Innovative Solutions for Acoustic Resonance Characterization in Metal Halide Lamps
En vue de l'obtention du DOCTORAT DE L'UNIVERSITÉ DE TOULOUSE Délivré par : Institut National Polytechnique de Toulouse (INP Toulouse) Discipline ou spécialité : Génie Électrique Présentée et soutenue par : Mme FANG LEI le mercredi 24 janvier 2018 Titre : Innovative Solutions for Acoustic Resonance Characterization in Metal Halide Lamps Ecole doctorale : Génie Electrique, Electronique, Télécommunications (GEET) Unité de recherche : Laboratoire Plasma et Conversion d'Energie (LAPLACE) Directeur(s) de Thèse : M. PASCAL MAUSSION M. GEORGES ZISSIS Rapporteurs : M. BABAK NAHID-MOBARAKEH, UNIVERSITÉ LORRAINE M. MOUNSIF ECH CHERIF EL KETTANI, UNIVERSITE DU HAVRE Membre(s) du jury : Mme BETTY SEMAIL, UNIVERSITE LILLE 1, Président M. GEORGES ZISSIS, UNIVERSITE TOULOUSE 3, Membre M. PASCAL DUPUIS, UNIVERSITE TOULOUSE 3, Membre M. PASCAL MAUSSION, INP TOULOUSE, Membre Abstract Metal halide lamp is one kind of the most compact high-performance light sources. Because of their good color rendering index and high luminous efficacy, these lamps are often preferred in locations where color and efficacy are important, such as supermarkets, gymnasiums, ice rinks and sporting arenas. Unfortunately, acoustic resonance phenomenon occurs in metal halide lamps and causes light flicker, lamp arc bending and rotation, lamp extinction and in the worst case, arc tube explosion, when the lamps are operated in high-frequency bands. This thesis takes place in the context of developing electronic ballasts with robust acoustic resonance detection and avoidance mechanisms. To this end, several envelope detection methods such as the multiplier circuit, rectifier circuit, and lock-in amplifier, are proposed to characterize fluctuations of acoustic resonance. Furthermore, statistical criteria based on the standard deviation of these fluctuations are proposed to assess acoustic resonance occurrence and classify its severity.
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