Patent ID: 9638774
Date: 2017-05-02
CPC Classifications: G01R,H01F,H02J

Claim:
1. An MRI type superconducting magnet system comprising: a coil winding for generating a magnetic field in a normal and in a superconducting state; a power supply for charging and discharging the coil windings, wherein the power supply includes a resistor, a diode, or both a resistor and a diode to dissipate energy while discharging the coil winding; a Persistent mode Current Switch (PCS) configured to form an electrically closed-loop with the coil windings while in a superconducting state; and a combination of a diode and a controllable-voltage element or a diode and a controllable-resistance element connected across the coil winding terminals, wherein controlling the voltage across the controllable-voltage element or the resistance of the controllable-resistance element controls discharge voltage of the coil winding.