Abstract
This paper describes the newly developed 2-5kVA high-frequency isolation type UPS (Uninterruptible Power System).
The major feature of this UPS is the adoption of a novel SMR (Switch Mode Rectifier) in the input converter.
SMR, as a single converter which provides functions for high-frequency isolation, enhancement of input power factor and stabilization of DC output voltage. The use of novel circuits configuration, the volume and weight have also been reduced to about 1/2 as compared with conventional commercial frequency isolation systems, furthermore higher conversion efficiency has been realized.
