Multi-level inverter with a full-bridge clamp circuit for a single-phase three-wire grid

Yuichi Noge, Jun Ichi Itoh, Takayuki Karaki, Hiroki Watanabe

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A multi-level inverter with a full-bridge clamp circuit is proposed for single-phase three-wire (1P3W) utility connected applications such as PV systems. The proposed inverter consists of two n-level inverters and a full-bridge clamp circuit. The proposed inverter requires only 12 controllable switches to obtain a five-level output voltage even though conventional multi-level converters with the grounded neutral point of the DC-bus require 16 switches. The control strategy for the proposed circuit is also discussed in this paper. The proposed circuit was confirmed to satisfy the FRT (Fault Ride Through) requirements. Finally, in the event of a load unbalance during self-sustained operation, the experimental results confirmed that the grid voltage maintained a balanced state.

Original languageEnglish
Pages (from-to)944-952
Number of pages9
JournalIEEJ Transactions on Industry Applications
Issue number12
Publication statusPublished - 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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