Analysis of a Novel Single Phase AC-DC CUK Converter with Low Input Current, THD to improve the overall power quality using PFC Shadman Sakib 1* , Ahmed Jawad Kabir 2# , Md. Shajal Khansur 1$ , Md. Jewel Rana 1@ 1 Department of EEE, International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh 2 Department of EEE, Independent University of Bangladesh, Dhaka 1229, Bangladesh sakibshadman15@gmail.com and 15305026@iubat.edu * , jawadkabir192@gmail.com # , shajalkhansur@gmail.com $ , jewel75rana@gmail.com @ , Corresponding Author: 15305026@iubat.edu * Abstract— In this paper, analysis and design of a novel single phase AC-DC CUK converter circuit has been proposed where Power Factor Correction (PFC) controller scheme has been used in order to obtain better performance than conventional converters. Closed loop technique is applied to the bridgeless converter in order to achieve low input current, Total Harmonic Distortion (THD) at input AC mains along with near unity power factor. Performance comparison between open loop and closed loop of the proposed converter is made without filtering. The problems arise with open loop is sufficiently minimized by using power factor correction controller. The performance comparison between proposed and conventional CUK AC- DC converter operating in Continuous Conduction Mode (CCM) is made based on circuit simulations using PSIM softwere. Index Terms— CUK Converter, PFC, THD, CCM, PWM, PSIM, SEPIC Converter —————————— ◆ —————————— 1 INTRODUCTION In recent years, a variety of DC operating applications have soared in usage and numbers. As traditional AC-DC converters suffer due to low quality input currents, high quality rectifiers are in demand in order to uphold the international regulatory policies. Several methods are in use to improve the overall power quality of the system. Research works are ongoing to bring in new techniques too. Passive filtering improves the THD but it has low input power factor and involves bulky capacitor and inductor [1]. Active filtering requires smaller sized filter than passive filtering but a DC-DC converter must follow after it [2], [3], [4], [5], [6]. On the other hand, CUK topology is advantageous than other topologies due to several reasons but very few significant works have been done on this. CUK converter is better than buck-boost converter as it has continuous input-output current and supplies energy to load both when the switch is open and close. CUK circuit has reduced circuit parameters than SEPIC converter, hence the cost is also reduced [7], [8], [9], [10]. 2 PROPOSED CONVERTER 2.1 CUK Converter The proposed converter is shown in figure 1(a). L 1 AC V in D 4 C in1 C in2 D 3 L 2 D 1 D 2 C o R L S V o c 1 C 2 L 3 L 4 D 5 D 6 (a) AC V in C o R L D 1 D 3 D 2 D 4 L 2 D 5 C 1 S L 1 (b) Figure 1. CUK Converter (a) Proposed (b) Conventional Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 26 November 2018 © 2018 by the author(s). Distributed under a Creative Commons CC BY license. Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 26 November 2018 doi:10.20944/preprints201811.0591.v1 © 2018 by the author(s). Distributed under a Creative Commons CC BY license.