Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1996-12-30
1999-03-30
Kinkead, Arnold
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315278, 336178, 336165, 323247, 323250, H05B 3702
Patent
active
058893733
ABSTRACT:
A fluorescent lamp ballast utilizes a single a transformer for providing both tank inductance and current mode feedback to the ballast driver circuitry. The transformer has an "EE" core with inductor windings on the center legs and gate windings on one of the outer legs. The center leg is gapped to avoid magnetic core saturation and to adjust inductance to a desired value. Coupling can be adjusted further by gapping one or the other of the outer legs.
REFERENCES:
patent: 3396307 (1968-08-01), Campell
patent: 3546571 (1970-12-01), Fletcher et al.
patent: 3703677 (1972-11-01), Farrow
patent: 4613841 (1986-09-01), Roberts
patent: 5349270 (1994-09-01), Roll et al.
"Circuits and Applications for Portable and Emergency Lighting Using Fluorescent Lamps," JH Campbell, QD Dobras, Transaction IES, Jan. 1967, pp. 43-51.
Fisher Rayette Ann
Kachmarik David Joseph
Schultz William Newell
Thomas Robert James
Breedlove Jill M.
General Electric Company
Kinkead Arnold
Stoner Douglas E.
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