WHITE-NOISE MODULATION OF HIGH-FREQUENCY HIGH-INTENSITY DISCHARGE LAMP BALLASTS

Authors
LASKAI L ENJETI PN PITEL IJ
Citation
L. Laskai et al., WHITE-NOISE MODULATION OF HIGH-FREQUENCY HIGH-INTENSITY DISCHARGE LAMP BALLASTS, IEEE transactions on industry applications, 34(3), 1998, pp. 597-605
Citations number
25
Categorie Soggetti
Engineering,"Engineering, Eletrical & Electronic
Journal title
IEEE transactions on industry applications → ACNP
ISSN journal
00939994
Volume
34
Issue
3
Year of publication
1998
Pages
597 - 605
Database
ISI
SICI code
0093-9994(1998)34:3<597:WMOHHD>2.0.ZU;2-5
Abstract
In this paper, a new method is proposed to avoid acoustic-resonance-re lated instabilities in metal halide lamps when operated with a high-fr equency electronic ballast. Angle modulation of the inverter switching pattern has been used as a vehicle to randomize lamp driving frequenc y and to limit lamp power spectrum below the instability threshold. Th e optimal modulating pattern is obtained by studying the angle-modulat ed spectra by periodic and random signals. Analysis is supported by si mulations and verified experimentally with the ballasting of 250-W lam ps.