Protective circuit for thyristors

Details Protective circuit for thyristors Protective circuit for thyristors

H - Electricity

02

H

323/7

H02H 7/12 (2006.01) H03K 17/082 (2006.01)

Patent

CA 1068782

Abstract of the Disclosure The invention relates to a protective circuit to prevent the spontaneous ignition of thyristors in a series circuit containing a large number of thyristors. First switching signals are formed when the voltage at the relevant thyristor becomes negative. These first switching signals are fed through a clearing unit to a common evaluating device and to a counting device, the latter producing a clearing signal for the clearing unit only when a pre-determined number of first switching signals has arrived. The evaluating device follows a number of second transmitting devices, for transmitting a common time signal, corresponding to the number of thyristors.

263076

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