Transformerless High-Voltage Resonant Charging Systems for Capacitive Energy Storage Devices for Electro-Discharge Technologies

Vinnychenko, Dmytro; Nazarova, Natalia; Vinnychenko, Iryna

doi:10.1109/elnano54667.2022.9927052

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…The study of the possibility of reducing the concentration of the chlorine agent during complex use with an electric discharge was carried out on a laboratory electric discharge installation [63] (Figure 1). The laboratory setup provided an operating voltage (U) of 15 to 25 kV, the capacitance of the capacitor bank (C) varied from 0.1 to 1 µF, and the discharge frequency (f ) was from 1 to 5 Hz.…”

Section: Methodsmentioning

confidence: 99%

Synergy Effect during Water Treatment by Electric Discharge and Chlorination

Malyushevskaya,

Koszelnik,

Yushchishina

et al. 2023

Environments

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Water treatment, such as disinfection, is an integral stage of its use for human life. The use of plasma technology with high-voltage electric discharge in a liquid for obtaining a bactericidal effect is discussed. It has been experimentally shown that among the factors accompanying a high-voltage electric discharge in a liquid and affecting the viability of bacteria, cavitation is the main one. Simultaneous use of electric discharge in the special cavitation mode and oxidizing agents makes it possible to achieve stable disinfection of water. At the same time, bactericidal doses of the oxidizing agent are reduced by a factor of 10 relative to existing standards, and the energy costs for electric discharge exposure, enhanced by small doses of an oxidizing agent, are reduced by 6 times compared to the costs of disinfection by only an electric discharge.

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Section: Methodsmentioning

confidence: 99%

Synergy Effect during Water Treatment by Electric Discharge and Chlorination

Malyushevskaya,

Koszelnik,

Yushchishina

et al. 2023

Environments

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“…High-voltage transformerless resonance chargers (TlRC) of capacitive energy storage devices (CESD) [2] can become an effective alternative to existing installations for testing the electrical strength of high-voltage cables with a rectified voltage of 70 kV. They could also be used instead of traditional chargers with step-up transformers in systems of electric discharge impulse processing of materials [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…They could also be used instead of traditional chargers with step-up transformers in systems of electric discharge impulse processing of materials [3,4]. As shown in [2], such systems will make it possible to significantly reduce the mass and dimensions of capacitor chargers and test facilities based on them. Power sources providing high voltage above 50 kV [5] or below [6,7] are usually required for electric discharge treatment of dielectric media.…”

Section: Introductionmentioning

confidence: 99%

Development of method for frequency regulation of output current in high-voltage transformerless resonant chargers of capacitive energy storage devices

Vinnychenko,

Nazarova,

Vinnychenko

2024

EEJET

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The object of research is high-voltage systems of electric discharge installations for various technological purposes. The work reports solving the problem of enabling the rate of charging of a capacitive energy storage, set by the requirements of a certain high-voltage technology. The quantitative characteristics of the deviation of the output current of the resonant inverter from the set stabilized value when changing the switching frequency of inverter switches in the range of output voltage change from 0 to 20 kV were determined. Using the Fourier transform of the rectangular input voltage, the frequency regulation possibility of the output current of the charger for capacitive energy storage devices was analyzed. Estimation dependences of the output current of resonant inverter on the load resistance and frequency deviation from resonant frequency were derived. These dependences could be used to implement frequency control over the switching inverter transistors, with the help of which the given effective value of the output current of the resonant inverter is obtained. A method of frequency regulation of the output current in high-voltage transformerless resonant charging devices of capacitive energy storage devices has been developed. Special feature of this method is that it is based on the frequency dependence of reactive resistances of the inductance and capacitance of the resonant circuit connected in series. Owing to that, it makes it possible to adjust the switching frequency of the inverter’s power switches depending on the relative resistance of the load and the specified growth rate of the capacitive energy storage voltage. The results reported here could be used in the design of benches for testing the electrical strength of high-voltage cables, as well as for the construction of high-voltage transformerless chargers in systems of electric discharge impulse processing of materials

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