Single-Stage Single-Phase H6 and H8 Non-Isolated Buck-Boost Photovoltaic Inverters

Usman Ali Khan, Ashraf Ali Khan, Fazal Akbar, Jung Wook Park

Research output: Contribution to journalArticlepeer-review


In this study, a novel full-bridge single-stage transformerless buck-boost inverters are proposed. The output ac voltage of the proposed inverters can be greater or lower than the input dc voltage depending on the duty ratio. The main features of the proposed inverters are their bidirectional capability, continuous output current, simple operation, handling of reactive power, and stepping up and down the input voltage in a single stage. The proposed inverters are named H8 and H6 buck-boost inverters. The proposed H8 inverter has only two switches working at high frequency at a time while the proposed H6 inverter has only one switch working at high frequency. As a result, the proposed inverters have low power losses and higher efficiency than most of the conventional topologies. Detailed circuit analysis of the proposed inverters is presented. To verify the performance of the proposed inverters, a hardware prototype of the proposed inverters are implemented and tested for the input voltage of 100-200 V, an output voltage of 110 Vrms at 60 Hz, and an output power of 800 W.

Original languageEnglish
Pages (from-to)4865-4878
Number of pages14
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number4
Publication statusPublished - 2022 Aug 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science and ICT (MSIT), Korean Government, under Grant 2020R1A3B2079407.

Publisher Copyright:
© 2013 IEEE.

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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