A Novel Quadratic Buck–Boost Converter With Continuous Input Current and Reduced Voltage Stress on Power Components
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, ss.1-15, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/cta.70590
- Dergi Adı: INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
- Derginin Tarandığı İndeksler: Applied Science & Technology Source, Academic Search Ultimate (EBSCO), Scopus, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest), Aerospace Database, Science Citation Index Expanded (SCI-EXPANDED), Compendex, INSPEC, zbMATH
- Sayfa Sayıları: ss.1-15
- Ondokuz Mayıs Üniversitesi Adresli: Evet
Özet
This study proposes a novel quadratic DC–DC buck–boost converter topology specifically designed for integration with renewa-ble energy sources, such as photovoltaic systems. Owing to its quadratic voltage conversion characteristic, the proposed converterprovides enhanced step-up and step-down capabilities compared to conventional buck–boost converters, particularly when oper-ating under duty cycle conditions far from 50%. A critical review of existing quadratic buck–boost converter topologies indicatesthat voltage stress reduction is often achieved only partially, either on the MOSFET or on the diode, while the remaining deviceis subjected to high voltage stress, especially during boost mode operation at high duty cycles. To overcome these limitations,the proposed topology employs only two auxiliary capacitors to realize quadratic voltage gain while simultaneously maintaininglow voltage stress on both the MOSFET and the diode over a wide operating range. This structural feature significantly reducesconduction and switching losses, thereby improving overall efficiency. In addition, the converter delivers a noninverting outputvoltage with a common ground reference between the input and output, facilitating seamless integration into unipolar systems.The proposed converter also ensures continuous current at both input and output ports, which is particularly advantageous forapplications requiring stable power profiles. Notably, the converter achieves a unitary voltage gain at a duty cycle of 0.5 andoffers a wide voltage conversion range in both buck and boost operating modes. A comprehensive mathematical analysis of theconverter is presented, and the accuracy of the analytical results is validated through experimental studies, demonstrating closeagreement between theoretical predictions and measured performance.