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Acoustic Resonance Characterization of Low-Wattage Metal-Halide Lamps Under Low-Frequency Square-Waveform Operation

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5 Author(s)
Costa, M.A.D. ; Electr. Eng. Dept., Univ. de Oviedo, Gijon ; Alonso, J.M. ; Garcia, J. ; Cardesin, J.
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In this paper, a study about acoustic resonance (AR) in low-wattage metal halide lamps is presented. The lamps are supplied with a typical low frequency square waveform on which a high frequency sinusoidal ripple is superposed. The goal is to emulate the same waveforms generated by a low frequency electronic ballast. In this way, the ARs that appear in the lamp can be characterized against ripple amplitude and frequency. Different lamp's manufacturers and burning hours are used. The obtained results are intended to be employed in further reliable designs of low-frequency square-waveform electronic ballasts. An example of application of the accumulated AR signatures in this type of electronic ballasts is carried out, and a standard proposal is presented

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Power Electronics, IEEE Transactions on  (Volume:22 ,  Issue: 3 )