Abstract
High step-up Y-source coupled-inductor impedance network boost dc–dc converter with common ground and continuous input current is presented in this paper. The proposed converter has added auxiliary diodes and capacitors to three-winding Y-shaped coupled-inductor cells to constitute the current conduction path and realize the voltage-double function. Compared to other magnetically coupled boost converters, the proposed converter can produce the higher voltage gain with more degrees of freedom in winding match. The same output gain can be obtained by using different winding turn ratios. Also, the proposed converter has a common ground and realizes the continuous input current. The corresponding topologies and steady operation principles are analyzed. The experimental results in a 300-W prototype have verified the validity of the theoretical analysis.
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