| 摘要 |
PURPOSE:To provide a superconducting coil system capable of avoiding a DC breaking operation impossible region near a zero current point accompanied with the switching operation of a polarity transfer switch without applying a voltage higher than necessary to a superconducting coil when interrupting a direct current. CONSTITUTION:A main circuit consisting of a power supply equipment 6 is provided, which excites a superconducting coil 2 through a superconducting coil 2 having a quenching detector 1, a current detector 3 of the superconducting coil 2, and a parallel circuit of a DC circuit breaker 4 and a resistor 5. Moreover, a commutating circuit 13 which connects in parallel a commutating capacitor 10 having a polarity transfer switch 7 connected in parallel to a DC circuit breaker 4, a charging equipment 8 and a voltage detector 9 as well as a series configuration of a first switch 11 and a commutating reactor 12 to the polarity transfer switch 7, and a controller 14 for performing overall operation, control, protection and monitoring are provided. |
