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High Voltage Gain DC-DC Converter Based on Two-Coupled-Inductor
Author(s): 
Pages: 104-112
Year: Issue:  8
Journal: Transactions of China Electrotechnical Society

Keyword:  Renewable resourcesquadratic Boost convertercoupled-inductorhigh voltage gainpassive lossless snubber circuit;
Abstract: High voltage gain non-isolated DC-DC converter with two-coupled-inductor is presented in this paper. Based on single switch quadratic boost topology, by incorporating coupled-inductor cell into pre-stage boost cell and stacking the output voltage, the proposed converter can achieve high voltage gain property. Meanwhile, by introducing coupled-inductor cell into post-stage boost cell, voltage stress of power switch is decreased. Furthermore, passive snubber is utilized to suppress voltage spike stress of the switch and low-voltage-rated MOSFET with low RDS(on) for reduction of the conduction loss and cost can be chosen, therefore efficiency of the converter improved. Finally, Steady state analysis of the converter and operating characteristics is developed and experimental results from a 200 W 20V/200 V prototype were presented to verify the analysis of the proposed converter.
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