B - Operations – Transporting – 03 – C
Patent
B - Operations, Transporting
03
C
323/10, 317/2.5
B03C 3/66 (2006.01) B03C 3/68 (2006.01) G05F 1/44 (2006.01) H02H 7/00 (2006.01)
Patent
CA 1196954
ABSTRACT OF THE DISCLOSURE A method and apparatus for protecting switching elements, and, in particular, thyristor switching elements, which are used in a pulse generator to supply pulsed electrical voltage to a capacitive load, from damage resulting from a spark-over occurring in that load are described. Specifically, whenever the occurrence of a spark-over is detected, during, for example, the interval of time when a voltage pulse applied across the load is decaying, a trigger pulse is applied by a firing circuit to the thyristors to cause them to assume a substantially conductive state.
403268
Henriksen Henrik
Nielsen Torben G.
Taarning Claus E.
Osler Hoskin & Harcourt Llp
Smidth (f.l.) & Co. Of Canada Limited
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