A Bulk-Capacitance Reduction Method Using Self-Driven Thyristor for AC-DC Converters

Universal serial bus power delivery (USB-PD) fast chargers equipped with wide-bandgap devices are driven to higher power density and efficiency. Furthermore, the indispensable high-voltage bulk capacitors used to smooth the rectifier output could take 40% of the total system volume due to the large...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on power electronics Vol. 37; no. 1
Main Authors Cui, Han, Jia, Niu, Xue, Lingxiao
Format Journal Article
LanguageEnglish
Published United States IEEE 29.06.2021
Subjects
30 DIRECT ENERGY CONVERSION
bridge circuits
capacitance
capacitors
discharges (electric)
prototypes
rectifiers
threshold voltage
Online AccessGet full text

Cover

More Information
Summary:Universal serial bus power delivery (USB-PD) fast chargers equipped with wide-bandgap devices are driven to higher power density and efficiency. Furthermore, the indispensable high-voltage bulk capacitors used to smooth the rectifier output could take 40% of the total system volume due to the large capacitance value required. This paper discussed a capacitor reduction method using a self-driven thyristor scheme comprised of only three components in total. No extra control circuit is needed. Circuit analysis and design equations are presented, and the design results are implemented in a 60-W GaN-based active-clamp flyback converter. The measurement results on the prototype show a 36.4% reduction of the bulk-capacitor size with similar efficiency compared to the conventional solution.
Bibliography:USDOE
AC05-00OR22725
ISSN:0885-8993
1941-0107