Jeferson S. da Silveira

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This paper presents the integration of power stages in order to supply HPS lamps with a low frequency square waveform. This waveform is chosen to avoid the acoustic resonance phenomenon occurrence. Conventionally, the electronic ballast to supply the lamp in this way should have three power stages: power factor correction (PFC), power control (PC) and(More)
This paper presents a warm-up and steady-state control method for a 70 W high-pressure sodium (HPS) lamp fed by electronic ballast, in order to replace the still commonly used electromagnetic ballasts and take better advantage of lamp's useful life and luminous efficacy. Along this work, a reliable electronic ballast topology has been chosen, attending the(More)
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