A novel method oriented to evaluate the real characteristics of practical buck zero-voltage switching quasi-resonant converters

Author

Polyzos, Nicolaos P. ; Tatakis, Emmanuel C. ; Safacas, Athanasios N.

Author_Institution

Dept. of Electr. & Comput. Eng., Patras Univ., Greece

Volume

16

Issue

3

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

316

Lastpage

324

Abstract

The output characteristics of buck zero-voltage switching quasi-resonant converters (ZVS-QRCs), presented in previously published works, are calculated considering equal input and output energies. Nevertheless, measurements that were taken with breadboarded buck ZVS-QRCs demonstrate an important deviation between the results of the theoretical analysis and the experimental data. This deviation becomes greater when the load current increases. This paper deals with a novel simulation method to approximate the real behavioral characteristics of Buck ZVS-QRCs. Analytical expressions are derived to calculate the power losses in each power converter component as well as the DC-voltage conversion ratio. Computer simulation results are confronted to experimental ones proving the effectiveness of the proposed method

Keywords

DC-DC power convertors; load (electric); losses; resonant power convertors; switching circuits; DC-voltage conversion ratio; DC/DC power conversion; behavioral characteristics; buck zero-voltage switching quasi-resonant converters; computer simulation; load current; output characteristics; power converter component; power losses; real characteristics evaluation; simulation method; Computational modeling; Computer simulation; DC-DC power converters; Power semiconductor switches; Pulse width modulation converters; Stress; Switching converters; Switching frequency; Topology; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.923763

Filename

923763