Open AccessHighly accurate analysis method for LLC dc–dc converters with an improved transformer circuit model
Author(s) -
Ryu SeungHee,
Lee ByoungKuk
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.0572
Subject(s) - converters , transformer , electronic engineering , electrical engineering , network analysis , dc bias , equivalent circuit , computer science , engineering , voltage
An improved transformer circuit model is proposed for performing a more accurate analysis of LLC dc–dc converters. In the proposed model, the inductances and turns ratio are expressed by a coupling coefficient k . With the help of newly defined parameters for the transformer, voltage gain and switching frequency can be predicted with high accuracy and therefore it becomes possible to design a considerably practical design of the LLC dc–dc converter. The validity of the analysis method using the proposed transformer circuit model is verified by experimental results with a 500 W prototype.