Electricity: electrical systems and devices – Igniting systems – For electric spark ignition
Patent
1994-05-12
1996-06-25
Fleming, Fritz M.
Electricity: electrical systems and devices
Igniting systems
For electric spark ignition
123596, F02P 309
Patent
active
055306179
ABSTRACT:
An oscillatory discharge exciter includes an input connectable to a power supply; an output connectable to an igniter; at least two energy storage elements for producing an oscillatory discharge of energy during an exciter discharge period; a unidirectional gated switch and a rectifier coupled in reverse parallel with each other such that the switch and rectifier control, during respective alternating half cycles, oscillatory discharge energy at the exciter output; and a circuit for gating the switch in response to voltage transitions across the switch. The gating circuit can also be used as a snubber circuit to add gate drive to slow devices, as well as to trigger a series of switching devices with the application of only a single external trigger signal to one of the devices. In an alternative embodiment, the gating circuit is replaced with a circuit for maintaining holding current through the switch to prevent the switch from recovering to a blocking condition.
REFERENCES:
patent: 4167767 (1979-09-01), Courier de Mere
patent: 4418375 (1983-11-01), Ober
patent: 4589398 (1986-05-01), Pate et al.
patent: 4886036 (1989-12-01), Johansson et al.
SCR Applications Handbook, Sep. 1974, pp. 140-145, Edited by Dr. Richard J. Hoft.
Society of Automotive Engineers, Inc., Aerospace Information Report, AIR 784A, Interrelation Of Engine Design And Burner Configuration With Selection And Performance Of Electrical Ignition Systems For Gas Turbine Engines, issued Jul. 15, 1963, revised Jun. 15, 1975.
Bonavia Howard V.
Geislinger Dale F.
Fleming Fritz M.
Lewis Leonard L.
Simmonds Precision Engine Systems Inc.
Zitelli William E.
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