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

The Korean Institute of Power Electronics (전력전자학회)
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Characteristics of the Stress Reduction and Output Voltage of ST(Switched Trans) Quasi Z-Source Inverter

ST Quasi Z-소스 인버터의 스트레스 저감과 출력전압 특성

  • Kim, Se-Jin (Dept. of Electrical Engineering, Chonnam Nat'l University) ;
  • Jung, Young-Gook (Dept. of Electrical Engineering, Daebul University) ;
  • Lim, Young-Cheol (Dept. of Electrical Engineering, Chonnam Nat'l University)
  • Received : 2012.09.24
  • Accepted : 2012.11.07
  • Published : 2013.02.20
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Abstract

This paper proposes a ST(Switched Trans) quasi Z-source inverter using a Switched Trans Cell combing the characteristics of a Switched Inductor Cell and Trans. A DC link inductor of the conventional quasi Z-source inverter is alternated with Switched Trans Cell of the proposed ST quasi Z-source inverter. Trans Cell of the proposed method consists of one Trans and two diodes, and the proposed method has higher and more various boost function than the conventional quasi Z-source inverter by simply changing the turns ratio of primary and secondary of the Trans. The validity of the proposed ST Z-source inverter was confirmed by PSIM simulation and a DSP based experiment under the input voltage 48V and output phase voltage 30V. As a result, when compared with the traditional quasi Z-source inverter, the proposed method has the advantage of the low voltage stress under the same output voltage condition of the voltage.

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References

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