Nova topologia de reator eletrônico utilizado para acionar uma ou mais lâmpadas HPS com forma de onda de tensão sintetizada

Abstract

The objective of this work is to present a new electronic ballast topology used to supply one or more high pressure sodium lamps. It is ideal for poles luminaries with one or more HPS lamps used in private and public lighting. The proposed ballast supplies the lamps using synthesized waveform with fundamental frequency below 1 kHz in order to avoid acoustic resonance and minimize luminous flux oscillation. Studies on HPS lamps have been done, emphasizing the acoustic resonance problem, in addition to the electronic ballast, operating in high and low frequencies, and classification of reactors. A study on injection of synthesized waveform with the third harmonic, and the results obtained with the proposed electronic ballast are also presented.