High frequency electronic ballast for lighting

Details High frequency electronic ballast for lighting High frequency electronic ballast for lighting

1996-05-21

1999-05-04

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315224, 315209R, 315DIG7, G05F 100

Patent

active

059007010

ABSTRACT:
A lighting inverter provides voltage and current to a gas discharge lamp in general and a metal halide lamp in particular with a novel power factor controller. The power factor controller. step down converter having the device stresses of a buck converter, continuous current at its input like a CUK' converter, a high power factor, low input current distortion and high efficiency. The inverter consists of two cyclically rotated CUK' switching cells connected in a half bridge configuration and operated alternately. The inverter is further optimized by using integrated magnetics and a shared energy transfer capacitor. The AC voltage output from the inverter is regulated by varying its frequency. A ballast filter is coupled to the regulated output of the inverter. The ballast filter is formed by a series circuit of a ballast capacitor and a ballast inductor. The lamp is preferably connected across the inductor to minimize the acoustic arc resonance. The values of the capacitor and the inductor are chosen so as to satisfy the firing requirements of the HID lamps. A plurality of lamps are connected by connecting the multiple lamps with the ballast filters to the secondary of the inverter transformer. Almost unity power factor is maintained at the line input as well as the lamp output.

REFERENCES:
patent: 3969652 (1976-07-01), Herzog
patent: 4042856 (1977-08-01), Steigerwald
patent: 4220896 (1980-09-01), Paice
patent: 4701671 (1987-10-01), Stupp et al.
patent: 4952849 (1990-08-01), Fellows et al.
patent: 5003231 (1991-03-01), Perper
patent: 5204587 (1993-04-01), Mortimer et al.
patent: 5359274 (1994-10-01), Bandel
patent: 5416387 (1995-05-01), Cuk et al.
patent: 5491386 (1996-02-01), Eriguchi et al.

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