| Title |
A Study on the Output Voltage and Efficiency of the Single-Phase Z-Source Inverters According to Duty Ratio |
| Authors |
Seung-Pyo Hong ; Young-Gook Jung ; Young-Cheol Lim |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2011.25.8.008 |
| Keywords |
Z-Source Inverters ; Efficiency and Output voltage ; Shoot-through Duty Ratio. CCM ; DCM |
| 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[Ω] and 60[㎐] 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. |