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Bidirectional DC–DC converter with high gain based on impedance source

Abstract:

This study presents a new bidirectional DC–DC converter with high gains, based on impedance source. The design of the impedance network has been studied in step-up and step-down modes. The most significant innovations of the proposed converter are the linearity of the high gains in step-up and step-down modes with respect to the cycle variations and a full use of the duty cycle, very few passive and semiconductor elements are needed to implement the converter. The switching techniques are very simple, since only the switching of a single transistor in each mode is required. To improve efficiency, the cores of the inductors have been constructed with nanocrystalline material and the resistance of Z-red has been reduced as much as possible. Finally, a laboratory prototype has been implemented.