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中文摘要：
光伏、燃料电池等新能源系统的应用使低输入电流纹波高增益DC-DC变换器成为研究热点。在一种零输入电流纹波Boost变换器基础上,采用耦合电感,提出一种零输入电流纹波高增益非隔离DC-DC变换器。通过设计耦合电感变比,可实现变换器的高升压增益特性。耦合电感中存在的漏感在减缓二极管关断电流的di/dt的同时,却带来了开关管两端严重的电压尖峰。为了降低开关管两端的电压尖峰,提出采用无源无损吸收电路以吸收漏感能量和开关管两端电压尖峰的零输入电流纹波高增益非隔离DC-DC变换器,进而可选取低导通电阻、低电压等级的MOSFET以降低导通损耗,提高了变换器的效率。另外,变换器几乎实现了输入电流的零纹波,基本上不需要输入滤波器,从而减小了变换器成本及体积。文中分析变换器的工作原理及工作特性,最后通过搭建一台100 W、40 V/200 V的实验样机,验证理论分析的正确性。
英文摘要：
High voltage gain non-isolated DC-DC converters with low input current ripple have attracted much attention for photovoltaic cells, fuel cells and other renewable energy system applications. A zero input current ripple high voltage gain non-isolated converter was proposed, which combines a zero input current ripple boost converter and a coupled-inductor cell to achieve high voltage step-up. In addition, diode reverse recovery losses of the proposed converter was alleviated due to the leakage inductance of the transformer, but it cause serious voltage spike stress of the switch. Therefore, the passive lossless clamp circuit was adopted to recycle the leakage energy and thus a low-voltage-rated MOSFET with low Rds_on for reduction of the conduction loss and cost can be chosen. In addition, the proposed converter can nearly achieve zero input current ripple, and remove the electromagnetic interference（EMI）filter without sacrificing the performance of the converter.Consequently, small passive components, light weight and low costs can be achieved. Steady state analysis of the converter and operating characteristics was developed. Finally,experimental results from a 100 W 40 V/200 V prototype were presented to verify the analysis of the proposed converter.
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