| 摘要 |
PURPOSE:To avoid the excessive overload state of a coil or an excitation power source enabling to maintain other normal coil group under a rated current in the case that one coil is quenched and discharged during a superconductive coil system operation only by adding a simple circuit based upon a conventional coil protection circuit. CONSTITUTION:When a coil 1-1 is quenched in a circuit unit B-1, coil energy is discharged through a discharge resistance 2-1 cutting a DC breaker 3-1 and an auxiliary DC breaker 5-1 off simultaneously. At the same time, DC breakers 3-1-3-n are cut off in circuit units B-2-B-n. In this case, the coil energy of each normal coil 1-2-1-n is discharged by each discharge resistance 2-2-2-n and each control resistance 6-2-6-n. [Refer to Drawings (b) and (c)]. After each coil 1-2-1-n is discharged for a definite time t2-tn respectively, each DC breaker 3-2-3-n is closed again. The value of each control resistance is extremely smaller than the value of each discharge resistance. |
