Title :
A simple control scheme for improving light-load efficiency in a full-bridge LLC resonant converter
Author :
Jae-Hyun Kim ; Chong-Eun Kim ; Jae-Bum Lee ; Young-Do Kim ; Han-Shin Youn ; Gun-Woo Moon
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
Abstract :
In this paper, a load adaptive phase-shift control is proposed for the full-bridge LLC resonant converter to improve light-load efficiency. The proposed method reduces the effective duty ratio and the magnetizing current. Therefore, the core loss on transformer and the turn-off switching loss on switches are significantly reduced. To confirm the validity of this study, the prototype with 320~400V DC input, 12V/40A DC output is experimented.
Keywords :
adaptive control; electric current control; load regulation; power convertors; power transformers; core loss; current 40 A; current magnetization reduction; effective duty ratio reduction; full-bridge LLC resonant converter; light-load efficiency improvement; load adaptive phase-shift control; switches; transformer; turn-off switching loss; voltage 12 V; Frequency control; Logic gates; Moon; Reactive power; LLC resonant converter; light load efficiency; phase shift control;
Conference_Titel :
Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International
Conference_Location :
Hiroshima
DOI :
10.1109/IPEC.2014.6869819
