This paper proposes two coupled-inductorsbased Z-source networks, called the modified series and tapped switched-coupled-inductors quasi-Z-source networks -mSSCL-qZSN and mTSCL-qZSN-. These networks offer high voltage gains with less-than-unity winding turn ratios - n<1 - resulting in reduced inductive element size. Other achievements can be mentioned as less number and rating of active components and higher efficiency. In addition, a lower magnetic core size is required for the proposed Z-source networks due to the lower peak magnetizing current. The performance principles and detailed comparative analysis are provided and confirmed through experiments on a 200W DC-DC converter.

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