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Zasilacz impulsowy o dużej impedancji między obwodem wejściowym i wyjściowym

Malczyk Jakub, Kampik Marian, Gonscz Damian

Przegląd Elektrotechniczny

2025

R. 101, nr 4

273--277

W artykule przedstawiono wyniki badań prototypu zasilacza impulsowego o dużej impedancji między obwodem wejściowym a wyjściowym. Układ charakteryzuje się relatywnie małą masą i gabarytami w porównaniu z układami zawierającymi baterie, akumulatory czy transformatory i cechuje go względnie mała wartość generowanych zaburzeń elektromagnetycznych oraz szumów. Rezystancja DC zmierzona między obwodem wejściowym zasilacza, przy napięciu pomiarowym 500 V jest większa od 10 TΩ, a pojemność między obwodem wejściowym i wyjściowym jest mniejsza od 13 pF i jest o około dwa rzędy niższa od pojemności występującej między obwodem wejściowym i wyjściowym komercyjnego zasilacza impulsowego, przeznaczonego do zastosowań medycznych.

The article presents the results of tests of a prototype of a switching power supply with high impedance between the input and output circuits. The system is characterized by relatively small mass and dimensions compared to systems containing batteries, accumulators or transformers and is characterized by relatively low value of generated electromagnetic disturbances and noise. DC resistance measured between the input circuit of the power supply, at a measuring voltage of 500 V is greater than 10 TΩ, and the capacitance between the input and output circuits is less than 13 pF and is about two orders of magnitude lower than the capacitance occurring between the input and output circuits of a commercial switching power supply intended for medical applications.

Electroadsorptive graphite electrode material for desalination of brackish water using capacitive deionisation (CDI) technique, DC-DC system

Chudjuarjeen S., Yoosamran A.

Journal of Achievements in Materials and Manufacturing Engineering

2024

Vol. 124, nr 1

34--41

Purpose: The Chao Phraya River is the main river in the central region. It is essential for consumption, agriculture, industry, and ecosystem conservation. In addition, in the area along the Chao Phraya River, there is agriculture, and industry is a source of conservation for many ecosystems. The support of brine from the sea has influenced the sea. The research aims to find the optimum conditions for applying the eelectro-adsorption technique to reduce salinity of the brackish water that can be used in agriculture. Graphite-type electrodes that are easily available and do not require surface treatment are used. Design/methodology/approach: The research aims to reduce the salinity value of brackish water salinity by DC to DC converter electro-sorption of the sample (790 μS.cm-1) with graphite electrode measuring the reduced electrical conductivity. The variables of salinity reduction, electric potential, temperature, and solution stirring have been studied. Removing ions from electrodes involves ultrasonic vibration and temperature. The important reason that graphite electrodes are used in electrosorption is that graphite is a good conductor. The structure of graphite is such that it has many electrons floating freely between the different layers. Findings: The research found that graphite electrodes could absorb electricity by controlling the electric potential (Charging) at 2.0 V for 25 min and at a temperature of 500C without stirring the solution while absorbing ions. It can reduce the salinity to 777 μS.cm-1, representing 1.64%. The optimum condition for washing electrodes used for 15 min at 2.0 V electrode potential for regeneration was washing electrodes without applying electrode potential (Discharge) in high-temperature water and with ultrasonic vibration. It can effectively wash off ions from the surface of graphite electrodes. Research limitations/implications: The ion adsorption of graphite electrodes was only electrical adsorption. Originality/value: The graphite materials have electrosorption properties at low potential and can be readily renewed by discharging the potential. They do not require surface treatment.