A New Standby Structure Based on a Forward Converter Integrated With a Phase-Shift Full-Bridge Converter for Server Power Supplies

Author

Cho, Shin-Young ; Lee, II-Oun ; Kim, Jae-Kuk ; Moon, Gun-Woo

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

Volume

28

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

336

Lastpage

346

Abstract

This paper presents a new standby structure where a forward converter is integrated with a dc-dc phase-shift full-bridge (PSFB) converter for server power supplies. While a typical standby structure consists of an independent flyback converter, the proposed standby structure is integrated with one leg of the dc-dc PSFB converter. Its main advantages are that the voltage across a standby switch is clamped at the link voltage across the link capacitor and that the standby switch achieves zero-voltage switching over entire load range. The validity of the proposed standby structure is confirmed by the experimental results from 12 V/58 A for the dc-dc output prototype and 11.5 V/1.5 A for the standby output prototype.

Keywords

DC-DC power convertors; capacitors; emergency power supply; switching convertors; zero voltage switching; current 1.5 A; current 58 A; dc-dc PSFB converter; dc-dc phase-shift full-bridge converter; forward converter; independent flyback converter; link capacitor; link voltage; server power supply; standby structure; standby switch; voltage 11.5 V; voltage 12 V; zero-voltage switching; Flyback transformers; Power supplies; Semiconductor diodes; Servers; Switches; Zero voltage switching; Forward; high efficiency; integration; server power supply; standby power; zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2012.2195507

Filename

6200879