A high efficiency high power density AC-DC converter with holdup time extension capability

Author

Masaya Takahashi;Kimihiro Nishijima;Michihiko Nagao;Terukazu Sato;Takashi Nabeshima

Author_Institution

Dept. of Electrical and Electronic Eng, Oita University, Japan

fYear

2011

Firstpage

1

Lastpage

7

Abstract

This paper proposes a high efficiency high power density AC/DC converter with holdup time extension capability. The proposed AC/DC converter is composed of a proposed two-phase PFC circuit and a ZVS/ZCS current fed isolated converter. During brief interruption of input power, the proposed PFC circuit operates as a boost regulator in order to keep a constant output voltage. Bulk storage capacitors in the PFC circuit are almost discharged in the boost operation. As a result, the storage capacitor volume can be greatly reduced and low-withstandvoltage elements can be used for the rectifier elements in the secondary side of the isolated converter. A bridgeless PFC circuit with the proposed technique is presented as a family circuit. The proposed AC/DC converter is verified by a simulation and an experiment. A 300W/12V AC/DC converter prototype achieves 93% efficiency at full load.

Keywords

"Capacitors","Platinum","DH-HEMTs","Silicon","Smoothing methods","Gold"

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference (INTELEC), 2011 IEEE 33rd International

ISSN

2158-5210

Print_ISBN

978-1-4577-1249-4

Type

conf

DOI

10.1109/INTLEC.2011.6099801

Filename

6099801