Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device
Patent
1998-01-29
2000-03-07
Shingleton, Michael B
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
With power factor control device
315DIG7, 315307, 315244, 315324, H05B 3702
Patent
active
060344881
ABSTRACT:
A fluorescent lighting system connected to an AC voltage source providing a first AC voltage is disclosed. A converter circuit connected to the AC voltage source converts the first AC voltage to a DC voltage. An oscillator circuit receives the DC voltage and produces a second AC voltage. The oscillator circuit includes a series resonant circuit and a removable installed fluorescent lamp. The series resonant circuit includes a resonant capacitor and a resonant conductor in series. The lamp has first and second elements and is connected in parallel with the resonant capacitor of the series resonant circuit such that lighting current runs between the first and second elements. The second element is connected in series with the resonant capacitor and the resonant inductor and acts as a switching element. When the lamp is removed from the system, the absence of the switching element creates an open circuit between the resonant capacitor and the resonant inductor such that the oscillator circuit does not operate.
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"Electronic Ballasts Using the Cost-Saving IR215X Drivers", Control Integrated Circuit Designers' Manual, p. C-59-C-68.
Deschamp Joseph
Lindauer Louis F.
Lighting Control, Inc.
Shingleton Michael B
LandOfFree
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