| 摘要 |
PURPOSE:To prevent current consumption by providing a control circuit which functions according to a sampling coil induction coupled with a superconducting coil to feed a current back to a parallel circuit of the superconducting coil and a capacitor. CONSTITUTION:A current 11 flowing through a superconducting coil 7 excites a pole 5a and charges a capacitor 10 such that the collector side terminal of a transistor 9 serves as negative electrode and the positive pole side of a power supply 8 serves as a positive pole. Since the transistor 9 is turned ON at that time, a current 12 is fed back positively from the power supply 8 to the capacitor 10 thus fully charging the capacitor 10. On the contrary, when the current 11 flows reversely through the superconducting coil 7, the tip of the pole 5a serves as S pole and a reverse current is induced in the sampling coil 11 by the current 11. At that time, N pole of a permanent magnet 3 repels to impart clockwise rotary force on a rotor 4. On the other hand, the transistor 9 is turned OFF and the current 12 is not fed back positively to the superconducting coil 7 and the capacitor 10. |
