ANALYSIS OF CONVERSION POWER OF SWITCHED-MODE BUCK CONVERTERS WITH TWO POWER SOURCES

Abstract

The article is devoted to the problem of searching for ways to increase the power density of switched-mode electrical energy converters. The analysis of circuitry solutions is aimed at reducing the conversion power – the power that is converted through magnetic field of inductor that converts the parameters of electrical energy. It is shown that this problem is not well understood and requires further research. This determined the purpose of this article. The analysis of electrical processes of switched-mode buck converters with two power sources with different voltages is performed. Relations are obtained for the transfer characteristic and the converted power of the switched-mode buck converters with two power sources with different voltages. The dependences of the output voltage and the conversion power of the converter are researched. The results of the research show that the schemes considered are a more general case of buck converters and have significant potential for increasing power density. The article also provides examples of the use of buck converters with two power sources: inverter and switched-mode voltage regulator of an industrial grid. The article is intended for a wide range of electronics developers, including for specialists engaged in research of switching electrical energy converters.