Superconducting shielded core reactor with reduced AC losses

Details Superconducting shielded core reactor with reduced AC losses Superconducting shielded core reactor with reduced AC losses

2006-04-04

2006-04-04

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Superconductor protective circuits

C361S141000

Reexamination Certificate

active

07023673

ABSTRACT:
A superconducting shielded core reactor (SSCR) operates as a passive device for limiting excessive AC current in a circuit operating at a high power level under a fault condition such as shorting. The SSCR includes a ferromagnetic core which may be either closed or open (with an air gap) and extends into and through a superconducting tube or superconducting rings arranged in a stacked array. First and second series connected copper coils each disposed about a portion of the iron core are connected to the circuit to be protected and are respectively wound inside and outside of the superconducting tube or rings. A large impedance is inserted into the circuit by the core when the shielding capability of the superconducting arrangement is exceeded by the applied magnetic field generated by the two coils under a fault condition to limit the AC current in the circuit. The proposed SSCR also affords reduced AC loss compared to conventional SSCRs under continuous normal operation.

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patent: 5694279 (1997-12-01), Mumford
patent: 5892644 (1999-04-01), Evans et al.
patent: 5930095 (1999-07-01), Joo et al.

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