High-voltage crowbar circuit with cascade-triggered series ignitrons

Title: High-voltage crowbar circuit with cascade-triggered series ignitrons

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Abstract

A series string of ignitrons for switching a large current at high voltage to ground. Switching is initiated by means of a negative trigger pulse applied to the cathode of the lowest voltage level ignitron next to ground to draw ground current through diodes in the ignitor circuit. The trigger pulse is applied thereby to the next higher ignitron cathode and sequentially to the remainder of the ignitrons in the string through diodes in respective ignitor circuits. Full line voltage is held off of nonconducting diodes and ignitrons by means of varistors.

Inventors:

Baker, William R. ^[1]

Orinda, CA

Issue Date:: 1980-11-04

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

OSTI Identifier:: 863712

Patent Number(s):: 4,232,351

Assignee:: United States of America as represented by United States (Washington, DC) LLNL

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; high-voltage; crowbar; circuit; cascade-triggered; series; ignitrons; string; switching; current; voltage; ground; initiated; means; negative; trigger; pulse; applied; cathode; lowest; level; ignitron; draw; diodes; ignitor; sequentially; remainder; respective; circuits; line; held; nonconducting; varistors; trigger pulse; series string; line voltage; voltage level; TRIGGER CIRCUITS; ELECTRIC GROUNDS; SEMICONDUCTOR RESISTORS; SWITCHES; ELECTRICAL EQUIPMENT; ELECTRON TUBES; ELECTRONIC CIRCUITS; EQUIPMENT; GAS DISCHARGE TUBES; PULSE CIRCUITS; RECTIFIER TUBES; RESISTORS; SEMICONDUCTOR DEVICES; /361/315/

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                    Baker, William R. High-voltage crowbar circuit with cascade-triggered series ignitrons.  United States: N. p., 1980. 
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                    Baker, William R. High-voltage crowbar circuit with cascade-triggered series ignitrons.  United States.

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                    Baker, William R. Tue .  
        "High-voltage crowbar circuit with cascade-triggered series ignitrons".  United States.  https://www.osti.gov/servlets/purl/863712.

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@article{osti_863712,

  title        = {High-voltage crowbar circuit with cascade-triggered series ignitrons},

  author       = {Baker, William R.},

  abstractNote = {A series string of ignitrons for switching a large current at high voltage to ground. Switching is initiated by means of a negative trigger pulse applied to the cathode of the lowest voltage level ignitron next to ground to draw ground current through diodes in the ignitor circuit. The trigger pulse is applied thereby to the next higher ignitron cathode and sequentially to the remainder of the ignitrons in the string through diodes in respective ignitor circuits. Full line voltage is held off of nonconducting diodes and ignitrons by means of varistors.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1980},

  month        = {11}

}

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High-voltage crowbar circuit with cascade-triggered series ignitrons

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