Analysis on the influence of the secondary parasitic capacitance to ZVS transient in LLC resonant converter

Author

Hui Chen ; Xinke Wu

Author_Institution

Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

4755

Lastpage

4760

Abstract

This paper analyzes the (zero voltage switching) ZVS process mechanism considering the parasitic capacitance of the secondary rectifier in an LLC resonant converter and presents the design considerations to guarantee the fully realization of the soft switching. When an LLC resonant converter is used as an unregulated converter (DCX) in telecom applications, the secondary parasitic capacitance has a significant influence on the ZVS process, and the dead time calculation is different from the conventional method. This influence, which is rarely analyzed in the literatures, is presented in this paper. Experimental results of an LLC converter prototype are provided to verify the theoretical analysis.

Keywords

capacitance; rectifiers; resonant power convertors; transient analysis; zero voltage switching; LLC resonant converter; ZVS transient; dead time calculation; secondary parasitic capacitance; secondary rectifier; soft switching; telecom application; unregulated converter; zero voltage switching process mechanism; Capacitance; Capacitors; Equivalent circuits; Magnetic resonance; Oscillators; Rectifiers; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6954052

Filename

6954052