter is formed. Therefore, when the height of the liquid surface 7 of the coolant 1 is measured, the voltages V1 and V2 can be measured, and the correct measurement can be made without the influence of the sway of the rotor 2 when it is rotating. |
