A new on-line single-phase to three-phase UPS topology with reduced number of switches

Author

Bekiarov, S.B. ; Emadi, A.

Author_Institution

Electr. Power & Power Electron. Center, Illinois Inst. of Technol., Chicago, IL, USA

Volume

1

fYear

2003

fDate

15-19 June 2003

Firstpage

451

Abstract

This paper presents design considerations and performance analysis of a new on-line single-phase to three-phase uninterruptible power supply (UPS) system with reduced number of switches. The proposed new UPS system consists of an integrated rectifier/boost converter with power factor correction (PFC) capabilities and a two-leg inverter connected to a split DC-link bus. Two battery sets are directly connected to the DC-link bus resulting in a very simple system. The proposed topology uses only 6 active switches reducing the cost of the system compared to the traditional 7, 8, and 10-switch topologies. It has sinusoidal input current with unity power factor and high quality output voltages even with nonlinear loads. Detailed circuit operation and analysis as well as simulation and experimental results are presented.

Keywords

DC-DC power convertors; invertors; power factor correction; rectifying circuits; uninterruptible power supplies; 1.5 kVA; 120 V; 208 V; 60 Hz; DC-link bus; circuit operation; high quality output voltages; integrated rectifier/boost converter; nonlinear loads; on-line single-phase to three-phase UPS topology; power factor correction; sinusoidal input current; split DC-link bus; switches; two-leg inverter; uninterruptible power supply; unity power factor; Batteries; Circuit topology; Costs; Inverters; Performance analysis; Power factor correction; Reactive power; Rectifiers; Switches; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual

ISSN

0275-9306

Print_ISBN

0-7803-7754-0

Type

conf

DOI

10.1109/PESC.2003.1218333

Filename

1218333