Close loop analysis of a single phase high-efficiency AC-DC CUK converter with low input current THD and improved power factor

Abstract

In this paper, design and analysis of a novel single phase AC-DC converter based on ĆUk topology is proposed. Performance comparisons are shown between open loop and closed loop configurations of the proposed converter which reveals that the inconsistencies arising in open loop connection can be mitigated sufficiently by adding PFC controller to it. The closed loop technique applied to the proposed bridgeless converter results in low input current THD at input AC mains along with near unity (0.99) power factor. Thus, significant improvements in overall power quality of the system is achieved despite the absence of input side filtering. The proposed circuit is also non-burdensome as it gets rid of bulky filtering capacitors. The aforementioned circuit performances are observed based on software simulations using PSIM 9.1 professional environment.