Title :
A hybrid static/rotary UPS system
Author_Institution :
Reliance Electr. Co., North Mankato, MN, USA
Abstract :
An uninterruptible power supply (UPS) system is proposed. It uses a simple square-wave inverter driving a synchronous or induction motor-generator set to produce low-distortion isolated power. This power was shown to have advantages over both static UPS and standard rotary UPS systems, including reduced output impedance, reduced distortion with nonlinear loads, higher reliability, and better isolation. A 200 kVA system of this type installed at a large computer facility has resulted in significantly improved power availability.<>
Keywords :
AC motors; electric generators; invertors; uninterruptible power supplies; 200 kVA; computer facility; hybrid static/rotary UPS system; induction motor-generator set; low-distortion isolated power; nonlinear loads; reduced distortion; reduced output impedance; reliability; square-wave inverter; synchronous motor generator set; uninterruptible power supply; Batteries; DC motors; Frequency; Impedance; Inverters; Maintenance; Power conditioning; Power system protection; Power system reliability; Uninterruptible power systems;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1990. APEC '90, Conference Proceedings 1990., Fifth Annual
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/APEC.1990.66444
