H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/14, 321/91
H02M 7/155 (2006.01) H02H 7/127 (2006.01) H02M 1/096 (2006.01)
Patent
CA 1050107
HIGH-VOLTAGE THYRISTOR CONVERTER Abstract of the Disclosure 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 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.
266628
Hitachi Ltd.
Na
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