Capacitive discharge ignition exciter using SCR discharge switch

Details Capacitive discharge ignition exciter using SCR discharge switch Capacitive discharge ignition exciter using SCR discharge switch

1989-02-17

1991-10-01

Pellinen, A. D.

Electricity: electrical systems and devices

Igniting systems

For electric spark ignition

361254, 361256, 123143B, F23Q 300

Patent

active

050539132

ABSTRACT:
An exciter circuit for a gas turbine engine ignition system. A high voltage supply continuously charges a storage capacitor. A plurality of silicon controlled rectifiers (SCRs) are connected in series between the storage capacitor and a high voltage conditioning circuit. A multi-section protective network is connected in parallel with the series connected SCRs. Individual network sections are connected across separate ones of the SCRs. The SCRs are normally non-conducting and are periodically triggered to discharge the storage capacitor into the conditioning circuit. An igniter plug is connected to the output of the conditioning circuit. The protective network divides the voltage of the storage capacitor equally across the SCRs when the latter are non-conductive thereby reducing the voltage stress to which each of the SCRs is subjected.

REFERENCES:
patent: 3531738 (1970-09-01), Thakore
patent: 3605714 (1971-09-01), Hardin et al.
patent: 3619638 (1971-11-01), Phinney
patent: 4398128 (1983-08-01), Wollank
patent: 4432646 (1980-11-01), Asai
patent: 4457285 (1984-07-01), Hamai et al.
patent: 4705013 (1987-11-01), Minks
patent: 4839772 (1989-06-01), Choi et al.
patent: 4983886 (1991-01-01), Balland
Silicon Controlled Rectifier Designer's Handbook by Westinghouse Electric Corporation, (Sep. 1970), Leslie R. Rice, Editor, 2nd Edition, W.E. Semiconductor Division, Youngwood, Pa., pp. (9-1)-(9-5).

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