A new transformerless quadratic buck–boost converter with high‐voltage gain ratio and continuous input/output current port. Issue 13 (4th May 2022)

• Record Type: Journal Article
• Authors: Okati, Mustafa; Eslami, Mahdiyeh; Jafari Shahbazzadeh, Mehdi; Shareef, Hussain
• Is Part Of: IET power electronics. Volume 15:Issue 13(2022)
• Page Start: 1280
• Page End: 1294
• Publication Date: 2022-05-04
• Subjects: Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/pel2.12304
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract: A new transformerless quadratic buck–boost converter with a common ground and a high‐voltage gain ratio of D /(1− D ) 2 is proposed in this study. The output and input currents of the proposed structure are continuous due to the presence of inductive filters in the output and input ports. The continuity of the output current simultaneously reduces the voltage ripple and also the capacitor stress at the output port. With the proposed quadratic structure, a lower total switching device power and a higher voltage gain ratio are attained at the same duty cycle. Due to the advantages of the proposed structure, it can be widely used with renewable energy. The presented model is investigated in terms of steady‐state analysis, continuous conduction mode, small‐signal modelling, and efficiency with parasitic resistance effects. To validate the performance of the proposed converter, experiments are conducted in the laboratory to claim the theoretical waveforms obtained from the piecewise linear electrical circuit simulation (PLECS) simulation.