Turbine engine igniter exciter circuit

Details Turbine engine igniter exciter circuit Turbine engine igniter exciter circuit

1990-02-15

1991-07-16

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 86, 361257, 123604, H02M 3335, F23Q 300

Patent

active

050329693

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.

REFERENCES:
patent: 4613797 (1986-02-01), Eggers et al.
patent: 4833369 (1989-05-01), White
patent: 4839772 (1989-06-01), Choi et al.
patent: 4922396 (1990-05-01), Niggemeyer

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