High efficiency N+1 server power supply under light load using integrated Bi-directional converter = 통합된 양방향 컨버터를 이용한 경부하 고효율 N+1 서버용 전원장치

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In this paper, a new power conversion scheme using integrated non-isolated bi-directional converter for the high efficiency N+1 server power supply under light load conditions. By using the snubber circuit, the phase-shift full-bridge (PSFB) converter can apply proposed method under light load conditions. The snubber capacitor is changed to the electrolytic capacitor and each snubber capacitor of the server power supplies is connected via bus for using the auxiliary voltage source and the snubber diodes are changed to switches for operating the bi-directional converter in the secondary side. By operating only the master’s secondary side as buck converter, the core loss in the transformer and the switching loss in the primary side can be decreased. Therefore, the proposed method shows the significantly improved efficiency under light load conditions. The proposed method can be most attractive solution for the redundant parallel power system as a server power system requiring high efficiency under light load conditions. The feasibility of the proposed converter was verified by experimental results with the 1+1 prototypes of 750W, 330~400V input, 12V-62.5A output conditions.
Advisors
Moon, Gun-Wooresearcher문건우Youn, Myung-Joong윤명중
Description
한국과학기술원 : 전기및전자공학과,
Publisher
한국과학기술원
Issue Date
2014
Identifier
592414/325007  / 020124458
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 2014.8, [ ii, 50p. ]

Keywords

high efficiency; light load; RCD snubber circuit; non-isolated bi-directional converter; 서버용 전원장치; 여분의 병렬 파워시스템; 경부하; 고효율; RCD스너버 회로; 비절연 양방향 컨버터; Server power system; redundant parallel power system

URI
http://hdl.handle.net/10203/196668
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=592414&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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