Quasi Z-Source DC-DC Converter With Switched Capacitor

Abstract— The Z-source converter employs a unique Z-source impedance network to couple the converter main circuit to the power source which can buck or boost the input voltage. The Z-source network consists of two identical capacitors and two identical inductors in Xshape. The Z-source concept can be applied to all dc-to-ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversion. In this paper a quasi Zsource dc-dc converter with switched capacitor is introduced. Quasi Z-source dc-dc converter is derived from the conventional Zsource dc-dc converter. The proposed converter provide higher voltage gain with lower voltage stress of the impedance network capacitors. Moreover, its source and load current are continuous. The performance of the converter is verified using the MATLAB/SIMULINK.

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