Protective circuit for a power pack for excitation or de-excitat

Details Protective circuit for a power pack for excitation or de-excitat Protective circuit for a power pack for excitation or de-excitat

1988-07-12

1990-05-29

Shoop, Jr., William M.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Superconductor protective circuits

361 8, 361 91, H02H 720

Patent

active

049300342

ABSTRACT:
A protective circuit for a power pack for exciting or de-exciting a superconducting system has a voltage monitoring circuit at the output of the power pack. A switch in parallel to the output of the power pack is closed by the voltage monitoring circuit as soon as output voltage exceeds a predetermined value in a direction opposite a supply voltage of the power pack. During a malfunction, the switch closes and conducts the current which is being driven by the superconducting coil system. The protective circuit can be utilized in devices such as superconducting magnets of a tomography apparatus.

REFERENCES:
patent: 3215896 (1965-11-01), Shattuck et al.
patent: 3614531 (1971-10-01), Oswald
patent: 3845373 (1974-10-01), Totsu et al.
patent: 3947726 (1976-03-01), DeCecco et al.
patent: 3982137 (1976-09-01), Penrod
patent: 4424544 (1984-01-01), Chang et al.
patent: 4586104 (1986-04-01), Standler
patent: 4631621 (1986-12-01), Howell
patent: 4715058 (1987-12-01), Lechner et al.

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