Modeling and Analysis of Multipulse Uncontrolled/Controlled AC-DC Converters

Abstract

This paper deals with input current shaping of uncontrolled and controlled rectifiers using multipulse current shaping concept. The rectifier circuits investigated in this paper feed R-L loads. The developed mathematical model of multipulse converters emulates the behavior of various multipulse current shaping methods. The mathematical model is capable of replicating the operating behavior for converters with any number of rectifiers; 6-, 12-, 18-, 24-, 36-, and 48-pulse diode/thyristor converters. The comparative study given in this paper covers cases on uncontrolled and controlled rectifiers. As part of the simulated results on converter performance, data related to the total harmonic distortion (THD), ripple in the output voltage, and power efficiency is provided