中文摘要：

提出一种Flyback变换器与Boost变换器相结合的非隔离型高增益直流变换器.该变换器中的Flyback变换器变压器原边电感和Boost变换器电感共用,Flyback变换器的开关管和Boost变换器开关管共用,Flyback变换器的输出和Boost变换器的输出串联,变压器漏感能量能够回馈到Boost变换器的输出,从而获得高增益高效率特性.电路具有结构简单、开关器件电压应力减少的优点.详细分析了拓扑工作原理、电压增益与效率特性.制作了一台100kHz开关频率/80W负载/24V输入/200V输出的实验样机,样机在轻载下可达到91.6％的效率,实验波形验证了理论分析的正确性.

英文摘要：

A non-isolated converter with high gains consisting of a Flyback converter and a Boost converter is pro- posed. The Flyback converter and the Boost converter share a power switch and an inductor. The output of the Fly- back converter is in series with the output of the Boost converter. The energy of leakage inductance of the trans- former of the Flybaek converter can feedback into the output of the Boost converter. The proposed converter can a- chieve high gains and high efficiency. Its advantages include simple construction and reduced voltage stress of pow- er switch. The theory is analyzed, and the characteristic of voltage gains is derived. One prototype with lO0kHz switching frequency, 80W rated load, 24V input voltage and 200V output voltage, is tested. Its efficiency reaches 91.6% under 15W, and the test waveforms verify the theoretical analysis.