Nonisolated DC-DC Converters with Wide Conversion Range for High-Power Applications

George Harrison De Alcantara Bastos, Levy Ferreira Costa, Fernando Lessa Tofoli, Grover Victor Torrico Bascope, Rene Pastor Torrico Bascope

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)


This paper presents the conception of a family of dc-dc converters with wide conversion range (WCR) based on the multistate switching cell (MSSC) for high-power, high-current applications. The resulting topologies allow achieving high-voltage step-up/step-down in a modular approach, as the WCR-MSSC cell is obtained by using isolated secondary windings coupled to the autotransformer of the MSSC with series-connected controlled rectifiers. Depending on the transformer turns ratio, it is possible to adjust the static gain and reduce the voltage stresses across the main switches, thus allowing the use of metal-oxide-semiconductor field-effect transistors (MOSFETs) with low on-resistance RDS(ON), as efficiency is improved as a consequence of minimized conduction losses. A dc-dc boost-type converter based on the four-state switching cell is also implemented, thoroughly analyzed, and evaluated experimentally to demonstrate the advantages associated with the proposed approach in the conception of novel dc-dc converter topologies for this purpose.

Original languageEnglish
Article number8612910
Pages (from-to)749-760
Number of pages12
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number1
Publication statusPublished - Mar 2020
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received July 30, 2018; revised November 12, 2018; accepted January 5, 2019. Date of publication January 15, 2019; date of current version February 3, 2020. This work was supported in part by the Conselho Nacional de Desenvolvimento Científico e Tecnológico, in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, in part by the Fundação de Amparo à Pesquisa do Estado de Minas Gerais, and in part by the Instituto Nacional de Energia Elétrica. Recommended for publication by Associate Editor Wilson Eberle. (Corresponding author: René Pastor Torrico Bascopé.) G. H. de Alcântara Bastos is with the Federal Institute of Education, Science, and Technology of Ceará, Caucaia 61609-090, Brazil (e-mail:

Funding Information:
The authors would like to thank CAPES, CNPq, FAPEMIG, and INERGE for their support to this paper.


  • DC-DC converters
  • multistate switching cell (MSSC)
  • step-up dc-dc converters
  • wide conversion range (WCR)


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