Electricity: power supply or regulation systems – Output level responsive – Phase controlled switching using electronic tube or a three...
Patent
1985-08-01
1987-07-14
Hix, L. T.
Electricity: power supply or regulation systems
Output level responsive
Phase controlled switching using electronic tube or a three...
361235, 55139, B03C 301
Patent
active
046805338
ABSTRACT:
A method and apparatus for protecting switching elements, and in particular, thyristor switching elements, which are used to supply pulses to a capacitive load, from damage resulting from sparkover occurring in that load are described. The load voltage pulse is characterized by a period of rising voltage followed by a period of falling voltage, these two periods being separated by a transition period of maximum vulnerability of the switching element to damage from sparkover. Specifically, during this period of maximum vulnerability of the switching elments to damage, a gate trigger pulse is applied to the elements to cause them to resume a conductive state, independent of the occurrence of an abnormal sparkover condition.
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Article-"Energy Conserving Pulse Energization of Precipitators", P. Lausen, H. Henriksen, H. Hoegh Peterson-1979 IEEE-1AS79:6B, pp. 163-171.
Carlson Gerald J.
Dietz Peter W.
Itani Abdallah M.
Davis Jr. James C.
General Electric Company
Hix L. T,.
Lacomis Bernard J.
Rutledge D.
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