A novel LLC multi-resonant DC-DC converter with an anti-resonant circuit

Author

Mizutani, Hiroto ; Mishima, Tomokazu ; Nakaoka, Mutsuo

Author_Institution

Grad. Sch. of Maritime Sci., Kobe Univ., Kobe, Japan

Volume

2

fYear

2012

fDate

2-5 June 2012

Firstpage

1328

Lastpage

1335

Abstract

A novel LLC multi-resonant DC-DC converter with an anti-resonant circuit is presented in this paper. The LLC DC-DC converter proposed herein can improve the sensitivity of voltage conversion ratio in the step-down area, and then achieve the excellent performance on the output voltage and power regulations by pulse frequency modulation (PFM) under soft switching conditions. The theoretical analysis and the experiment results on the essential switching and steady-state performances of the proposed DC-DC converter are described, and the practical effectiveness is verified. In addition, the performance comparison between the voltage doubler (VD) and full bridge (FB) diode rectifier applied for the proposed LLC DC-DC converter is discussed in terms of a conversion efficiency and soft switching performances.

Keywords

DC-DC power convertors; PWM power convertors; rectifiers; LLC multiresonant dc-dc converter; PFM; antiresonant circuit; full bridge diode rectifier; output voltage; pulse frequency modulation; soft switching conditions; soft switching performances; steady-state performances; step-down area; voltage conversion ratio sensitivity; voltage doubler; Capacitors; Frequency modulation; Resonant frequency; Switches; Transfer functions; Voltage control; Zero current switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference (IPEMC), 2012 7th International

Conference_Location

Harbin

Print_ISBN

978-1-4577-2085-7

Type

conf

DOI

10.1109/IPEMC.2012.6258990

Filename

6258990