Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1976-11-23
1978-04-11
Shoop, William M.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 68, 363 85, H02M 118
Patent
active
040842215
ABSTRACT:
A high-voltage thyristor converter having a plurality of series-connected thyristor units and a gate control system. Each of the series-connected thyristor units has a plurality of series-connected thyristors and a gate-drive power supply circuit (hereinafter referred to as a gate power supply) connected between both extreme ends of the series-connected thyristors for supplying gate-drive power to the thyristors. The gate control system detects whether or not an output voltage of the gate power supply of at least one of the series-connected thyristor units is at least equal to or higher than a predetermined value and transmits a gate signal simultaneously to all of the thyristors when the output voltage is higher than the predetermined value, so that a protective action for preventing breakdown of the thyristors can be performed upon an instantaneous power failure or the like trouble.
REFERENCES:
patent: 3593038 (1971-07-01), Hylten-Cavallius et al.
patent: 3842337 (1974-10-01), Ekstrom et al.
patent: 3878451 (1975-04-01), Ostlund et al.
patent: 3962624 (1976-06-01), Ostlund et al.
Hitachi , Ltd.
Shoop William M.
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