Electronic capacitive ballast for fluorescent and other discharg

Details Electronic capacitive ballast for fluorescent and other discharg Electronic capacitive ballast for fluorescent and other discharg

1990-01-12

1991-09-17

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Surge generator or inductance in the supply circuit

315244, 315DIG5, H05B 4114

Patent

active

050497898

ABSTRACT:
An electronic capacitive ballast for fluorescent or other discharge lamps is provided which operates at a leading power factor, energy is conserved, lighting is instantaneous and the fluorescent lamps light up even if the filaments are broken. The fluorescent or other discharge lamps comprise of at least once capacitor having normal values upto 20 .mu.F. The capacitor is connected to a power source and at least one inductance coil having values upto 5 H. The inductance coil is connected to a starting device for unidirectional passage of current during starting of the fluorescent lamp. The starting device comprises of Triac, silicon controlled rectifier or the like diode and at least one preset resistor. Two sets of output terminals of the starting device are connected to the fluorescent lamp or other discharge lamps. The starting device is connected to the power source.

REFERENCES:
patent: 3586817 (1971-06-01), Manz
patent: 3679936 (1972-07-01), Morekens
patent: 3997814 (1976-12-01), Toho
patent: 4342848 (1982-08-01), Samuels
patent: 4406976 (1983-09-01), Wisbey
patent: 4443739 (1984-04-01), Woldring
patent: 4588925 (1986-05-01), Fahnrich
patent: 4885507 (1989-12-01), Ham
patent: 4929871 (1990-05-01), Gerfast

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