Development of a Variable Frequency, Constant Power, High Voltage Power Supply for Driving Dielectric Barrier Discharges
Dr. Mark Masters
Department of Physics
Indiana University – Purdue University Fort Wayne
Here we present the construction of the necessary equipment to investigate the electrical excitation frequency dependence of Dielectric Barrier Discharge (DBD) emissions. A DBD is a type of electrical discharge occurring between two electrodes just as many other discharges. However, in a DBD at least one electrode is covered with an insulating material which prohibits the formation of a complete arc. Instead a small amount of charge seeps through the insulator and builds up on its surface until a small discharge (in the form of a filament) can form. This happens all across the surface of the insulator at such a rate that the space near the insulator becomes filled with a haze of filaments. The light emitted from this plasma includes a significant amount of ultraviolet radiation. When combined with the energetic ions present in the plasma, DBDs can be used as a means of sterilization. What is unknown is how the emission from a DBD depends upon frequency of the excitation source.
The most difficult part to performing this investigation is a power source that provides variable frequency at a constant power. We present our custom, variable-frequency, high voltage power supply and the subsequent tests of the same.
Physical Sciences and Mathematics | Physics
Siri, Mattison, "Development of a Variable Frequency, Constant Power, High Voltage Power Supply for Driving Dielectric Barrier Discharges" (2015). 2015 IPFW Student Research and Creative Endeavor Symposium. 79.