Design of a Single-Phase Rectifier with Improved Power Factor and Low THD using Boost Converter Technique

Rosnazri Ali,Ismail Daut,Soib Taib

doi:10.3844/ajassp.2006.2025.2028

Abstract

The method of using Boost type of converter was proposed for a 300W single-phase rectifier in this paper. By designing the necessary techniques and methodology, the overall Power Factor (PF) and Total Harmonic Distortion would be improved to the expectation. The cause of having low PF and high THD for a diode-capacitor type of rectifiers is related to non-linearity of the input current. Method of re-shaping the input current waveform to be similar pattern as the sinusoidal input voltage is done by the Boost converter and the related controls that act as a Power Factor Correction (PFC) circuit. The results of the designed system were compared against with and without PFC control. The international standard IEC 61000-3-2 on harmonics was used as the reference to determine the performance of the project.

Highlights

Principle of operationDC power supplies are extensively used inside most of electrical and electronic appliances in the world today, such as in computers, monitors, televisions, audio sets and others
The nature of rectifiers either it is conventional or switch mode types, all of them contribute to low Power Factor (PF), high total harmonic distortion (THD) and low efficiency to the power system
The objective of this proposal was to develop a circuit with all the necessary components and control system that will in-cooperated into the design of any single-phase rectifier improves the PF and reduces the current harmonics

Summary

Introduction

Principle of operationDC power supplies are extensively used inside most of electrical and electronic appliances in the world today, such as in computers, monitors, televisions, audio sets and others. The nature of rectifiers either it is conventional or switch mode types, all of them contribute to low PF, high THD and low efficiency to the power system. The objective of this proposal was to develop a circuit with all the necessary components and control system that will in-cooperated into the design of any single-phase rectifier improves the PF and reduces the current harmonics.

Results

Conclusion