This paper deals with a new Cuk Topology for Power Factor Correction (PFC). Most of the front-end PFC converters are implemented using diode bridge and this results in the lower efficiency due to significant losses with reduced power factor. This new Cuk converter is a bridgeless Cuk PFC converter with two semiconductors switches. The current flow path in converter during each interval of the s...

This paper presents a power factor corrected (PFC) new bridgeless (BL) Cuk Topologies for low power applications. A BL configuration of Cuk converter is proposed which eliminates the usage of diode bridge rectifier at the front end of the PFC converter, thus reducing the switching and conduction losses coupled with it. This new BL Cuk converter has two semiconductors switches. The current flow ...

This article presents an analysis of grid connection excited induction generator, where inrush current is significantly reduced and voltage drop in the local eliminated. In proposed method, generator to done at moment when vector equals vector, but frequency differs from frequency. Excitation provided by a power electronic converter, which rated only on reactive generator. Moreover, connected g...

Fractured tectonic zones with developed groundwater are one of the major causes water inrush in construction igneous tunnels; thus, it is highly important to assess risk inrush. In this study, a total six evaluation attributes, level, amount water, permeability coefficient, strength surrounding rock, rock integrity, and width jointed fault fracture zone, were selected for assessment inrush, fuz...