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Abstract

This article contains the results of modelling and researching the parameterization of DC-DC-converters, in particular, a converter output stage as a controlled object of the automatic control system. This research is focused on deriving the mathematical models of DC-DC-converters and their analysis. The operational analysis of a down DC-DC-converter frequency domain was made. The main part of a converter is a low pass filter (LPF). Unipolar pulse sequence is supplied in the LPF input. Output stage parameters are chosen by analyzing the signal spectrum components and the analytic form of a LPF transfer function. The research was made on the basis of various filter circuits: RC-circuit and RLC-circuit. There also made an operational analysis of a down DC-DC-converter in the time domain. Electronic switches were used for deriving a voltage source. Electronic switches are controlled by two pulse patterns. The research deals with organizing control modes of electronic switches. Difference equation systems, which describe a DC-DC converter operation, are given. This converter was modelled by means of the Miro-Cap circuit analysis program. The derived voltage and current waveforms of a DC-DC-converter with diode and transistor switches are given.