Turbine engine igniter exciter circuit
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United States of America Patent
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Jul 16, 1991
Grant Date -
N/A
app pub date -
Feb 15, 1990
filing date -
Feb 15, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved turbine engine igniter exciter circuit. An oscillator circuit drives the primary winding of a transformer for charging a capacitor to a predetermined voltage greater than the voltage required to sustain a spark discharge at an igniter but less than the voltage required to establish a spark discharge at the igniter. A timing circuit periodically triggers an SCR to discharge a portion of the energy stored in the capacitor through the primary winding of a step up transformer to create a short duration high voltage ignition pulse for establishing the spark discharge. The remaining lower voltage energy in the capacitor sustains the spark discharge for a predetermined time.
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