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

Q3 Mathematics

Eastern-European Journal of Enterprise Technologies Pub Date : 2024-02-28 DOI:10.15587/1729-4061.2024.299031

D. Vinnychenko, Natalia S. Nazarova, Iryna Vinnychenko

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引用次数: 0

Abstract

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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电容式储能设备高压无变压器谐振充电器输出电流频率调节方法的开发

研究对象是用于各种技术目的的高压放电装置系统。工作报告解决了根据特定高压技术要求设定的电容式储能充电率问题。确定了在输出电压变化范围 0 至 20 kV 内改变逆变器开关的开关频率时，谐振逆变器输出电流偏离设定稳定值的定量特征。利用矩形输入电压的傅立叶变换，分析了电容式储能设备充电器输出电流的频率调节可能性。得出了谐振逆变器输出电流对负载电阻和谐振频率偏差的估计依赖关系。这些依赖关系可用于对开关逆变器晶体管实施频率控制，从而获得谐振逆变器输出电流的给定有效值。该方法的特点是基于串联谐振电路的电感和电容的无功电阻的频率依赖性。因此，可以根据负载的相对电阻和指定的电容储能电压增长率来调整逆变器电源开关的开关频率。本文报告的结果可用于设计测试高压电缆电气强度的工作台，以及在材料放电脉冲处理系统中建造高压无变压器充电器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Eastern-European Journal of Enterprise Technologies Mathematics-Applied Mathematics

CiteScore

2.00

自引率

0.00%

发文量

369

审稿时长

6 weeks

期刊介绍： Terminology used in the title of the "East European Journal of Enterprise Technologies" - "enterprise technologies" should be read as "industrial technologies". "Eastern-European Journal of Enterprise Technologies" publishes all those best ideas from the science, which can be introduced in the industry. Since, obtaining the high-quality, competitive industrial products is based on introducing high technologies from various independent spheres of scientific researches, but united by a common end result - a finished high-technology product. Among these scientific spheres, there are engineering, power engineering and energy saving, technologies of inorganic and organic substances and materials science, information technologies and control systems. Publishing scientific papers in these directions are the main development "vectors" of the "Eastern-European Journal of Enterprise Technologies". Since, these are those directions of scientific researches, the results of which can be directly used in modern industrial production: space and aircraft industry, instrument-making industry, mechanical engineering, power engineering, chemical industry and metallurgy.