Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design of Power Supply for Green PC using Low Voltage High Current LLC Resonant Converter
Authors Young-Do Yoo ; In-Dong Kim ; Eui-Cheol Nho ; Myung-Hyo Ryu ; Ju-Won Baek
DOI 10.6113/TKPE/2014.19.3.211
Page pp.211-219
ISSN 1229-2214
Keywords green PC; LLC resonant converter; voltage compensator; ZVS(Zero Voltage Switching)
Abstract This paper proposes a low voltage high current LLC resonant converter for Green PC. Green PC is composed of a lot of blade PCs, and it is a centralized system to manage them in computer center. Green PC should require that its power supplies have several characteristics such as low output voltage, high output current, and high power conversion efficiency. Conventional PSFB (Phase Shift Full Bridge) converter is usually used as DC/DC converter for computer power supply because it has high power conversion efficiency thanks to ZVS (Zero Voltage Switching) operation under middle and high load conditions. However, this converter has some problems such as large switching noise and limitation of ZVS operation under light load condition. In order to improve the performance of power supply for Green PC, a new power supply using popular high efficiency LLC resonant converter for low voltage and high current application is proposed in this paper. The proposed power supply has ZVS capability over the entire load range, thus resulting in good efficiency and high switching frequency. Experimental results verify the performance of the proposed power supply for Green PC using 2[kW] (19[V], 105[A]) rated prototype converter.