| Title |
Characteristics of Output Voltage and Input Current of Quasi Z-Source Converter with aDiode-Capacitor Output Filter |
| Authors |
Young-Cheol Lim ; Se-Jin Kim ; Young-Gook Jung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2012.26.6.016 |
| Keywords |
Quasi Z-source Converter(QZSC) ; Diode-Capacitor Output Filter ; Inductor-Capacitor Output Filter ; Voltage Boost Ability ; Shoot-Through Duty Ratio ; Capacitor Voltage ; Output Voltage ; Input Current |
| 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. |