Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Characteristics of Output Voltage and Input Current of Quasi Z-Source Converter with a Diode-Capacitor Output Filter

다이오드-커패시터 출력필터를 갖는 Quasi Z-소스 컨버터의 입력 전류와 출력전압 특성

  • 임영철 (전남대학교 전기공학과) ;
  • 김세진 (전남대학교 전기공학과) ;
  • 정영국 (대불대학교 융합기술학부)
  • Received : 2012.02.21
  • Accepted : 2012.05.16
  • Published : 2012.06.30
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Abstract

This paper proposes a quasi Z-source converter(QZSC) with a diode-capacitor output filter to improve the output DC voltage boost ability. The proposed converter has the same quasi Z-source network topology compared with the conventional converter. But the proposed method is adopted a diode-capacitor filter as its output filter, since the conventional method is used an inductor-capacitor as its output filter. Under the condition of the same input-output DC voltage, the proposed method has more lower shoot-through duty ratio than the conventional method. Also, because the proposed converter has same voltage boost factor under lower shoot-through duty ratio compared with the conventional converter, the proposed converter can be operated with the lower capacitor voltage of Z-source network and the lower input current. To confirm the validity of the proposed method, PSIM simulation and a DSP based experiment were performed to acquire the output DC voltage 120[V] under the input DC voltage 80[V]. And the capacitor voltage and inductor current in Z-source network, the output voltage of each converter were compared and discussed.

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References

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