Estudo, projeto e desenvolvimento de um reator eletrônico, pela técnicade injeção de correntes harmônicas, para lâmpadas de vapor de sódio dealta pressão de 70 W

Abstract

The present work deals with the study of the harmonic injection technique, with the objective to avoid the acoustics resonance, in high-pressure sodium lamps (HPS) of 70W, when fed by electronic ballast. A prototype of the three level full bridge PWM electronic ballast was developed which allows the of harmonics in the voltage supplied to the 70W HPS lamp. A study on the characteristics of lamp 70 W HPS is carried through, obtaining models for low and high frequency. The design procedure and result of the inverter used in ballast is then presented. The dimensioning of the resonant circuit, for the ignition of lamp, based on the technique, voltage beating is made. The generation of the injection signals of will be made by DSP. Results are presented of the technique of the chosen structures. Forms of continuity of the research in this area will be presented.