Characterization of Acoustic Resonance in a High-Pressure Sodium Lamp

Labo Chhun (1) , Pascal Maussion (2) , Sounil Bhosle (1, 3) , Georges Zissis (4)

1 LAPLACE - LAboratoire PLasma et Conversion d'Energie
2 LAPLACE-CODIASE - COmmande et DIAgnostic des Systèmes Electriques
3 UT3 - Université Toulouse III - Paul Sabatier
4 LAPLACE-LM - Lumière et Matière

With the last decades, the high pressure sodium (HPS) lamp has been supplied in high frequency in order to increase the efficacy of the lamp/ballast system. However, at some given frequencies, standing acoustic waves, namely acoustic resonance (AR), might develop in the burner and cause lamp luminous fluctuation, extinction and destruction in the most serious case. As we seek for a control method to detect and avoid the lamp AR some main characteristics of the acoustic resonances in a 150W HPS lamp are presented in this paper,. The first one is the characteristic of the lamp AR threshold power, the second one is the differences between forward and backward frequency scanning effects during lamp open loop operation. Thirdly, lamp AR behaviour in closed loop operation with an LCC half bridge inverter will be presented and leads to a new point of view and a change in the choice of the AR detection method. These characteristics allow us to further understand the AR and to better control the lamp.

Mots clés: AR threshold power; AR detection; Acoustic resonance; forward and backward frequency sweeping

Domaines: Optique / photonique; Plasmas

Labo Chhun, Pascal Maussion, Sounil Bhosle, Georges Zissis. Characterization of Acoustic Resonance in a High-Pressure Sodium Lamp. IEEE Transactions on Industry Applications, 2011, 47 (2), pp.1071-1076. ⟨10.1109/TIA.2010.2102993⟩. ⟨hal-00691686⟩