Title :
A novel topology for single phase UPS systems
Author :
Su, Gui-Jia ; Ohno, Tetuhiko
Author_Institution :
Sanken Electr. Co. Ltd., Saitama, Japan
Abstract :
A novel converter topology suitable for on-line single-phase UPS systems is presented. The converter, based on an AC-DC/DC-DC boost converter combined with a half bridge inverter, uses only five active switches to realize very desirable features. These include sinusoidal input currents, a common neutral connection-eliminating the requirement of an isolation transformer, capability of voltage balancing control for DC bus capacitors, low voltage storage battery as well as its charge or discharge regulations. Further, voltage stresses on the switches in the boost converter are greatly reduced, compared with conventional half bridge converters. Detailed simulation results and experimental results are included in this paper
Keywords :
AC-DC power convertors; DC-DC power convertors; bridge circuits; invertors; switching circuits; uninterruptible power supplies; voltage control; AC-DC/DC-DC boost converter; DC bus capacitors; active switches; boost converter; charge regulations; common neutral connection; discharge regulations; half bridge converters; half bridge inverter; isolation transformer elimination; low voltage storage battery; single phase UPS systems; sinusoidal input currents; voltage balancing control; voltage stresses; Analog-digital conversion; Bridge circuits; Capacitors; DC-DC power converters; Inverters; Switches; Switching converters; Topology; Uninterruptible power systems; Voltage control;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.629036
