Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Plural discharge devices and/or rectifiers in the supply...
Patent
1991-07-08
1999-11-02
Shingleton, Michael B
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Plural discharge devices and/or rectifiers in the supply...
315247, 315DIG7, 363 37, H05B 3702
Patent
active
059777214
ABSTRACT:
Subject electronic ballast draws power from the power line with a power factor higher than 90%. The ballast consists of a power-factor-correcting rectifier circuit and an inverter circuit that provides a high-frequency squarewave voltage across a series-resonant L-C circuit to which a fluorescent lamp is connected. The rectifier circuit consists of a full-bridge rectifier connected with its AC input terminals to the power line and with its positive
egative output terminals across: i) the inverter circuit; ii) a series-combination of a first rectifier and a first electrolytic capacitor, the first rectifier being connected with its cathode to the positive output terminal and with its anode to a first junction, the first capacitor being connected between this first junction and the negative output terminal; and iii) a series-combination of a second rectifier and a second electrolytic capacitor, the second rectifier being connected with its anode to the negative output terminal and with its cathode to a second junction, the second capacitor being connected between this second junction and the positive output terminal. A separate rectifier means is connected between the two junctions in such manner as to permit current to flow freely from the second junction to the first junction.
REFERENCES:
patent: 2763813 (1956-09-01), McKinney et al.
patent: 2777973 (1957-01-01), Steele et al.
patent: 3913002 (1975-10-01), Steigerwald et al.
patent: 4017785 (1977-04-01), Perper
patent: 4053813 (1977-10-01), Kornrumpf et al.
patent: 4109307 (1978-08-01), Knoll
patent: 4127893 (1978-11-01), Goepel
patent: 4184128 (1980-01-01), Nilssen
patent: 4188660 (1980-02-01), Knoll
patent: 4358716 (1982-11-01), Cordes
patent: 4370600 (1983-01-01), Zansky
patent: 4388561 (1983-06-01), Koshimura et al.
patent: 4392086 (1983-07-01), Ide et al.
patent: 4426564 (1984-01-01), Steigerwald et al.
patent: 4441054 (1984-04-01), Bay
patent: 4808887 (1989-02-01), Fahnrich et al.
patent: 5012161 (1991-04-01), Borowiec et al.
Dale et al. "Conversion of Incandescent Lamp Sockets to Fluorescent in the Home Market" Mar. 1976 pp. 18-23 Lighting & Design Application.
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