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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Nasir Hussein Selman
Al-Furat Al-Awsat Technical University
Control & Systems Engineering Electrical & Electronics Engineering

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Design and analysis of modified single switch AC-DC bridgeless Cuk converter Abdullah Sahib Abdulsada; Hassan Wahhab Salih; Nasir Hussein Selman
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 3: September 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i3.pp1902-1913

Abstract

The Cuk converter is widely used in power electronics due to its ability to provide both step-up and step-down voltage conversion with low ripple characteristics. However, conventional designs suffer from increased component count, higher losses, and significant voltage stress on switching devices. In this paper, an improved single-switch bridgeless AC-DC Ćuk converter is proposed for power factor correction (PFC) and loss reduction. The proposed topology employs a two-stage integrated structure with two low-value coupling capacitors (1 µF each). These capacitors effectively reduce voltage stress across the main switch and enhance switching performance. The operating principles of the proposed converter are analyzed under different switching conditions, highlighting its improved dynamic behavior and reduced component stress. Simulations using MATLAB/Simulink show that the proposed design achieves high efficiency, very low output voltage ripple (less than 1%), and a near-unity power factor of 0.9988. This performance, particularly the fast dynamic response, was achieved using a specially designed proportional-integral (PI) controller for output voltage regulation. The converter demonstrates fast dynamic response with a settling time of less than 0.23 s and a maximum overshoot of 7.5% under sudden load and input variations. Compared to conventional two-switch topologies, the proposed design significantly reduces switch voltage stress while maintaining a simpler structure, leading to lower cost and compact size. These results confirm that the proposed converter is a promising solution for high power quality applications.
Co-Authors Abdullah Sahib Abdulsada Hassan Wahhab Salih