Ripple‐Free Input Current Quadratic Converter Based on Watkin–Johnson Topology
Journal
IET Power Electronics
ISSN
1755-4535
1755-4543
Publisher
Institution of Engineering and Technology (IET)
Date Issued
2025-01
Author(s)
Brenda Lizeth Reyes‐García
Pedro Martín García‐Vite
Marco Antonio Coronel‐García
Francisca Hernández Angel
Type
text::journal::journal article
Abstract
This article proposes a power electronics converter capable of providing high voltage gain while keeping a high‐quality input current ripple operating with low duty cycle. The technique for achieving the zero input current ripple at a selected duty cycle consists of extracting two inductor currents from the source in a counter‐phase manner. The technique is similar to those employed in interleaved converters, maintaining the high voltage gain. The quadratic‐type voltage gain makes the proposed converter suitable for low‐voltage renewable energy sources, such as PV panel generation. Another important topology feature is the common reference to the output voltage; that is, the load and source share the negative terminals. The high voltage gain is achieved by cascading two particular power cells. On the input side, a modified buck‐boost converter is connected, while the second stage consists of an H‐bridge based on the Watkin–Johnson topology. The H‐bridge configuration consists of two capacitors, one inductor, and a pair of transistors and diodes to control the voltage gain, which provides polarity selection flexibility. This paper includes the mathematical development in continuous conduction mode operation, providing design guidelines. Besides, two commutation techniques are proposed to obtain direct or inverse polarity. The modeling is validated via simulation, and an experimental lab‐scale corroborates its performance. The validation includes open‐loop performance, demonstrating low input current ripple, and a closed‐loop configuration that confirms proper output voltage regulation.
License
Acceso Abierto.
URL License
How to cite
B. L. Reyes-García, P. M. García-Vite, H. R. Robles-Campos, M. A. Coronel-García, J. C. Rosas-Caro, and F. H. Angel, “ Ripple-Free Input Current Quadratic Converter Based on Watkin–Johnson Topology.” IET Power Electronics 18, no. 1 (2025): e70122. https://doi.org/10.1049/pel2.70122
Table of contents
1 Introduction -- 2 Proposed Topology -- 3 WJ-Based Quadratic Boost Converter -- 4 Losses Analysis -- 5 Comparison with Other Topologies -- 6 Design Example for the Proposed Converter -- 7 Simulation Results -- 8 Output Voltage Control -- 9 Experimental Results -- 10 Conclusion.