Return to search

Study and Improvement of Single-Stage Power Factor Correction Techniques

This thesis work focuses on the study and improvement of single-stage power factor correction techniques.

The generalized structures of the present pulse-width-modulation (PWM) integrated single-stage power factor correction (PFC) converters are presented. The typical PFC cells in the single-stage PFC converter are identified. After that, the necessary PFC condition is derived and verified to understand the principle of the single-stage PFC converters.

As an example, the continuous current mode (CCM) current source single-stage PFC converter is studied. The circuit intuitions and design consideration of this converter are presented. Also, an improved current source single-stage PFC converter with a low-frequency auxiliary switch is proposed to overcome the problem of the previous converter. Experimental verification shows the improvement is effective.

To evaluate single-stage PFC technique, a comparison study between the current source single-stage and the boost two-stage PFC converters is done in this thesis. It shows that for universal line application, due to the wide bus-capacitor voltage range, single-stage PFC converters have higher component ratings than two-stage PFC converters. This limits the application of single-stage PFC converter. Therefore, an interesting future work will be how to reduce the bus voltage range of single-stage PFC converters. / Master of Science

Identiferoai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/36938
Date31 August 1998
CreatorsZhang, Jindong
ContributorsElectrical and Computer Engineering, Lee, Fred C., Lai, Jih-Sheng, Chen, Dan Y.
PublisherVirginia Tech
Source SetsVirginia Tech Theses and Dissertation
Detected LanguageEnglish
TypeThesis
Formatapplication/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf
RightsIn Copyright, http://rightsstatements.org/vocab/InC/1.0/
RelationABSTRACT.PDF, ACKNOWLEDGMENT.PDF, ILLUSE-FIGS.PDF, CONTENTS.PDF, CHAP1.PDF, CHAP2.PDF, CHAP3.PDF, CHAP4.PDF, CHAP5.PDF, REF.PDF, VITA.PDF, TITLE1.PDF

Page generated in 0.0023 seconds