The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Single-Phase Transformerless Inverter using Passive Bypass Filter

수동 바이패스 필터를 이용한 단상 무변압기형 인버터

  • Yang, Min-Kwon (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Heo, Jun (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Lee, Myung-Chul (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Kim, Yu-Jin (Division of Electronic Engineering, Chonbuk Nat'l University) ;
  • Choi, Woo-Young (Division of Electronic Engineering, Chonbuk Nat'l University)
  • Received : 2018.01.31
  • Accepted : 2018.02.28
  • Published : 2018.04.20
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Abstract

Previous single-phase transformerless inverters used active bypass switching circuits that need auxiliary power switches to minimize ground leakage current. However, switching and gate driving losses are increased due to the use of additional power switches. To cope with this drawback, this work proposes a transformerless inverter using a passive bypass filter without any auxiliary power switch. The operation and control of the proposed inverter are described. The ground leakage current characteristics are analyzed for the proposed inverter with the passive bypass filter. The experimental results of the proposed inverter for a 1.0kW prototype system are presented.

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References

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