Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Enhanced Voltage Gain Single-Phase Current-Fed qZ-Source Inverter
Authors Hyun-Hak Shin ; Hon-Nyong Cha ; Heung-Geun Kim
DOI 10.6113/TKPE/2013.18.4.305
Page pp.305-311
ISSN 1229-2214
Keywords buck-boost; full-bridge inverter; single-phase qZ-source inverter; voltage gain
Abstract This paper proposes a performance improvement of existing single-phase current-fed qZ-Source inverter. Voltage gain of the traditional voltage-fed full-bridge inverter and single-phase current-fed qZ-source inverter is only equal to or smaller than input voltage. The proposed inverter can obtain twice higher voltage gain than the single-phase current-fed qZ-Source inverter by adding an extra switch and a capacitor in the circuit. In addition, the proposed inverter shares the common ground between dc input and ac output voltage. Therefore, the proposed inverter can eliminate the possible ground leakage current problem when it is used for grid-tied photovoltaic inverter system. A 120 W prototype inverter is built and tested to verify performances of the proposed inverter.