Title :
Influence of frequency and current waveform on low-pressure sodium lamp operation
Author_Institution :
Dept. de Engenharia de Energia e Autom. Electr., Sao Paulo Univ., Brazil
Abstract :
Efficient light production in AC-supplied low-pressure sodium (LPS) lamps is strongly dependent on plasma conditions during the complete half-cycle. Significant luminous efficacy gains are obtained with sinusoidal currents of hundreds of kilohertz or with rectangular current forms at lower frequencies. Measurements of light emission from an 18-W LPS lamp at several operating conditions between 50 Hz-20 kHz, reported in this paper, can be useful to establish a compromise between supply frequency and current waveform shape for electronic ballast design
Keywords :
harmonic distortion; lamp accessories; metal vapour lamps; power conversion harmonics; sodium; 18 W; 50 Hz to 20 kHz; current waveform effects; efficient light production; electronic ballast design; frequency effects; low-pressure sodium lamp operation; operating conditions; sinusoidal currents; supply frequency; Current measurement; Current supplies; Electronic ballasts; Frequency measurement; High intensity discharge lamps; Industry Applications Society; Infrared heating; Plasma measurements; Production; Shape measurement;
Journal_Title :
Industry Applications, IEEE Transactions on
