Multi-function filament-heater power supply for an electronic ba

Details Multi-function filament-heater power supply for an electronic ba Multi-function filament-heater power supply for an electronic ba

1995-11-02

1997-12-30

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315308, 315209R, 315 94, 315DIG4, G05F 100

Patent

active

057034419

ABSTRACT:
A filament-heater power supply includes a combination forward and flyback power converter for supplying electronically variable, isolated voltages to dimmable discharge lamp filaments while supplying a fixed dc output voltage to a ballast control circuit. Hence, only a single ballast power supply is needed. The control circuit controls the level of filament voltage to operate the lamp filaments at an optimum temperature, even during dimming operation, thereby substantially extending lamp life. The filament-heater power supply provides a high degree of isolation among filament voltages while regulating and tracking the voltage across each filament. The filament-heater power supply can preheat the filaments to aid lamp starting, thereby extending the useful life of the lamp, and is also structured to sense when a lamp is not present in a fixture so that high voltage starting pulses are not applied to the terminals of an empty fixture.

REFERENCES:
patent: 4523131 (1985-06-01), Zansky
patent: 4682080 (1987-07-01), Ogawa et al.
patent: 4866350 (1989-09-01), Counts
patent: 4870327 (1989-09-01), Jorgensen
patent: 4873471 (1989-10-01), Dean et al.
patent: 5432406 (1995-07-01), Brooks

Affiliated with

Also associated with

Rating

Multi-function filament-heater power supply for an electronic ba does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-function filament-heater power supply for an electronic ba, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-function filament-heater power supply for an electronic ba will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-205565