Title :
Approximate Analysis of Resonant LLC DC-DC Converter
Author :
Ivensky, Gregory ; Bronshtein, Svetlana ; Abramovitz, Alexander
Author_Institution :
Electr. & Comput. Eng. Dept., Ben Gurion Univ. in the Negev, Beer-Sheva, Israel
Abstract :
This paper presents an approximate analysis of LLC resonant converter with capacitive filter operating above and below resonance. An equivalent ac resistance model of the rectifier valid for discontinuous as well as continuous conduction modes is proposed. The dc voltage conversion ratio is then obtained using the fundamental harmonic approximation analysis method. Based on the analysis, LLC converter design plots and guidelines are suggested. The theory is verified by simulation and experiment.
Keywords :
DC-DC power convertors; approximation theory; power filters; rectifying circuits; resonant power convertors; DC voltage conversion ratio; capacitive filter; continuous conduction modes; discontinuous conduction modes; equivalent AC resistance model; fundamental harmonic approximation analysis method; rectifier; resonant LLC DC-DC converter; Approximation methods; Converters; Harmonic analysis; Inductors; Power harmonic filters; Rectifiers; Resistance; DC-DC conversion; LLC; resonant circuits;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2011.2142009
