Device for limiting inrush current

Details Device for limiting inrush current Device for limiting inrush current

1988-05-23

1989-01-24

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Phase controlled switching using electronic tube or a three...

323908, 315DIG7, 363 53, H02H 902

Patent

active

048003298

ABSTRACT:
Disclosed is a device for limiting the inrush current in a lamp, comprising a resistor means to limit the inrush current that may arise in a lamp, the resistor means being connected in series with the lamp and power source; a controlled rectifier (main controlled rectifier) having the main currrent path connected in parallel with the resistor means; another controlled rectifier (secondary controlled rectifier) having the main current path connected with the gate of the main controlled rectifier; and a delay circuit (e.g. RC-time constant circuit) having the output connected with the gate of the secondary controlled rectifier in such manner that the power source energizes the lamp through the resistor means over the time as predetermined by the time constant of the delay circuit.

REFERENCES:
patent: 3793581 (1974-02-01), Ortgies, Jr.
patent: 4207516 (1980-06-01), Babcock
patent: 4555741 (1985-11-01), Masaki
patent: 4654579 (1987-03-01), Masaki
M. Glasberg, "Silicon Controlled Rectifiers", Electromechanical Design, vol. 6, No. 3, pp. 13-16, 19, 22-26, Mar. 1962.
J. B. Davis et al., "Low-Voltage AC Hg Arc Lamp Power Supply", IBM Tech. Discl. Bulletin, vol. 18, No. 2 Jul. 1975, pp. 596-597.

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