A new power-factor-corrected single-transformer UPS design

被引：35

作者：

Morrison, R ^{[1
]}

Egan, MG

机构：

[1] Natl Univ Ireland Univ Coll Cork, PEI Technol, Cork, Ireland

[2] Natl Univ Ireland Univ Coll Cork, Dept Elect Engn, Cork, Ireland

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2000年 / 36卷 / 01期

关键词：

bidirectional single transformer; power-factor correction; trapezoidal voltage; uninterruptible power supply; zero-voltage switching;

D O I：

10.1109/28.821812

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Phenomenal growth in the personal computer (PC) market has fueled a corresponding growth in the need for uninterruptible power supplies (UPS's) to back up the utility and prevent loss of data, This paper presents a new off-line UPS design suitable for PC backup applications. It is based on a novel isolated ac/dc converter derived from the integration of a nonisolated buck-boost ac/dc converter with an isolated bidirectional dual active bridge dc/dc converter. The features of the design include input power-factor correction, a single high-frequency transformer for charging and backup, simple control, inherent current limiting, low switch voltage stresses, and zero-voltage switching of the switches over a wide operating range. The UPS output voltage is trapezoidal in shape and the transition slope can be set such that the output current crest factor is close to unity provided the values of the line biter capacitors of the PC are known.

引用

页码：171 / 179

页数：9

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