| 摘要 |
PURPOSE:To discharge an accumulated energy in a short time and reduce the size of an equipment by a method wherein a resistor to which a switch is connected in parallel is connected to the exciting input end of a magnet coil and a contol circuit which outputs a command for regnerative driving of an exciting source and a command for opening the switch given above. CONSTITUTION:A superconducting coil 1, an exciting source 2 and a protecting resistor 4 are connected in series and a switch 3 is connected to the protecting resistor 4 so as to short circuit it. A quench detecting signal given by a quench detecter 5 is put into a control circuit 6 which is so composed that it outputs a command for regenerative driving to the exciting source 2 and at the same time a command for opening to the switch 3 in accordance with the input quench detecting signal. When quench occurs in the superconducting magnet 1, the exciting source 2 is driven in regenerative manner and at the same time the switch is opened and an accumulated energy is consumed by the protecting resistor 4 and fed back to the AC source and discharged quickly. |
