Discharge lamp ballast circuit

Details Discharge lamp ballast circuit Discharge lamp ballast circuit

1975-08-28

1977-08-30

La Roche, Eugene

Electric lamp and discharge devices: systems

Plural power supplies

Discharge device and/or rectifier in one of the supply circuits

315174, 315205, 315276, 315283, 315DIG5, 363 68, 363126, H05B 4116, H02M 506, H02M 520

Patent

active

040457087

ABSTRACT:
Electrical ballast circuit for operating gaseous discharge lamps with direct current. An inductive reactor coil connected to an alternating current source is connected to a discharge lamp via a full-wave rectifier, and an auxiliary induction coil inductively coupled to the reactor coil is connected to the discharge lamp via another full-wave rectifier, resulting in the currents from the respective rectifiers to the lamp being out of phase with one another, thereby raising the average current through the lamp and the voltage across the lamp to prevent lamp de-ionization and reduce lamp re-ignition voltage. Series connected capacitors may be incorporated in the circuit to increase the starting voltage on the lamp if necessary.

REFERENCES:
patent: 2777973 (1957-01-01), Steele et al.
patent: 3034015 (1962-05-01), Schultz
patent: 3253184 (1966-05-01), Willecke et al.
patent: 3427501 (1969-02-01), Laub et al.
patent: 3735238 (1973-05-01), Miller
patent: 3758815 (1973-09-01), Paget
patent: 3805112 (1974-04-01), Tsumura

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