Jednofázový střídač s nastavitelným výstupním napětím a elektronickou proudovou pojistkou

Abstract

This master thesis deals with single-phase voltage inverters. The first part of the text is devoted to a general description of selected topologies. Two-level and multilevel topologies are described, including topologies with clamping diodes and flying capacitors. In the next part, the design of an LLC resonant DC-DC converter is described. Next, the design of an inverter without clamping diodes with a TNPC topology is described. For the designed inverter, a control structure in a closed loop is proposed. The control is performed in a rotating reference frame. The Park transform is used to convert to a rotating frame, for which the orthogonal system is created by using a second-order generalized integrator. In addition to AC voltage regulation, a structure for DC voltage regulation is also created. Finally, the design of an electronic current fuse is described.