Comparison Between Traditional Inverter And ZSource Inverter

Authors : P.Rajivgandhi, P.Selvaraj, A.Adhithan, P.Velmurugan

Volume/Issue : Volume 2 - 2017, Issue 5 - May

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The new Z-Source Inverter (ZSI) advantageously utilizes the shoot through state to boost the dc bus voltage by gating on both upper and lower switches of a phase leg and produce a desired output voltage that is greater than the available dc bus voltage. In addition the reliability of the inverter is greatly improved because the shoot through due to misgating can no longer destroy the circuit. Thus it provides a lowcost, reliable, and high efficiency single stage structure for buck and boost power conversion. The proposed switched qZSI inherits all the advantages of the switched ZSI and features its unique merits. It can realize buck/boost power conversion in a single stage with a wide range of gain that is suited well for application in PV power generation systems. Furthermore, the proposed switched qZSI possesses continuous input current, reduced source stress, and lower component ratings when compared to the traditional ZSI.


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