Electricity: electrical systems and devices – Safety and protection of systems and devices – Impedance insertion
Patent
1998-09-04
1999-07-27
Gaffin, Jeffrey
Electricity: electrical systems and devices
Safety and protection of systems and devices
Impedance insertion
361 19, 505850, H02H 900
Patent
active
059300957
ABSTRACT:
A superconducting current limiting device protects an electric circuit from a fault current. The device comprises a magnetically saturable core having saturated and non-saturated states and an input coil for electrically coupling the core to the electric circuit, the input coil drawing a current therethrough so that a magnetic flux is generated in the core due to the current. Further, the core includes a main path for drawing the generated magnetic flux and at least two magnetic paths, a first of the magnetic paths drawing a first portion of the magnetic flux, and a second of the magnetic paths drawing a second portion of the magnetic flux and having a damping element for cancelling at least a fraction of the second portion of the magnetic flux to thereby prevent the core from getting into the saturated state.
REFERENCES:
patent: 4031457 (1977-06-01), Oberbeck
patent: 4117524 (1978-09-01), Parton et al.
patent: 4152637 (1979-05-01), Oberbeck et al.
patent: 5153804 (1992-10-01), Pham et al.
patent: 5355275 (1994-10-01), Goodier et al.
Minseok Joo and Tae Kuk Ko, "Novel Design and Operational Characteristics of Inductive High-Tc Superconducting Fault Current Limiter", IEEE Transactions on applied Superconductivity, vol. 7, No. 2, Jun. 1997, pp. 1005-1008.
Joo Back
Joo Min-Seok
Ko Tae-Kuk
Gaffin Jeffrey
Joo Back
Joo Min-Seok
Sherry Michael J.
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