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http://dx.doi.org/10.5207/JIEIE.2011.25.8.008

A Study on the Output Voltage and Efficiency of the Single-Phase Z-Source Inverters According to Duty Ratio  

Hong, Seung-Pyo (전남대학교 전기공학과)
Jung, Young-Gook (대불대학교 융합기술학부)
Lim, Young-Cheol (전남대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.25, no.8, 2011 , pp. 8-19 More about this Journal
Abstract
This paper was compared for the output voltage and efficiency of the single-phase Z-source inverter(ZSI) according to shoot through duty ratio D. The eight single-phase ZSI in this study are typical ZSI, Embedded ZSI(EZSI), Improved ZSI(IZSI), Quasi ZSI(QZSI), Series ZSI, Trans ZSI(TSI), Switched inductor ZSI(SL-ZSI) and Extended boost ZSI (exZSI). The eight ZSI are divided into two Groups. ; Group-1 which is ZSI with the ordinary voltage boost factor B, and Group-2 which is ZSI with the maximum voltage boost factor B. For the execution of the proposed study, the PSIM simulation was achieved under the condition of input DC voltage=150[V] of ZSI, load =30[${\Omega}$] and 60[Hz] output filter. The output voltage and efficiency of each ZSI were calculated within the limits of D=0.1~0.4. As a result, the output peak voltage of Group-2 was suddenly increased in a specified duty ratio D, and its efficiency was rapidly decreased. On the contrary, Group-1 shown the output and efficiency characteristics without sudden change compared to Group-2 despite the duty ratio increase. The efficiency of the Group-2 was sharply declined at duty ratio D of the most output voltage, but, in case of Group-1, the efficiency was slightly declined. Finally, the input DC current of ZSI with DCM and CCM was discussed.
Keywords
Z-Source Inverters; Efficiency and Output voltage; Shoot-through Duty Ratio; CCM; DCM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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