Voltage Converter Based on an LLC Circuit

The master's dissertation contains 53 pages, 25 figures, 7 tables, 36 literature sources, 6 appendices. Keywords: LLC converter, resonant converters, computer technology, integrated elements, parasitic parameters, soft switching. The object of the study is a resonant converter based on an LLC circuit. The aim of the work is developing a step-down voltage converter based on a resonant LLC circuit with integrated elements in a transformer. In the course of the research was made the analysis of computer power supply systems, the creation of a mathematical and simulation model of an LLC converter, the design of a basic electrical circuit of an LLC converter, the design of a printed circuit board, and the development of related documentation were carried out. The simulation was made in LTspice and MathCad environments. The electrical schematic diagram is made in Altium Designer. As a result of the study, it was revealed that the use of parasitic transformer parameters as elements of the resonant circuit makes it possible to reduce the number of individual magnetic elements of the converter. Developed: an experimental sample that converts a voltage from 400 to 12.2 Volts; an electrical schematic diagram of an LLC converter. It is planned to further use the resulting converter in domestic power supplies for server equipment and computer equipment.