TY - GEN
T1 - Current-fed quasi-Z-source inverter with coupled inductors
AU - Yang, Shuitao
AU - Lei, Qin
AU - Peng, F. Z.
AU - Inoshita, Ryosuke
AU - Qian, Zhaoming
PY - 2009
Y1 - 2009
N2 - The quasi-Z-source inverters (qZSIs) were recently proposed as an important improvement to the traditional Z-source inverters (ZSIs). Besides the advantages inherited from the ZSIs, the qZSIs also have several of their own merits, such as reduced passive component ratings, continuous input current configuration, and so on. Unlike the traditional current source inverter (CSI) that can only boost voltage and allow unidirectional power flow, also differently from voltage-fed ZSI/qZSI that needs to replace the diode with a switch to achieve bidirectional power flow, the current-fed qZSI features voltage buck-boost and bidirectional power flow with an additional diode. There are three inductors in the current-fed qZSI, and the design of these three inductors is very important to the size, cost, and performance of the inverter. This paper presents a design of three-winding coupled inductors for the current-fed qZSI, which can effectively reduce the inverter size and weight. For the magnetic core and winding wire selection, the inductor currents and the current stress of the switches are analyzed in detail in both motoring operation and energy regeneration operation. A 5 kVA current-fed qZSI prototype, based on the novel reverse blocking IGBT (RB-IGBT) module, was developed in the laboratory. Experimental results are shown to verify the theoretical analysis.
AB - The quasi-Z-source inverters (qZSIs) were recently proposed as an important improvement to the traditional Z-source inverters (ZSIs). Besides the advantages inherited from the ZSIs, the qZSIs also have several of their own merits, such as reduced passive component ratings, continuous input current configuration, and so on. Unlike the traditional current source inverter (CSI) that can only boost voltage and allow unidirectional power flow, also differently from voltage-fed ZSI/qZSI that needs to replace the diode with a switch to achieve bidirectional power flow, the current-fed qZSI features voltage buck-boost and bidirectional power flow with an additional diode. There are three inductors in the current-fed qZSI, and the design of these three inductors is very important to the size, cost, and performance of the inverter. This paper presents a design of three-winding coupled inductors for the current-fed qZSI, which can effectively reduce the inverter size and weight. For the magnetic core and winding wire selection, the inductor currents and the current stress of the switches are analyzed in detail in both motoring operation and energy regeneration operation. A 5 kVA current-fed qZSI prototype, based on the novel reverse blocking IGBT (RB-IGBT) module, was developed in the laboratory. Experimental results are shown to verify the theoretical analysis.
KW - Buck-boost
KW - Coupled inductor
KW - Current source inverter (CSI)
KW - Regeneration capability
KW - Voltage source inverter (VSI)
KW - Z-source inverter
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U2 - 10.1109/ECCE.2009.5316489
DO - 10.1109/ECCE.2009.5316489
M3 - Conference contribution
AN - SCOPUS:72449136811
SN - 9781424428939
T3 - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
SP - 3683
EP - 3689
BT - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
T2 - 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009
Y2 - 20 September 2009 through 24 September 2009
ER -