Discharge lamp lighting system using series connected starters

Details Discharge lamp lighting system using series connected starters Discharge lamp lighting system using series connected starters

1977-11-16

1979-03-20

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Plural load device systems

Sequential starting

315 97, 315101, 315103, 315189, 315244, 315324, H05B 4116

Patent

active

041456386

ABSTRACT:
The present discharge lamp system comprises two or more serially connected discharge lamps connected across a pair of power input supply terminals through a ballast circuit and two or more serially connected semiconductor starter circuits. The starters are connected in parallel with their respective discharge lamps and have inherent breakdown voltages, whereby the total value of the breakdown voltages for each starter is higher than the source voltage at the power supply terminals. The system further comprises voltage dividing circuit elements enabling the conduction of one of the starters before the conduction of the other starter or starters in response to the source voltage, whereby the starters operate sequentially. At least one of the starters employs a backswing booster including a series circuit of a nonlinear inductor and a switching semiconductor and a capacitor connected in parallel with the series circuit to provide a sufficient starting voltage for the associated discharge lamp.

REFERENCES:
patent: 3324349 (1967-06-01), Moerkens et al.
patent: 3582709 (1971-06-01), Furui et al.
patent: 3665243 (1972-05-01), Kaneda et al.

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