RESEARCH OF THE CHARACTER OF HARMONIC DISTORTIONS AND HEAT LOSSES OF THE INVERTER DURING OUTPUT VOLTAGE FORMATION

Increasing the effectiveness of visualization systems for performing tasks in modern combat operations is possible with adequate situational awareness through the use of automatic threat detection technologies. An important aspect of the development of such visualization systems is the study of the influence of the inverter's PWM frequency on the quality of its output voltage formation. As a result of the switching processes of the inverter's power elements, distortions of the given harmonic signal occur. In addition, as is known, this process is also accompanied by heat losses. Therefore, the study of the degree of influence of harmonic signal distortions and heat losses on the energy efficiency of the visualization electrotechnological complex depending on the PWM frequency is relevant. To quantitatively assess the degree of influence of these factors, a study of the functioning of the developed design of a two-layer printed circuit board was conducted. The selection and arrangement of the board elements were carried out in accordance with the technical requirements for the implementation of the inverter, taking into account the condition for ensuring the minimization of electromagnetic interference in the compact design of such devices. The development of the board and the study of its functioning were carried out using the Proteus software environment. When developing the printed circuit board, a circuit solution was provided to smooth out the possible occurrence of high-frequency oscillations and short-term current peaks when connecting the power part of the inverter to a DC power supply. The ATmega128-16AU microcontroller was selected to generate control signals for the IR2104 gate drivers of the inverter's power MOSFET transistors. The results of the research indicate that with an increase in the inverter's PWM frequency, harmonic distortion decreases. The shape of this dependence is hyperbolic. At the same time, an increase in the PWM frequency leads to an increase of heat losses.