Experimental Study of High Step-Up Quasi-Z-Source DC-DC Converter with Synchronous Rectification

2015 9th International Conference-Workshop on Compatibility and Power Electronics (CPE): Proceedings 2015
Liisa Liivik, Andrii Chub, Dmitri Vinnikov, Jānis Zaķis

Quasi-Z-source DC-DC converters have attracted research interest due to their numerous advantages in emerging applications. However, they suffer from relatively low efficiency. This paper presents semiconductor loss breakdown of the quasi-Z-source DC-DC converter to show that conduction losses in semiconductors contribute most to overall losses. Synchronous rectification realized through replacement of diodes with N-channel MOSFETs was proposed to improve the converter efficiency in prior works. Our detailed experimental study of efficiency improvement with synchronous rectification was based on a 250 W prototype. Results were first obtained for replacement of diodes in the primary side only, then in the secondary side only. Finally, a converter that contains only controlled switches was evaluated. Efficiency curves measured were compared with those for the baseline diode-based topology. The experimental study was performed using operating points typical of photovoltaic module integrated converters.

Atslēgas vārdi
DC-DC converter, synchronous rectification, quasi-Z-source, power losses, photovoltaic energy converter
DOI
10.1109/CPE.2015.7231110

Liivik, L., Chub, A., Vinnikov, D., Zaķis, J. Experimental Study of High Step-Up Quasi-Z-Source DC-DC Converter with Synchronous Rectification. No: 2015 9th International Conference-Workshop on Compatibility and Power Electronics (CPE): Proceedings, Portugāle, Costa da Caparica, 24.-26. jūnijs, 2015. Piscataway, NJ: IEEE, 2015, 409.-414.lpp. ISBN 978-1-4799-6301-0. ISSN 2166-9546. Pieejams: doi:10.1109/CPE.2015.7231110

Publikācijas valoda
English (en)