Electronic ballast for fluorescent lights

Details Electronic ballast for fluorescent lights Electronic ballast for fluorescent lights

1991-02-04

1992-05-26

Mis, David

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315226, 315277, 315278, 315324, 315DIG5, H05B 4114

Patent

active

051171589

ABSTRACT:
The ballast is connected between the fluorescent lights and a source of power for the fluorescent lights. The source of power provides an input signal having a first waveform, usually a sine wave, at a first frequency. The ballast consists of a converter for coverting the first waveform to a second waveform at a second frequency different from the first frequency. A distribution arrangement distributes power to the fluorescent lights. The distribution system consists of a transformer, and capacitors are interposed between selected windings of the secondary of the transformer. In one embodiment, the sine wave is converted to a square wave by the converter and to a saw tooth waveform by the capacitors in the distribution arrangement so that the fluorescent lights are fed with the saw tooth waveform.

REFERENCES:
patent: 4353010 (1982-10-01), Knoll et al.
patent: 4415839 (1983-11-01), Lesea
patent: 4698554 (1987-10-01), Stupp et al.

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