Acoustic resonances in HID lamps: model and measurement

Hirsch, J. Seth; Baumann, Bernd; Wolff, Marcus; Bhosle, Sounil; Valdivia-Barrientos, R.

doi:10.1088/0022-3727/43/23/234002

Cited by 10 publications

(12 citation statements)

References 19 publications

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“…In frequency space the resonance exhibit a Lorentzian profile [25,26] with side bands which in principle allow a coupling of the resonance to distant excitation frequencies. This means that a lamp should be operated in a region far away from its acoustic resonances.…”

Section: Resultsmentioning

confidence: 99%

Investigation of acoustic resonances in high-power lamps

Kettlitz

Rarbach²,

Zalach

2011

J. Phys. D: Appl. Phys.

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Abstract. High power, medium pressure, mercury containing lamps are used as UV sources for many industrial applications. Lamps investigated in this paper are driven with an electronic ballast with a non-sinusoidal current waveform at a fixed frequency of 20 kHz and a maximum power output of 35 kW. Instabilities can occur if the input power is reduced below 50%. The reason is identified as acoustic resonances in the lamp. Comparison of calculated and measured resonance frequencies shows a good agreement and explains the observed lamp behavior. This led to a development of a new ballast prototype which is able to avoid instabilities by changing the driving frequency in dependence on the applied power.

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Section: Resultsmentioning

confidence: 99%

Investigation of acoustic resonances in high-power lamps

Kettlitz

Rarbach²,

Zalach

2011

J. Phys. D: Appl. Phys.

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“…On the one hand, the quality factor k l Q related to the conduction loss on the boundary layer with a depth k l d , and according to [4,17,18] can be defined as in (11).…”

Section: E Post-treatmentmentioning

confidence: 99%

“…On the other hands, the quality factor Finally, the AR amplitude in function of discharge injected frequency at a given AR frequency or AR mode is described by the following equation [4,17,18]: Fig.1 and Fig.2. The frequency range in our study is defined as 20 kHz, nevertheless, it is possible to simulate the model at higher frequencies.…”

Section: E Post-treatmentmentioning

confidence: 99%

Acoustic resonance characterization and numerical model including acoustic streaming in an HPS lamp

Toumi

Chhun

Bhosle

et al. 2011

2011 IEEE Industry Applications Society Annual Meeting

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Abstract --This paper presents a numerical model of High Pressure Sodium (HPS) lamps including the acoustic streaming. The model is implemented in COMSOL and based on the finite elements method using a 2D axi-symmetric geometry. Moreover, a revision concerning AR experimental characterizations of HPS lamps will also be provided. The results presented in this paper will contribute to the understanding of AR phenomena and help in the electronic ballast design methods for AR avoidance.

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“…However, this simulation on an acoustic time scale is computationally intensive. In 2009 a 2D axisymmetric model, which includes plasma, an arc tube wall, and electrodes, was used to compute the acoustic frequency spectrum on the basis of a stationary plasma simulation [6,7]. In a second step the acoustic pressure as a function of frequency was calculated considering loss factors.…”

Section: Introductionmentioning

confidence: 99%

Arc Shape of High-Intensity Discharge Lamps: Simulation and Experiments

2014

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A stationary compressible three-dimensional (3D) model of photothermal processes inside an arc tube of a high-intensity discharge lamp is developed on the basis of the finite element method. It takes plasma, electrodes, and the tube wall into account and enables simulation of acoustic phenomena. The temperature profile of the discharge arc is used as a marker for the emission of visible light. Complementary, experimental investigations are conducted at different modulation frequencies. A photodetector array is used to record 2D information about the light intensity distribution. The shape and length of the discharge arc are determined and compared to numerical results.

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Acoustic resonances in HID lamps: model and measurement

Abstract: A finite element model including plasma simulation is used to calculate the amplitude of acoustic resonances in HID lamps in a 2D axisymmetric geometry. Simulation results are presented for different operation parameters and are compared with experimental data.

Cited by 10 publications

References 19 publications

Investigation of acoustic resonances in high-power lamps

Investigation of acoustic resonances in high-power lamps

Acoustic resonance characterization and numerical model including acoustic streaming in an HPS lamp

Arc Shape of High-Intensity Discharge Lamps: Simulation and Experiments

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