Typical Transformer-Based Z-Source/Quasi-Z-Source Inverters

Poh Chiang Loh, Yushan Liu, Haitham Abu-Rub

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter discusses the typical trans and LCCT Z-source/quasi-Z-source inverters (ZSIs/qZSIs). Their configurations, working operations, voltage and current principles, and simulation results are presented, providing a demonstration of the investigation of other extended transformer-based ZSIs/qZSIs. The two DC current blocking capacitors connected in series with the transformer also prevent the transformer core from saturating. The only difference is the charging/discharging of magnetizing inductance in the trans-Z-source inverter, rather than discrete inductances found in the conventional Z-source inverter. They showed improved performance compared to the basic ZSI/qZSI in terms of reduced element counts, compact passive components, and high voltage boosting ability. The unique topology of the LCCT passive input circuit also helped to prevent the transformer core from saturating. Also, by using high switching frequency power devices, such as silicon carbide (SiC) transistors and SiC diodes, high power density is expected for those transformer-based derivations of ZSI/qZSI.

Original languageEnglish
Title of host publicationImpedance Source Power Electronic Converters
Number of pages15
ISBN (Electronic)9781119037088
ISBN (Print)9781119037071
Publication statusPublished - 7 Sep 2016



  • Compact passive components
  • High voltage boosting ability
  • Quasi-Z-source inverters
  • Reduced element counts
  • Silicon carbide
  • Z-source inverters

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Loh, P. C., Liu, Y., & Abu-Rub, H. (2016). Typical Transformer-Based Z-Source/Quasi-Z-Source Inverters. In Impedance Source Power Electronic Converters (pp. 113-127). wiley. https://doi.org/10.1002/9781119037088.ch7