SCR strobe lamp control for preventing capacitor recharge during

Details SCR strobe lamp control for preventing capacitor recharge during SCR strobe lamp control for preventing capacitor recharge during

1974-12-26

1976-03-23

Kominski, John

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315200A, H05B 3700

Patent

active

039462714

ABSTRACT:
A strobe lamp power supply control circuit for use with a high intensity strobe lamp operating at a high flashing rate in parallel with a capacitor storage arrangement is disclosed. Strobe lamp after-glow is quickly eliminated after each flash. This is accomplished by providing an SCR which disconnects the power source from the capacitor storage arrangement and the strobe lamp for a sufficient time to allow the after-glow to dissipate. A zero crossing detector is provided to protect the SCR from surge currents by permitting the SCR to be gated on only when there is a zero potential across the terminals of the SCR. Additionally, the capacitor storage arrangement may be used to supply either of two strobe lamps when a voltage limiting circuit is activated to regulate the amount of energy stored.

REFERENCES:
patent: 3339108 (1967-08-01), Holtje

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