A nonisolated single-phase UPS topology with 110-V/220-V input-output voltage ratings

被引：27

作者：

Branco, Carlos G. C. ^{[1
]}

Cruz, Cicero M. T. ^{[2
]}

Torrico-Bascope, Rene P. ^{[2
]}

Antunes, Fernando L. M. ^{[2
]}

机构：

[1] Fed Ctr Technol Educ Ceara, Ind Area, BR-60040531 Fortaleza, Ceara, Brazil

[2] Univ Fed Ceara, Dept Elect Engn, Energy Proc & Control Grp, BR-60020181 Fortaleza, Ceara, Brazil

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2008年 / 55卷 / 08期

关键词：

common neutral connection; online uninterruptible-power-supply (UPS) systems; power-factor correction; soft commutation; transformerless UPS;

D O I：

10.1109/TIE.2008.918478

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A circuit configuration of a single-phase nonisolated online uninterruptible power supply (UPS) with 110-V/220-V input-output voltage ratings is proposed, allowing the bypass operation without a transformer even if the input voltage is different from the output voltage. The converter consists of an ac-dc/dc-dc three-level boost converter combined with a double half-bridge inverter. In this type of configuration size, cost and efficiency are improved due to the reduced number of switches and batteries, and also, no low-frequency isolation transformer is required to realize bypass operation because of the common neutral connection. Both stages of the proposed circuit operate at high frequency by using a passive nondissipative snubber circuit in the boost converter and insulated-gate bipolar-transistor switches in the double half-bridge inverter, with low conduction losses, low tail current, and low switching losses. Principle of operation and experimental results for a 2.6-kVA prototype are presented to demonstrate the UPS performance.

引用

页码：2974 / 2983

页数：10

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