Double DC-DC converter for uninterruptible power supply applications

Author

Sato, E.K. ; Kinoshita, M. ; Sanada, K.

Author_Institution

Power Electron. Syst. Div., TMEIC, Kobe, Japan

fYear

2010

fDate

21-24 June 2010

Firstpage

635

Lastpage

642

Abstract

This paper presents a double DC-DC converter for uninterruptible power supply applications. The converter has a simple structure and is applied to a high capacity uninterruptible power supply (UPS). In comparison with a conventional DC-DC converter, a double DC-DC converter exhibits lower ripple current and offers many benefits to UPS systems such as size/weight reduction and higher efficiency. The double DC-DC converter was implemented in a transformerless three-level UPS with capacity of 750kVA, rated at a nominal input/output voltage of 480V. Test results confirm the excellent transient performance of the proposed equipment as well as the high DC-DC-AC efficiency (about 97%) during the discharging mode. The overall design of the proposed UPS aims to contribute to greening critical facilities such as information technology (IT) systems by delivering high reliability and high efficiency in a compact footprint.

Keywords

DC-DC power convertors; uninterruptible power supplies; apparent power 750 kVA; double DC-DC converter; information technology systems; transformerless three-level UPS; uninterruptible power supply applications; voltage 480 V; DC-DC power converters; Information technology; Power conversion; Power electronics; Power supplies; Pulse width modulation converters; Space technology; Switches; Uninterruptible power systems; Voltage; Insulated gate bipolar transistors; power conversion; pulse width modulated power converters; uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (IPEC), 2010 International

Conference_Location

Sapporo

Print_ISBN

978-1-4244-5394-8

Type

conf

DOI

10.1109/IPEC.2010.5543341

Filename

5543341