ELEC5504: Power Electronics Lab 1 - Three-Phase Rectifier Report

This document presents a comprehensive analysis of three-phase rectifiers, covering both diode and thyristor-based designs. The assignment begins with an investigation of uncontrolled half-wave and full-wave diode rectifiers, examining their operational characteristics, including conduction angles, ripple frequency, ripple voltage, and output power. Simulation experiments are used to determine these parameters and compare theoretical values to measured results. The analysis extends to both positive and negative polarity outputs. The report then explores three-phase full-wave bridge rectifiers, comparing their performance to half-wave rectifiers. The second part of the assignment focuses on thyristor-based rectifiers, exploring the impact of firing angle control on the output voltage and the differences between resistive and resistive-inductive loads. The report includes detailed calculations, comparisons between theoretical and simulated results, and discussions of the advantages and disadvantages of different rectifier configurations, including the impact of filter capacitors on ripple voltage. It concludes with an analysis of dual-polarity dc power supplies and the effects of filter capacitors.