Protection circuit for a thyristor converter

Details Protection circuit for a thyristor converter Protection circuit for a thyristor converter

1988-04-28

1989-01-03

Paschall, M. H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 18, 361111, 363 54, 363 57, H02H 710, H02H 320

Patent

active

047961465

ABSTRACT:
A protection circuit is provided which digitally detects the presence/absence of individual forward voltages across all thyristors at a level low enough compared to the allowable voltage, judges a partial turn-off in accordance with the number of detection signals indicative of the presence/absence, and determines simultaneous firing protection of all the thyristors in accordance with the result of the judgement.

REFERENCES:
patent: 3842337 (1974-10-01), Ekstrom et al.
patent: 3878448 (1975-04-01), Jackson et al.
patent: 3962624 (1976-06-01), Ostlund et al.
patent: 4065802 (1977-12-01), Mizukawa et al.
patent: 4084207 (1978-04-01), Piccone et al.
patent: 4377835 (1983-03-01), Asplund et al.
patent: 4414599 (1983-11-01), Kobayashi
patent: 4536816 (1985-08-01), Matsumura et al.

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