- Volume 50 Issue 12
HID(high intensity discharge)lamps are high pressure mercury lamp, high pressure sodium lamp and metalhalide lamp. metalhalide lamp among these lamps has considered to be one of the most effective artificial light sources and this lamp has good efficiency, good color rendition and good focusing capability, But the shortcorning of metalhalide lamp is known as acoustic resonance phenomena in the discharge tube when lighted by electronic ballast and then acoustic resonance cause various problems such as the arc instability, light output fluctuations. In this paper, to reduce the acoustic resonence phenomena, the electronic ballast was designed by three methods for high frequency operation wish frequency-modulated sinusodial waves in acoustic resonance frequency band. These frequency-modulated methods are resonance frequency and resonance frequency, resonance frequency and non-resonance frequency non-resonance frequency and non-resonance frequency Experiment results could't show the Presence of acoustic resonance visually and it proved that the resonance-generating conditions can be avoided by continuously changing the two operating frequencies in acoustic resonance band (20.59kHz∼94.2kHz).
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- J. WDenneman. 'Acoustic Resonances in High Frequency Operated Low Wattage Metal Halide Lamps.' Philips Journal of Research. Vol38. N04/5, 1983, pp. 1074-1084
- R Schaferand H. P. stormberg 'Investigations on the fundamental longitudinal acoustic resonance of high pressure discharge lamps.' J. Appl. Phys. 53(5), May 1982, pp3476-3438 https://doi.org/10.1063/1.331167
- Jaros Melts presents 'Electronic Ballast Design for HID lamps ', 1998, pp.1-6
- S.Wada, A.Okada, S.Morii, 'Study of HID Lamps with Reduced Acoustic', winter 1987 JOURNAL of the illuminating Engineering Society. pp. 162 - 175