Quasi-Clamped ZSI with Two Transformers

Zeeshan Aleem, Hyoung Kyu Yang, Hafiz Furqan Ahmed, Jung Wook Park

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In this article, we present a new type of Z-source inverter (ZSI) that replaces two inductors in the original quasi-ZSI with two transformers. It can produce a very high output voltage with the high value of the modulation index. Moreover, it enables both to provide a better power quality of output and to reduce the switching loss. In particular, the proposed quasi-clamped ZSI with two transformers give a unique solution to obtain high gain by reducing the turns ratio, rather than increasing it. Also, the leakage inductance of the transformer might cause huge voltage spikes across the inverter bridge. To deal with this problem, an effective clamping technique is proposed. As a result, this increases the overall efficiency of the system by utilizing the low-power switching devices. The characteristics of the proposed quasi-clamped ZSI with two transformers are comprehensively discussed with the detailed theoretical analysis. Thereafter, its performances are evaluated by both simulation and experimental tests.

Original languageEnglish
Article number9219158
Pages (from-to)9455-9466
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number10
Publication statusPublished - 2021 Oct

Bibliographical note

Publisher Copyright:
© 1982-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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