Implementation of an efficiency indicator in an electrical modeling of a Dielectric Barrier Discharge Lamp

IEEE Trans. Plasma Sci.

Bhosle

Díez

et al. 2010

UV excimer lamps are efficient narrowband sources of UV radiation with applications in various domains. The issue of controlling the UV emission by means of the power supply associated with such lamps favors pulsed current-controlled generators. After having established the previous statements, we propose a dedicated power converter topology which implements the needed performances. The analysis of the degrees of freedom of this structure shows the capability of this pulsed supply to realize the control of both the pulses' current energy and of the mean power transferred to the lamp. Actual experimental realizations and measurement are presented and the feasibility and the performances of the proposed solutions are established.

Section: Correlation Between Gas Current and Uv Emissionmentioning

confidence: 99%

Pulsed Current-Mode Supply of Dielectric Barrier Discharge Excilamps for the Control of the Radiated Ultraviolet Power

IEEE Trans. Plasma Sci.

Bhosle

Díez

et al. 2010

“…A strong relationship is consequently bonding UV emission and current. lt can be experimentally observed in [8].…”

Section: Introductionmentioning

confidence: 82%

“…Nevertheless, we have developed an electrical model of an excilamp, based on physics considerations, which contains a radiation indicator. It was described in detail in [8].…”

Section: Electrical Model Of a Dbd Excilampmentioning

confidence: 99%

Innovative power supply concepts for DBD excilamps

Bhosle²,

Díez³

et al. 2007

SPIE Proceedings

Excimer and exciplex UV/VUV sources excited by Dielectric Barrier Discharges represent a promising technology for industrial applications where powerful and efficient UV sources are needed. According to previous work, the most suited power supply waveform for coaxial DBD Excilamps is a unipolar pulsed voltage excitation of some kilovolts at some hundred of kilohertz with a duty cycle around one percent.We present here new concepts for energy supplying of coaxial DBDs, based on the direct control of the current in the lamps. These concepts have been tested by means of simulation models developed in our department and the time evolution of the UV radiation is presented for various considered current waveforms.Based on these results, a power supply topology has been designed for an efficient power transfer to the Excilamp. It is based on a converter which controls the current flowing through the DBD. The results concerning the coupling of this converter with a DBD load are commented.

“…The polarity of this voltage varies with the gas current direction. This model has been developed and used in previous works [9], [12], [19].…”

Section: A Simplified Dbd Electrical Modelmentioning

confidence: 99%

“…This additional current ripple (Δi − out and Δi + out ) cannot be governed by the hysteretic control law (V in < v lamp_peak and f control < f lamp ); instead, it must be limited using the appropriate value of L. The maximum total ripple for i out could be (16) and (17) in (18), the inductance value necessary to accomplish the desired total ripple Δi out is computed with (19), shown at the bottom of the page.…”

Section: DC Input Voltage Of the Two-quadrant Choppermentioning

confidence: 99%

Square-Shape Current-Mode Supply for Parametric Control of the DBD Excilamp Power

Florez

Díez

IEEE Trans. Ind. Electron.

et al. 2015

With the aim of providing a power supply for the study of dielectric barrier discharge (DBD) excimer lamps (excilamps), a current-mode converter that allows for an accurate adjustment of the electrical power injected into one of those lamps is designed and implemented. Starting from the electrical model of the DBD lamps, the convenience of using a current-mode supply to control the lamp power is demonstrated. With the proposed converter, the current supplied to the lamp has a trapezoidal almost-square shape controlled by means of three parameters, namely, amplitude, duty cycle, and frequency, which provides full control of the lamp electrical power. Implementation is made considering a step-up transformer interfacing the high-voltage lamp with the converter. Experiments demonstrate the operating principle of this converter, including ultraviolet power measurements for a DBD XeCl excilamp. The capabilities of the converter are used to analyze the lamp behavior under different combinations of these three parameters, illustrating its capabilities for finding the optimal operating point of a DBD reactor.Index Terms-Current control, dielectric, dielectric barrier discharge (DBD), excimer lamp (excilamp), ultraviolet (UV).