A Family of Improved Dual-Buck DC-AC Inverters and Dual-Boost AC-DC Converters

Usman Ali Khan, Honnyong Cha, Jung Wook Park, Ashraf Ali Khan, Wilson Eberle

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Conventional cascaded dual-buck dc-ac inverters and dual-boost ac-dc converters can achieve high efficiency by using power MOSFETs without causing reverse recovery issues. In addition, these topologies can provide high reliability by eliminating shoot-through issues. As a result, dead-time in the switching signals can be eliminated and higher switching frequencies can be used. However, these topologies have a major and serious drawback of having more inductors in them and a high magnetic volume. This paper presents a family of improved dual-buck dc-ac inverters and dual-boost ac-dc converters with fewer inductors that can effectively mitigate the high magnetic volume and large number of inductors problems without adding any complexity to the control or hardware. The proposed dual-buck inverters (DBI) and dual-boost converters have all the aforementioned benefits of conventional DBIs and dual-boost converters, respectively. In addition, they reduce the magnetic volume, cost, and complexity of the circuit layout through the use of fewer inductors. To validate the feasibility of the proposed topologies, experimental results of the proposed 2-kW cascaded dual-buck dc-ac inverter with 310 Vdc input voltage and 420Vrms output voltage are provided.

Original languageEnglish
Article number8744365
Pages (from-to)2930-2942
Number of pages13
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number3
Publication statusPublished - 2020 Sept

Bibliographical note

Funding Information:
Manuscript received December 25, 2018; revised April 11, 2019; accepted May 30, 2019. Date of publication June 24, 2019; date of current version August 4, 2020. This work was supported in part by the Korea Institute of Energy Technology Evaluation and Planning (KETEP), in part by the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea under Grant 20194030202310, and in part by the National Research Foundation of Korea funded by the Korean government under Grant 2016R1E1A1A-02920095. Recommended for publication by Associate Editor Gerry Moschopoulos. (Corresponding author: Honnyong Cha.) U. A. Khan and J.-W. Park are with the Department of Electrical and Electronics Engineering, Yonsei University, Seoul 03722, South Korea (e-mail: usman_705@ymail.com; jungpark@yonsei.ac.kr).

Publisher Copyright:
© 2013 IEEE.

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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