Power supply protection circuit for the excitation or des-excitation of a superconducting magnet coil

摘要

The power supply is also intended to be protected during the excitation and de-excitation process. …??This is achieved according to the invention by a voltage monitoring circuit (2b) being provided for monitoring the output voltage at the output terminals of the power supply (1) and by a switch (2c), which is arranged in parallel with the output terminals of the power supply (1), being closed by the voltage monitoring circuit (2b) as soon as the output voltage exceeds a predetermined value in a direction opposite to the supply voltage of the power supply (1). The switch (2c) thus closes in the event of a fault and takes over the current which continues to be driven by the super-conducting coil system (3). …??The invention can advantageously be used, for example, for super- conducting magnets in magnetic resonance imagers. …IMAGE…