Study of the combined buck-boost DC-DC converter in the composition of high-voltage energy-converting equipment

Abstract: The article is devoted to the development of a numericalanalytical mathematical model of a combined buck-boost DC-DC converter for the analysis of its work as part of highvoltage energy-converting equipment. The scheme of the considered DC-DC converter, the ratings of the components of the power part of the device, ensuring the operation of the device for a load of not more than 1 kW, are given. The output voltage diagrams in various operating modes are shown, as well as two-parameter device bifurcation diagrams, which allow determining areas of normal operation of the device, characterized by minimal output voltage ripples and excluding the occurrence of subharmonic oscillations.

Keywords: combined buck-boost dc-dc converter, mathematical model, two-parameter bifurcation diagram, area of normal operation