This paper presents an impedance-source power converter (abbreviated as Z-source inverter) (ZSI). Z-source have recently been examined and investigated as alternative for traditional inverters. The Z-source converter uses LC impedance network to couple the main converter circuit to the power source, which provides the boosting of input voltage that is not possible in traditional voltage-source (or voltage-fed) inverter (VSI) and current-source (or current-fed) inverter (CSI). The Z-source inverter (ZSI) overcomes the conceptual and theoretical barriers and limitations of the traditional voltage-source converter (abbreviated as V-source converter) and current-source converter (abbreviated as I-source converter) and provides a novel power conversion concept. The Z-source concept is new electronic circuit recently recognized because of its application in all dc-to-ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversion.

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Voltage Source Inverter Current Source Inverter Z-source Inverter.