Constant energy transfer rate strobe source

Details Constant energy transfer rate strobe source Constant energy transfer rate strobe source

1981-10-22

1983-12-20

Dixon, Harold

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315287, 315308, H05B 3700

Patent

active

044220162

ABSTRACT:
A strobe light power source transfers a constant amount of energy to a capacitor bank for each flash of a strobe lamp by maintaining a constant energy transfer rate between a power source and the capacitor bank and allowing the capacitor bank to charge for a set period of time. The effective value of the input current to a charging circuit connected between the power source and the capacitor bank can be maintained at a constant value to provide an approximately constant energy transfer rate. Such constant current control is most effective for a source having a relatively constant output voltage. In sources where the output voltage varies over time, both the input current and voltage to the charging circuit are monitored, combined and integrated to generate a duty cycle output signal which controls the charging circuit. A timer circuit is provided to set time periods during which the capacitor bank is charged at the constant rate to provide constant energy for each flash of the strobe light. The timer circuit can trigger or activate the strobe lamp and also prevent recharging of the capacitor bank for afterglow protection of the strobe lamp.

REFERENCES:
patent: 3644818 (1972-02-01), Paget
patent: 4005337 (1977-01-01), Rabe
patent: 4039897 (1977-08-01), Dragoset
patent: 4277728 (1981-07-01), Stevens

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