PLASMA GENERATOR AT ATMOSPHERIC PRESSURE AND LOW TEMPERATURE
Journal Title: EcoTerra (Journal of Environmental Research and Protection) - Year 2010, Vol 24, Issue 24
Abstract
This paper presents the practical implementation of a plasma generator. This aparatus is capable to generate plasma in air atmosphere at low pressure and low temperature. This device in conjunction with a spectrometer analyser is a usefull tool that can be used to determine the chemical composition of earth probe. Because the earth probes must be taken from different sites, the aparatus must to be mobile, low weigth and low power consumption. The electronic solution to generate plasma is a class E power amplifier. The paper presents the advantages and disadvantages of this kind of circuit, and the solutions used to eliminate this disadvantages. The most important disadvantages of class E power amplifier for our application is that the load impedance of the amplifier must do not vary more then 10 %, but the equivalent impedance of plasma vary from a very high impedance to aproximatively 110kΩ-200kΩ. The proposed solution is to use a magnetic amplifier that realise an impedance matching between output impedance of power amplifier and equivalent impedance of plasma, and also increase the output voltage to the value needed to obtain plasma.
Authors and Affiliations
Alin GRAMA, Dorin PETREUŞ
Keywords
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- EP ID EP144830
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