This paper examines a new topology of the AC‐AC Z‐source converter based on asymmetric Gama structure is proposed. The proposed converter has all the common features such as common ground between input and output, realizing the continuous input current and the ability of boost in‐phase and buck out of‐phase. In order to generate a high voltage gain in the proposed converter, a coupled inductor with Gama structure is used. In this structure, as the turn ratio approaches to one, it gives a higher voltage gain. In order to damping the voltage and current overshoots on the proposed converter switches, a safe commutation strategy is used. Due to the specific topology of the proposed converter, the output filter has been eliminated, so the size and cost of the proposed converter are reduced. Circuit analysis and performance principles are presented in detail and a laboratory prototype implemented to confirm the practicality of the proposed converter.

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A new topology of the high step-up Z-source converter is proposed, which does not need to work at high duty cycles to increase the voltage gain. In other words, this converter can generate high voltage gain in low duty cycles. In addition to these advantages, the converter has advantages such as low voltage stress across the passive components, common ground between the input and output, and continuous input current. The proposed converter will be analysed in shoot-through and non-shoot-through operating modes, and then, the minimum size of the used elements in the converter will be calculated and designed, then the loss analysis has occurred. Finally, the experimental results are presented to validate the claims, and the closed-loop control is given for the proposed converter.

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