Quench-protecting electrical circuit for a superconducting magne

Details Quench-protecting electrical circuit for a superconducting magne Quench-protecting electrical circuit for a superconducting magne

1996-09-04

1998-03-24

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Superconductor protective circuits

361115, H02H 900

Patent

active

057319391

ABSTRACT:
A quench-protecting superconductive-magnet electrical circuit. An impregnated superconductive-switch wire is coupled to the leads of a cryostable superconductive-coil assemblage having series-coupled coil portions. Series-coupled fan-in resistive heaters are also coupled in parallel with corresponding coil portions and are positioned thermally proximate the superconductive-switch wire. Fan-out resistive heaters are coupled in parallel with corresponding coil portions and are positioned thermally proximate corresponding coil portions. A local quench in one coil portion activates its corresponding fan-in resistive heater which quenches the superconductive-switch wire which activates all of the fan-out resistive heaters which globally quenches all of the coil portions thereby preventing local quench damage.

REFERENCES:
patent: 3925707 (1975-12-01), Bhate et al.
patent: 4764837 (1988-08-01), Jones
patent: 4956740 (1990-09-01), Williams
patent: 4977039 (1990-12-01), Onishi et al.
U.S. Patent Application Serial No. 08/565,140, filed Nov. 30, 1995, by Gross et al., entitled "Superconducting Magnet Electrical Circuit Having Voltage and Quench Protection".
U.S. Patent Application Serial No. 08/565,139, filed Nov. 30, 1995, by Gross, entitled "Superconducting Magnet Electrical Circuit Offering Quench Protec-Tion".
U.S. Patent Application Serial No. 08/514,332, filed Aug. 11, 1995, by Salasoo, entitled "Electrical Circuit for Protecting a Superconducting Magnet During a Quench".

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