Řízení třífázového usměrňovače s funkcí PFC

Abstract

This final work initially focuses on various control methods that can be applied to three-phase rectifiers with PFC function. It focuses mainly on the Vienna rectifier, which forms one of the possible structures of these types of rectifiers. The next chapter then deals with methods of synchronization of 3-phase rectifiers with a network of low quality. The most used PLL method, which uses vector transformations for its operation, is highlighted and applied in the following simulations. The third chapter is devoted to the simulation verification of the selected method of vector PWM modulation control, which provides several advantageous properties, especially in terms of THD and switching losses arising on power switches. The fourth chapter mentions the control board, which was designed and subsequently assembled in cooperation. The final chapter aims to implement the selected control method in the control system and verify its basic functional elements. The appendices of the thesis contain the scanned results of PWM generation and measured values from A/D converters.