A Class of Single-Phase Z-Source AC-AC Converters with Magnetic Coupling and Safe-Commutation Strategy

Zeeshan Aleem, Hyoung Kyu Yang, Hafiz Furqan Ahmed, Simon L. Winberg, Jung Wook Park

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This article proposes a family of single-phase transformer based Z-source ac-ac converters (ZSACs). The proposed converters inherit all the benefits associated with the classical single-phase ZSAC, which are providing the buck-boost operation, maintaining or reversing the phase angle, and improving reliability. The proposed converters also have the improved input profile, continuous input current, and shared ground between input and output. Moreover, they use the turns ratio of transformers to produce the required voltage gain, which can be tuned by either increasing or decreasing the turns ratio of transformer depending on the configuration of Z-source structure. A safe-commutation strategy is also presented to achieve the soft commutation, which eliminates the voltage and current spikes without any additional snubber circuits. The features of proposed converters are comprehensively discussed with the detailed theoretical analysis. Thereafter, its performances are evaluated by both simulation and experimental tests.

Original languageEnglish
Article number9177331
Pages (from-to)8104-8115
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number9
Publication statusPublished - 2021 Sept

Bibliographical note

Funding Information:
Manuscript received January 8, 2020; revised April 5, 2020, May 8, 2020, and July 5, 2020; accepted August 4, 2020. Date of publication August 25, 2020; date of current version June 16, 2021. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (MIST), Korea government 2020R1A3B2079407. (Corresponding author: Jung-Wook Park.) Zeeshan Aleem, Hyoung-Kyu Yang, and Jung-Wook Park are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea (e-mail: zeeshan.aleem18@gmail.com; yanghg@yonsei.ac.kr; jungpark@yonsei.ac.kr).

Publisher Copyright:
© 1982-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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